Reference Manual
00809-0100-4809, Rev DA
Section 4: Operation and Maintenance
September 2015
75
Operation and Maintenance
Section 4 Operation and Maintenance
Safety messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 75
RTD maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 75
Pak-Lok, Flange-Lok, and Flo-Tap maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 79
Gas entrapment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 80
Dirt accumulation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 80
Main steam line Annubar sensor maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 81
4.1 Safety messages
Procedures and instructions in this section may require special precautions to ensure the safety
of the personnel performing the operations. Information that raises potential safety issues is
indicated by a warning symbol ( ). Refer to the following safety messages before performing
an operation preceded by this symbol.
4.2 RTD maintenance
This section covers RTD maintenance procedures.
4.2.1 Replacing an RTD
Note
For RTD replacement of the Compact Annubar Flowmeters, see Reference Manual (document
number 00809-0100-4810).
Direct mount
If an RTD needs to be replaced on a direct mounted Annubar Flowmeter, proceed as follows:
Explosions can result in death or serious injury.
Do not remove the instrument cover in explosive environments when the circuit is live.
Both transmitter covers must be fully engaged to meet
explosion-proof requirements.
Before connecting a communicator in an explosive atmosphere, make sure the
instruments in the loop are installed in accordance with intrinsically safe or
nonincendive field wiring practices.
Electrical shock can result in death or serious injury.
Avoid contact with the leads and the terminals.
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