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The CVM-780 Contact VoltmeterTM combines the ease of use of a digital voltmeter with the high input impedance and low input capacitance of a true electrostatic voltmeter in a small, portable, battery operated package.
Being a true electrostatic voltmeter, not a field meter means that it reads real voltage, without confusing it with electrostatic field strength, which can be distinctly different.
The CVM-780 Contact VoltmeterTM uses a unique active probe design which is fully guarded and shielded for minimal interference with the surrounding E field.
The Contact VoltmeterTM is powered by rechargeable Nickel Metal Hydride batteries and is a valuable ESD Analysis Tool.
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Specifications
Basic Description
High impedance contact voltmeter with active probe
DC Characteristics
Intended Operating Range: 0 to ¡¾525 volts
Resolution 1 volt, 3 digit display
Circuit accuracy <¡¾1%
Note: Maximum measurement range is ¡¾575 Volts for brief periods
Dynamic Characteristics
Response Time: Approximately 1ms for a voltage step of 200V at the probe tip to the monitor output. Digital display update: 3 readings per second.
Input charge/measurement
Approximately 100 femptocoulomb/volt (1.0x10-13 C/V)
Input Impedance
=1014 ohm in parallel with <1pF Capacitance
Monitor Output
Scale Factor: 10,000:1; 100uV/V (Compatible with Prostat¢â PGA-710 Autoanalysis System¢â)
Recording Deviation
Typically < ¡¾10 volts at ¡¾ 500 Volts
Measurement Tolerances
When measuring DC voltage reference:
500 V Less or Equal to ¡¾2 V
100 V Less or Equal to ¡¾2 V
50 V Less or Equal to ¡¾2 V
10 V Less or Equal to ¡¾1 V
When measuring floating conductors:
500 V Less or Equal to ¡¾5% ¡¾2 Counts
100 V Less or Equal to ¡¾5% ¡¾2 Counts
50 V Less or Equal to ¡¾5% ¡¾2 Counts
10 V Less or Equal to ¡¾10% ¡¾2 Counts
Probe Tips
Metal: Nominally 0.95 and 0.45 inch Ceramic 0.90 and 0.40 inch ¡¾0.05¡±
Portable Operation
Approximately 3.5 Hours on Full Battery Charge
(Operates during Battery Charge)
Power
4 each Energizer NH15-2500 Nickel-Metal Hydride rechargeable batteries (AA Size)
Charger
Universal 90 to 264 Volts, 47 to 63 Hz
What's Included
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