Monroe Electronics Electrostatic Fieldmeter - Static Monitor - model 177A - Manual (Page 13)

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Probe Model Full Scale Sensitivity
1036_-3 ±1 kV/cm (±100 kV/M)
1036_-4 ±10 kV/cm (±1 MV/M)
1036_-5 ±20 kV/cm (±2 MV/M)
1036_-6 ±10 kV/in Standard
1036_-7 ±1 kV/in
Table 1: Probe Model vs. Full Scale Sensitivity
Mounting:
Probe mounting requirements for electrostatic field determinations will vary somewhat with the
nature of the desired measurement. In general, it is best to mount the probe as near as practical to
the surface being monitored, as long as the input signal remains less than the full-scale sensitivity of
the probe. For example, mount the metric unit reading probes from Table 1 at one centimeter and
the English unit reading probes at one inch, if feasible. It is strongly recommended that, where
possible, the probe be mounted "looking" downward in order to minimize the probability of
contaminants entering the aperture in the face.
Model 1036E is provided with two mounting flanges. The case should be electrically connected to
ground. The gradient cap (containing the aperture) of the probe is a reference surface with its own
ground connection. Do not make a separate ground connection to this surface. Stainless steel
hardware is recommended as shown for this connection to avoid long-term corrosion issues.
Model 1036F may be held by hand to make rough measurements, or mounted by means of two
threaded inserts installed in the mounting block. Care must be exercised when selecting screw
length. Other temporary mounting options are friction clamps, adhesives or double-sided tape. The
metal body of the probe is internally connected to instrument ground and should not normally be
connected to any other ground.
Geometry:
A shroud is not necessary on 1036E probes mounted at 1in/1cm or less from the web because the
large faceplate provides the same function as a shroud (creates a uniform field in front of the probe
at one inch or less).