Wiring
General Wiring Procedures
Warning For hazardous location installations, the cable entries must be
sealed per the installation layout drawing 868695. For non-hazardous
location installations, the cable entries into the enclosures must be sealed to
prevent passage of gas or vapors. The surrounding atmosphere or liquids
should not affect the sealing compound. The minimum thickness of the
sealing compound should be 16 mm (5/8”). ▲
Warning If metal conduit is used, the conduit must be grounded. ▲
Warning Before wiring, verify that the source shutter is in the closed
(OFF) position. ▲
The installation layout drawing 868695 provides general guidance for
routing the cables between the detector and the transmitter. The drawings
below provide instructions on wiring the detector and transmitter.
● 868680-2: Installation wiring, 1400A/1400S transmitter
● 868577: Installation wiring, 9719B/9720B scintillation detector
● 868697: Installation wiring, 9701/9702 ion chamber detector
General Wiring
Procedures
This section provides general instructions for detector and transmitter
wiring. Wiring details, such as power supply connections, are provided in
the remainder of this chapter.
For Scintillation
Detectors
r Scintillation
Detectors
Use the following procedure when wiring 9719B and 9720B scintillation
detectors:
1. Make sure all source shutters are in the “OFF” position.
2. Make sure all power to the gauge is turned off.
3. Remove the housing access cover:
For the 9719B detector, remove the bolts that secure the cover to
the housing.
For the 9720B detector, loosen the screw on the cover retaining
bracket and slide the bracket off of the housing cover. Unscrew the
housing access cover (two lugs are provided on the top of the cover
to aid in the removal of the cover).
4-2 DensityPRO+ Installation Guide Thermo Fisher Scientific
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