36
TN4FCXA2
j
-EDF-
E
5.2 Operating mode
(1) Effective (FKG) or absolute (FKA) pressure transmitters:
Open
Slowly open the isolation valve to apply the pressure.
When the pressure is applied, the transmitter is operational.
(2) Differential or flow pressure transmitters (FKC):
The use of the isolation valves when switching on the differential pressure of the transmitter
is shown below:
Open
Close the isolation
valve on the low
pressure side.
Close the
isolation valve
HP side
By-pass valve
Open
Close
Check that the by-pass valve is open and
adjust the zero of the transmitter.
Slowly open the isolation valve of the HP side.
Close the by-pass valve.
