Monroe Electronics Electrostatic Fieldmeter - Static Monitor - model 177A - Manual (Page 18)

17
The standardization procedure is as follows:
 Set up apparatus as outlined above. Set a precision calibrating voltage source to zero volts.
 Set the Model 177A Static Monitor zero control of the selected channel to read a value of
0.000 at its ±10V analog output using a high quality, 4½ digit digital multimeter (DMM).
 Apply calibrating source voltage (V
HV
) shown in Table 2 for the probe model being
standardized.
 Adjust the standardization potentiometer in the probe to produce value (V
IND
), as shown in
Table 2, at the analog output of the selected channel using the same DMM as above.
Probe Model Sensitivity V
HV
V
IND
1036_-3 ±1 kV/cm 2540 V 10.00 V
1036_-4 ±10 kV/cm 2540 V 1.00 V
1036_-5 ±20 kV/cm 2540 V 0.50 V
1036_-6 ±10 kV/in 1000 V 1.000 V
1036_-7 ±1 kV/in 1000 V 10.00 V
Table 2: HV Source and Meter Reading for Probe Standardization
Full Scale Range*
Maximum Surface Voltage
I. Probe II. Probe to Surface
Spacing
inches cm.
20.0 kV 20 kV/cm (-5) 0.4 in 1.0 cm
10 kV/cm (-4) 0.8 in 2.0 cm
10 kV/in (-6) 2.0 in 5.1 cm
1.0 kV/cm (-3) 7.9 in 20 cm
10.0 kV 10 kV/cm (-4) 0.4 in 1.0 cm
10 kV/in (-6) 1.0 in 2.5 cm
1.0 kV/cm (-3) 3.9 in 10 cm.
1.0 kV 1.0 kV/cm (-3) 0.4 in 1.0 cm
*Called “Probe type” in Software
Table 2A: Probe Selection/Sensitivity Chart
Intrinsic Safety (IS) Barriers:
Model 1036E and 1036F Electrostatic Fieldmeter Probes meet Factory Mutual Research Corporation
requirements for Class I, Division 1, Groups C and D hazardous locations when installed in
accordance with the appropriate Monroe Electronics, Inc. control drawings. To comply, approved
safety barriers must be used as shown in the drawings. These drawings are included in Appendix B
– Intrinsic Safety Barriers or are available from Monroe Electronics. Copies of the Factory Mutual
Research Corporation report 1Q3A9.AX specific to these probes are also available on request.