人人妻人人插视频_精品在免费线_久久精品一区视频_波多野结衣强奷系列在线观看_超碰91在线观看_日本精品免费观看

美國 TREK 520手持式靜電電壓測試儀 應用: 人體或對象表面靜電量測試，主要用于廠內靜電產生情況的抽檢

 

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.