Products: Electrostatic Voltmeter Sensors & Monitors
Model 520 Series HAND-HELD Electrostatic Voltmeter
The Model 520 Series includes the Model 520 and Model 523.
The Trek Model 520 Hand-Held Electrostatic Voltmeter (ESVM) Series products 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 Model 520 series ESVMs 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 520-1 ESVM
Over a spacing range of 5 mm to 25 mm, the 520 voltmeter provides better than a 5% voltage measurement accuracy, while the typical fieldmeter provides a voltage measurement error in excess of 50%. An optional voltage monitor output is available (Model 520-2).
Model 523 ESVM
Over a spacing range of 30 mm to 60 mm, the 523 voltmeter provides greater than a 5% voltage measurement accuracy, while the typical fieldmeter provides a voltage measurement error in excess of 50%.
The 520 series provides a measurement system which complies with standardized calibration equipment traceable to the National Institute of Standards and Technology. The 520 series hand-held voltmeters employ a slender sensor probe design that provides flexibility to make measurements in many locations which are impossible to reach using the large, bulky sensing surfaces of the typical hand-held fieldmeter. The slender design also allows for higher spatial resolution capability by allowing the measurement of small surface areas. A "hold" pushbutton retains the displayed measured voltage value for recording purposes.
ESVM PERFORMANCE
- Model 520 Measurement Range
0 to ±2 kV DC.Model 523 Measurement Range
0 to ±20 kV DC.
Model 520 Accuracy
ESVM Monitor (Model 520-2)
Better than ±5% of full scale over the entire recommended probe-to-surface separation range of 5 mm to 25 mm.Model 523 Accuracy
Better than ±5% of full scale over the entire recommended probe-to-surface separation range of 30 mm to 60 mm.
Model 520 Probe-to-Surface Separation (recommended)
5 mm to 25 mm.Model 523 Probe-to-Surface Separation (recommended)
30 mm to 60 mm.Stability
Drift with Time
Less than 600 ppm/hour, noncumulative.
Drift with Temperature
Less than 600 ppm/°C.
PRODUCT FEATURES
- 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.
Sampling Rate
2.5 readings per second.
Zero Offset
Less than ±1 count.
Model 520 Range
0 to ±1999 V.
Model 520 Resolution
1 V.
Model 523 Range
0 to ±19.99 V.
Model 523 Resolution
10 V.
Power On/Off
A push button.Model 520-2 Voltage Monitor Output
A 1.3 mm jack providing a low-voltage replica of the measured voltage.
Scale
1/1000th of the measured voltage.
Offset Voltage
Less than ±10 mV.
Output Noise
Less than 25 mV rms (measured using the true rms feature of the Hewlett Packard Model 34401A digital multimeter).
Speed of Response (10% to 90%)
Less than 25 ms for an input step change of 2 kV.
Output Impedance
47 ohms.
ACCESSORIES
- Accessories Supplied
- Operator's manual, 9-volt battery, 1.3 mm plug with 3 m unterminated cable (for voltage monitor connection/ 520-2), 2 m coiled snap-on connector-to-alligator clip cable assembly (for ground reference connection).
GENERAL
- Dimensions
31 mm H x 59 mm W x 173 mm D,
(1.2" H x 2.3" W x 6.8"L).
Weight
200 g (7 oz), with battery.
Voltage Monitor Connector
1.3 mm female jack.
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.
CERTIFICATION
The 520 series provides a measurement system which complies with standardized calibration equipment traceable to the National Institute of Standards and Technology. A Certificate of Calibration accompanies each instrument when it is shipped from the factory.
CE COMPLIANCE
The Model 520 series electrostatic voltmeters conforms to the emission standards set by EN-55011:1998 (Group 1, Class B), the immunity standards set by EN-50082-1:1998, and the safety standards set by the EN 61010-1 with all amendments included as of 1995.
Pollution Category
Degree 1: Operate in environments where no pollution or only dry, nonconductive pollution occurs.
Copyright © 2004 TREK, INC. All specifications are subject to change.