Trek 325 high-sensitivity,DC stable ESVM

• Measurement Range: 0 to ±40 V DC or Peak AC
• Sensitivity: 1 mV
• Noise: Less than 1 mV rms, Referenced to Measured Voltage
• High Seed of Response: Less Than 3 ms for a 10 V Step
• Voltage Monitor Accuracy: Better Than 0.05% of Full Scale
• Null Voltage Source: 0 to ±10 Volt Calibrated Supply (nulls measured surface contact potential in reference to probe’s gold sensing electrode)
• Drift Spacing/Null Adjustment (minimizes measured variations in
voltage as probe to test surface spacing changes)
• Voltage Monitor Outputs: 1:1 and 10:1 of measured voltage

Model : Trek 325

Q'ty :

The Trek Model 325 Electrostatic Voltmeter is a versatile instrument used for performing noncontacting electrostatic voltage measurements in applications which include contact potential (surface work function) determination, materials evaluation and electret studies. The Model 325 was specifically designed for high sensitivity applications to allow highly accurate, low noise, noncontacting measurement of electrostatic voltages of 0 to ±40 V over a wide range of probe-to-surface distances.

Dimensions
108 mm H x 223 mm W x 370 mm D
(4.25" H x 8.75" W x 14.5" L).

Weight
3.6 kg (8 lb).

Voltage Monitor Connectors
BNC coaxial connectors.

Ground Receptacle
Banana jack.

AC Line Cord Receptacle
Standard three-prong line cord with integral fuse holder.

Power Switch
A rear panel power ON/OFF rocker switch.

Line Supply
90 to 127 V AC at 48 to 63 Hz
(optionally available at 180 to 250 V AC at 48 to 63 Hz).

Operating Conditions Temperature
0 °C to 40 °C.

Relative Humidity
To 85%, noncondensing.

Special features of the Model 325 allow tuning the performance of the unit to compensate for specific test conditions. A calibrated Null Voltage supply of ±10 volts nulls measured surface contact potential when measuring voltages on associated metallic test surfaces. A response Speed Control adjusts the AC response of the Model 325. A Drift/Spacing Null Adjustment minimizes the variation in monitored voltage values as the probe to test surface spacing changes.

A dual range front panel 3½ digit LED display resolves ±10 mV. The measured voltage can also be monitored through a precision 1:1 voltage monitor output and/or a 10:1 voltage monitor output.