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

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

0 V

0 20 40

80 100

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