Products > ESD > Electrostatic Voltmeters for ESD

Model 876 & 884 HAND-HELD Electrostatic Voltmeter

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 electrostatic 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 P0876A (0 to ±2 kV DC)
Over a spacing range of 5 mm to 25 mm, the P0876A 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. 

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PERFORMANCE

Model 876

Measurement Range 
0 to ±2 kV DC.

Accuracy
Better than 5% of full scale over the entire recommended probe-to-surface separation range of 5 mm to 25 mm.

Voltage Display 
Better than ±0.5% of full scale, referred to voltage monitor.

Stability 
Drift with Time 
Less than 600 ppm/hour, noncumulative.
Drift with Temperature 
Less than 600 ppm/°C.

Model 884


Measurement Range 
0 to ±20 kV DC.

Accuracy 
Better than ±5% of full scale over the probe-to-surface 
separation range of 30 mm to 60 mm.

Zero Offset 
Less than ±4 counts.

Stability 
Drift with Time 
Less than 600 ppm/hour, noncumulative.
Drift with Temperature 
Less than 600 ppm/°C.

ACCESSORIES

Accessories Supplied

  • Operator's manual, 9-volt battery, 2 m coiled snap-on connector-to-alligator clip cable assembly (for ground reference connection).

 

PRODUCT FEATURES

Model 876

Hold 
A push button that, when pressed, commands the voltage display to hold the value displayed until the button is released.

Voltage Display 
3½ digit liquid crystal display.
Range 
0 to ±1999 V.
Resolution 
1 V.
Zero Offset  
Less than ±1 count.
Sampling Rate 
2.5 readings per second.

Power On/Off 
A push button.

Probe Cable Length 
1.8 meter (6 ft.).

Model 884

Hold 
A push button that, when pressed, commands the voltage display to hold the value displayed until the button is released.

Voltage Display 
3½ digit liquid crystal display.
Range 
0 to ±19.99 kV.
Resolution 
10 V.
Sampling Rate 
2.5 readings per second. 

Power On/Off 
A push button.

Probe Cable Length 
1.8 meter (6 ft.).

GENERAL

Model 876

Dimensions 
31 mm H x 59 mm W x 127 mm D,
(1.2" H x 2.3" W x 5"L).

Weight 
200 g (7 oz), with battery.

Ground Receptacle
Snap-on connector.

Power Requirements 
One (1) 9-volt NEDA 1604 or equivalent battery.

Operating Time 
8 hours with a new battery.

Operating Conditions 
Temperature 

15°C to 35°C.
Relative Humidity 
To 85%, noncondensing.

Model 884


Power Requirements 
One (1) 9-volt NEDA 1604 or equivalent battery.

Operating Time 
8 hours with a new battery.

Operating Conditions 
Temperature 

15°C to 35°C.
Relative Humidity  
To 85%, noncondensing.

Dimensions 
31 mm H x 59 mm W x 127 mm D
(1.2" H x 2.3" W x 5" L).

Weight 
200 g (7 oz), with battery.

Ground Receptacle 
Snap-on connector.

CERTIFICATION

TREK, INC. certifies that each Model 876 and Model 884 are tested and calibrated to specifications using measurement equipment traceable to the National Institute of Standards and Technology or to consensus standards. 

Pollution Category
Degree 1: Operate in environments where no pollution or only dry, nonconductive pollution occurs.

All specifications are subject to change.

 


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