Sekonic ST-50A Operation Manual

Operation Manual Thank you for purchasing this Microprocessor-Based Hygro-Thermograph. The essential information for the correct oper ation of the Hygro-Thermograph is described in this manual. Please be sure to read this manual carefully before using the Hygro- Thermograph. CE Approved

Safety Information This is a Class B product based on the standard of the Voluntary Control Council for Interfer- ence from Information Technology Equipment (VCCI). If this is used near a radio or television receiver in a domestic environment, it may cause radio interference. Install and use the equip- ment according to the instruction manual. ● Pictorial Symbols The following warnings and cautions are intended to prevent you and other people from being injured and to prevent properties from being damaged. Please be sure to obsreve them to ensure your safe use of the instrument. Various pictorial symbols are used in this manual. Please peruse the following descrip- tions before proceeding to the text. ● Examples of Pictorial Symbols Action liable to cause smoking or fire. Action liable to get an electric shock. Action prohibited. Prohibition of disassembling or modifying actions. Instruction to unplug the instrument for safety. 　WARNING Indicates a potentially hazardous situation that could lead the operator to death or setious injury . 　CAUTION Indicates a potentially hazardous situation that could lead the operatoe to slight injury or could cause physical damage.

WARNING ● Precautions concerning AC adapter • When connecting the AC adapter to the instrument and a plug receptacle, be sure to turn the power switch OFF (【 】). • When removing the inserted plug from the instrument or from the plug receptacle, never pull the cord. • Never use any AC adapter other than the one provided by us.(Refer to Chapter12) ● Precautions concerning battery • Do not charge, short-circuit, disassemble, heat or throw battery in fire. • Before replacing the batteries, be sure to turn the power switch OFF (【 】). • Be sure to check the direction of the positive and negative poles carefully before inserting the batteries. • Do not mix new and old batteries, or other types of batteries. • When not using the instrument for a prolonged period, remove the batteries from the instrument. • If leakage occurs, wipe out the fluid from the battery box, then insert new batteries. ● Using the instrument in abnormal situations may result in fire or getting an electric shock. If any abnormal odor, sound, or smoke comes from the instrument, immediately turn off the power switch, then remove the batteries and the AC adapter both from the instrument and from the plug receptacle. Make sure that the smoke has stopped coming out of the instrument, then contact the distributor. Never repair it by yourself. ● Never modify or disassemble the instrument. Otherwise, a fire may be caused or you may get an electric shock. ● Do not modify or disassemble the AC adapter. Otherwise, a fire may be caused or you may get an electric shock. ● If you drop the insturment or cause damage to the cover, immediately turn off the power switch, remove the batteries and the AC adapter both from the instrument and from the plug receptacle, then contact the distributor. ● If foreign objects or water should enter the instrument, immediately turn the power switch OFF(【 】), remove the batteries and the AC adapter both from the instrument and from the plug receptacle, then contact the distributor. If you keep operating the instrument, a fire may be caused or you may get an electric shock. ● Never use the instrument near explosive or inflammable gases. ● Precautions concerning the instrument • Never drop any objects like metals and inflammables in the opening. • Keep the instrument away from dust, water or oil splashes. CAUTION ● When not using the instrument, remove the AC adapter both from the instrument and from the plug receptacle. ● Be sure to close all the covers before carrying the instrument, otherwise it may be damaged. ● Be sure to remove the AC adapter both from the instrument and from the plug receptacle before carrying it. ● Do not remove the sensor connector from the instrument unless attaching or detaching the extension cable (option) or checking the instrument for maintenance. Otherwise, it will result in imperfect contact or disconnection. ● Avoid the following environments to use the instrument, otherwise machine trouble may occur. ①Place under high radiation heat (direct sunlight) ②Place under mechanical vibration ③Near the source of electromagnetic field ④Place under influence of dust or lamp black ⑤Place easily affected by water or moisture ⑥Environment under influence of organic gas, inorganic gas or salt ● For maintenance, use a dry soft cloth and wipe the instrument lightly. Do not use thinner, benzine or other volatile liquid and a wet cloth, otherwise the instrument may be discolored or deformed. ● SD Card Usage Precautions. ①Do not use an SD I/O card (such as a wireless LAN card or communication card). This can cause malfunctions or damage to the ST-50M or the card. ②Before removing the SD card, set the [SD Card Record] switch to OFF, and check that the [MEMORY] indicator no longer appears. Removing the SD card while the [MEMORY] indicator is fully lit or blinking can corrupt the data. ③Do not pull forcefully when removing the SD card. This could damage the ST-50M or the SD card. ④If using a Mini SD card or Micro SD card, an SD card conversion adapter is required. ⑤SDHC cards, Mini SDHC cards, and Micro SDHC cards cannot be used. ⑥Use SD cards with a size from 128 MB to 2 GB and compliant with the SD standards. However, operation is not guaranteed with all SD cards that satisfy this condition. For a list of the cards where operation has been confirmed, please refer to the Sekonic Product Guide web page ("http://www.sekonic.co.jp/English/index.html). Safety guarantee If the instrument is used in a manner not specified by the manufacturer, the protection provided by theinstrument may be impaired.

Check Before Use This instrument has passed our severe inspection, however, the following points should be confirmed before use: ① Check the appearance of the instrument carefully to make sure that the instrument is free from any damage. ② Check if all accessories are provided as specified. The detail of the accessories is as follows: If you find anything damaged or missing, please contact us or the distributor from whom you purchased the instrument. 7 9 Contents Safety Information Check Before Use Chapter 1. Machine Call-outs ................................ 7 Chapter 2. Installation............................................ 9 Chapter 3. Preparation for Measurement 　■ Setting (Replacing) chart paper ......................... 10 　■ Inserting (Replacing) dry batteries ..................... 11 　■ Time to replace .................................................. 12 　■ Setting (Replacing) recording pens ................... 12 　■ Pen replacement mode...................................... 13 　■ Connecting AC adapter...................................... 13 　■ Connecting extension cable............................... 13 　■ Inserting the SD card(ST-50M only) .................. 14 　■ Removing the SD card(ST-50M only) ................ 14 Chapter 4. Basic Operation 4-1. To start and stop recording ................................ 15 4-2. To change chart speed ....................................... 15 4-3. To select Celsius or Fahrenheit .......................... 15 4-4. Power saving mode ........................................... 15 Chapter 5. SD Card Writing Function (ST-50M Only) 5-1. Setting temperature recording range ................. 16 5-2. Starting and Stopping Data Writing to SD Card ..... 17 5-3. Changing the SD Card Writing Interval .............. 17 5-4. Changing the Date ............................................. 18 5-5. Changing the Time ............................................. 18 5-6. Initializing the SD Card ...................................... 19 Chapter 6. Setting Recordeing Range 6-1. Setting temperature recording range ................. 20 　■ Setting range 0-50°C (30-130°F) ....................... 20 　■ Setting recording range manually ...................... 20 6-2. Setting humidity recording range ....................... 21 * The life of the attached batteries may be shorter than the specified period because they have already been used for trials. We recommend using new ones (size D, alkaline) when you operate the instrument for prac- tical use. No. Parts Names Q’ty Remarks 1 Temperature recording pen 1 Red 2 Humidity recording pen 1 Blue 3 Chart paper 1 Z-folded plain paper 4 Dry battery 4 Used for trial 5 Operation Manual 1

Chapter 7. Setting Alarm 7-1. Function overview .............................................. 21 7-2. Setting temperature alarm ................................. 22 7-3. Setting humidity alarm ....................................... 22 7-4. To initialize the alarm ......................................... 22 Chapter 8. Display indicators (ST-50M only) ........ 23 8-1. SD card recording cycle indicator ...................... 24 8-2. Date indicator ..................................................... 24 8-3. Time indicator ..................................................... 24 8-4. Normal measurement screen (SD card recordable days indicator) ............... 24 8-5. Temperature recording range setting indicator .......... 24 8-6. Humidity recording range setting indicator......... 24 Chapter 9. Useful Function 9-1. Pen trace ofset compensation (POC) ............... 25 　■ Function overview .............................................. 25 　■ Setting POC ....................................................... 25 9-2. Marking function ................................................. 25 9-3. Indicating dew point temperature and absolute humidity ............. 25 Chapter 10. Sensor Calibtarion 10-1. Setting humidity alarm ..................................... 26 　■ To check the calibration status ........................... 26 10-2. Calibrating temperature sensor ........................ 26 10-3. Calibrating humidity sensor .............................. 27 10-4. 2-point calibration of humidity sensoror ........... 27 　■ Calibration at 33% RH ....................................... 27 　■ Calibration at 75% RH ....................................... 27 10-5. To initialize the calibrated value ....................... 28 Chapter 11. Pen Position Adjustment 11-1. Periodic inspection ........................................... 28 11-2. To check the adjustment status ........................ 28 11-3. Adjusting temperature recording pen position ..... 29 11-4. Adjusting humidity recording pen position ........ 29 11-5. To initialize the adjusted value ......................... 29 Chapter 12. Maintenance 12-1. SFunction overview.......................................... 30 12-2. Replacement of sensor (assembly) ................. 30 12-3. Replacing the clock backup battery ................. 30 Chapter 13. Data Files (ST-50M Only) 13-1. File Names ....................................................... 32 13-2. Data Content .................................................... 32 Chapter 14. Troubleshooting 14-1. Troubleshooting tips ......................................... 33 14-2. List of Error Messages ..................................... 33 Chapter 15. Specifications.................................... 35

Chapter 1. Machine Call-outs [LCD Screen] 『　』 indicates the current indication on the LCD. ① 『MODE 』 Comes on when you execute any setting. ② 『ALARM 』 Comes on when you set or check the alarm. ③ 『DATE 』(ST-50M only) Comes on when you set or confirming the date. ④ 『TIME 』(ST-50M only) Comes on when setting or confirming the time. ⑤ 『MEMORY 』(ST-50M only) Comes on when writing data to the SD card and blinks during SD card recognition, selecting SD card initializa- tion, and while initialization is in progress. ⑥ Battery life indicator Indicates the battery life. (Not shown when the AC adapt- er is used.) ⑦ 『AC 』 Comes on when the AC adapter is used. ⑧ Temperature indicator 『D.P. 』 Blinks when a dew point temperature is displayed. 『23.1 』 Indicates the present temperature, (Celsius, Fahrenheit, dew point temperature), various set items and set points. 『H』, 『L』 Comes on when the alarm is set and blinks when the set alarm is given. 『°C 』, 『°F 』 Indicates the unit (Celsius or Fahrenheit) of the present temperature. ⑨ Humidity indicator 『71.0 』 Indicates the present humidity (relative humidity or abso- lute humidity), various set items and set points. 『%』, 『g/m 3』 Indicates the unit of the present (relative or absolute) humidity. 『H』, 『L』 Comes on when an alarm is set and blinks when an alarm has occurred. [Front view] Temperature recording pen Humidity recording pen Sensor LCD LCD Screen Chart cassette Control panel Front door Control panel door Sensor terminal Alarm output terminal SD SD card AC AC adapter terminal [Side view] 〔LCD 〕 [LCD Screen] ① ② ⑩ ⑧ ⑫ ⑬ ⑪ ③ ④ ⑤ ⑥ ⑦ l cc _^qq=K=p^s b bkqbo abt =ml f kq ^_pl i Ker j f af qv j ^oh l k ^i ^oj l k l k [Control panel] DIP switch cr k` qf l kEpqJ RMj F pmbbaLo^kdbEpqJ RM^F

⑩ 『CAL. 』 Comes on when the sensor is calibrated or when the pen position is adjusted. ⑪ 『CLEAR 』 Comes on or blinks when clearing any set point. ⑫ 『INTERVAL 』(ST-50M only) Comes on when setting the SD card writing cycle. ⑬ Chart speed/SD card information indicator 『REMAIN 』(ST-50M only) Comes on when displaying the remaining space on the SD card. 『SPEED 』, 『mm/h』 Comes on when setting and displaying the chart speed. 『' 』(ST-50M only) Comes on when setting and displaying the date. 『10』 Displays the current chart speed, various setting items, and setting values. 『s』, 『m』, 『h』, 『D』, 『M』(ST-50M only) Displays the current SD card recording cycle and the units of the available time left in the SD card (seconds, minutes, hours, days, months). [Control Panel] 【　】 indicates a switch or a key. ① 【POWER 】 Switch Turns the power supply ON/OFF ( 【 】), or starts/stops recording. ② 【BATT. SAVE 】 Switch Reduces consumption of the batteries. ③ 【FUNCTION 】 Key(ST-50M) / 【SPEED/RANGE 】Key(ST-50A) This is used to change the chart speed, SD card writing cycle (ST-50M only), writing range, and pen adjustment settings and to initialize the SD card (ST-50M only) *【FUNCTION 】Key = 【SPEED/RANGE 】Key in ST-50A. ④ 【ALARM 】 Key Sets or checks the alarm, or changes the sensor calibra- tion setting. ⑤ 【▲】, 【▼】 Key Used to switch the displayed information (ST-50M only) and change the various settings. ⑥ 【ENTER/DEW POINT/ABSOL. HUMIDITY 】 Key Registers the various settings, or displays the dew point temperature or absolute humidity. ⑦ 【MARK 】 Key Leaves a mark on the chart paper using a recording pen. ⑧ DIP Switch Sets the pen trace ofset compensation (POC), selects Celsius or Fahrenheit, and sets the recording range. ⑨ SD Card Record Switch(ST-50M only) Used when saving measurement data to the SD card. CAUTION Before opening the Control panel door, be sure to open the Front door first.

Be sure to check the following points when installing the instrument. • The inclination of the body should fall within +/- 10 de - grees both against the horizontal and the vertical (when hanged on the wall.) • The instrument should always stand as shown in the fig - ure. If laid down, it may not work normally. • When hanging it on the wall, fix the two screws 230 mm / 9.06 in. apart from each other. CAUTION The instrument weighs 2.9 kg approx. (including bat- teries.) When hanging it, be sure to use the wall and screws strong enough to hold 10 kg weight. Chapter 2. Installation 230 230mm/abt. 9.06 in. Holes for hanging on wall (example) Material of screw: Steel 3mm (abt. 0.12 in.) 5mm (abt. 0.20 in.) 7mm (abt. 0.28 in.) 15mm (abt. 0.59 in.) 3mm Approx. 5mm Approx. 15mm Approx. Wall ø 5-7mm ø 3mm

� Setting (Replacing) chart paper ① While pressing the stoppers on both sides of the chart cassette, pull forward and remove it from the body. CAUTION • When replacing the chart paper, make sure that the recording pens are raised. If not, this procedure may cause damage to the instrument. • See “Setting (Replacing) recording pens” in this manual if the pens need to be raised. Chapter 3. Preparation for Measurement ③ Release the chart holders of the chart cassette, raising the rear one (silver metal) and pulling down the front one (transparent plastic), then insert the chart paper as the arrow shows in the figure. CAUTION • Set the chart paper so that it is fed to the front. Set- ting it in the opposite direction may cause the ma- chine trouble. • Set the chart paper so that the square holes come to the left side and the rectangular holes come to the right side. CAUTION Be sure to set the chart paper in the correct direc tion. ② Fan the chart paper carefully before setting. ④ Pull out the end of the chart paper approx. 20 cm/7.87 in. (3 or 4 teeth) and set it to the drum so that the teeth of the sprocket wheel are properly engaged in the holes on both sides of the chart paper. Stopper チャート紙 Chart paper Drum Chart holders Chart paper チャート紙 Chart paper

� Inserting (Replacing) dry batteries ① Turn OFF ( 【 】) the power switch. ② Remove the battery cover on the rear side of the body. ③ Set four Size D batteries (LR20) in the battery case according to the polarity indication inside the case. ④ Return the battery cover. CAUTION • When using the AC adapter, be sure to turn OFF (【 】) the power switch. • Do not use rechargeable batteries. ⑤ Make sure that the chart paper is not raised from the drum and close both the rear chart holder (silver matal) and the front chart holder (transparent plastic). ⑥ Turn the chart feed dial 2 or 3 times to make sure that the chart paper is fed properly. At this time, check if the chart paper is properly folded in the chart cassette. ⑦ Place the chart cassette in the body, fit the protrusions to the grooves of the body and push it in the arrow direction until it clicks in place. Make sure that it is fixed securely. Chart holders Chart paper Drum ２、 Turn it 2 or 3 times. Chart feed dial Chart cassette Protrusions Battery cover 4 Size D batteries Press

温度記録ペン（赤色） Temperature recording pen (Red) 湿度記録ペン（青色） Humidity recording pen (Blue) ペンホルダ Penholders � Time to replace The life of the batteries loaded in the instrument is indicat- ed in the upper right corner of the LCD screen. The indica- tor will change as follows: CAUTION • When the batteries run short, the bat- tery life indicator will start blinking. • When the AC adapter is used, the battery life indicator will not appear. • Data is not saved to the SD card when the battery life indicator is blink- ing. • When the instrument is used at low temperature, the battery will run short quickly. Use the AC adapter (Option) in such an environment. • If the remaining battery level be - comes low, the battery level indicator may show an extremely low level when the power is turned on or when the pen is moved.In this case, a reset may be applied, or writing to the SD card may not be performed. Please be aware that this is not a malfunc- tion. � Setting (Replacing) recording pens ① Turn OFF ( 【 】) the power switch. ② Raise the penholder lightly in direction of arrow. ③ Remove the pen cap, and insert each pens into pen- holders firmly. Have the pen chip reach the chart paper slowly. CAUTION • If the penholders cannot be moved easily in such a case as overlapping each other, see the following paragraph “Pen replacement mode.” • Do not move the penholder forcibly from side to side, or do not press the pen tip hard to the chart paper. If you do so, the instrument may be damaged. • When removing the pen from the penholder, be sure to hold the sides of the tip of the pen. The battery voltage is in the normal state. The batteries should be replaced. Penholders

� Pen replacement mode ① Turn ON the power switch, then press the 【▼】 and 【EN- TER 】 keys together. ② The 『MODE 』 indication appears and 『PEn 』 blinks in the LCD. ③ The 『PEn 』 will stop blinking when the temperature recording pen and the humidity recording pen get posi- tioned on the chart paper, 25 mm from the left side and 25 mm from the right side, respectively. ④ See the paragraph “Setting (Replacing) pen” to replace the pen. ⑤ To return to the normal measurement screen, press the 【▼】 and 【ENTER 】 keys together again. � Connecting AC adapter To use the AC adapter, connect it to the AC adapter ter- minal on the side panel of the body. While the AC adapter is used, the 『AC 』 indication is displayed as shown in the figure. If it is used together with battery, the priority will be given to the AC adapter. In this case, the battery will be a backup if the power supply is cut of due to a power failure. CAUTION When the AC adapter and the battery are used togeth- er, disconnect the AC adapter periodically to check the battery life on the LCD screen. � Connecting extension cable To separate the sensor from the body for remote measure- ment, use the extension cable. Three types of cables, 5m, 20m and 50m long are available. ① Remove the clamp for the sensor cord from the body. ② Disconnect the sensor connector, then connect the ex- tension cable. ③ Fix the extension cable with the clamp. CAUTION Before connecting the extension cable, be sure to turn OFF (【 】) the power switch. Sensor Extension cable Clamp Sensor connector

� Inserting the SD card (ST-50M only) ① Set the [SD Card Record] switch to OFF. ② Insert the SD card until it clicks into place in the SD card slot. ③ 【MEMORY 】 blinks for a short time on the LCD. This indi- cates that the information in the SD card is being loaded. ④ When blinking of [MEMORY] on the LCD is finished, data can be written to the SD card. ⑤ To start writing to the SD card, set the [SD Card Record] switch to ON. � Removing the SD card (ST-50M only) ① Set the [SD Card Record] switch to OFF. ② Check that 【MEMORY 】 no longer appears on the LCD. ③ Gently press in the SD card inserted into the SD slot with your finger until the SD card makes a clicking sound. The SD can now be removed. Sensor terminal Alarm output terminal AC adapter terminal [Side view]

CAUTION Be sure to keep the DIP swit ch No. 5 to No. 8 OFF state. Chapter 4. Basic Operation 4-1. To start and stop recording Turn ON the power switch. Wait 4.5 minutes or less till the two pens get their positions to start recording. To stop re- cording, turn OFF ( 【 】) the power switch. 4-2. To change chart speed ① Press the 【FUNCTION 】 key once while the normal measurement screen is displayed. The 『MODE 』 and 『SPEED 』 indications will appear on the screen, with the chart speed displayed, blinking. ② Select the desired speed using the 【▲】 or 【▼】 key, then press the 【ENTER 】 key. The chart speed indi- cation will stop blinking to show the setting has been completed. ③ To return to the normal measurement screen, press the 【FUNCTION 】 key. 4-3. To select Celsius or Fahrenheit You can select Celsius (°C) or Fahr- enheit (°F) by turning the DIP switch 1 OFF or ON. Celsius is initially se - lected. 4-4. Power saving mode To reduce the power consumption of the batteries, turn ON the 【BATT. SAVE 】 switch. Reference When the 【BATT. SAVE 】 switch is turned ON, the chart speed will be set to 2.5mm/h and the battery life will be as long as about 4 months (ST-50M) / 6 months (ST- 50A). We recommend you to select this mode in case of unattended operation for a long time. Reference ・The relation between available chart speeds and re- cording periods is as shown below: Chart speed Recording period 20mm (abt. 0.79 in.) /h 20 days approx. 10mm (abt. 0.39 in.) /h 1.5 months approx. 5mm (abt. 0.20 in.) /h 3 months approx. 2.5mm (abt. 0.10 in.) /h 6 months approx. 華氏（ Fahrenheit ( °F) ON 1 2 3 ・The display returns to the measurement screen if no operation isperformed within one minute. CAUTION When using with batteries, if the remaining battery level be- comes low, the battery level indicator may show an extremely low level when the power is turne d on or when the pen is moved. In this case, a reset may be applied, or writing to the SD card may not be performed. Please be aware that this is not a mal- function.

CAUTION ・Do not use an SD I/O card (such as a wireless LAN card or communication card). This can cause malfunctions or damage to the ST-50M or the card. ・Before removing the SD card, set the 【SD Card Record 】 switch to OFF, and check that the 【MEMORY 】 indicator no longer appears. Removing the SD card while the 【MEMORY 】 indicator is fully lit or blinking can corrupt the data. ・Do not pull forcefully when removing the SD card. This could damage the ST-50M or the SD card. ・Use SD cards with a size from 128 MB to 2 GB and compliant with the SD standards. However, operation is not guaranteed with all SD cards that satisfy this condi- tion. For a list of the cards where operation has been confrmed, please refer to the Sekonic Product Guide web page. ・If using a Mini SD card or Micro SD card, an SD card conversion adapter is required. ・SDHC cards, Mini SDHC cards, and Micro SDHC cards cannot be used. ・SD cards are sold separately. Purchase a commercially- available SD card for use. ・The operating temperature of the SD card varies de- pending on themanufacturer and model, and so please use an SD card that is suitable for the actual operating environment. Example: SD cards for the 0 to 55� or -25 to 85� tem- perature range. ・A separate PC is required for loading the data written to the SD card. The personal computer must have a built-in SD card slot or SD card reader. ・If the SD card cannot be read by the ST-50M, use the ST-50M to initialize the SD card. Do not initialize the SD card using a PC. ・The graph data viewer application is for Windows ® only. For customers who are using Macintosh ® or another OS, please obtain a spreadsheet software program capable of loading CSV files. Chapter 5. SD Card Writing Function (ST-50M Only) 5-1. SD Card Writing Function In addition to recording on chart paper, the ST-50M also supports the writing of data to an SD card. A built-in clock is included for recording the measurement date and time data. The ST-50M can write data to commercially-available SD cards so that the data can be loaded to a PC using an SD card slot or SD card reader. The data written to an SD card is saved in CSV format, and this enables it to be loaded directly into Microsoft ® Excel and other applications. A graph data viewer application (for Windows ® XP and Vista) is available for download from the Sekonic Product Guide web page (http://www.sekonic.co.jp/English/index.html) for enabling the viewing and printing of graphs and data for customers who do not have spreadsheet software.

5-2. Starting and Stopping Data Writing to SD Card Insert the SD card and set the 【SD Card Write 】 switch to ON. The MEMORY indicator turns on, and writing to the SD card is started. To stop data writing, set the [SD Card Write] switch to OFF. CAUTION ・The error 700 occurs if the 【SD Card Write】 switch is set to ON without inserting an SD card. ・Set the write-protect tab on the SD card to OFF. If it is left at ON, the error 702 occurs. ・When the amount of available space on the SD card be- comes 0, the error 704 occurs. Insert a new SD card. ・If the amount of available space on the SD card is 7 days or less, 【REMAIN】 blinks. Obtain a new SD card. ・Data is not saved to the SD card when the battery life indicator is blinking. ・When the battery level indicator changes from fully lit to flashing, or vice-versa, data may not be written to the SD card in some cases. Please be aware that this is not a malfunction. ・When using with batteries, if the remaining battery level becomes low, the battery level indicator may show an extremely low level when the power is turned on or when the pen is moved. In this case, a reset may be applied, or writing to the SD card may not be performed. Please be aware that this is not a malfunction. 5-3. Changing the SD Card Writing Interval ① Pressing the 【FUNCTION 】 key twice in the normal mea- surementscreen shows 【MODE 】, 【MEMORY 】, and 【IN- TERVAL 】, and the SD card writing interval begins to blink. ② Use the 【▲】 and 【▼】 keys to select the SD card writing interval, and then press the 【ENTER 】 key to change the indicator from blinking to fully lit and register the setting. ③ To return to the normal measurement screen, press the 【FUNCTION 】 key. CAUTION ・The maximum number of files that can be stored on a single SD card is 512. This is equivalent to about 16 months of data. ・Note that the maximum number of files that can be stored will be reduced if folders or files are created on the SD card by a personal computer or other device other than this instrument. Reference ・The available SD card record intervals and record times are as shown below. SD card record intervals SD card size 128MB 256～ 2GB 1min 10months 16months 1.5min 14months 3min 16months 5min 6min 10min 12min 15min 30min 60min ・The display returns to the measurement screen if no operation is performed within one minute.

Reference ・The display returns to the measurement screen if no operation is performed within one minute. Reference ・When the time setting is registered, the seconds are reset to 0. ・The display returns to the measurement screen if no op - eration is performed within one minute. 5-4. Changing the Date ① Pressing the 【FUNCTION 】 key three times in the normal measurement screen shows 【MODE 】, 【DATE 】, and the year, month, and day. The year is blinking. ② Use the 【▲】 and 【▼】 keys to change the year, and then press the 【ENTER 】 key to change the blinking from the year to the month. ③ Use the 【▲】 and 【▼】 keys to change the month, and then press the 【ENTER 】 key to change the blinking from the month to the day. ④ Use the 【▲】 and 【▼】 keys to change the day, and then press the 【ENTER 】 key to change the indicator from blinking to fully lit and register the setting. ⑤ To return to the normal measurement screen, press the 【FUNCTION 】 key. 5-5. Changing the Time ① Pressing the 【FUNCTION 】 key four times in the normal measurement screen shows 【MODE 】, 【TIME 】, and the hours and minutes. The hours are blinking. ② Use the 【▲】 and 【▼】 keys to change the hour, and then press the 【ENTER 】 key to change the blinking from the hour to the minute. ③ Use the 【▲】 and 【▼】 keys to change the minute, and then press the 【ENTER 】 key to change the indicator from blinking to fully lit and register the setting. ④ To return to the normal measurement screen, press the 【FUNCTION 】 key. CAUTION ・The clock of this instrument is set to Japan Standard Time. Before using for the first time, the time must be set for your region. ・Automatic correction for summer time (daylight savings time) is not supported.

CAUTION ・The SD card initialization screen will not be displayed if the SD card is not inserted, if the [SD Card Write] switch is set to ON, or write-protect tab on the SD card is set to ON,or the battery level indicator is flashing. ・During initialization of the SD card, do not remove the SD card or turn this instrument OFF. This could damage the SD card. ・For some SD card types and sizes, initialization can take an extended time. This is not a malfunction. ・The initialization process deletes all the data files on the SD card. To delete a portion of the data files only, use a PC to delete the files. ・When initializing the SD card , usage of new batteries or an AC adapter is recommended. 5-6. Initializing the SD Card The initialization process deletes all the data files on the SD card. ① If the 【SD Card Write 】 switch is set to ON, set it to OFF. ② Pressing the 【FUNCTION 】 key five times in the normal measurement screen shows 【MODE 】, 【MEMORY 】, and 【CLEAR 】. ③ Press the 【ENTER 】 key to change the 【CLEAR 】 indica- tor from fully lit to blinking. ④ Pressing the 【ENTER 】 key and the 【▼】 key at the same time changes the 【MEMORY 】 indicator from fully lit to blinking and starts initialization of the SD card. ⑤ When initialization of the SD card is completed, the blink- ing changes to fully lit, and "End" is displayed. ⑥ To return to the normal measurement screen, press the 【FUNCTION 】 key. Reference ・The display returns to the measurement screen if no operation is performed within one minute. This does not apply when initialization of the SD card is in prog - ress.

【▲】/【▼】 Chapter 6. Setting Recordeing Range 6-1. Setting temperature recording range The temperature recording range can be set by changing over the DIP switches. CAUTION Before changing over the DIP switch, be sure to turn OFF ( 【 】) the power switch. � Setting range 0-50°C (30-130°F) ① Turn OFF ( 【 】) the power switch, then turn ON the DIP switch No. 3, and turn OFF the No. 4. ② When the power switch is turned ON, temperature will be recorded in the range from 0 to 50°C or 30 to 130°F. � Setting recording range manually ① Turn OFF ( 【 】) the power switch, turn ON the DIP switches No. 3 and No. 4, and then turn the power switch ON again. ② Press the 【FUNCTION 】 key five times (Six times when the SD card is inserted and the [SD Card Record] switch is set to OFF) while the normal measurement screen is displayed. 『MODE 』 and 『r1』 will appear and the present central temperature of the chart will blink on the left side. 『- -』 will blink instead if the recording range has not been changed from the initial setting. (-20 to 80 °C or 0 to 170 °F) ③ Change the temperature to be recorded in the center of the chart paper with the 【▲】 or 【▼】 key, then press the 【ENTER 】 key. The central temperature will stop blinking to show the setting has been completed. ④ Then, the present recording range will blink on the right side of the screen. ⑤ Set the recording range 10 (+ / -10°C) or 25 (+ / -25°C) in Celsius or 25 (+ / -25°F) or 50 (+ / -50°F) in Fahrenheit with the 【▲】 or 【▼】 key, then press the 【ENTER 】 key. The recording range will stop blinking to show that set- ting has been completed. Reference If this setting is not required, press the 【FUNCTION】 key twice to return to the normal display. ON 3 4 ON 3 4 ON 3 4 Sett ing Temperature Record ing Range w ith DIP Sw itch -20～80� -20-80 °C or 0-170 °F (humidity range 0-100%) 0 ～ 50� 0-50 °C or 30-130 °F (humidity range 0-100%) Manual setting

6-2. Setting humidity recording range ① Before setting, make sure that the DIP switches No. 3 and No. 4 are turned ON. ② Press the 【FUNCTION 】 key six times (Seven times when the SD card is inserted and the [SD Card Re- cord] switch is set to OFF) while the normal mea- surement screen is displayed. 『MODE 』 and 『r2』 will appear and the present central humidity of the chart will blink on the left side. 『- -』 will blink instead if the recording range has not been changed from the initial setting. (0 to 100% RH) ③ Change the humidity to be recorded in the center of the chart paper with the 【▲】 or 【▼】 key, then press the 【ENTER 】 key. The central humidity will stop blink- ing to show the setting has been completed. ④ Then, the present recording range will blink on the right side of the screen. ⑤ Set the recording range 10 (+ / -10%) or 25 (+ / -25%) from the central humidity with the 【▲】 or 【▼】 key, then press the 【ENTER 】 key. The recording range will stop blinking to show that setting has been com- pleted. Reference If this setting is not required, press the 【FUNCTION 】 key once to return to the normal display. FUNC- 7-1. Function overview Set the alarm for the abnormal value to inform you when measured, with the 『H』 or 『L』 indicator blinking in the LCD. Reference If the alarm has been set for 30.0 °C / 50.0 °F (50.0 %) as the upper limit and the measured value is 30.0 °C / 50.0 °F (50.0 %) or higher, the 『H』 indicator will appear and start blinking. If the current value becomes 29.5 °C / 49.5 °F (49.0 %) or lower, 『H』 will go out. Also, if the same value has been set as the lower limit and the measured value is 30.0 °C / 50.0 °F (50.0 %) or lower, the 『L』 indicator will appear and start blinking. If the current value becomes 30.5 °C / 50.5 °F (51.0 %) or higher, 『L』will go out. (The hysteresis is 0.5°C or 0.5 °F in temperature and is 1.0% RH in humidity.) Chapter 7. Setting Alarm

【ALARM】 『MODE』 【ENTER】 【ALARM】 7-2. Setting temperature alarm ① Press the 【ALARM 】 key once while the normal mea- surement screen is displayed. 『MODE 』 and 『ALARM 』 will appear. When the alarm is already set, H and / or L will also be displayed. ② Press the 【ALARM 】 key once again. 『A1』 and 『H』 will be on the display, with the present set point (or -- °C/°F in initial state) blinking. ③ Set the desired upper limit of the temperature with the 【▲】 or 【▼】 key, then press the 【ENTER 】 key. The set point will stop blinking to show the setting has been completed. The indication 『- -』 means that no value has been set. ④ Press the 【ALARM 】 key once again. 『A2』 and 『L』 will be on the display, with the present set point (or -- °C/°F in initial state) blinking. ⑤ Set the desired lower limit of the temperature with the 【▲】 or 【▼】 key, then press the 【ENTER 】 key. The set point will stop blinking to show the setting has been completed. The indication 『- -』 means that no value has been set. Reference To exit this mode after setting the temperature alarm, press the 【ALARM 】 key four times. The normal mean- surement screen will be restored. 7-3. Setting humidity alarm ① After setting the lower limit of the temperature, press the 【ALARM 】 key once. 『A3』 and 『H』 will be on the display, with the present set point (or -- % in initial state) blinking. ② Set the desired upper limit of the humidity with the 【▲】 or 【▼】 key, then press the 【ENTER 】 key. The set point will stop blinking to show the setting has been complet- ed. The indication 『- -』 means that no value has been set. ③ Press the 【ALARM 】 key once again. 『A4』 and 『L』 will be on the display, with the present set point (or -- % in initial state) blinking. ④ Set the desired lower limit of the humidity with the 【▲】 or 【▼】 key, then press the 【ENTER 】 key. The set point will stop blinking to show the setting has been complet- ed. The indication 『- -』 means that no value has been set. 7-4. To initialize the alarm The alarm setting can be initialized (cleared). Skip this paragraph, if not required. ① After setting the lower limit of the humidity, press the 【ALARM 】 key once. The 【CLEAR 】 indicator will appear and start blinking. ② Press the 【▼】 and 【ENTER 】 keys together to initialize (clear) the alarm setting. Note that the 『A5』 indicator will change to 『A0』. To return to the normal measure- ment screen, press the 【ALARM 】 key six times.

Chapter 8. Display indicators (ST-50M only) In the ST-50M, the 【▲】 and 【▼】keys can be pressed from the normal measurement screen to change the various dis- play indicators. Normal measurement (chart speed screen) Press【▼】key Press【▲】key Press【▼】key Press【▲】key Press【▼】key Press【▲】key Press【▼】key Press【▲】key Press【▼】key Press【▲】key Press【▼】key Press【▲】key Press【▼】key Press【▲】key SD card writing cycle indicator Date indicator Time indicator Temperature recording range setting indicator �2 Humidity recording range setting indicator �2 Normal measurement screen �1 (SD card recordable days indicator) � 1.This is displayed only when an SD card is inserted. � 2.This is displayed only when a user-selected setting has been designated (DIP switches 3 and 4 are set to ON, and the power is turned on). CAUTION ・The following operation can be performed only in the nor- mal measurement screen. - Registers the various settings ( 【FUNCTION】 Key) - Setting Alarm ( 【ALARM】 Key) - Marking function ( 【MARK】 Key) - Indicating dew point temperature and absolute humidity (【ENTER/DEW POINT/ABSOL. HUMINITY】 Key) - Pen replacement mode ( 【▼】 + 【ENTER】 Key)

8-1. SD card recording cycle indicator This displays the SD card recording cycle that is cur- rently set. 8-2. Date indicator This displays the current date. Reference ・The year data is displayed as the last two digits. This setting is valid for the year 2000 to 2099. Leap years are automatically applied during this year range. 8-3. Time indicator This displays the current time. The time data is displayed in 24-hour format. The dot at the right side of the hour data blinks at 2-second cycles (1 second on, 1 second of). 8-4. Normal measurement screen (SD card recordable days indicator) This is displayed only when an SD card is inserted. The SD card remaining space is displayed in the area of the normal measurement screen that shows the chart speed. The units are indicated by "M"for month, "D" for day, and "h" for hour, and "m" for minute. If the SD card remaining space becomes 0, 【REMAIN 】 and the number section of the SD card remaining space begins to blink. CAUTION ・If any of the various settings are changed, the alarm set- tings are made, or the pen is changed, the normal mea- surement screen returns to the chart speed screen. To display the SD card remaining space, change the screen again. ・The SD card remaining space is an estimated value only. 8-5. Temperature recording range setting indicator This is displayed only when a user-selected set- ting has been designated (DIP switches 3 and 4 are set to ON, and the power is turned on). This displays the currently-selected temperature re- cording range setting. 8-6. Humidity recording range setting indicator This is displayed only when a user-selected set- ting has been designated (DIP switches 3 and 4 are set to ON, and the power is turned on). This displays the currently-selected humidity record- ing range setting. SD card recording cycle SD card recordable days indicator Central temperature of the chart Recording range Central humidity of the chart Recording range Year Day Month Second （1 second on, 1 second of ） Minute Hour

9-2. Marking function If desired, press the 【MARK 】 key to leave a mark on the temperature trace while recording. CAUTION No mark will be made if the recording pen goes out of the chart paper. Chapter 9. Useful Function 9-1. Pen trace ofset compensation (POC) � Function overview When recording the temperature and humidity on the chart paper, those two traces inevitably have the diferent time axes due to the positional diference of the recording pens. Use this function to compensate the distance and align the time axes. � Setting POC ① Turn OFF ( 【 】) the power switch. ② Turn ON the DIP switch No.2, then turn the power switch ON again. ③ Temperature pen will soon start recording, while humidity pen will wait for the time in the above Reference. Then it will start recording. CAUTION Be sure to keep the DIP switch No. 5 to No. 8 OFF state. 9-3. Indicating dew point temperature and absolute humidity Press the 【ENTER / DEW POINT/ABSOL. HUMIDITY 】 key during the normal measurement display to display the dew point temperature and the absolute humidity for about 5 sec. At this time, 『D.P. 』 and 『g/m 3』 will blink. Temperature recording pen (Red) Humidity recording pen (Blue) Distance between time axes Chart paper Time peed s tr ha C 20mm/h 7.5 minutes approx. 10mm/h 15 minutes approx. 5mm/h 30 minutes approx. 2.5mm/h 1 hour approx. Reference The table below shows the reference between the chart speed and time required for the two traces to synchronize (agree with each other) in time axis. ON 1 2 3

10-1. Setting humidity alarm • The one-point calibration is provided as an optional setting in order to calibrate the sensor at the reference value shown on both basic thermometer and basic hy- grometer. • The 2-point calibration is also provided to calibrate the sensor at each reference value of low humidity and high humidity using a saturated salt type humidity calibrator or reference humidity generating bath. Use this function to maintain a highly reliable accuracy of the sensor. � To check the calibration status Turn ON the power swit ch while pressing the ( 【▲】) and 【ENTER 】 keys together. The 『MODE 』, 『CAL. 』 and 『C0 』 indications will be on the display. This screen shows the current status of the sensor calibration. CAUTION • To return to the normal measurement screen from the “Sensor calibration status” screen, turn OFF ( 【 】) the power switch. • To cancel a calibration, turn OFF ( 【 】) the power switch. • The consumption of the batteries will rise during the calibration. The operation menu for sensor calibration is as folows: Chapter 10. Sensor Calibration 10-2. Calibrating temperature sensor ① Press the 【ALARM 】 key while the “Sensor calibration status” screen is displayed. The 『1P 』 and 『C1 』 indica- tions will appear. ② Press the 【ENTER 】 key. The indication on the right side will start blinking. ③ Use the 【▲】 or 【▼】 key to enter the temperature value shown on the reference thermometer, then press the 【ENTER 】 key. The entered value will stop blinking to show the setting has been completed. Turn ON the power while pressing the【▲】 and 【ENTER 】 keys. Sensor calibration status Press 【ALARM 】 key Temperature calibration One-point humidity calibration 2-point humidity calibration Sensor calibration Initialization Press 【ALARM 】 key Press 【ALARM 】 key Press 【ALARM 】 key Press 【ALARM 】 key

④ Press the 【ALARM 】 key to return to the “Sensor calibra- tion status” screen. CAUTION To cancel this setting, press the 【ALARM 】 key and pro- ceed to the next setting item. 10-3. Calibrating humidity sensor ① Press the 【ALARM 】 key twice while the “Sensor calibration status” screen is displayed. The 『1P 』 and 『C3 』 indications will appear. ② Press the 【ENTER 】 key. The indication on the left side will start blinking. ③ Use the 【▲】 or 【▼】 key to enter the humidity value shown on the reference hygrometer, then press the 【ENTER 】 key. The entered value will stop blinking to show the setting has been completed. ④ Press the 【ALARM 】 key to return to the “Sensor cali- bration status” screen. CAUTION To cancel this setting, press the 【ALARM 】 key and proceed to the next setting item. 10-4. 2-point calibration of humidity sensor � Calibration at 33% RH ① Place the sensor in a saturated salt type humidity cali- brator or a reference humidity generating bath. ② Press the 【ALARM 】 key three times while the “Sensor calibration status” screen is displayed. The 『2P 』 and 『C5 』 indications will appear. ③ Press the 【ENTER 】 key, and the present temperature and humidity will be displayed (C6). Wait until the humid- ity becomes stable in the range of 33% + / -5RH. ④ When the humidity is stabilized, press the 【ENTER 】 key. The 『33.0 』 indication will start blinking. ⑤ Use the 【▲】 or 【▼】 key to enter the humidity value that corresponds to the present temperature shown on the humidity calibrator or the value indicated on the humidity bath, then press the 【ENTER 】 key. ⑥ The indication on the left side starts count from 1 to 5, then the humidity indication will stop blinking to show the setting has been completed. � Calibration at 75% RH ① Place the sensor in a saturated salt type humidity cali- brator or a reference humidity generating bath. ② After the 33% RH calibration is completed, press the 【ENTER 】 key. The 『2P 』 and 『C7 』 indications will ap- pear. ③ Press the 【ENTER 】 key, and the present temperature and humidity will be displayed (C8). Wait until the humid- ity becomes stable in the range of 75% + / -5RH.

④ When the humidity is stabilized, press the 【ENTER 】 key. The 『75.0 』 indication will start blinking. ⑤ Use the 【▲】 or 【▼】 key to enter the humidity value that corresponds to the present temperature shown on the humidity calibrator or the value indicated on the humidity bath, then press the 【ENTER 】 key. ⑥ The indication on the left side starts count from 1 to 5, then the humidity indication will stop blinking to show the setting has been completed. ⑦ Press the 【ALARM 】 key to return to the “Sensor calibra- tion status” screen. CAUTION • When this setting has been completed, all the keys but the 【ALARM 】 key will be inactive. • If the 2-point calibration of the humidity sensor is made, the humidity value calibrated in paragraph 10-3 will become invalid. • To cancel this setting, press the 【ALARM 】 key and proceed to the next setting item. 10-5. To initialize the calibrated value Follow the procedure below to initialize the calibrated val- ue. If it is not necessary, skip this paragraph. ① When the “Sensor calibration status” screen (C0) is dis - played, press the 【ALARM 】 key 5 times. The 『C9 』 indi- cation will appear with the 『CLEAR 』 indication blinking on the screen. ② Press the 【▼】 and 【ENTER 】 keys together. The cali- brated value will be cleared and the “Sensor calibration status” screen (C0) will be restored. CAUTION • To initialize means to restore the factory-setting. • To return to the normal measurement screen, turn OFF (【 】) the power switch. Chapter 11. Pen Position Adjustment 11-1. Function overview Errors in recording due to extension or contraction of the chart paper can be adjusted. If it is not necessary, skip this chapter. 11-2. To check the adjustment status Turn ON the power switch while pressing the 【▼】 and 【ENTER 】 keys together. The “Pen position adjustment sta- tus” screen will be displayed. CAUTION During this operation, no switch can be used until the pens stop moving completely and the blinking indica- tion becomes still.

The operation menu for pen position adjustment is as follows: 11-3. Adjusting temperature recording pen position ① When the “Pen position adjustment status” screen (P0) is displayed, press the 【FUNCTION 】 key. ② Press the 【ENTER 】 key. The indication on the right side (---) will start blinking. ③ Use the 【▲】 or 【▼】 key to enter “5” to bring the pen 5 mm from the left side of the chart paper, then press the 【ENTER 】 key. The entered number will stop blinking to show the setting has been completed. 11-4. Adjusting humidity recording pen position ① When the “Pen position adjustment status” screen (P 0) is displayed, press the 【FUNCTION 】 key twice. ② Press the 【ENTER 】 key. The indication on the left side (--) will start blinking. ③ Use the 【▲】 or 【▼】 key to enter “5” to bring the pen 5 mm from the left side of the chart paper, then press the 【ENTER 】 key. The entered number will stop blinking to show the setting has been completed. CAUTION • The adjustable range is from -5 mm to +5 mm on the chart paper. • The 【▲】 key moves the pen to the right side while the 【▼】 key moves it to the left side. • To cancel this setting, press the 【FUNCTION 】key and proceed to the next setting item. 11-5. To initialize the adjusted value Follow the procedure below to initialize the adjusted value. If it is not necessary, skip this paragraph. ① When the “Pen position adjustment status” screen (P0) is displayed, press the 【FUNCTION 】 key 3 times, The 『CLEAR 』 indication will appear and start blinking. ② Press the 【▼】 and 【ENTER 】 keys together. The ad- justed value will be cleared and the “Pen position adjust- ment status” screen (P 0) will be restored. CAUTION • To initialize means to restore the factory-setting. • To return to the normal measurement screen, turn OFF (【 】) the power switch. Turn ON the power while pressing the【 】 and 【ENTER 】 keys. Pen position adjustment status (P 0) Press 【FUNCTION 】 key Temperature pen position adjustment Humidity pen position adjustment Pen position adjusted value initialization Press 【FUNCTION 】 key Press 【FUNCTION 】 key Press 【FUNCTION 】 key

Chapter 12. Maintenance 12-1. Periodic inspection This instrument is a microprocessor-based hygrothermo- graph. To maintain the optimal performance, do the following inspections occasionally, and replace the parts, if necessary. ① Check if screen display and re cording are performed normal- ly. If any trouble is found, see Chapter 14, Troubleshooting. ② Check if traces are made clearly. See “Setting (Replacing) recording pen” in Chapter 3, if necessary. ③ Check if the chart paper is normally fed without being caught inside. If any trouble is found, see Chapter 14, Troubleshooting. ④ Check if the unused chart paper remains sufciently inside the instrument. When the remainder becomes 1 meter, a red END mark will appear. To replace the chart paper, see “Setting (Replacing) chart paper” in Chapter 3. ⑤ Check if the battery life indicator is blinking on the LCD screen. To replace the batteries, see Inserting (Replacing) dry batteries in Chapter 3. * After replacing the chart cassette with a new one, be sure to execute the pen position adjustment. Reference Sensor check For your information, we recommend an annual inspection of the instrument when used at normal temperature and in normal humidity, or semiannual inspection when used in high humidity. If humidity ac- curacy does not come to satisfy the specification, the sensor (assembly) should be replaced. Please con- tact our distributor for the replacement (to be paid). 12-3. Replacing the clock backup battery An internal backup battery is provided for the clock built into the ST-50M. The lifespan of the clock backup battery is about five years, but it can be more or less than this depending on the usage conditions. The clock backup battery should be replaced when error 802 or 803 occurs. Replacement of the clock backup is treated as repair work (fee charged). Please contact us or your dealer. 12-2. Replacement of sensor (assembly) ① Remove the sensor cord clamp. ② Disconnect the connector and replace the sensor as- sembly with a new one. (Sensor assembly includes sen- sor, cord and connector.) CAUTION When replacing the sensor assembly, be sure to turn OFF (【 】) the power switch.

Two types of data files are created, one for each day and one for each month. If a file with the same name already exists, data is added to that file. 13-1 File Names File names are assigned as shown below. (YYYY=Year, MM=Month, DD=Day) All characters are single-byte characters. File for each month: "YYYYMM.csv" File for each day: "YYYYMMDD.csv" For example, for January 1, 2009, The file created for the month would be "200901.csv" The file created for the day would be "20090101.csv" 13-2 Data Content The data files are saved in CSV format (comma-delimited text file), and the data is saved in the format shown below. ・The first line is the item name (header) and is written in the form shown below. Date,Time,Temp,Unit,D.P.,Unit,AlmH,AlmL,H,L,Humi,Unit,A.H.,Unit,AlmH,AlmL,H,L,Comment Data is written starting from the second line. The item names and data content are as shown below. Item Field name Data content 1 Measurement date Date This is the date that the measurement was taken. The data has the format "YYYY/MM/DD". 2 Measurement time Time This is the time that the measurement was taken. The data has the format "hh:mm:ss". 3 Temperature measurement value Temp This is the temperature measurement value. When the data is within the measurement range, the numerical value is shown to one decimal place. When the value is outside the range, this is indicated by "-OVER" or "+OVER". When a measurement error occurs, the data appears as "ERROR". 4 Temperature units Unit This is the units of the measurement value. Celsius is indicated by "C" and Fahrenheit is indicated by "F". 5 Dew point temperature measurement value D.P. This is the measurement value of the dew point temperature. When the data is within the measurement range, the numerical value is shown to one decimal place. When the value is outside the range or cannot be measured, the data appears as "ERROR". 6 Dew point temperature units Unit This is the units of the measurement value. Celsius is indicated by "C" and Fahrenheit is indicated by "F". 7 Temperature upper limit setting value AlmH This is the upper limit alarm setting value for the temperature. When the data is set, this is indicated by a numerical value to one decimal place. When no setting has been made, this is indicated by "OFF". 8 Temperature lower limit alarm setting value AlmL This is the lower limit alarm setting value for the temperature. When the data is set, this is indicated by a numerical value to one decimal place. When no setting has been made, this is indicated by "OFF". 9 Temperature upper limit alarm H This is the status of the temperature upper limit alarm. The data is "1" when the alarm is ON and is "0" when the alarm is OFF. 10 Temperature lower limit alarm L This is the status of the temperature lower limit alarm. The data is "1" when the alarm is ON and is "0" when the alarm is OFF. 11 Relative humidity measurement value Humi This is the measurement value of the relative humidity. When the data is within the measurement range, the numerical value is shown to one decimal place. When the value is outside the range, this is indicated by "-OVER" or "+OVER". When a measurement error occurs, the data appears as "ERROR". 12 Relative humidity units Unit This is the units of the relative humidity. The data is "%RH". 13 Absolute humidity measurement value A.H This is the measurement value of the absolute humidity. When the data is within the measurement range, the numerical value is shown to one decimal place. When the value is outside the range or cannot be measured, the data appears as "ERROR". 14 Absolute humidity units Unit This is the units of the absolute humidity. The data is "g/m^3”. 15 Relative humidity upper limit alarm setting value AlmH This is the upper limit alarm setting value for the relative humidity. When the data is set, this is indicated by a numerical value to one decimal place. When no setting has been made, this is indicated by "OFF". 16 Relative humidity lower limit alarm setting value AlmL This is the lower limit alarm setting value for the relative humidity. When the data is set, this is indicated by a numerical value to one decimal place. When no setting has been made, this is indicated by "OFF". 17 Relative humidity upper limit alarm H This is the status of the relative humidity upper limit alarm. The data is "1" when the alarm is ON and is "0" when the alarm is OFF. 18 Relative humidity lower limit alarm L This is the status of the relative humidity lower limit alarm. The data is "1" when the alarm is ON and is "0" when the alarm is OFF. 19 Comment Comment The information provided here can be used as comments in other applications. ・Example of Data File Date,Time,Temp,Unit,D.P.,Unit,AlmH,AlmL,H,L,Humi,Unit,A.H.,Unit,AlmH,AlmL,H,L,Comment 2008/09/10,00:00:26,26.1,C,12.0,C,OFF,OFF,0,0,41.7,%RH,10.1,g/m^3,OFF,OFF,0,0, 2008/09/10,00:06:26,26.2,C,12.1,C,OFF,OFF,0,0,41.7,%RH,10.1,g/m^3,OFF,OFF,0,0, 2008/09/10,00:12:26,26.2,C,12.1,C,OFF,OFF,0,0,41.5,%RH,10.1,g/m^3,OFF,OFF,0,0, 2008/09/10,00:18:26,26.2,C,12.1,C,OFF,OFF,0,0,41.5,%RH,10.1,g/m^3,OFF,OFF,0,0, 2008/09/10,00:24:26,26.3,C,12.1,C,OFF,OFF,0,0,41.5,%RH,10.3,g/m^3,OFF,OFF,0,0,

Chapter 14. Troubleshooting 14-1. Troubleshooting tips If the instrument does not operate normally, please check the following points before sending it for repair. If it does not recover from a malfunction after the check points are cleared, turn of the power switch immediately, then contact us or your distributor to get it repaired. 14-2. List of Error Messages CAUTION If the same error message appears again even after taking the appropriate measure, or if any error mes- sage other than the above described, please contance us or your distributor. st Chec k p nio n oitid on C Will not operate. Is the power switch turned ON? Is the dry batery set? Is the dry battery correctly set? Hasn’t the dry battery capacity run short? No display appears. Is the power switch turned ON? Is the dry batery set? Is the dry battery correctly set? Hasn’t the dry battery capacity run short? Will not start recording. Is the power switch turned ON? Is the dry batery set? Is the dry battery correctly set? Hasn’t the dry battery capacity run short? Hasn’t the ink in pen run short? Will not feed the chart paper. Is the chart paper set correctly? Is the chart cassette set correctly? Is the chart paper correctly fixed on the sprocket wheel? Feed timing of chart paper is inconsistent. Is the chart feed speed set correctly? Hasn’t the dry battery capacity run short? Measured value has a big error. Isn’t the sensor wet with dew? Trouble about the SD card. Refer to attention colum of "Chapter 5.Setting Recording Range" Message No. oit n ulo S sliat e D 100 Error in measuring the temperature and humidity Connect the sensor correctly. 151 Error in temperature sensor calibration Retry the calibration. 152 Error in humidity sensor calibration Retry the calibration. 153 Error in calibration at 33% RH Retry the calibration. 154 Error in calibration at 75% RH Retry the calibration. 201 Temperature pen initialization timeout Turn the power OFF then ON again. 202 Humidity pen initialization timeout Turn the power OFF then ON again. 203 Timeout in moving temperature pen into target position Turn the power OFF then ON again. 204 Timeout in moving humidity pen into target position Turn the power OFF then ON again. 205 Temperature pen marking timeout Turn the power OFF then ON again. 206 Humidity pen marking timeout Turn the power OFF then ON again. 210 Pen position adjustment failure T urn the power OFF then ON again. 700 SD card not inserted Insert the SD card. 701 Incompatible SD card Insert a compatible SD card. 702 SD card write-protect Cancel the write-protect of SD card. 703 SD card read/write error Check if the SD card is inserted correctly. 704 No available space in SD card Insert a new SD card. 705 SD card internal error Check if the SD card is inserted correctly. 802 Clock IC malfunction Set the date and time again. 803 Backup battery low voltage The backup battery must be replaced (fee charged). Please contact us or your dealer.

Chapter 15. Specifications Sensor Temperature Semiconductor Sensor Humidity High Molecular Electrostatic Capacity Sensor Measurement Ranges Temperature -20°C-50°C/0°F-120°F -20°C-80°C/0°F-170°F (with Sensor Extension Cable) Humidity 20-90%RH (No Condensation) 0-100%RH (with Sensor Extension Cable, No condensation) Display (LCD) Resolution 0.1°C/0.1°F, 0.1%RH Temperature -20°C-80°C/0°F-170°F Humidity 0-100%RH Display interval 10 seconds (standard mode), 60 seconds (Energy saving mode) Others Dew Point (-80°C-80°C/112°F-170°F) Absolute Humidity (0-290g/m3) Battery Checker, Alarm, Chart Speed, Set-Up Mode etc Recording Fiber Tip Pen Ink Lower Pen: Temperature (red) Upper Pen: Humidity (blue) Chart Paper Z-Fold Type, 12m/39.37 ft. (L), 113mm/4.45 in. (W), Folding pitch 40mm/1.57 in Working width 100mm/3.93 in. (for both Temperature and Humidity) Feeding Sprocket Feeding Accuracy ±3mm/0.12 in. (at 12m/39.37 ft. Long Recording) Chart Speed Recording Cycle Recording Period (Reference only) Battery Service Life (Standard Mode) Battery Service Life (Energy Saving Mode) (ST-50A) (ST-50M) (ST-50A) (ST-50M) 2.5mm (abt. 0.10 in.)/H 6minutes 6months 3months 3months 6months 4months 5.0mm (abt. 0.20 in.)/H 3minutes 3months 3months 3months 3months 3months 10.0mm (abt. 0.39 in.)/H 1.5minutes 1.5months 1.5months 1.5months 1.5months 1.5months 20.0mm (abt. 0.79 in.)/H 1.5minutes 3/4months 20days 20days 20days 20days Recording range Temperature Full span, 0-50°C (30-130°F), or *Discretionary enlarged range * (Central temperature of charts can be set discretionarily. The ranges from the center are ±25°C, ±10°C, ±25°F or ±50°F) Humidity Full span or *Discretionary enlarged range * (Central humidity of charts can be set discretionarily. The ranges from the center is ±25%RH or ±10%RH) Memory storage (ST-50M only) Storage medium SD memory card Storage capacity 128MB-2GB Storage format Comma-delimited text file (CSV format) Recording cycle 1minute/1.5minutes/3 minutes/5 minutes/6 minutes/10 minutes/12 minutes/ 15 minutes/30 minutes/60 minutes Stored files Maximum of 512 files: 1 file per day and 1 file per month Accuracy Temperature ±1.0°C/±1.8°F (Measurement Ranges at 0-50°C/32-122°F) Humidity ±3%RH (at 25°C/77°F, Measurement Ranges 20-80%RH) econd s pe r month s 0 ±6 nih et w ti Accura )yln ccurac (y S T-50M o a k ol c C .d ompensa et c e c n a n b pe ytidi n d hum a n mperatur e pe et f xe s o a e m it e Th ac e o sff e c t ompensa oit n rt n e P ac .e rt g r e ecor nid mperatur et e t n h c g a n b e marke d o mar nik - ).ni 2 1.0 3mm ( g ar nik M Installation Indoor-use only, installation of altitude up to 2,000 m (6,561 ft). Main supply voltage fluctuations not to exceed ±10% of the nominal voltage. condition Temperature -20°C-50°C/0°F-120°F Humidity 20-90%RH, No condensation Vibration No vibration allowed Installation Not inclined more than +/-10 degrees from the horizontal plane (Not inclined more than +/-10 degrees from the vertical plane when mounted on the wall) : Transport/Storage condition -30°C-70°C/-22°F-158°F Power Supply Battery (LR20, 1.5V x 4) : AC Adapter : Instrument Rating Input power voltage rating : DC9V Power rating : 5VA )s eir ( s w ti hou t t h e Ba ett bl1.5 / ) (” D 1.4 x ) (” H 6.9 x ) (” W 8.1 1 / g k 3.2/ ( 5 D ) mm 0 1 x ) ( 5 H 4 2 x ) ( 0 W 30 ht gie ns/W imen ois D Callibration Temperature (Calibration range: -20°C-80°C, 0.1°C, 0.1°F unit) Maxium calibration span: ±10°C, ±18°F Humidity 1-point (Calibration range: 0-100%RH, 0.1%RH unit) Maxium calibration span: ±20%RH 2-point (Calibration range: 33±5%RH, 75±5%RH) Alarms Temperature (2 points) Upper and lower limits setting (Range: -20°C-80°C, 1°C/1°F unit) Humidity (2 points) Upper and lower limits setting (Range: 0-100%RH, 1%RH unit) )t om Zer o p nio rf y mm a wa 5 :t ujd stmen t p nio A ( tin mm u 1.0 , ±5mm ujd stment a n oitis e n po P Standard Accessories 4 x D size Batteries (used for trial), 1 x Chart Paper, 1 each x Fiber Tip Pen (for Temperature and Humidity), 1 x Operation Manual CE ( E N61010 ) Approved oit ns eg alu R Optional Accessories Sensor Extension Cable 5m (16.40 ft), 20m (65.62 ft) and 50m (164.04 ft) ,Dust-Proof and Splash-Proof Cover

TEL 03-3978-2333（営業） FAX 03-3922-2144 （営業） 保 証 規 定 １. 保証期間内において、取扱説明書、本体貼付ラベル等の注意書に従った正常な使用状態で故障した場合には、ご購入店 または当社が無料修理をさせていただきます。 ２. 本製品の故障、またはその使用によって生じた直接、間接の損害については当社はその責任を負わないものとします。 ３. 保証期間内でも次の場合には有料修理となります。 （１） 本保証書の提示がない場合。 （２） ご使用上の誤りおよび不当な修理や改造による故障および損傷。 （３） お客様での輸送移動中の落下など、お取り扱いが適当でないために生じた故障および損傷。 （４） 火災、塩害、ガス害、地震、落雷、その他の天変地異、公害や水害、異常電圧などの外部要因に起因する故障および損傷。 （５） 接続している他の機器に起因して本製品に生じた故障および損傷。 （６） 本保証書に製品名、機体番号の記載がなく、ご住所、ご氏名、購入先、購入年月日の記載がない場合。 ４. この保証規定書は日本国内においてのみ有効です。 ＊ 修理依頼品および修理完了品の送料はそれぞれ送付元負担とさせていただきます。 ＊ この保証規定は提示した期間、条件のもとにおいて無料修理をお約束するものです。従ってこの保証規定によってお客 様の法律上の権利を制限するものではありませんので、保証期間経過後の修理などについてはお買い上げの販売店、ま たは当社サービス窓口へお問い合わせください。 ５. 個人情報について （１） お客様より頂きました個人情報は、個人情報保護法のもと、以下の利用目的等に限定し、第三者への提供はいたし ません。 a. 電話・FAX・E‐Mail・手紙などによる各種情報配信サービスとそのご案内 b. 弊社、社内使用に限定したマーケティング資料の作成 （２） お客様ご本人が確認・開示または訂正・削除を希望される場合には、下記にご連絡ください。 保　証　書 　　　　　　　　　　温湿度記録計　ST-50A / ST-50M 〒 178-8686 東京都練馬区大泉学園町 7-24-14 株式会社 セコニック 機器事業部 営業部 温湿度記録計担当 TEL 03 －3978 －2333　FAX 03 －3922 －2144 E-mail : [email protected]

TEL 03-3978-2333　FAX 03-3922-2144 Head office 7-24-14, Oizumi-Gakuen-cho, Nerima-ku, Tokyo 178-8686 Tel +81-3-3978-2335 Fax +81-3-3978-5229 2008年11月初版発行 HE5097510　08.11.Ｓ First issue: Nov, 2008 HE5097510 08.11.S http://www.sekonic.co.jp/ ［ご注意］この資料の記載内容は、お断りなく変更する場合がありますのでご了承ください。 The contents of this Operation Manual is subject to change without prior notice.