Desco TB-3048 Technical Bulletin

Made in America © 2010 DESCO INDUSTRIES INC. Employee Owned Digital Static Locator Installation, Operation, and Maintenance Description Desco’s Digital Static Locator is a compact electrostatic fieldmeter used for locating and measuring static charges. The Digital Static Locator measures static voltages within ±20kV (20,000V) at a distance of 1". Results are simultaneously displayed numerically and in bar graph format. POWER on/off, ZERO adjustment, Ion Balance (IB) and HOLD are all push button operation. The HOLD button allows the display to retain the static charge reading. This is especially useful where display is difficult to see during measurement. Two LED guide ring range lights help position the fieldmeter at the right distance from a charged surface. The conductive case and ground snap facilitate grounding for accurate measurement. The circuitry of the 19430 has been designed to make measurements in areas using air ionization. Packaging 1 Digital Static Locator 1 Plate Assembly 1 Ground Cord 1 Battery Features The 19430 has four push buttons. The buttons operate by pressing once lightly. There is no need to press the button repeatedly. Its effective life may be decreased by repeated misuse. Figure 1. Digital Static Locator Item #19430 TECHNICAL BULLETIN TB-3048 DESCO WEST - 3651 Walnut Avenue, Chino, CA 91710 • (909) 627-8178 • Fax (909) 627-7449 DESCO EAST - One Colgate Way, Canton, MA 02021-1407 • (781) 821-8370 • Fax (781) 575-0172 • Web Site: Desco.com The POWER button turns the Digital Static Locator on and off. If the 19430 is left on for 5 minutes, it will automatically turn itself off. To resume operations, press the red POWER button once. To disable the AutoOff feature and allow continuous operation, press the red Power button and hold down for at least 3 seconds when turning the Digital Static Locator on. The HOLD button holds the display of a measured charge. HOLD mode turns off the ring range lights. No measurements are possible when in the HOLD mode. The hold measurement feature enables the user to use the fieldmeter in inaccessible areas. When the HOLD button is pressed once during a measurement, the digital numerical value and the bar graph will be held on the display. This function allows the operator to move the fieldmeter where it can be more easily read. The HOLD mode is displayed above the battery capacity display. To cancel HOLD mode and resume measurement, press HOLD once more. The IB button and prepares the fieldmeter for Ion Balance (offset voltage) measurement. The ZERO button sets the display to a zero static charge. When the digital meter is turned on, the zero adjustment is inoperative if it is in HOLD mode. NOTE: For reliable measurement, the fieldmeter must be grounded properly using the ground lead provided. The plastic case of the 19430 Electrostatic Fieldmeter is made of conductive resin. The grounding terminal provides the reference potential for the electrical circuit. This terminal must be grounded properly for accurate measurement. Operation For Static Charge Measurement 1. Turn the ring range lights and sensor toward a surface to be evaluated. 2. Press the POWER button. A single beep for one second indicates proper operation. The battery capacity indicator and bar graph will be displayed. 3. The meter reading should be zero (0). Use the ZERO button if it is not.

surface. Two beams of light will form concentric circles when the meter is the correct distance, 1” away, from the surface. The measurement accuracy is dependent on a stable ground reference and the 1 inch measuring distance. It is also dependent on the “aspect ratio”, relating the size of the object to be measured to the measurement distance. This aspect ratio should be at least 3 for best accuracy, i.e. the object should be at least a 3 inch square when measuring at a 1 inch distance. Accurate measurements may be made at other measurement distances by scaling the meter range and observing the proper aspect ratio. For example, at a measurement distance of 3 inches, multiply the meter reading by 3 to give a range of 0 to 60 kilovolts. For accuracy, the object being measured at this distance should be at least a 9 inch square. 5. A bar graph and a digital display on the 19430 displays the voltage of the charge. Press HOLD if you want to hold the display of the measured charge. 6. To turn off meter: Press POWER if you have not used the HOLD mode. If you have pressed HOLD and wish to retain the meter reading for the next use, press the POWER button to turn off the 19430. If you have pressed HOLD and do not wish to retain the meter reading for next use, press HOLD then POWER. If the 19430 is left on for five minutes, the unit will beep five times then turn itself off automatically. To disable this feature, simply press and hold the red power button for at least three seconds when turning the 19430 on. Three beeps and the A-OFF display indicates that the feature has been disabled. Results A display of [+] or [-] next to the digital numeric value represents the polarity of the static charge being measured. In addition, the color of the bars in the bar graph indicates the polarity of the static charge. Red and blue bars indicate positive and negative charges respectively. During a static charge measurement, if the digital display starts flashing along with a continuous beep, stop taking the measurement. The static charge is greater than the meter can measure. Attempts to measure too high a charge may damage the sensor. © 2010 DESCO INDUSTRIES INC. Employee Owned TB-3048 Page 2 of 5 DESCO WEST - 3651 Walnut Avenue, Chino, CA 91710 • (909) 627-8178 • Fax (909) 627-7449 DESCO EAST - One Colgate Way, Canton, MA 02021-1407 • (781) 821-8370 • Fax (781) 575-0172 • Web Site: Desco.com Operation For Ion Balance (Offset Voltage) Measurement NOTE: The Digital Static Locator Ion Balance measurement feature should not be used to measure the ion balance of static bars. It may be used to mea- sure other ionizers for ion balance (offset voltage). 1. Depress the plate assembly release button on either side of the fieldmeter to remove the charge plate assembly. 2. Insert the plate assembly into the other end of the fieldmeter (the end with the Desco logo) until it clicks into place. NOTE: Ion Balance plate assembly must not move during measurement. 3. The conductive case must be grounded using the supplied ground cord. It is imperative for accurate ion balance and to drain any charge that has developed prior to measurement. 4. To turn on the ion balance measuring circuit, press the blue IB button. 5. Turn sensor toward an uncharged area. 6. The meter reading should be zero (0). Press the Zero button if it is not. 7. Hold the fieldmeter centered in front of the ionizer at any convenient, repeatable distance, such as 1 foot. 8. A bar graph and a digital display on the 19430 displays the ion balance information. Press HOLD if you want to hold the display of the measured charge. 9. To turn off the meter: Press POWER if you have not used the HOLD mode. If you have pressed HOLD and wish to retain the meter reading for the next use, press the POWER button to turn off the 19430. If you have pressed HOLD and do not wish to retain the meter reading for next use, press HOLD then POWER. 10. Depress the charge plate assembly release buttons on either side of the fieldmeter to remove the charge plate assembly. Store the plate on the opposite end, pressing it until it clicks into place. Figure 3.

Employee Owned TB-3048 Page 3 of 5 DESCO WEST - 3651 Walnut Avenue, Chino, CA 91710 • (909) 627-8178 • Fax (909) 627-7449 DESCO EAST - One Colgate Way, Canton, MA 02021-1407 • (781) 821-8370 • Fax (781) 575-0172 • Web Site: Desco.com If the 19430 is left on for five minutes, the unit will beep five times then turn itself off automatically. This feature can be disabled. Troubleshooting Guide Fault Possible Causes Solution Fieldmeter is on but when turned toward a charges object, the number and the bar graph do not change. The meter is in HOLD mode of operation. Cancel the HOLD mode by pressing the HOLD button once. The display cannot be set to zero. The meter is in HOLD mode. The true ZERO point has shifted. Cancel the HOLD mode by pressing the HOLD button once. If the meter reads 0.20 or more for an uncharged object, a read adjustment may be needed. Contact your local representative or Desco Customer Service for adjustment, repair or replacement. When the POWER button is pressed, LCD display does not appear. No battery, low battery capacity or bad contact. Malfunction of the LCD display. Replace the battery / Make proper connection. Discontinue use and contact your local representative or Desco Customer Service for adjustment, repair or replacement. A part of the LCD display does not appear. Display shows ERROR. Alarm does not sound. Malfunction of the LCD display. Discontinue use and contact your local representative or Desco Customer Service for adjustment, repair or replacement. LCD display renewal rate: 5 times/s Accuracy: 20KV ± 10 % Ambient conditions: 50º-100ºF, (10º - 40ºC); 0 - 60 %RH (non-condensing) Display features: Bar graph; red LCD positive polarity voltage, blue LCD negative polarity voltage Bar graph precision: ±0.1 kV for low range ±1.5 kV for high (Hi) range; ±15 V for ion balance range Digital reading: Auto-ranging, three digits . = 0 to ±1.49 kV . = ±1.0 kV to ±20.0kV (Hi) = 0 to 200 (Ion Balance) Ion Balance (offset voltage) mode display: [IB] is displayed Battery capacity display indicator HOLD switch to retain display after measurement Error sign [Error] appears if the sensor is damaged Alarm feature: Beep sound will be heard during the following actions: Power on: one beep Power on with Auto Off feature disabled: [Depress power button for more than 3 seconds] three beeps Auto power-off: short beeps at 1 second interval for 5 seconds before power off Over range: Continuous sound Auto power-off: Power turns off automatically after five minutes. [A.OFF] is displayed whenever this feature is disabled. Power source: 9 V, 6F22Y manganese battery. Battery life: In excess of 30 hours. Size: 4 7/8” (123mm) (L) × 2 7/8” (73mm) (W) × 1” (25mm)(D) Weight: 6 oz. (170g) Case material: Conductive resin (ABS) Specifications Measuring range: 0 to ±1.49 kV (Lo range) ± 1.0 kV to ± 20.0 kV (Hi range) (Range hysteresis: ± 1.0 kV to ± 1.5 kV) 0 to ± 200 V (Ion Balance measuring range) Measuring distance: 1"±1/64" (25mm ± 0.5mm); LEDs guide for correct distance (between charged surface and fieldmeter) Response time: <1 s

Employee Owned TB-3048 Page 4 of 5 DESCO WEST - 3651 Walnut Avenue, Chino, CA 91710 • (909) 627-8178 • Fax (909) 627-7449 DESCO EAST - One Colgate Way, Canton, MA 02021-1407 • (781) 821-8370 • Fax (781) 575-0172 • Web Site: Desco.com NOTE: The dark area in the battery indicator display is not proportional to the remaining energy. Replacement Procedure The battery compartment on the back side of the fieldmeter has a removable cover marked OPEN. Be careful while connecting or disconnecting the battery. To avoid breaking the contacts, do not pull the connection plug hard. 1. Press down on OPEN and slide the cover down. 2. Remove the old battery (if present). 3. Connect the new battery and insert it into the battery compartment. 4. Reattach the cover back to the battery compartment. Before closing the cover, make sure that no parts of the leads are outside the battery compartment. Saftey Instructions • DANGER indicates an immediately hazardous situation which, if not avoided, will result in death or serious injury. • WARNING indicates a potentially hazardous situation which, if not avoided, could result in death or serious injury. • CAUTION indicates a potentially hazardous situation which, if not avoided, will result in property damage. • NOTE indicates precautions necessary to avoid potential equipment failure. This equipment must be installed and maintained as outlined in this manual. This equipment is not constructed for classified (hazardous) environments. It cannot be used where it will be exposed to ignitable or corrosive materials. The 19430 is intended for use in areas that are free of water, oil, solvents and other conductive contaminants. Exposure to such contaminants will cause failure of the electrical insulation system in the product. Formulation of dew on the fieldmeter must be avoided. Do not operate near corrosive fumes of acid/alkali or corrosive gases such as chlorine. The 19430 must be properly grounded to function accurately. The 19430 contains a microcomputer chip. It should not be used in an environment with excessive electromagnetic noise. The internal parts of the 19430 should never come in contact with foreign substances. The 19430 has been calibrated for a measuring distance of 1”± 1/64" (25mm ±0.5mm). Important Notes and Cautions 1. Store and use the fieldmeter in a clean and dry environment. Foreign substances should never enter or touch the internal parts. 2. Vibration and impact may damage and/or affect the sensitivity of measurement of the instrument. 3. Do not attempt to disassemble the fieldmeter. 4. The measuring distance between the fieldmeter and a test object should be 1" ± 1/64" (25mm ± 1mm). The calibration was carried out at this distance. The specified accuracy is valid for this distance. 5. Grounding of the instrument is essential for accurate ion balance measurements 6. To maintain the high insulation level of insulation of the plate, the 19430 should be stored in a place having less than 60 %RH. It should be kept inside a plastic zipper bag with desiccant. 7. This fieldmeter is not an explosion-proof product. Do not use this product in flammable atmosphere such as paint-thinner, benzene, gasoline, propane, natural gas etc. 8. The instrument should be re-calibrated once a year. Contact Desco Customer Service when a recalibration of the fieldmeter is necessary. Fully Charged Empty Figure 2. Residual battery charge as displayed. Battery Replacement The Digital Static Locator uses 9 V, 6F22Y Manganese battery. The life of the battery is about 30 hours. When the POWER switch is on, a battery charge indicator displays the state of the battery on the front panel.

Employee Owned TB-3048 Page 5 of 5 DESCO WEST - 3651 Walnut Avenue, Chino, CA 91710 • (909) 627-8178 • Fax (909) 627-7449 DESCO EAST - One Colgate Way, Canton, MA 02021-1407 • (781) 821-8370 • Fax (781) 575-0172 • Web Site: Desco.com Limited Warranty Desco expressly warrants that for a period of (1) year from the date of purchase an Desco Digital Static Locator will be free of defects in material (parts) and workmanship (labor). Within the warranty period, a credit for purchase of a replacement Desco Digital Static Locator, or, at Desco’s option, the Digital Static Locator will be repaired or replaced free of charge. Call our Customer Service Department at 909-664-9980 (Chino, CA) for a Return Material Authorization (RMA) and proper shipping instructions and address. Please include a copy of your original packing slip, invoice, or other proof of date of purchase. Any unit under warranty should be shipped prepaid to the Desco factory. Warranty replacements will take approximately two weeks. If your unit is out of warranty, call our Customer Service Department at 909-664-9980 (Chino, CA) for a Return Material Authorization (RMA) and proper shipping instructions and address. Desco will quote repair charges necessary to bring your unit up to factory standards. Warranty Exclusions THE FOREGOING EXPRESS WARRANTY IS MADE IN LIEU OF ALL OTHER PRODUCT WARRANTIES, EXPRESSED AND IMPLIED, INCLUDING MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE WHICH ARE SPECIFICALLY DISCLAIMED. The express warranty will not apply to defects or damage due to accidents, neglect, misuse, alterations, operator error, or failure to properly maintain, clean or repair products. Limit of Liability In no event will Desco or any seller be responsible or liable for any injury, loss or damage, direct or consequential, arising out of the use of or the inability to use the product. Before using, users shall determine the suitability of the product for their intended use, and users assume all risk and liability whatsoever in connection therewith.