Temperature Sensor Replacement (Mta Option Only) - Emerson Rosemount 8800D Series Reference Manual

Troubleshooting
May 2016
Note
Do not rotate the housing while the sensor cable is attached to the base of the housing. This
will stress the cable and may damage the sensor.
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5.6.9

Temperature sensor replacement (MTA option only)

Replacement of the temperature sensor should only be necessary in the event of a failure.
Use the following procedure for replacement.
Note
Disconnect power before replacing temperature sensor.
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2.
Note
Use plant approved procedure for removing a temperature sensor from a thermowell.
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4.
Note
This will expose the electronics to the atmosphere.
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Place the electronics housing into the top of the support tube.
Use a hex wrench to turn the three housing rotation screws counterclockwise to
engage the support tube.
Replace the access cover on the support tube (if present).
Tighten the screw on the access cover (if present).
Turn off power to Rosemount 8800D.
Remove temperature sensor from meter body by using a
Remove temperature sensor from electronics by using a 2.5 mm hex wrench to
remove hex socket screw from electronics.
Gently pull temperature sensor from electronics.
Insert new temperature sensor into electronics housing using care to align pin and
cap head screw to align connector pins.
Tightening cap head screw with 2.5 mm hex wrench.
Slide bolt and ferrule assembly onto temperature sensor and hold into place.
Insert temperature sensor into hole in bottom of meter body until it reaches the
bottom of the hole. Hold it in place and tighten bolt with
until / turns past finger tight to seat ferrule.
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4
Reapply power to Rosemount 8800D.
Reference Manual
00809-0100-4004, Rev DC
/ -in. open end wrench.
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2
/ -in. open end wrench
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2
Troubleshooting