The Trek Model 347 is a precision DC stable electrostatic voltmeter for making noncontacting surface voltage measurements in the range of 0 to ±3 kV DC or peak AC. Industrial applications include surface voltage measurements of photoconductors or dielectric surfaces, charge monitoring in semiconductor production, or measuring electrostatic potentials on film, polymers, and paper.
The Model 347 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 347 patented probe design, when compared to other probe designs, significantly improves noise and drift performance in the presence of contaminating particulates or under conditions of high humidity and wide temperature ranges.
The Digital Enable feature provides a connection for a remote device to turn on and off the internal high-voltage power supply. This makes the Model 347 suitable for automated or computer-controlled systems.
A precision voltage monitor provides a low-voltage representation of the measured electrostatic potential for monitoring purposes, or for use as a feedback signal in a closed-loop system.
PERFORMANCEAll specifications are with a 6000B-8 probe at a probe-to-surface separation of 2 mm. Measurement Range Accuracy Speed of Response (10% to 90%) Stability PRODUCT FEATURESZero Control Response Control Voltage Monitor Output Voltage Display |
Digital Enable PROBE Probe-to-Surface Separation (recommended) Standard Resolution Probes High Resolution Miniature High Temperature (up to 100 °C)
ACCESSORIESAccessories Supplied Operator’s manual and line cord. Optional 603RA Full-Rack Mounting Kit 6003B Probe Line Driver (required when a very long probe extension cable is used)* 6004B-EC Probe Extension Cable (from 347 to line driver)* 6005B-EC Probe Extension Cable (from 347 to probe)*
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GENERALLine Supply Operating Conditions Dimensions Weight Voltage Monitor Connector Digital Enable Connector Ground Receptacle AC Line Cord Receptacle CERTIFICATIONTREK, INC. certifies that each Model 347 is tested and calibrated to specifications using measurement equipment traceable to the National Institute of Standards and Technology or traceable to consensus standards. A Certificate of Calibration accompanies each instrument when it is shipped from the factory. All specifications are subject to change.
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