Monroe Electronics Electrostatic Fieldmeter - Static Monitor - model 177A - Manual (Page 36)

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APPENDIX I
PROBE CONNECTION OPTIONS
There are at least six wiring options for the Model 177A with regards to the Model 1036E or 1036F
probes. The first three options are for non-hazardous (non-classified) locations where there are no
Intrinsic Safety (IS) considerations. The last three options are for hazardous (classified) locations
where Intrinsic Safety (IS) must be considered as part of the installation.
OPTION 1:
All probes (1036E or 1036F) use factory installed cables, no extension cables, no IS
considerations
Probes are normally factory equipped with ten-foot-long cables. To use or test this
system, simply plug the probes into the appropriate connectors on the back of the
instrument.
OPTION 2:
Probes use factory-installed cables and factory supplied extension cables, no IS
considerations
Extension cables are available in lengths up to 1000 feet. The extension cable order
number is 1036/12-XXXX where "XXXX" denotes the length of the cable in feet.
Factory supplied extension cables will be labeled with this part number near one
end.
The connector at one end mates with the connector on the end of the cable attached
to the probe and the one on the other end mates with the appropriate connector on
the back of the instrument. Although it is virtually impossible to err, it is advisable to
test the system "on the bench" in a confined area before permanently installing long
cable runs.
OPTION 3:
1036E probes with long customer installed cables with or without extension cables,
no IS considerations (see Figure A-I-1)
Wiring connections for customer installed 1036E probe cables for use in a non-IS
installation are shown in Figure A-I-1. Model 1036E probes have terminal blocks
inside their housings to which the cable wires are directly attached.
Note: 1036F probes have permanently attached cables and that this option does not
apply.
As in OPTION 2, it is advisable to "bench test" the system before removing the
factory-attached cables.
There are a couple of valid reasons for constructing your own cables:
a. You may be able to save money, although, in the long run,
troubleshooting may prove to be more costly than using factory-supplied
cables.
or
b. It is necessary to pull the cable through a fairly long run of conduit and
the connector won't fit. The largest rectangular cross sectional
dimensions of each connector are
5 /
8
" x 1 1 /
4
". The minimum conduit ID
through which this can be pulled is 1 3 /
8
", although, it would be possible,
with a great deal of care, to pull up to five cables simultaneously through
that ID in a smooth straight run by staggering the connectors.