The Trek Model 542A Electrostatic Voltmeter (pictured at left with the Model 542P-S probe) provides accurate non-contacting measurements of the electrostatic surface voltage associated with EOS/ESD processes. The instrument is configured with a miniature electrostatic field chopper probe that can be remotely located and easily positioned within process equipment to provide highly accurate, non-contacting, DC-stable, spacing-independent voltage measurements in either ionized or non-ionized environments. A 20x4 alphanumeric LCD screen displays the present measured voltage, the positive peak voltage value, the negative peak voltage value and additional menu information.
Chopper probe is DC-stable with or without incident air flow
Drift-free measurements
LCD screen displays present voltage and holds the most positive and negative values
Visual and audible alarms activate when the preset voltage threshold levels are reached
Analog voltage monitor output
USB and RS-232 serial ports
NIST-traceable Certificate of Calibration provided with each unit
CE compliant
Optional Walking Test Adapter kit available
Measurement Ranges
Model 542A-1: 0 to ±10 kV DC or peak AC
Model 542A-2: 0 to ±20 kV DC or peak AC
Speed of Response (10%to 90%): Less than 50 ms for a ±1 kV step
Accuracy Better than ±5% of the reading ±0.2% of full scale over a probe-to-surface separation of:
Model 542A-1 15 mm to 30 mm
Model 542A-2 30 mm to 60 mm
Drift with Time: Less than ±1% full scale, non-cumulative
Temperature: 15°C to 35°C (59°F to 95°F)
Relative Humidity: 5% to 85% RH, non-condensing
Altitude: To 2000 m (6561.68 ft.)
Dimensions: 97 mm H x 152 mm W x 204 mm D (3.8” H x 6” W x8” D)
Weight: 0.77 kg (1.7 lb.)
