Owner's manual

The Trek Model 341B is a DC-stable, precision electrostatic

voltmeter for making noncontacting surface voltage

measurements. The 341B employs a field-nulling technique that

achieves DC stability and high accuracy even if the probe-to-

surface spacing changes. This permits measurements of either

stationary or moving surfaces without the need to establish fixed

spacing to maintain accuracy. The instrument also utilizes a

patented probe design that eliminates the need for close tolerance

components which significantly improves noise and drift under

conditions of high humidity and wide temperature ranges.

Trek Model 341B

High-Speed, High-Voltage Electrostatic Voltmeter

Key Specifications

! Measurement Range: 0 to ±20 kV DC or peak AC

! Measurement Accuracy: Better than ±0.1% of full scale

! Speed of Response: Less than 200 µs for a 1 kV step

Typical Applications Include

! Charge accumultion monitoring of LCD production processes

! Monitoring surface potentials in the electrostatic painting process

! Measuring of electrostatic potentials on polymers, rubber, fabrics 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

Easy-to-read LED display

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

716-438-7555 • 716-201-1804 (fax) • www.trekinc.com • sales@trekinc.com

Available Probes Available Configurations

Standard Resolution Model 341B

PN 17157: Model 3450 Side-viewing PN 341B-L, 341B Electrostatic Voltmeter (90-127 V AC)

PN 341B-H, 341B Electrostatic Voltmeter (180-250 V AC)

High Temperature (up to 100°C) Model 341B-1 (for use with 3460-1 Line Driver)

PN 17284 Model 3455ET End-viewing PN 341B-1-L, 341B-1 Electrostatic Voltmeter (90 to 127 V AC)

PN 17285 Model 3453ST Side viewing PN 341B-1-H, 341B-1 Electrostatic Voltmeter (180 to 250 V AC)

PN 17181, Model 3460 Line Driver (used with 341B-1)

(Model 341B-1 utilizes a separate line driver for extended probe cable lengths)

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Trek Model 341B High-Speed, High-Voltage Electrostatic Voltmeter The Trek Model 341B is a DC-stable, precision electrostatic voltmeter for making noncontacting surface voltage measurements. The 341B employs a field-nulling technique that achieves DC stability and high accuracy even if the probe-tosurface spacing changes. This permits measurements of either stationary or moving surfaces without the need to establish fixed spacing to maintain accuracy.
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Model 347 Specifications Performance Mechanical Dimensions 230 mm H x 441 mm W x 432 mm D (9.06” H x 17.36” W x 17” D) Weight 17 kg (37 lb) Measurement Range 0 to ±20 kV DC or peak AC Measurement Accuracy Better than ±0.1% of full scale, referred to the voltage monitor Voltage Monitor Output Connector BNC connector Speed of Response (10% to 90%) Less than 200 µs for 1 kV step.