Manual

This non-contacting electrostatic voltmeter provides precision

and value for surface voltage measurements in the range of ±3 kV

DC or peak AC. Model 347 utilizes a field-nulling technique for

non-contacting voltage measurement that achieves DC stability

and high accuracy, with no need for fixed probe-to-surface

spacing. This permits the accurate measuring of stationary or

moving surfaces. Patented probe design enhances noise and

drift performance in the presence of contaminating particulate or

under conditions of high humidity and/or wide temperature

ranges.

Trek Model 347

DC-Stable Electrostatic Voltmeter

Key Specifications

! Measurement Range: 0 to ±3 kV DC or peak AC

! Measurement Accuracy: Better than 0.05% of full scale (monitor)

! Speed of Response: Less than 3 ms for a 1 kV step (10% to 90%)

Typical Applications Include

! Surface voltage measurements of photoconductors or dielectric surfaces

! Charge monitoring in semiconductor production

! Measuring of electrostatic potentials on film, polymers, and paper

Features and Benefits

Superb noise and drift performance

Precision voltage monitor output

Monitor provides a low voltage replica of the measured electrostatic potential for

monitoring purposes or for use as a feedback signal in a closed loop system

Digital Enable allows an external device to turn the internal HV power supply on/off

Well-suited for automated or computer-controlled systems

Easy-to-read LED display

Large selection of optional probes offer versatility (order separately)

Can be operated on a bench top, or with optional hardware, in a standard 19-inch rack

NIST-traceable Certificate of Calibration provided with each unit

compliant

TREK, INC. • 190 Walnut Street • Lockport, NY 14094 • USA • 800-FOR TREK

585-798-3140 • 585-798-3106 (fax) • www.trekinc.com • sales@trekinc.com

Available Probes

Standard Resolution High Resolution

PN 6000B-7C: End-viewing, round body PN 6000B-5C: End-viewing, round body

PN 6000B-8: Side-viewing, round body PN B000B-6: Side-viewing, round body

PN 6000B-15C: End-viewing, square body PN 6000B-13C: End-viewing, square body

PN 6000B-16: Side viewing, square body PN 6000B-14: Side-viewing, square body

Miniature High Temperature (up to 100°C)

PN 555P-4: End-viewing, square body PN 6300-7: End-viewing, square body

PN 555P-1: Side-viewing, square body PN 6300-8: Side-viewing, square body

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Trek Model 347 DC-Stable Electrostatic Voltmeter This non-contacting electrostatic voltmeter provides precision and value for surface voltage measurements in the range of ±3 kV DC or peak AC. Model 347 utilizes a field-nulling technique for non-contacting voltage measurement that achieves DC stability and high accuracy, with no need for fixed probe-to-surface spacing. This permits the accurate measuring of stationary or moving surfaces.
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Model 347 Specifications Performance Measurement Range Mechanical Dimensions 108 mm H x 233 mm W x 357 mm D (4.25” H x 8.75” W x 14” D) Weight 3 kg (6.6 lb) 0 to ±3 kV DC or peak AC Measurement Accuracy Better than ±0.05% Voltage Monitor Output Connector BNC connector Voltage Monitor Output Voltage Display Better than ±0.