PERFORMANCE

Measurement Range
0 to ±2 kV DC or peak AC.

Accuracy a t the Voltage Monitor Output
Better than ±0.1% of full scale.
Accuracy a t the Voltage Display
Better than ±0.1% of reading ±1 digit (referred to measured input).

Large Signal Bandwidth (-3 dB)
DC to greater than 400 Hz.

Small Signal Bandwidth (-3 dB)
DC to greater than 5 kHz.

Input Characteristics
Resistance greater than 1 x 10¹⁵ Ω.
Capacitance less than 1 x 10^-15 F.

Stability
Drift with Time (at 22 °C)
Less than 6 V/minute, accumulative [referred to input].

PROBE

Model 820 Probe
Probe connects to the front panel and may either be hand-held or mounted to a clamping device.

Sensor
0.8 mm conducting ceramic electrode (sensors may be easily replaced
dependent on the measurement requirements).

ACCESSORIES

Model 820P probe, operator’s manual, PC software, AC/DC Universal Power Cube, and ground cord.

Orientation
Pencil probe structure with end contact sensor.

Probe Dimensions
152 mm L x 20 mm Diameter
(6" L x 0.75" Diameter)

Probe Cable Length
1.5 m ±76 mm (5.3 ft. ±3 in.).

GENERAL

Power Requirements
Available for all nominal line voltages, the Universal wall cube provides the following input power to the ESVM:
Voltage
24 V DC, ±5% @ 1 Amp.
Input Connector
2.1 mm DC power plug.

Dimensions
10.2 cm H x 22.9 cm W x 33 cm D
(4" H x 9" W x 13” D)

Weight
1 kg (2.2 lb).

Voltage Monitor Connector
BNC connector.

Digital Enable Connector
BNC connector.

Reset Connector
BNC connector.

USB Port
Type B port.

Ground Receptacle
Threaded ground stud.

Operating Conditions
Temperature
10 °C to 35 °C.
Relative Humidity
To 75%, noncondensing.

Power ON/OFF
A momentary push-button.

Probe Connector Location
Front panel

PRODUCT FEATURES

Digital Enable
An open collector, TTL compatible input to enable or
disable the unit’s high-voltage measurement. A TTL high
will disable while a TTL low will enable the measurement.

Voltage Display
3½ digit LED display.
Range
0 to ±1999 V.
Resolution
1 V.
Zero Offset
Less than or equal to ±1 count.

Voltage Monitor Output
A BNC provides a buffered low-voltage replica of the measured voltage.
Scale Factor
1 V/200 V (standard).
Output Current
±5 mA (minimum).
Output Noise
Less than 10 mV rms.
Output Impedance
Less than 0.1 Ω.

USB Connector
Allows data transfer to a computer with a sampling rate of 1 ms or 10 us between data points (stream data or block data transfer protocols). PC software records and graphs the unit's output.

Reset Button/Connector
A momentary front panel push-button switch or rear panel external TTL input signal initiates a reset function. A momentary TTL low signal will initiate the reset function. A TTL high (or open) allows normal operation.

CERTIFICATION

TREK, INC. certifies that each Model 820 is tested and calibrated to specifications using measurement equipment traceable to the National Institute of Standards and Technology or to consensus standards.

Pollution Category
Degree 1: Operate in environments where no pollution or only dry, nonconductive pollution occurs.

All specifications are subject to change.