Rion VM-83 Instruction Manual

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This manual describes the features and operation of the Vibration Meter VM-83. To ensure safe use, the manual first lists important safety precautions. Be sure to read this section thoroughly. The manual contains the following sections. Outline Gives basic information on the configuration and features of the unit, and con- tains a block diagram. Controls and Features Briefly identifies and explains all parts of the unit. Preparations Describes installation, connections, inserting batteries, pre-use checks and other steps. Measurement Describes the steps for measurement. Comparator Describes how to use the comparator function. Printer Gives information on a printer that can be connected to the unit. Serial Interface Describes how to use the serial interface for connection to a computer. Technical Information Provides additional information that is helpful for using the unit. Specifications Lists the technical specifications of the unit. Index Index to the contents of the manual. All company names and product names mentioned in this manual are trademarks or registered trademarks of their respective owners. www.64817.com

ogy in the Foreign Exchange and Foreign Trade Control Act". Export of this item from Japan requires an export license from the Government of Japan. The product described in this manual is in conformity with the following European standards; EN 61000-6-3:2001 EN 61000-6-1:2001 *EN 61000-6-2:2001 Note: CE requirements are met provided that a core filter is fitted to every cable. *The measurement result may be influenced when the instrument is used in a radio-frequency electromagnetic (RFE) field. To conform to the EU requirement of the Directive 2002/96/EC on Waste Electrical and Electronic Equipment, the symbol mark on the right is shown on the instrument. www.64817.com

prevent the risk of death or injury to persons and severe damage to the unit or periph- eral equipment, make sure that all instructions are fully understood and observed. Caution Important Disregarding instructions printed here incurs the risk of damage to the product. Disregarding instructions printed here incurs the risk of injury to persons and/or dam- age to peripheral equipment. Mentioned about the tips to use this unit properly. (This mes- sages do not have to do with safety.) Note 1234567890123456789012345678901212345678901234567890123456789012123456789012 1234567890123456789012345678901212345678901234567890123456789012123456789012 1234567890123456789012345678901212345678901234567890123456789012123456789012 1234567890123456789012345678901212345678901234567890123456789012123456789012 www.64817.com

� Take care not to drop the unit, and protect it from shocks and vibrations. � Do not store or use the unit in locations where the unit may be subject to - splashes of water or high levels of dust, - air with high salt or sulphur content, or other gases or chemicals, - high temperature or humidity (above 50°C, 90% RH), or direct sun- light, - directly transmitted vibrations or shock. � Observe the following precautions after using the unit: - Always switch off the power. - When the unit is not to be used for an extended period, remove the batteries to prevent possible damage caused by battery leakage. � Do not disassemble the unit or attempt internal alterations. � Have the unit checked and serviced regularly. (Sensitivity calibration can be performed at the factory for a fee.) � When powering the unit externally, use only the specified AC adapter (option). Using a different adapter may cause malfunction or damage. � Do not tap the LCD panel for example with your finger or a pen, to prevent possible malfunction or damage. � In case of malfunction, do not attempt any repairs. Note the condition of the unit clearly and contact the supplier. � When disconnecting cables, always hold the plug and do not pull the cable. Do not apply excessive force. � When disposing of the unit or the accessories, follow national and local regulations regarding waste disposal. www.64817.com

FOR SAFETY .......................................................................... iii Precautions .................................................................................v Outline........................................................................................1 Controls and Features.................................................................3 Front Panel ............................................................................3 Rear Panel..............................................................................5 Side Panel ..............................................................................7 Display...................................................................................8 Preparations..............................................................................11 Power Supply.......................................................................11 Inserting Batteries................................................................11 AC Adapter..........................................................................12 Using the Prop-up Feet ........................................................13 Selecting an Accelerometer .................................................14 Connecting the Accelerometer ............................................15 Setting the INPUT SELECT Switch ...................................17 Accelerometer Sensitivity Calibration ................................18 Measurement ............................................................................20 Power-On.............................................................................20 Measurement Mode Setting.................................................21 Display Characteristics Setting............................................22 High-Pass Filter Setting.......................................................23 Low-Pass Filter Setting .......................................................24 Level Range Setting ............................................................25 Menu Settings ......................................................................27 Calibration ...........................................................................31 Maximum Value Hold .........................................................33 Peak Hold ............................................................................36 www.64817.com

Transmission Principle ........................................................47 Local Mode/Remote Mode ..................................................48 Transfer Protocol .................................................................51 Error Processing ..................................................................53 Control Operation in Remote Mode ....................................53 Command Format ................................................................54 Communication with Multiple Units using SC-31M/SC-31S ......66 Technical Information ..............................................................69 Noise Level and Measurement Range .................................69 Group Delay ........................................................................73 Rack Mounting ....................................................................73 Accelerometer Installation...................................................74 Display Range .....................................................................76 Aliasing Effect .....................................................................77 Filter Characteristics............................................................78 VM-83PB1 Software ...........................................................80 Specifications ...........................................................................81 Index ........................................................................................93 www.64817.com

vibrations, using a piezoelectric accelerometer or a servo accelerometer. It pro- vides four types of input connectors and allows selection of acceleration, veloc- ity, and displacement measurement. With the optional servo accelerometer, even very low frequency vibrations in the range of 0.1 to 1 Hz can be measured, something that is very hard to achieve with conventional piezoelectric acceler- ometers. Display characteristics can be switched to rms, equivalent peak, and equivalent peak-to-peak. Peak hold and max. hold functions are also available, and a com- parator with level evaluation output is also available. AC output, DC output, and a serial interface are provided as standard equip- ment. www.64817.com

� � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � Controls and Features Front Panel LEVEL RANGE keys Serve for switching the level range up ( ) or down ( ). Display backlight key Serves for turning the display backlight on and off. When the unit is operating on batteries, the display automatically turns itself off after 60 seconds. When the batteries are run down, the display will be darker. Calibration key (CAL key) This key turns the calibration signal supplied at the AC and DC outputs on and off. The signal is used to perform calibration of external equipment. Accelerometer sensitivity key (PICKUP SENS key) Serves for setting the accelerometer sensitivity. When the accelerometer sen- sitivity setting mode is on, the indicator above the key lights. www.64817.com

MENU key Allows changing the menu by selecting a menu number. If this key is pressed in remote control mode, the remote mode is canceled and the unit returns to the local mode. Power switch Serves to turn the unit on and off. COMP ON/OFF key Serves to turn the comparator function on and off. HOLD RESET key Serves for resetting maximum hold data and peak hold data, as well as the comparator output. Low-pass filter key Serves for activating the low-pass filter (indicator above the key lights). MAX HOLD ON/OFF key Serves to turn the maximum value hold function on and off. High-pass filter key Serves for activating the high-pass filter (indicator above the key lights). Accelerometer input connector The piezoelectric accelerometer is to be connected here. Setting keys Serve to set the measurement mode, display characteristics, low-pass filter, high-pass filter, and accelerometer sensitivity. The keys will affect the func- tion for which the key indicator is lit. The keys are also used for changing menu settings. Measurement mode selector key Serves to change the measurement mode (indicator above the key lights). Display characteristics selector key Serves to change the display (detection) characteristics (indicator above the key lights). Display Shows measurement values and various key settings.

Rear Panel Battery holder Four IEC R14 (size C) batteries are inserted here. Battery holder button Push this button to lock or unlock the battery holder. AC output connector An AC signal corresponding to the measurement value is available at this connector (full-scale point: 2 V, output impedance approx. 600 ohms). DC output connector A DC signal corresponding to the measurement value is available at this connector (full-scale point: 2 V, output impedance approx. 600 ohms). External power supply connector The AC adapter (option) can be connected here.

Comparator output terminals The comparator signal is available at these terminals. The maximum applied voltage is 24 V, and the maximum drive current varies as follows depending on the impressed voltage. 50 mA (when the impressed voltage is 24 V) 25 mA (when the impressed voltage is 12 V) 10 mA (when the impressed voltage is 5 V) Input select switch Serves to select the input source. Available settings are ACCELEROMETER / PREAMP 1 / PREAMP 2 / SERVO / SERVO . Serial interface connector Serves for connection of a computer or printer. Servo input connector The servo accelerometer (LS-10C or LS-20C) can be connected here. Preamplifier 2 input connector A piezoelectric accelerometer with integrated preamplifier can be connected here. Preamplifier 1 input connector A piezoelectric accelerometer can be connected here via a preamplifier.

Side Panel � � � � � � � � � � � � � � � � � � � �

� � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � Display For explanation purposes, the illustration below shows all display elements. In actual use, not all elements will be seen together. COMP indicator This indicator appears when the comparator function is used. REMOTE This indicator appears when the unit is being controlled remotely over the serial link. OVER indicator This indicator appears when the input signal has caused overload.

Units indicator The measurement unit applicable to the current measurement mode is shown here. m/s2 When a piezoelectric accelerometer is used, this indicator ap- pears during acceleration measurement. mm/s2 When a servo accelerometer is used, this indicator appears during acceleration measurement. mm/s This indicator appears during velocity measurement. mm This indicator appears during displacement measurement. pC/(m/s2) This indicator appears during sensitivity setting for the pi- ezoelectric accelerometer. Low-pass filter indicator Shows the low-pass filter setting. High-pass filter indicator Shows the high-pass filter setting. RMS/EQ PEAK/EQ P-P indicators Shows the display (detection) characteristics setting. Measurement value Shows the current measurement value, maximum hold value, peak hold value, menu settings, etc. PEAK/MAX HOLD/OVER indicators When the maximum hold function has been activated, the MAX HOLD in- dicator is displayed. When the peak hold function has been activated, the PEAK HOLD indicator is displayed. When the hold value has exceeded the measurement maximum, the OVER indicator is displayed. Bar graph When the level range setting is 10000, 1000, 100, 10, 1, 0.1, or 0.01, the indication follows the upper scale: 0, 2, 4, 6, 8, 10. When the level range setting is 3000, 300, 30, 3, 0.3, 0.03, or 0.003, the indication follows the lower scale: 0, 1, 2, 3. The bar graph indication corresponds to the input level.

� � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � UNDER indicator This indicator appears when the input signal has fallen below the measure- ment threshold. Battery capacity indicator Shows the remaining capacity of the batteries. CAL indicator This indicator appears during calibration. Level range indicator Shows which level range has been selected.

� � � � � � � � � � � � � � Preparations Power Supply This unit can be operated either on four IEC R14 (size C) batteries or an AC adapter (option). Inserting Batteries Unlock the battery holder by pressing the battery holder button and pull out the battery holder. After replacing the batteries, push the battery holder back into the unit. Be sure to lock the holder by pressing the battery holder button again. Important - While inserting or removing batteries, support the battery holder by hand. - Take care not to insert batteries with wrong polarity. - While not using the unit, the batteries should be removed. - When opening the battery holder, take care that no foreign objects or dirt get deposited in the holder. - Do not mix old and new batteries, or different types of batteries. � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � �

� � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � Battery life Alkaline batteries LR14 approx. 20 hours Manganese batteries R14P approx. 9 hours * The above values were determined under the following conditions. 20°C 50% RH, accelerometer PV-85, ACC, HPF OFF, LPF OFF, back- light OFF, switch LEDs OFF, communications OFF (MENU 0-0), con- tinuous operation * The actual battery life will differ, depending on the accelerometer, set- tings, ambient conditions, and battery type. When the backlight is used, battery consumption will be about 20% higher. When the servo accelerometer is connected, current consumption increases by about 15%. Remaining battery capacity indication The following indication appears on the display, depending on the battery sta- tus. Note When the battery indicator start to flash, replace the batteries immediately. While the indicator is flash- ing, the measurement will not be accurate. AC Adapter The unit can be powered from the following adapter: NC-98 (option) Connect the cable from the AC adapter to the external power supply connector on the rear panel.

� � � � � � � � � � � � Using the Prop-up Feet The unit can be tilted by flipping out the prop-up feet. Tilt the feet until they snap in place. Important When using the prop-up feet, do not place ob- jects on top of the VM-83 and do not push down on the unit.

The VM-83 can use piezoelectric accelerometer or servo accelerometer. Select the type of accelerometer according to the intended measurement range vibra- tion frequency, environmental conditions, and other related factors. - Some major piezoelectric accelerometers made by Rion (representative values) General High-output Light weight Heat-resistant 3-axis Model PV-85 PV-87 PV-90B PV-65 PV-93 Charge sensitivity 6 40 0.15 7 0.7 (pC/(m/s2) ) Mounting resonance 24 9 70 25 30*2 frequency (kHz) *1 Frequency range (Hz) 1 to 7000 1 to 3000 1 to 25000 1 to 9000 1 to 8000*2 Temperature range (°C) -50 to +160 -50 to +160 -50 to +160 -50 to +260 -50 to +160 Mass (g) 23 115 1.2 26 28 Construction principle Shear type Shear type Shear type Shear type Shear type *1 When mounted with specified screws at specified torque *2 Vertical direction value - Servo accelerometer The servo accelerometer model that can be used with the VM-83 is the LS-10C or LS-20C. Model LS-10C LS-20C Voltage sensitivity (V/(m/s2)) 0.300 0.3000 Vibration frequency range DC to 100 Hz DC to 100 Hz Temperature range (°C) -20 to +60 -20 to +60 Mass (g) 220 125

� � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � Connecting the Accelerometer Note Before connecting the accelerometer, turn power to the unit OFF. Piezoelectric accelerometer Direct connection Use the cable supplied with the accelerometer (VP-51 series) to connect the accelerometer to the ACCELEROMETER input connector on the VM-83. Because the input circuit is configured as a charge amplifier, accelerometer cable length has almost no effect on sensitivity. However, a long cable may lead to an increase in internal noise. The cable run should therefore be kept as short as possible. If the cable length exceeds 5 meters, the use of a preamplifier is recommended. Connection via a preamplifier When the accelerometer is to be installed at a remote location, a preampli- fier should be used to minimize noise and susceptibility to interference. The preamplifier should be located close to the ac- celerometer, and the longer cable run should be between the preamplifier and the VM-83. Use the cable supplied with the accelerometer (VP-51 series) to connect the accelerometer to the input of the preamplifier (VP-26A etc.). Connect the output of the preamplifier to the PREAMP 1 input connector on the VM-83, us- ing a cable of the EC-02 series.

� � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � EC-02 series cables are available in six different lengths, as listed below. Choose the cable that is most suitable for your application. EC-02: 3 m EC-02A: 5 m EC-02B: 10 m EC-02C: 30 m (with reel) EC-02D: 50 m (with reel) EC-02E: 100 m (with reel) Connection of an accelerometer with built-in preamplifier When using an accelerometer with built-in pream- plifier (PV-41, PV-42), use the cable supplied with the accelerometer (VP-51 series) to connect the ac- celerometer to the PREAMP 2 input connector on the VM-83. Servo accelerometer LS-10C or LS-20C Connecting the servo accelerometer LS-10C or LS-20C Use a cable of the EC-40 series to connect the accel- erometer to the SERVO (LS-10C or LS-20C) input connector on the VM-83. EC-40A: 5 m EC-40B: 10 m EC-40C: 30 m (with reel) EC-40D: 50 m (with reel)

Set the INPUT SELECT switch as required for the type of input that is being used. ACCELEROMETER : Signal from ACCELEROMETER connector on front panel PREAMP1 : Signal from PREAMP 1 connector on rear panel PREAMP2 : Signal from PREAMP 2 connector on rear panel SERVO : Signal from SERVO connector on rear panel. Servo accel- erometer set to vertical axis. SERVO : Signal from SERVO connector on rear panel. Servo accel- erometer set to horizontal axis. Note During calibration, comparator operation, maximum hold and peak hold, changing the setting of the IN- PUT SELECT switch has no effect.

Important Different accelerometers have different sensi- tivity. Be sure to perform sensitivity calibration. Sensitivity calibration 1. Set the INPUT SELECT switch as required. 2. Set the power switch to ON. 3. Press the ACCELEROMETER SENS key on the front panel. (The indi- cator above the key lights up and the sensitivity value flashes.) � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � �

, ) to set the display indication to the value indi- cated as charge sensitivity on the calibration chart of the accelerometer. When an accelerometer with integrated preamplifier is used, enter the voltage sensitivity. For example, when the voltage sensitivity is 5.90 mV /(m / s2), use the value 5.90 pC / (m / s2). For the servo accelerometer LS-10C, enter 0.300. For the servo accelerometer LS-20C, enter the value according to the calibration data (approx. 0.300). When using the preamplifier VP-26A, set the charge sensitivity. Holding one of the setting keys down for more than 2 seconds causes the display value to change quickly. � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � �

off are reestablished (resume function), and measurement starts. The level range, high-pass filter setting, low-pass filter setting, and display characteristics are memorized for each measurement mode. Settings memorized by Settings reset at regular resume function vibration measurement start* Measurement mode CAL status Level range Maximum value hold Display characteristics Peak hold High-pass filter Backlight status Low-pass filter Sensitivity setting status Sensitivity MENU setting status MENU0 to MENU2 item settings Comparator status MENU4 to MENU8 item settings Remote status * These measurement conditions are not memorized by the resume function. They will be reset to the default vibration measurement con- dition when the unit is turned on. Note Settings made via the serial interface are not memo- rized for the resume function.

Select the measurement mode from ACC (acceleration), VEL (velocity), or DISP (displacement). Setting procedure 1. Press the ACC/VEL/DISP key. (The indicator above the key lights up.) 2. Use the setting keys ( , ) to select from ACC → VEL → DISP. ACC (acceleration) : m/s2, mm/s2 VEL (velocity) : mm/s DISP (displacement) : mm Note The unit for acceleration (ACC) measurement de- pends on the setting of the INPUT SELECT switch. ACCELEROMETER, PREAMP 1, PREAMP 2 : m/s2 SERVO , SERVO : mm/s2 � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � �

Select the display (detection) characteristics from RMS, EQPEAK, or EQP-P. Setting procedure 1. Press the RMS/PEAK/P-P key. (The indicator above the key lights up.) 2. Use the setting keys ( , ) to select from RMS → EQPEAK → EQP-P. RMS : effective value EQPEAK : Equivalent peak value EQP-P : Equivalent peak-to-peak value The equivalent peak value and equivalent peak-to-peak value are cal- culated according to the following formula. Equivalent peak value = rms × � Equivalent peak-to-peak value = equivalent peak value ×2 � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � �

Setting procedure 1. Press the HPF key. (The indicator above the key lights up.) 2. Use the setting keys ( , ) to select the filter setting. The available set- tings are listed below. Piezoelectric accelerometer 1 Hz, 3 Hz, 10 Hz, 20 Hz, 50 Hz, -- (OFF; ACC only) Servo accelerometer 0.1 Hz, 0.3 Hz, 1 Hz For more information on the characteristics of the high-pass filter, please refer to the Technical Information. � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � �

Setting procedure 1. Press the LPF key. (The indicator above the key lights up.) 2. Use the setting keys ( , ) to select the filter setting. The available set- tings are listed below. Piezoelectric accelerometer 100 Hz, 300 Hz, 1 kHz, 3 kHz, 10 kHz, -- (OFF; ACC only) Servo accelerometer LS-10C 50 Hz, 100 Hz For more information on the characteristics of the low-pass filter, please refer to the Technical Information. � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � �

Set the level range as follows. Use the setting keys ( , ) to select an appropriate level range. The relationship between INPUT SELECT switch, accelerometer sensitiv- ity, measurement mode, and HPF is shown in the table on the next page. � � � � � � � �

1, or PREAMP 2 (*0 HPF: 1 Hz; *1 HPF: 3 Hz; *2 HPF: 10 Hz) Sensitivity Measurement Level range mode 0.030 ACC 3 10 30 100 300 1000 3000 10000  VEL 30 100 300 1000 3000 10000 - - 0.999 DISP*0 - 10 30 100 300 1000 3000 10000 pC/(m/s2) DISP*1 3 10 30 100 300 1000 3000 10000 DISP*2 0.3 1 3 10 30 100 300 1000 1.00 ACC 0.3 1 3 10 30 100 300 1000  VEL 3 10 30 100 300 1000 - - 9.99 DISP*0 - 1 3 10 30 100 300 1000 pC/(m/s2) DISP*1 0.3 1 3 10 30 100 300 1000 DISP*2 0.03 0.1 0.3 1 3 10 30 100 10.0 ACC 0.03 0.1 0.3 1 3 10 30 100  VEL 0.3 1 3 10 30 100 - - 99.9 DISP*0 - 0.1 0.3 1 3 10 30 100 pC/(m/s2) DISP*1 0.03 0.1 0.3 1 3 10 30 100 DISP*2 0.003 0.01 0.03 0.1 0.3 1 3 10 - When INPUT SELECT switch is set to SERVO or SERVO Sensitivity Measurement Level range mode 0.100 ACC 10 30 100 300 1000  VEL 1 3 10 30 100 0.999 DISP 0.1 0.3 1 3 10

function are made via menus. 1. Call up the menu screen. Note If one of the keys CAL, COMP ON/OFF, or MAX HOLD ON/OFF is set to ON, the menu screen will not appear. � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � �

With each push of the MENU key, the menu number cycles through 0 → 1 → 2 → 3 → 4 → 5 → 6 → 7 → 8 → measurement screen. 3. Select the number of the desired menu, and use the setting keys ( , ) to change the displayed value. Note The new setting will become effective when switch- ing back from the menu screen to the measurement screen. Menu contents Menu 0 Serial interface and printer function ON/OFF 0-0 Serial interface and printer function OFF. Choose this set- ting when using neither the serial interface nor the printer function. 0-1 Serial interface ON 0-2 Printer function ON Menu 1 Serial interface and printer transfer rate 1-96 Transfer rate 9600 bps When the printer function is set to ON, select the 1-96 setting. 1-19 Transfer rate 19200 bps � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � �

2- Choose a setting from 0 to 15. Menu 3 Peak hold function ON/OFF 3-0 Peak hold function OFF 3-1 Peak hold function ON Menu 4 Comparator function and comparator level Sets the comparator function and chooses a level between 0 and 98% of the full-scale value, in 2% steps. 4- Choose a setting from 0 to 98 in steps of 2. Menu 5 Delay time for comparator function Sets the delay time in the range from 0 to 9 seconds. 5- Choose a setting from 0 to 9 in steps of 1. Menu 6 Comparator function auto reset ON/OFF 6-0 Auto reset function OFF 6-1 Auto reset function ON Menu 7 Auto reset time for comparator function When auto reset has been set to ON with menu 6, this setting deter- mines the auto reset time in the range from 0 to 90 seconds, in 1 sec- ond steps. 7- Choose a setting from 0 to 90 in steps of 1.

This controls buzzer use for the comparator function. When enabled, the buzzer sounds while the comparator output is active. When dis- abled, there is no buzzer sound also when the comparator output is active. 8-0 Buzzer disabled 8-1 Buzzer enabled Note The settings for menus 0 to 2, and 4 to 8 will be re- tained also while the unit is turned off. Menu number Setting 0-0 Serial interface and printer OFF 0 0-1 Serial interface ON 0-2 Printer ON 1 1-96 9600 bps 1-19 19200 bps 2 2- ID number setting 0 to 15 3 3-0 Peak hold OFF 3-1 Peak hold ON 4 4- Comparator level setting 0 to 98 (in 2 steps) 5 5- Delay time setting 0 to 9 6 6-0 Auto reset OFF 6-1 Auto reset ON 7 7- Auto reset time setting 0 to 90 8 8-0 Buzzer disabled 8-1 Buzzer enabled

signal of the VM-83, perform calibration as follows. In the CAL (calibration) state, the range full-scale signal is output from the AC output and DC output. � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � �

ETER, PREAMP 1, or PREAMP 2 AC output (AC OUT) : 80 Hz, 2 V* DC output (DC OUT) : 2 V (2) When INPUT SELECT switch on rear panel is set to SERVO or SERVO AC output (AC OUT) : 1 Hz, 2 V * DC output (DC OUT) : 2 V Pressing the CAL key again turns the calibration mode off. * AC output signal in calibration mode Display characteristics RMS : 2 Vrms output EQPEAK : 2 Vpeak output EQP-P : 2 Vp-p output Note In calibration mode, all controls except the LIGHT key, CAL key, and power switch are inactive. To enable correct output of the calibration signal when the CAL key is pressed, the following settings are required. - COMP ON/OFF : OFF - MAX HOLD ON/OFF : OFF - Menu 3, Peak hold ON/OFF : OFF When the range setting is 0.03, 0.3, 3, 30, 300, or 3000, the range full-scale value is 0.0316, 0.3162, 3.162, 31.62, 316.2, or 3162, respectively.

This function serves for memorizing the maximum measured value. Setting procedure 1. Press the MAX HOLD ON/OFF key to set the function to ON. 2. When the maximum hold function is ON, the indication MAX HOLD appears on the display, and the indicated numeric value is the maximum value measured up to that point. When a higher value occurs, the display is updated. � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � �

indication MAX HOLD OVER is shown. 4. The HOLD RESET key can be used to reset the maximum hold value at any time. � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � �

The unit returns to normal measurement. Note While the maximum hold function is ON, all con- trols except the LIGHT key, MAX HOLD ON/OFF key, HOLD RESET key, and power switch are inac- tive. The maximum hold function applies only to the nu- meric display. The bar graph indication continues to function as during normal measurement.

determine the peak value. Setting procedure 1. Use the MENU key to call up menu 3. 2. Use the setting keys to select the setting 3-1 (peak hold ON). 3. Return to the measurement screen. 4. When the peak hold function has been activated, the indication PEAK HOLD appears on the display, and the indicated numeric value is the peak value measured up to that point. When a higher peak occurs, the display is updated. When the peak hold value is higher than the overload threshold, the indi- cation PEAK HOLD OVER is shown. 5. The HOLD RESET key can be used to reset the peak hold value at any time. � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � �

display. The bar graph indication continues to func- tion as during normal measurement. While the peak hold function is ON, all controls ex- cept the LIGHT key, MENU key, HOLD RESET key, and power switch are inactive. Turning the peak hold function off Set the menu 3 item to 3-0. Note The peak hold function is available only for ACC (acceleration) measurement. The bar graph continues to operate with the display characteristics as selected before activating peak hold.

and comparing it to a preset reference level (comparator level). If the compara- tor level is exceeded, the comparator output becomes active (open collector circuit, LCD flashing, buzzer sounds). To turn the comparator function on and off, use the COMP ON/OFF key. Pressing the COMP ON/OFF key once turns the function on and pressing it once more turns it off again. The various settings for the comparator function are made via menu screens (see "Menu Settings" on page 27). Setting items � Comparator level 0 to 98% in 2% steps � Delay time 0 to 9 seconds in 1 s steps � Auto reset function � Auto reset time 0 to 90 seconds in 1 s steps � Buzzer � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � �

In the bar graph indication, the bar corresponding to the comparator reference level remains constantly on. Comparator level The comparator level is the threshold where the comparator output becomes active. This setting is made with menu 4. (See "Menu settings" on page 27.) For example, if the comparator level is set to 48%, the level corresponding to 48% of the level scale value is the threshold, and the 48% point of the bar graph scale is on. � � � � � � � � � � � � � � � � � � � � � � � � � � Note While the comparator function is ON, all controls except the LIGHT key, HOLD RESET key, COMP ON/OFF key, and power switch are inactive.

The auto reset function is controlled with menu screen 6 (see "Menu Settings" on page 27). When the function is set to ON and the vibration level has fallen again below the comparator level, the comparator output will automatically be reset (turned off) after the auto reset time has elapsed. When the function is set to OFF, the comparator output remains on until the HOLD RESET key is pressed or the comparator function is turned off with the COMP ON/OFF key. Auto reset time The auto reset time is set with menu screen 7 (see "Menu Settings" on page 27). When the function is set to ON and the vibration level falls below the compara- tor level, the comparator output will be reset after this time. The auto reset time can be set from 0 to 90 seconds in 1 second intervals. This setting is used when the auto reset function has been set to ON. Buzzer This setting controls operation of the buzzer when the comparator is activated. The setting is made with menu screen 8 (see "Menu Settings" on page 27). � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � �

(1) Auto reset As described above, when auto reset is ON, the comparator output will be turned off automatically after activation when the auto reset time has elapsed. (2) HOLD RESET key Pressing the HOLD RESET key on the front panel immediately resets the comparator output. This function is independent of the auto reset ON/OFF setting. (3) COMP ON/OFF key Turning the comparator function off by pressing the COMP ON/OFF key on the front panel immediately resets the comparator output. With methods (1) and (2), the comparator function remains ON also after reset. With method (3), the unit returns to normal measurement.

(1) Buzzer is heard (long intermittent beeps). This applies only if the buzzer function has been set to ON with menu 8. (2) LCD display flashes. Measurement value indicator section flashes in 0.5 second intervals. (3) Open collector circuit operates, causing the comparator output terminals on the rear panel to close. Circuit block diagram Maximum drive current: 50 mA (when impressive volume is 24 V) 25 mA (when impressive volume is 12 V) 10 mA (when impressive volume is 5 V) Maximum applied voltage: 24 V � � � � � � � � �

sults. The following printers are compatible with the VM-83: CP-10, CP-11, DPU-414 Activating printer operation 1. Turn power to the VM-83 and the printer off. 2. Use a separately purchased cable to connect the serial interface connector on the rear panel of the VM-83 to the printer (option). Cable: Straight serial cable (generic) Connector type on VM-83: 9-pin D-sub, male Connector type at printer: 25-pin D-sub, female (For DPU- 414, use the connector adapter supplied with the printer.) 3. Set the DIP switches on the printer as required, then turn on the printer and set it to ON LINE. 4. Set the power switch of the VM-83 to ON. 5. Using the menu screens, select the menu settings 0-2 and 1-96. When you switch back from the menu screen to the measurement screen, printing starts. � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � Printer

1. Using the menu screens, select the menu setting 0-0. 2. Disconnect the cable. Note printer operation is paused during calibration, com- parator operation, sensitivity setting, and while us- ing the menu screens. DIP switch settings for printers CP-11, CP-10 Set the DIP switches for the respective printers as shown below. Note Switches 7 and 8 of DIP switch bank 2 of printer CP-11 are set individually at the factory before shipping. � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � �

When connecting the printer DPU-414, set the DIP switches 1 to 3 for the printer software as follows. For more information on making these settings, please refer to the instruction manual and the guide sheet of the DPU-414. Vibration Meter VM-83 (9600 bps) 1 OFF 2 ON 3 ON SW-1 4 OFF 5 ON 6 OFF 7 ON 8 ON 1 ON 2 ON 3 ON SW-2 4 ON 5 ON 6 ON 7 ON 8 ON 1 ON 2 ON 3 OFF SW-3 4 ON 5 OFF 6 ON 7 ON 8 ON

seconds as one line. " " is used to indicate an OVER occurrence and "#" an UNDER occurrence. � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � �� � � �� � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � �

parameters and control measurement using commands sent from a computer. Measurement results can also be sent to the computer. Using SC-31M or SC-31S adapters (option), a single computer can be used to control up to 16 VM-83 units. Transmission Principle Transfer principle : asynchronous, half-duplex Data word length : 8 bit Stop bits : 2 Parity : none Baud rate : 9600 bps, 19200 bps Cable type : Generic cross-wired serial cable (null modem) Connector on VM-83 9-pin D-sub, male (When using an SC-31 adapter, cross-wired cable is not required.)

� Local mode In this mode, the controls on the panel of the VM-83 are used to operate the unit. Immediately after being turned on, the unit is always in local mode. � Remote mode In this mode, the VM-83 operates in response to commands sent from a computer. Only the MENU key and LIGHT key on the VM-83 are active, all other controls are disabled. The indication REMOTE appears on the display of the VM-83 when the unit is in remote mode. � Switching between local mode and remote mode The RMT command is used to switch between local mode and remote mode.

� � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � Preparation 1. Turn power to the VM-83 and the computer off. 2. Use a separately purchased cable to connect the serial interface connector on the rear panel of the VM-83 to the computer. Cable : Generic cross-wired serial cable (null modem) Connector type on VM-83: 9-pin D-sub, male 1:1 connection 1:N connection When wishing to connect multiple VM-83 units (up to 16) to one com- puter, the optional SC-31M/SC-31S adapters and LAN cables (generic 10BaseT cable) are required. Connection example Maximum allowable wiring distance: 400 m

4. Make the required menu settings at the VM-83. For details, please refer to "Menu Settings" on page 27. Menu 0-1 Menu 1-96 or 1-19 Set transfer rate. Menu 2- Set ID number. Note ID number The ID number serves to identify the VM-83 unit when multiple units are connected to one computer. In such a setup, the ID number must be set to a unique setting for each VM-83. Even if only one VM-83 unit is connected to the computer, the ID number must be set.

In order to control the VM-83 from a computer or to retrieve measurement data, certain commands must be sent to the VM-83. The data exchange must be per- formed according to certain rules, to ensure that both the VM-83 and the com- puter recognize the commands and data properly. To send commands to the VM-83, the following procedure must be observed. The following explanation assumes that the preparations described on page 49 have been completed. ** stands for the ID number. Example : If the ID number 0 is set, ** stands for 00. 1. The computer sends RMT1** to the VM-83. 2. When RMT1** has been received, the VM-83 returns READY to the computer. The link is now estab- lished, and the indication REMOTE appears on the display of the VM-83. 3. To change a setting at the VM-83, the computer sends (setting command) to the VM-83. 4. When a valid setting command is received by the VM-83, it carries out the respective processing steps. When these are completed successfully, the VM-83 returns an READY to the computer. 5. To receive data, the computer sends (data request command) to the VM-83. 6. When the VM-83 receives a command which requests data, it carries out the respective processing steps and sends (data) to the computer. 7. To terminate the link, the computer sends RMT0** to the VM-83.

the rules described above must be observed. If an error occurs, the following steps should be taken. - The computer has sent RMT1** but the REMOTE indicator on the VM-83 does not light. Send RMT1** again after about 4 seconds. Repeat this 2 to 3 times. If the REMOTE indicator still does not light, one of the following conditions may exist: - Transfer parameters do not match. (Check settings made with menu screens.) - Interface cable is defective or not properly connected. - VM-83 is not powered. - ID number setting does not match. When the computer has sent a wrong command or the parameter is out of range, the VM-83 disregards that command. If the VM-83 is in receiving mode but there is no command from the computer for 4 seconds or more, the receive mode times out. Control Operation in Remote Mode While the VM-83 is in remote mode, only the LIGHT key and MENU key are active. The LIGHT key allows turning the display backlight on and off, and the MENU key in remote mode serves for switching back to local mode. This al- lows manual override of remote mode at any time.

usually followed by a parameter which specifies the action range of the com- mand. There are two types of parameters: - Parameters for changing function settings - Parameter for requesting data The parameters for changing function settings are numerals, and the parameter for requesting data is "?". In the following command description, the function setting parameters are denoted by "n". The data output by the VM-83 in re- sponse to the data requesting parameter are denoted by "p". Note The VM-83 cannot process multiple commands sent together. � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � �

Select local mode/remote mode 56 RMT? Get ID number and remote mode status 56 RNG n Set level range 56 UNT n Set measurement mode 57 DET n Set display characteristics 58 SNS n1 n2 n3 n4 Set sensitivity 58 LPF n Set low-pass filter setting 59 HPF n Set high-pass filter setting 59 CAL n Set calibration mode 60 CAL? Get calibration mode status 60 BAT? Get battery capacity status 60 DOD? Get measurement data 60 DOF n Output instantaneous value 61 every 0.1 seconds in non-protocol mode MAX n Set maximum hold function to On/Off 62 MAX? Get maximum hold function status 62 PEK n Set peak hold function to On/Off 62 PEK? Get peak hold function status 62 RST Reset hold value 62 CMP n Set comparator function to On/Off 62 CMP? Get comparator function status 62 CMS n1 n2 n3 n4 n5 n6 n7 Make comparator function settings 63 CMS? Get comparator function settings 63 STS? Get setting information 64 Note Settings made via the serial interface are not memo- rized for the resume function (see page 20).

Select local mode/remote mode n1 = 0 Local mode n1 = 1 Remote mode n2 n3 = 00 to 15, FF Sets ID number. VM-83 specified by ID number receives the command. FF specifies all connected VM-83. RMT? Get ID number and remote mode status Output data format p1 p2 p3 p1, p2 is ID number p3 = 1 Remote mode RNG n Set level range Value of n is determined by INPUT SELECT switch set- ting, measurement mode, sensitivity information, and HPF setting, as shown in table below.

PREAMP2 (*0 = HPF 1 Hz, *1 = HPF 3 Hz, *2 = HPF 10 Hz and higher) Sensitivity Measurement n =0 n = 1 n = 2 n = 3 n = 4 n = 5 n = 6 n = 7 mode 0.030 ACC 3 10 30 100 300 1000 3000 10000 VEL 30 100 300 1000 3000 10000 - - 0.999 DISP*0 - 10 30 100 300 1000 3000 10000 pC/(m/s2) DISP*1 3 10 30 100 300 1000 3000 10000 DISP*2 0.3 1 3 10 30 100 300 1000 1.00 ACC 0.3 1 3 10 30 100 300 1000  VEL 3 10 30 100 300 1000 - - 9.99 DISP*0 - 1 3 10 30 100 300 1000 pC/(m/s2) DISP*1 0.3 1 3 10 30 100 300 1000 DISP*2 0.03 0.1 0.3 1 3 10 30 100 10.0 ACC 0.03 0.1 0.3 1 3 10 30 100  VEL 0.3 1 3 10 30 100 - - 99.9 DISP*0 - 0.1 0.3 1 3 10 30 100 pC/(m/s2) DISP*1 0.03 0.1 0.3 1 3 10 30 100 DISP*2 0.003 0.01 0.03 0.1 0.3 1 3 10 - When INPUT SELECT is set to SERVO , SERVO Sensitivity Measurement n = 1 n = 2 n = 3 n = 4 n = 5 mode 0.100 ACC 10 30 100 300 1000  VEL 1 3 10 30 100 0.999 DISP 0.1 0.3 1 3 10 UNT n Set measurement mode n = 0 ACC (acceleration) n = 1 VEL (velocity) n = 2 DISP (displacement)

n = 0 RMS n = 1 EQPEAK n = 2 EQP-P SNS n1 n2 n3 n4 Set sensitivity n1 to n3 : Set sensitivity to 030 to 999 n4 = 0 : Set sensitivity to 1/10 of value specified with n1 to n3 n4 = 1 : Set sensitivity to 1/100 of value specified with n1 to n3 n4 = 2 : Set sensitivity to 1/1000 of value specified with n1 to n3 Explanation for command SNS n1 n2 n3 n4 � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � �

Command action depends in INPUT SELECT switch setting. Piezoelectric accelerometer : ACCELEROMETER, PREAMP1, PREAMP2 Servo accelerometer : SERVO , SERVO Piezoelectric Servo n = 0 100 50 n = 1 300 100 n = 2 1 k 100 n = 3 3 k 100 n = 4 10 k 100 n = 5 OFF 100 n = 6* user filter user filter * This is valid only when the user filter is set up by using VM-83PB1 software (option). HPF n Set high-pass filter setting Command action depends in INPUT SELECT switch setting. Piezoelectric accelerometer : ACCELEROMETER, PREAMP1, PREAMP2 Servo accelerometer : SERVO , SERVO Piezoelectric Servo n = 0 OFF 0.1 n = 1 1 0.3 n = 2 3 1 n = 3 10 1 n = 4 20 1 n = 5 50 1 n = 6* user filter user filter * This is valid only when the user filter is set up by using VM-83PB1 software (option). With piezoelectric accelerometer and measurement mode VEL or DISP, n = 0 setting is not allowed.

n = 0 Calibration OFF n = 1 Calibration ON CAL? Get calibration mode status Output data format p p = 0 Calibration OFF p = 1 Calibration ON BAT? Get battery capacity status Output corresponds to status of battery capacity indicator on display. Output data format p p = 0 Flashing p = 1 1 segment lit p = 2 2 segments lit p = 3 3 segments lit DOD? Get measurement data Returns a value corresponding to the display indication. Output data format p1 p2 p3 p4 E ± p5, p6 p1 to p4 Effective 4 digits of measurement value p5 = -6 to +1 p6 = O (overload occurred) p6 = _ (no overload occurred) (_ is a space) * Explanation of p5 p5 stands for 10p5. For example, when measurement value is 10000, p5 will be 1, because 1000 × 101

value corresponds to MAX HOLD value. Same applies to peak hold mode. When this command is received while there is no display indication, output will be p1 to p4 = 0000. DOF n Output instantaneous value every 0.1 seconds in non-pro- tocol mode n = 0 Instantaneous value output OFF n = 1 Instantaneous value output ON Data will be output every 0.1 seconds. When DOF 0 is received, non-protocol mode output is terminated. For information on output data format, see section on "DOD?". DOF communication format Note Because this unit supports only half-duplex commu- nication, it cannot receive and send data at the same time. When sending the DOF 0 command to the unit, the computer must use timing which ensures that the command does not collide with the instantaneous value data that are being output by the unit. � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � �

n = 0 Maximum hold OFF n = 1 Maximum hold ON MAX? Get maximum hold function status Output data format p p = 0 Maximum hold OFF p = 1 Maximum hold ON PEK n Set peak hold function to On/Off n = 0 Peak hold OFF n = 1 Peak hold ON PEK? Get peak hold function status Output data format p p = 0 Peak hold OFF p = 1 Peak hold ON RST Reset hold value This command is active during maximum hold, peak hold, and comparator operation. CMP n Set comparator function to On/Off n = 0 Comparator OFF n = 1 Comparator ON CMP? Get comparator function status Output data format p p = 0 Comparator OFF p = 1 Comparator ON

Make comparator function settings n1 to n2 : Comparator level 00 to 98 (steps of 2) n3 : Delay time 0 to 9 n4 = 0 : Auto reset OFF n4 = 1 : Auto reset ON n5 to n6 : Auto reset time 00 to 90 (steps of 10) n7 = 0 : Buzzer OFF n7 = 1 : Buzzer ON For items that are not to be changed, send _ (space). CMS? Get comparator function settings Output data format p1 p2 p3 p4 p5 p6 p7 p1 to p2 : Comparator level 00 to 98 p3 : 0 to 9 (delay time) p4 : 0 to 1 (auto reset ON/OFF) p5 to p6 : 00 to 90 (auto reset time) p7 : 0 to 1 (buzzer ON/OFF)

Output data format p1 p2 p3 p4 p5 p6 p7 p8 p9 p10 p1 : INPUT SELECT 0 to 4 p1 = 0 : ACCELEROMETER in- put p1 = 1 : PREAMP 1 input p1 = 2 : PREAMP 2 input p1 = 3 : SERVO input p1 = 4 : SERVO input p2 : Level range 0 to 7 (RNG n) p3 : Measurement mode 0 to 2 (UNT n) p4 : Display characteristics 0 to 2 (DET n) p5 to p8 : Sensitivity (SNS n1 n2 n3 n4) p9 : High-pass filter setting (HPF n) p10 : Low-pass filter setting (LPF n) For information on value in brackets, refer to sections on respective commands.

� indicates that command is allowed (valid). × indicates that command is not allowed (invalid). Command Normal Calibration Comparator Maximum Peak DOF Explanation measurement hold hold operation RMT n1n2n3 � � � � � � Cancel remote mode RMT? � × × × × × RNG n � × × × × × Level range UNT n � × × × × × Measurement mode DET n � × × × × × Display characteristics SNS n1 to n4 � × × × × × Set sensitivity LPF n � × × × × × Low-pass filter HPF n � × × × × × High-pass filter CAL n � � × × × × Calibration setting CAL? � � × × × × BAT? � × × × × × Battery status DOD? � × � � � × Measurement value DOF n � × × × × �(DOF0) Instantaneous value (100 ms) MAX n � × × �(MAX0) × × Maximum hold MAX? � × × � × × PEK n � × × × �(PEK0) × Peak hold PEK? � × × × � × RST × × � � � × Reset CMP n � × �(CMP0) × × × Comparator CMP? � × � × × × CMS n1 to n7 � × × × × × Comparator setting CMS? � × × × × × STS? � × × × × × Setting information

� � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � Communication with Multiple Units using SC-31M/SC-31S Using the optional SC-31M/SC-31S adapters, it is possible to connect up to 16 VM-83 units to a single computer. Connecting multiple VM-83 units (max. 16) to a computer Use SC-31M/SC-31S adapters (option) and LAN cables (generic 10BaseT cable) Maximum allowable wiring distance: 400 m Note (1) When multiple units are connected, commands can be sent either to a single unit or all units. It is not possible to send for example a command to 3 out of 5 connected units. (2) When sending commands to all units, only set- ting commands are valid. Commands for get- ting information (parameter "?") and the DOF command are invalid.

To send a command to a single unit when multiple units are connected, the same procedure as for one-on-one communication is used. 1. Verify that all connected VM-83 units are set to local mode. 2. Send the RMT1** command, where ** is the ID number of the unit to be controlled. 3. Control the specified VM-83 unit by sending commands for changing settings and getting information. 4. To switch control to another VM-83 unit, send the RMT0** command with the ID number of the currently controlled unit, to return that unit to the local mode. Then send the RMT1** command with the ID number of the new unit, and repeat the above steps. Note Before switching control to a new VM-83 unit, always return the currently controlled unit to the local mode first. If two or more units are set to remote mode, output data will be mixed up. � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � �

When sending commands to all connected units, only commands for changing settings are allowed. To address a command to all units, set all units to remote mode by sending the RMT1FF command. Note that a VM-83 that has received the RMT1FF command will not output a response to any command. 1. Verify that all connected VM-83 units are set to local mode. 2. Send the RMT1FF command to set all connected VM-83 units to remote mode (linked condition). 3. Control the VM-83 units by sending setting commands. 4. To terminate the linked condition, send the RMT0FF com- mand. Note A VM-83 that has received the RMT1FF command will switch to remote mode, regardless of the ID number. When the parameter FF was used, the VM-83 will not output a response to received commands. � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � �

(1) Noise level using accelerometer input and sensitivity 5.00 pC/(m/s2) Measurement Measurement HPF LPF Display Noise level mode range characteristics Acceleration 0.3 --- --- RMS 0.004 m/s2 Velocity 3 1 Hz --- RMS 0.1 mm/s Displacement 1 1 Hz --- RMS 0.015 mm Displacement 0.03 10 Hz --- RMS 0.0003 mm (2) Noise level examples using servo accelerometer input Accelerometer type Measurement Measurement HPF LPF Display Noise level mode range characteristics Acceleration 0.3 --- --- RMS 0.0034 m/s2 PV-85 Velocity 3 10 Hz --- RMS 0.004 mm/s Displacement 0.03 10 Hz --- RMS 0.0002 mm Acceleration 3 --- --- RMS 0.133 m/s2 PV-90B Velocity 30 10 Hz --- RMS 0.17 mm/s Displacement 0.3 10 Hz --- RMS 0.007 mm Acceleration 0.03 --- --- RMS 0.0005 m/s2 PV-87 Velocity 0.3 10 Hz --- RMS 0.0006 mm/s Displacement 0.003 10 Hz --- RMS 0.00003 mm* * The LCD can display measurement values to four digits after the decimal point.

Acceleration measurement range � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � �

� � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � �

� � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � Group Delay The VM-83 directly converts the vibration input signal from analog into digital form and performs signal processing in the digital domain, using a DSP. The signal is then reconverted to analog for the AC and DC output. For this reason, a certain delay (group delay) is introduced as shown below. Rack Mounting The VM-83 can be mounted in a rack, using the four screw holes on the bottom of the unit. � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � �

general ways outlined below. The accelerometer mounting method greatly af- fects the contact resonance frequency *. The advantages and disadvantages of various methods are described in this section. Rigid screw mounting This mounting principle assures optimum frequency re- sponse characteristics. The mounting surface should be per- fectly smooth, and the screw holes (M6) must be drilled in such a way so as not to disturb perpendicularity of the ac- celerometer. Insulation attachment mounting This mounting principle is used when electrical insulation between accelerometer and measurement object is required. The contact resonance frequency will be lower than with rigid screw mounting. Regarding the screw holes, the same precautions as for rigid screw mounting apply. Magnet attachment mounting Because the contact resonance frequency will be quite low, this principle is mainly suited for vibration measurements in the medium to low frequency range. The maximum ac- celeration that can be measured depends on the accelerom- eter mass. Rod attachment mounting Pressing the accelerometer against the measurement object with a rod is the simplest method, but it is only suitable for measurements below 500 Hz, because contact resonance frequency will be very low. This method should only be used if the other three mounting methods are not feasible.

Contact resonance occurs when the area the mounted accelerometer con- tacts the measurement object becomes temporarily deformed, causing it to act like a spring. This spring and the accelerometer mass then form a system that vibrates at a certain resonance frequency. The resonance frequency, which varies considerably depending on the mount- ing method of the accelerometer, limits the upper range of vibration frequen- cies that can be measured. The diagram below shows the relationship between mounting method and high range characteristics. This demonstrates that, besides selecting an ap- propriate mounting method, it is important to set the measurement range so that the influence of the contact resonance phenomenon is excluded. Sample chart showing the influence of accelerometer mounting method on high-range frequency characteristics

used in the VM-83. For simplification, the range is assumed to be "100" and "30", and the display characteristics setting EQ PEAK. Because the overload point of this unit is approximately three times the range full-scale point, the display range at the range "100" setting is about 300, and at the "30" setting (actually 31.6) is about 90, assuming that there is no overload in the intermediate circuits. The display resolution is 0.1 and 0.01. Therefore the possible display range is as follows: Range 100 0.1 to 300.0 30 0.01 to 90.00 The VM-83 directly feeds the raw waveform of the vibration signal to an A/D converter and then performs filter processing, rms conversion, and other func- tions using a DSP. When the number of effective digits for display decreases, display accuracy cannot be maintained. Therefore the indication UNDER ap- pears on the display when the displayed value falls below 0.5% of the full-scale point. This warns the user that the current range setting is not appropriate. To assure accurate readings, the range setting should be made so that the UNDER indication does not appear. At a level of 0.2% of the full-scale point and lower, the lowest bit level of the A/D converter is reached, so that readings will be indeterminate. At a range "30" setting, this corresponds to 0.06% of the full- scale point. This means that readings below this limit will be highly imprecise, and that the display reading may not be 0 even if the actual vibration signal is very low.

form and performs signal processing in the digital domain, using a DSP. This principle is subject to the so-called aliasing effect. An anti-aliasing filter (ana- log low-pass filter) serves to counter this effect. In the VM-83, a 5th-order filter is used for this purpose. Note that the filter has the effect shown below. In the above illustration, the shaded section represents the area where the aliasing effect is noticeable. With fs/2 as the center, the two spectrum representations look like mirror reflections of each other. The arrow (solid line) indicates a case where a signal 1.56 times the 20 kHz upper measurement limit is input (31.2 kHz). In this case, aliasing will cause a spectrum level detection of -50 dB (0.3%) at 20 kHz. � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � �

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High-pass filter Low-pass filter The above specifications are a representative example for AC output. � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � �

2000, XP and Microsoft Windows NT4.0 which allows controlling settings and measurement operation of the VM-83 from the computer, via the serial port. Measurement data downloaded from the VM-83 can be stored in text file format, allowing further processing for example using a spreadsheet pro- gram. The VM-83PB1 software also handles communication with multiple VM-83 units connected to a single computer, using the SC-31 adapter. Microsoft and Windows are trademarks or registered trademark of Microsoft U.S.A. Corporation in the U.S.A. and other countries. � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � �

For piezoelectric accelerometer (microdot connector) Maximum input charge 30000 pC (2) PREAMP 1 input For piezoelectric accelerometer via preamplifier VP-26A (7-pin female connector PRC-03) (3) PREAMP 2 input For piezoelectric accelerometer with integrated preamplifier 18 V, 2 mA drive (microdot connector) (4) SERVO input For servo accelerometer LS-10C or LS-20C (8-pin female connector) Measurement modes (1) Acceleration (ACC) m / s2 (piezoelectric accelerometer), mm / s2 (servo accelerometer) (2) Velocity (VEL) mm / s (3) Displacement (DISP) mm Measurement range Piezoelectric accelerometer - Accelerometer sensitivity 0.030 to 0.999 pC / (m / s2) Acceleration 3, 10, 30, 100, 300, 1000, 3000, 10000 m / s2 Velocity 30, 100, 300, 1000, 3000, 10000 mm / s Displacement 10, 30, 100, 300, 1000, 3000, 10000 mm (HPF 1 Hz) Displacement 3, 10, 30, 100, 300, 1000, 3000, 10000 mm (HPF 3 Hz) Displacement 0.3, 1, 3, 10, 30, 100, 300, 1000 mm (HPF 10 Hz or higher)

Acceleration 0.3, 1, 3, 10, 30, 100, 300, 1000 m/s2 Velocity 3, 10, 30, 100, 300, 1000 mm/s Displacement 1, 3, 10, 30, 100, 300, 1000 mm (HPF 1 Hz) Displacement 0.3, 1, 3, 10, 30, 100, 300, 1000 mm (HPF 3 Hz) Displacement 0.03, 0.1, 0.3, 1, 3, 10, 30, 100 mm (HPF 10 Hz or higher) - Accelerometer sensitivity 10.0 to 99.9 pC/(m/s2) Acceleration 0.03, 0.1, 0.3, 1, 3, 10, 30, 100 m/s2 Velocity 0.3, 1, 3, 10, 30, 100 mm/s Displacement 0.1, 0.3, 1, 3, 10, 30, 100 mm (HPF 1 Hz) Displacement 0.03, 0.1, 0.3, 1, 3, 10, 30, 100 mm (HPF 3 Hz) Displacement 0.003, 0.01, 0.03, 0.1, 0.3, 1, 3, 10 mm (HPF 10 Hz or higher) Servo accelerometer Acceleration 10, 30, 100, 300, 1000 m/s2 Velocity 1, 3, 10, 30, 100 mm/s Displacement 0.1, 0.3, 1, 3, 10 mm Vibration frequency range Piezoelectric accelerometer Acceleration 1 Hz to 20 kHz ±5% (AC output: 15 kHz to 20 kHz ) Velocity 1 Hz to 3 Hz ±10%, 3 Hz to 3 kHz ±5% Displacement 1 Hz to 3 Hz ±20%, 3 Hz to 500 Hz ±10% Servo accelerometer Acceleration 0.1 Hz to 100 Hz ±5% Velocity 0.1 Hz to 0.3 Hz ±10%, 0.3 Hz to 100 Hz ±5% Displacement 0.1 Hz to 0.3 Hz ±20%, 0.3 Hz to 100 Hz ±10%

LPF OFF, 100, 300, 1 k, 3 k, 10 kHz (-10% point), selectable Servo accelerometer HPF 0.1, 0.3, 1 Hz, selectable LPF 50, 100 Hz, selectable Display (detection) characteristics Effective value (RMS) True rms Equivalent peak (EQ PEAK) rms × � Equivalent peak-to-peak (EQ P-P) rms ×2 Maximum value hold Maximum display value for selected measurement mode and display characteristics is held (numeric display only). Reset key allows reset at any time. Peak value hold Peak value of acceleration waveform is held. Comparator function Level evaluation based comparator. Output activated when comparator level is exceeded - Comparator level setting: in 2% steps of full-scale value - Delay time 0 to 9 s in 1-s steps - Auto reset time 0 to 90 s in 1-s steps, ON/OFF - Comparator output open-collector output max. applied voltage: 24 V, max. drive current: 50 mA (when the impressed voltage is 24 V) 25 mA (when the impressed voltage is 12 V) 10 mA (when the impressed voltage is 5 V) buzzer output ON/OFF; LCD flashing

0 to 3.16 0 to 10 (2) 4-digit numeric display; arithmetic average of 20 instantaneous values taken at 100 ms intervals, updated every 2 seconds (3) Measurement mode, display characteristics, filter (4) Battery status; 3-segment indication Calibration (1) Accelerometer sensitivity 0.030 to 0.999, 1.00 to 9.99, 10.0 to 99.9 pC/(m/s2) Shown on display during calibration (2) Output calibration Calibration output signal for connected equipment AC Piezoelectric accelerometer 80 Hz ±2%, 2 V ±2% Servo accelerometer 1 Hz ±2%, 2 V ±2% DC 2 V ±2% � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � �

Load impedance: 10 kΩ or higher Output voltage accuracy Piezoelectric (unit electrical characteristics, 80 Hz) Velocity: range full-scale ±2% Acceleration: range full-scale ±3% Displacement: range full-scale ±5% Servo accelerometer (overall accuracy with LS-10C 1 Hz) Velocity: range full-scale ±3% Acceleration: range full-scale ±4% Displacement: range full-scale ±6% Max. output voltage: ±6 V peak (2) DC output; full-scale 2 V, output impedance 600 Ω, BNC connector Load impedance: 10 kΩ or higher Output voltage accuracy Piezoelectric (unit electrical characteristics, 80 Hz) Velocity: range full-scale ±2% Acceleration: range full-scale ±3% Displacement: range full-scale ±5% Max. output voltage: 6 V (4.2 V when rms display is selected)

Measurement Measurement HPF LPF Display Noise level mode range characteristics Acceleration 0.3 --- --- RMS 0.004 m/s2 Velocity 3 1 Hz --- RMS 0.1 mm/s Displacement 1 1 Hz --- RMS 0.015 mm Displacement 0.03 10 Hz --- RMS 0.0003 mm (2) Noise level example with piezoelectric accelerometer Accelerometer type Measurement Measurement HPF LPF Display Noise level mode range characteristics Acceleration 0.3 --- --- RMS 0.0034 m/s2 PV-85 Velocity 3 10 Hz --- RMS 0.004 mm/s Displacement 0.03 10 Hz --- RMS 0.0002 mm Acceleration 3 --- --- RMS 0.133 m/s2 PV-90B Velocity 30 10 Hz --- RMS 0.17 mm/s Displacement 0.3 10 Hz --- RMS 0.007 mm Acceleration 0.03 --- --- RMS 0.0005 m/s2 PV-87 Velocity 0.3 10 Hz --- RMS 0.0006 mm/s Displacement 0.003 10 Hz --- RMS 0.00003 mm* * The LCD can display measurement values to four digits after the decimal point.

Acceleration measurement range � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � �

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-10 to +50°C, 20 to 90% RH (no condensation) Power requirements IEC R14 (size C) batteries(×4) or AC adapter (option) Current consumption approx. 190 mA (6 V DC) (*1) approx. 60 mA (using AC adapter) (*1, *2) Battery life for continuousoperation Alkaline batteries (approx. 20 hours) (*1) Manganese batteries (approx. 9 hours) (*1) *1 Measurement conditions: 20°C, 50% RH, power supply voltage 6 V, Accelerometer input, ACC, backlight off, communication off, switch LEDs off *2 Measurement conditions: Current consumption measured with AC adapter at 100 V AC. Dimensions 171 (H) × 120 (W) × 234 (D) mm Weight Approx. 1.8 kg Interface Serial interface For data output and remote control 5WKR4030 interface cable (option) 9-pin D-sub male connector Half-duplex communication with protocol Transfer rate 9600, 19200 bps SC-31M/SC-31S (option) allow connection of multiple VM-83 units (max.16) to one computer. Maximum allowable wiring distance: 400 m Printer output For data output to printer (CP-10, CP-11, DPU-414) www.64817.com