The Trek Model 541A Electrostatic Voltmeter (pictured at left with the Model 541PR-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, the negative peak voltage and additional menu information.
Chopper probe is DC-stable with or without incident air ion 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
Voltage output monitor for remote monitoring or control
USB and RS-232 serial ports
NIST-traceable Certificate of Calibration provided with each unit
CE compliant
Optional Walking Test Adapter kits available
Model 541A-1
Measurement Range:
Model 541A-1: ±1KV
Model:541A-2: ±100V
Speed of Response (10%to 90%)
Less than 50 ms for a ±1 kV step (541A-1)
Less than 50 ms for a ±100 V step (541A-2)
Measurement distance:2.5mm±1mm
Accuracy:1% of full scale
Resolution:0.1%
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 x 8” D)
Weight 0.77 kg (1.7 lb.)