Trek 520 User Manual
Trek Model 520 Series
Hand-Held Non-Contacting Electrostatic Voltmeters
The Trek Model 520 (±2kV) and Model 523 (±20kV) Hand-Held Electrostatic
Voltmeters provide accurate, noncontacting measurements of electrostatic
surface voltage for ESD applications in either ionized or non-ionized
environments.
These two voltmeters utilize a measurement technique that overcomes the
disadvantage of the typical hand-held field-meter by providing surface voltage
measurements which are essentially independent of the sensor probe-tomeasured surface spacing.
Model 520 is available in two versions. The 520-1 has a digital meter to
display the measured voltage. The 520-2 has an analog output monitor in
addition to the digital display. This analog output monitor can be used to
Model 520
Model 523
Model 520 Key Specifications
record the measured voltage or to view it on an oscilloscope.
Measurement Range:
!
Measurement Accuracy:
!
0 to ±2 kV DC
Better than ±5% of full scale over the entire recommended probe-to-
surface separation range of 5 mm to 25 mm
Speed of Response (10% - 90%): Less than 25 ms for a 0 to ±2 kV input step change
!
(520-2 Voltage Monitor Output)
Model 523 Key Specifications
Measurement Range:
!
Measurement Accuracy:
!
Sampling Rate: 2.5 readings per second
!
0 to ±20 kV DC
Better than ±5% of full scale over the entire recommended probe-to-
surface separation range of 30 mm to 60 mm
Typical Applications Include
! Measurement of electrostatic surface charge build up
!
Manufacturing processes
!
Electronic assembly testing
!
Semiconductor material testing
!
Dissipative material testing
!
Automotive electronics testing
ESD Auditing and troubleshooting
!
Features and Benefits
Accurately measures surface voltage at a wide range of spacings
!
No need to maintain a fixed spacing
!
Chopper stabilized for drift-free operation in ionized environments
!
!
NIST-traceable Certificate of Calibration provided with each unit
!
compliant
TREK, INC. • 190 Walnut Street • Lockport, NY 14094 • USA • 800-FOR TREK
716-438-7555 • 716-201-1804 (fax) • www.trekinc.com • sales@trekinc.com
Common Features
Power On/Off
Push-button switch
Stability
Drift with Time
Less than 600 ppm/hour, noncumulative
Drift with
Temperature
Less than 600 ppm/°C
Operating Time
Approximately 8 hours with a full battery
Hold
A momentum push-button will command the
voltage display to hold the value displayed
until the switch is released
Voltage Display Range
A 3 ½ digit liquid crystal display
Model 520
0 to ±1999 V
Model 523
0 to 19.99 kV
Resolution
Model 520
1 V
Model 523
10 V
Zero Offset
Model 520
Less than ±1 count
Model 523
Less than ±4 counts
Sampling Rate
2.5 readings per second
Power Requirements
One (1) 9-volt NEDA 1604 battery, IEC 6R61
battery or equivalent
Ground Receptacle
Snap-on connector
Operating Conditions
Temperature
15°C to 35°C
Relative Humidity
To 85%, noncondensing
Supplied Accessories
Operating Instructions (Model 520) PN: 23100
Operating Instructions (Model 523) PN: 23099
Ground Reference Cable Assembly PN: N9079
9-volt Battery PN: F1003R
Optional Accessories
Carrying Case
PN: 43469
Model 520 and 523 Specifications
Model 520 Performance
Measurement Range
0 to ±2 kV DC
Measurement
Accuracy
Model 520-2 contains an analog monitor output (1.3 mm jack) which
provides a low-voltage replica of the measured voltage.
Ratio
1/1000th of the measured voltage
Speed of Response
(10% to 90%)
Less than 25 ms for an input step change of
2 kV
Output Impedance
47 W
Model 520 Mechanical
Dimensions
31 mm H x 59 mm W x 173 mm D
(1.2” H x 2.4” W x 6.8” D)
Weight
200 g with battery
(7 oz.) with battery
Model 523 Performance
Measurement Range
0 to ±20 kV DC
Measurement
Accuracy
Model 523 Mechanical
Dimensions
31 mm H x 59 mm W x 183 mm D
(1.2” H x 2.4” W x 7.3” D)
Weight
200 g with battery
(7 oz.) with battery
Model 520 Compared to Typical Fieldmeter
Displayed Voltage vs. Probe-to-Surface Separation
V x 2
Displayed
Voltage
V
0 V
0 10 20 30 40 50
Probe-to Surface Separation (mm)
Surface Voltage
520 Performance
Typical Fieldmeter
Model 523 Compared to Typical Fieldmeter
Displayed Voltage vs. Probe-to-Surface Separation
Model 523 Compared to Typical Fieldmeter
Displayed Voltage vs. Probe-to-Surface Separation
V x 2
Displayed
Voltage
V
0 V
0 20 40
80 100
60
Probe-to Surface Separation (mm)
Surface Voltage
523 Performance
Typical Fieldmeter
*Measured using the true rms feature of the Hewlett Packard Model 34401A digital multimeter
Measurement and Power Solutions
Copyright © 2013 TREK, INC. All specifications are subject to change. 1332/JRB
TM
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