Instruction Manual
D103292X012
C1 Controllers and Transmitters
March 2017
37
Changing Output Signal Range
Use the following information and subsequent procedures when changing the output signal range of the controller or
transmitter. Use the following procedure:
D
For a controller or transmitter
, use this procedure to change from a 0.2 to 1.0 bar (3 to 15 psig) to a 0.4 to 2.0 bar
(6 to 30 psig) output signal range or vice versa (also see figure 19).
D
For a differential gap controller
, use this procedure to change from a 0 and 1.4 bar (0 and 20 psig) to a 0 and 2.4
bar (0 and 35 psig) output signal range or vice versa (also see figure 19).
D
the output signal range selected.
0.4 TO 2.0 BAR (6 TO 30 PSIG)
OUTPUT RANGE
0.2 TO 1.0 BAR (3 TO 15 PSIG)
OUTPUT RANGE
CANTILEVER SPRING
(KEY 8)
CANTILEVER SPRING
(KEY 8)
SPRING
SPACER
(KEY 245)
SPRING
SPACER
(KEY 245)
SPRING
ADJUSTER
(KEY 65)
SPRING
ADJUSTER
(KEY 65)
WASHER
(KEY 64)
WASHER
(KEY 64)
BIAS
SPRING
(KEY 70)
BIAS
SPRING
(KEY 70)
Figure 19. Changing From a 0.2 to 1.0 bar (3 to 15 psig) to a 0.4 to 2.0 bar (6 to 30 psig) Output Signal Range
or Vice Versa
NOTE
REVERSE THE SPRING SPACER AS APPROPRIATE TO CHANGE THE BIAS SPRING WORKING LENGTH.
GG15991-A
1
1
1
Also, make appropriate changes to the nameplate of the controller or transmitter, reflecting the new range selections.
Refer to figure 24 or 25 for key number locations unless otherwise directed.
1. Shut off the supply pressure and process lines to the controller or transmitter.
2. Disconnect the tubing from the mounting base (key 57) and calibration adjuster (key 36).
Disconnect the tubing that connects the pressure block (key 10, figure 22 or 23) to the Bourdon tube or bellows
assembly (key 5 or 52), at the pressure block end.
3. Unscrew the machine screws (key 41, figure 22 or 23), and remove the subassembly from the case.
4. If the controller or transmitter uses a Bourdon tube sensing element disconnect the Bourdon tube from the beam
(key 39) by removing the screw (key 56). Be careful to avoid losing the bearing (key 31). Unscrew the machine
screws (key 55) and remove the washers and Bourdon tube (keys 45 and 5).