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4
OPERATION AND SHUTDOWN
3
(2) Check the signal wiring according to the “Terminal block connection diagram” shown in 4.1
(Page 16).
(3) Vent gas from the transmitter.
Preparation procedure
(4) Perform zero point adjustment.
When the plant requires chemical cleaning at the start of operation, be sure to
close the valve of the transmitter to prevent entry of cleaning liquid into the
pressure receiving unit.
Important
3.1 Preparation for operation
Before operating the transmitter, be sure to perform the following checks and procedures. Note
that adjustment is required in a non-hazardous area for zero point check of intrinsically safe
explosionproof and flameproof transmitters, do not open terminal cover and do not use HHC.
Use the transmitter indicator and the external adjustment screw.
(1) Check for liquid or gas leakagefrom the process
connection, etc. by applying soapy water or the
like.