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Model 344

DC-Stable Electrostatic Voltmeter

! Measurement

Range:

0 to ±2 kV

DC or peak AC

! Accuracy:

Better than 0.05% of

full scale

! Speed of Response:

Less than 3 ms for

a 1 kV step

! Low noise and

drift performance

! A variety of probes

are available for

different installation

requirements

! Precision voltage

monitor output

! Easy-to-read

LED display

The Trek Model 344 is a precision electrostatic voltmeter for

making noncontacting surface voltage measurements in the

range of 0 to ±2 kV DC or peak AC.

The Model 344 employs a field-nulling technique for

noncontacting voltage measurement 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 Model 344 patented probe design eliminates the need for

close tolerance components. This significantly improves noise

and drift performance, both in the presence of contaminating

particulates and under conditions of high humidity and wide

temperature ranges.

A precision voltage 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.

The Model 344 can be operated on a bench top or, with optional

hardware, in a standard 19-inch rack. The rack adapter allows

two 344 units to be mounted together.

The Digital Enable feature provides a connection for a remote

device to turn on and off the high voltage of the instrument. This

makes the 344 suitable for automated or computer-controlled

systems.

The Model 344 is designed to be operated on a bench top.

Measurement and Power Solutions

www.trekinc.com

Summary of content (2 pages)

PAGE 1
Model 344 DC-Stable Electrostatic Voltmeter ! Measurement Range: 0 to ±2 kV DC or peak AC ! ! Accuracy: Better than 0.05% of full scale ! The Trek Model 344 is a precision electrostatic voltmeter for making noncontacting surface voltage measurements in the range of 0 to ±2 kV DC or peak AC. The Model 344 employs a field-nulling technique for noncontacting voltage measurement that achieves DC stability and high accuracy even if the probe-to-surface spacing changes.
PAGE 2
Model 10/40A Specifications Model 344 Specifications All specifications are with a 6000B-8 probe at a probe-to-surface separation of 2 mm. Performance Measurement Range 0 to ±2 kV DC or peak AC. Accuracy Voltage Monitor Better than ±0.05% of full scale. Voltage Display Better than ±0.1% of full scale, referred to the voltage monitor. Speed of Response (10% to 90%) Less than 3 ms for a 1 kV step change. Stability Drift with Time Less than 100 ppm/hour, noncumulative.