Monroe-electronics Electrostatic Voltmeter - Isoprobe® - model 279L Instrukcja Użytkownika Pobierz pdf (Strona 6)

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SECTION 2

INSTALLATION

CAUTION:

Before plugging instrument in, make certain that it is matched to local power line voltage. The factory set line

voltage may be determined by the position of the voltage selector indicator pin in the power entry module. All units

are shipped configured for 120 VAC unless otherwise specified. In the event that it is necessary to change the

operating voltage of the instrument (or inspect or replace the fuses), see Appendix II for more information.

NOTE:

Wire Color Code for Line Cord Provided.

HIGH SIDE OF LINE - BLACK or BROWN

LOW SIDE OF LINE - WHITE or LIGHT BLUE

SAFETY GROUND - GREEN or GREEN/YELLOW

A. Probe mounting:

The 1034 and all other compatible probes must be mounted with the sensitive aperture facing the surface to be

measured.

The probe must be electrically isolated for up to about 400V, since the probe acquires the potential of the surface

being measured.

Further probe mounting information is given in Appendix I.

B. Probe-to-surface spacing:

CAUTION:

When operating at very close probe-to-surface spacing -- BEWARE OF PROBE-TO-SURFACE ARC-OVER and

possible accidental physical contact. Refer to Appendix III for further information.

Probe to surface spacing should be maintained as close as physically reasonable for best performance. Typical

spacing range is from .005” (0.1mm) for unknown voltages below 500 volts to over .125” (3mm) for unknown

voltages up to 3000 volts.

As probe to surface spacing increases instrument performance will suffer:

1. Decreased Accuracy

2. Decreased Speed-of-Response

3. Decreased Surface Resolution

4. Increased Noise

5. Increased Drift

C. System grounding:

The instrument is normally grounded via power cord and the potential measured is referenced to ground. A rear

panel ground connection is provided.

D. Output circuitry:

The output connector is a BNC connector mounted to the rear panel. The output voltage unless otherwise specified

is the measured voltage divided by 100. Normal useable output range is ±3V.

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Monroe-electronics Electrostatic Voltmeter - Isoprobe® - model 279L Instrukcja Użytkownika Strona 6