Trek 320C DC Stable Electrostatic Voltmeter - Manual (Page 2)

Model 320C Electrostatic Voltmeter Trek Certification
Probe
Item Part No.
Model 320C-L (90 to 127 V AC) . . . . . . . . . . . . . . . . . . . . . 320C-L
Model 320C-H (180 to 250 V AC) . . . . . . . . . . . . . . . . . . . . 320C-H
Model 3250 High-Sensitivity Probe . . . . . . . . . . . . . . . . . . . 17014
TREK, INC. certifies that each Model 320C 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.
Performance Features (cont.) Features (cont.)
General
Features
Measurement Range Response Speed Control Voltage Monitor Output
0 to ±100 V DC or peak AC. A front panel potentiometer that A buffered 0 to ±10 V output
adjusts the speed/noise tradeoff of providing a replica of the
Sensitivity the Model 320C AC response. measured voltage.
1 mV. Scale Factors
Voltage Display 10:1 of the measured voltage or
Accuracy 3½ digit LED display. 20:1 of the measured voltage
Voltage Monitor Output Range (switch selectable)
Better than ±0.05% of full scale. Switch selectable for ±10 V Output Current
Voltage Display or ±100 V full scale. 5 mA.
Better than or equal to ±2 counts, Resolution Output Impedance
referred to the voltage monitor. 10 V Range 0.1 W, nominal.
0.01 V.
Speed of Response (10% to 90%) 100 V Range
Less than 300 ms for a 100 V step. 0.1 V.
Zero Offset Dimensions
Stability ±1 count, referred to the 108 mm H x 223 mm W x 370 mm D
Drift with Time voltage monitor. (4.25² H x 8.75² W x 14.5² D).
Less than 50 ppm/hour, Sampling Rate
noncumulative. 3 readings per second. Weight
Drift with Temperature 3.6 kg (8 lb).
Less than 50 ppm/°C Drift/Spacing Null Adjustment
(1:1 monitor output). Voltage Monitor Connector
Less than 100 ppm/°C BNC connector.
(10:1/20:1 monitor output).
Ground Receptacle
Banana jack.
Voltage Monitor Output (1:1 ratio)
Null Voltage Source A buffered 0 to ±100 V output AC Line Cord Receptacle
A calibrated 10-turn dial providing a replica of the measured Standard three-prong line cord with
representing a 10 volt supply, with voltage. integral fuse holder.
switch selectable polarity, used to Scale Factor
produce zero volts output when the 1:1 of the measured voltage. Line Supply
probe is coupled to a known zero Output Noise Factory set for one of two voltage
volt surface. Also used to null Less than 5 mV rms ranges: 90 to 127 V AC or 180 to
contact potentials on dissimilar (measured using the true 250 V AC, at 48 to 63 Hz
surfaces. rms feature of the Hewlett (specify when ordering).
Range Packard Model 34401A
±10 volts digital multimeter). Operating Conditions
Accuracy Output Current Temperature
1% 5 mA. 0 °C to 40 °C.
Resolution Output Impedance Relative Humidity
20 mV. 100 W, nominal. To 90%, noncondensing.
Probe-to-Surface Separation
1 mm (recommended).
This back panel adjustment
minimizes the variation in monitored
voltage values as the probe to test
surface spacing changes.
Model 10/40A Specifications
Model 320C Specifications
Copyright ã 2011 TREK, INC.
All specifications are subject to change.
1122/DEC
Model 320C Ordering Information
All specifications are with a probe-to-surface separation of 1 mm.
TREK, INC. • 190 Walnut Street • Lockport, NY 14094 • USA • 800-FOR TREK
(fax) • www.trekinc.com • [email protected] 716-438-7555 • 716-201-1804