The Trek Model 520 (±2kV) Hand-Held Electrostatic Voltmeters provide accurate, noncontacting measurements of electrostatic surface voltage for ESD applications in either ionized or non-ionized environments.
These two voltmeters utilize a measurement technique that overcomes the disadvantage of the typical hand-held field-meter by providing surface voltage measurements which are essentially independent of the sensor probe-tomeasured surface spacing.
Model 520 is available in two versions. The 520-1 has a digital meter to display the measured voltage. The 520-2 has an analog output monitor in addition to the digital display. This analog output monitor can be used to record the measured voltage or to view it on an oscilloscope.
Accurately measures surface voltage at a wide range of spacings
No need to maintain a fixed spacing
Chopper stabilized for drift-free operation in ionized environments
NIST-traceable Certificate of Calibration provided with each unit
CE compliant
Measurement Range：0 to ±2 kV
Measurement Accuracy: Better than ±5% of full scale over the entire recommended probe-to-surface separation range of 5 mm to 25 mm
Speed of Response (10% to 90%) (520-2 Voltage Monitor Output): Less than 25 ms for an input step change of 2 kV
Voltage Display Range: A 3 ½ digit liquid crystal display
Resolution：1 V
Output Impedance 47Ω
Zero Offset：Less than ±1 count
Power On/Off: Push-button switch
Stability
Drift with Time： Less than 600 ppm/hour, noncumulative
Drift with Temperature： Less than 600 ppm/°C
Operating Time： Approximately 8 hours with a full battery
Hold： A momentum push-button will command the voltage display to hold the value displayed until the switch is released
Sampling Rate： 2.5 readings per second
Power Requirements： One (1) 9-volt NEDA 1604 battery, IEC 6R61 battery or equivalent
Ground Receptacle Snap-on connector
Operating Conditions：
Temperature 15°C to 35°C
Relative Humidity： To 85%, noncondensing
Dimensions： 31 mm H x 59 mm W x 173 mm D (1.2” H x 2.4” W x 6.8” D)
Weight： 200 g with battery
