Máy đo điện áp tĩnh điện Trek 325
The Trek Model 325 Electrostatic Voltmeter is a versatile instrument used for performing noncontacting electrostatic voltage measurements in applications which include contact potential (surface work function) determination, materials evaluation and electret studies. The Model 325 was specifically designed for high sensitivity applications to allow highly accurate, low noise, noncontacting measurement of electrostatic voltages of 0 to ±40 V over a wide range of probe-to-surface distances.
Special features of the Model 325 allow tuning the performance of the unit to compensate for specific test conditions. A calibrated Null Voltage supply of ±10 volts nulls measured surface contact potential when measuring voltages on associated metallic test surfaces. A response Speed Control adjusts the AC response of the Model 325. A Drift/Spacing Null Adjustment minimizes the variation in monitored voltage values as the probe to test surface spacing changes.
A dual range front panel 3½ digit LED display resolves ±10 mV. The measured voltage can also be monitored through a precision 1:1 voltage monitor output and/or a 10:1 voltage monitor output.
Trek’s patented low impedance probe sensor assures measurement accuracy which is essentially independent of probe-to-test-surface spacing while eliminating the external environmental effects of high humidity and contamination, such as airborne dust, toner, ions and chemicals, on measurement accuracy.