美國 TREK 520手持式靜電電壓測試儀
特點(diǎn):
TRE-520:0~±2KVDC
TRE-523:0~±20KVDC
精準(zhǔn)度±5%, 具備Hold功能
應(yīng)用: 人體或?qū)ο蟊砻骒o面量測試，主要用于廠內(nèi)靜電產(chǎn)生情況的抽檢

Model 520 Series HAND-HELD Electrostatic Voltmeter

The Model 520 Series includes the Model 520 and Model 523.

The TREK Model 520 Hand-Held Electrostatic Voltmeter （ESVM） Series products provide accurate, noncontacting measurements of electrostatic surface voltage for ESD applications in either ionized or non-ionized environments. Industrial applications include measuring charge accumulation in the LCD manufacturing process or measuring static charge in semiconductor production. The Model 520 series ESVMs utilize a new measurement technique that overcomes the disadvantage of the typical hand-held fieldmeter by providing surface voltage measurements which are essentially independent of the sensor probe-to-measured surface spacing.

Model：520-1 ESVM
Over a spacing range of 5 mm to 25 mm, the 520 voltmeter provides better than a 5% voltage measurement accuracy, while the typical fieldmeter provides a voltage measurement error in excess of 50%. An optional voltage monitor output is available （Model：520-2）. 

Model 523 ESVM
Over a spacing range of 30 mm to 60 mm, the 523 voltmeter provides greater than a 5% voltage measurement accuracy, while the typical fieldmeter provides a voltage measurement error in excess of 50%. 

The 520 series provides a measurement system which complies with standardized calibration equipment traceable to the National Institute of Standards and Technology. The 520 series hand-held voltmeters employ a slender sensor probe design that provides flexibility to make measurements in many locations which are impossible to reach using the large, bulky sensing surfaces of the typical hand-held fieldmeter. The slender design also allows for higher spatial resolution capability by allowing the measurement of small surface areas. A "hold" pushbutton retains the displayed measured voltage value for recording purposes.

·  Model：520 Measurement Range 
0 to ±2 kV DC.

Model 523 Measurement Range 
0 to ±20 kV DC.

Model：520 Accuracy 
ESVM Monitor （Model：520-2） 
Better than ±5% of full scale over the entire recommended probe-to-surface separation range of 5 mm to 25 mm.

Model 523 Accuracy 
Better than ±5% of full scale over the entire recommended probe-to-surface separation range of 30 mm to 60 mm.

Model：520 Probe-to-Surface Separation （recommended）
5 mm to 25 mm.

Model 523 Probe-to-Surface Separation （recommended）
30 mm to 60 mm.

Stability 
Drift with Time 
Less than 600 ppm/hour, noncumulative.
Drift with Temperature 
Less than 600 ppm/°C.