Trek 884 Hand-Held Electrostatic Voltmeters User Manual

Hand-held electrostatic voltmeters, Measurement and power solutions

Models 876 and 884

Hand-Held Electrostatic Voltmeters

Model 876
Measurement Range:
0 to ±2 kV DC

Model 884
Measurement Range:
0 to ±20 kV DC

1.8 meter (6 ft)
probe cable length

Accurately measure
surface voltage at a
wide range of spacings

No need to maintain a
fixed spacing

Inspect small spots for
charge accumulation

Measure charge
accumulation in
difficult-to-reach
locations

Chopper stabilized for
drift-free operation in
ionized environments

Compliant

The Trek Models 876 and 884 Hand-Held Electrostatic Voltmeters
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 Models 876 and 884
voltmeters 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 876 (0 to ±2 kV DC)
Over a spacing range of 5 mm to 25 mm, the 876 voltmeter provides
better than a 5% voltage measurement accuracy, while the typical
fieldmeter provides a voltage measurement error in excess of 50%.

Model 884 (0 to ±20 kV DC)
Over a spacing range of 30 mm to 60 mm, the 884 voltmeter provides
greater than a 5% voltage measurement accuracy, while the typical
fieldmeter provides a voltage measurement error in excess of 50%.

The Models 876 and 884 hand-held voltmeters employ an efficient and
compact sensor probe design. The probe design allows for higher spatial
resolution capability by allowing the measurement of small surface
areas.

The probe is attached to the meter with 6 feet of cable length. The length
of cable provides the flexibility to make measurements in many locations
that are impossible to reach using the large bulky sensing surfaces of the
typical hand-held fieldmeter. A "hold" push button retains the displayed
measured voltage value for recording purposes. The Models 876 and
884 provide a measurement system with calibration traceable to the
National Institute of Standards and Technology.

Measurement and Power Solutions