Instruction Manual
D200160X012
4195K Controllers
July 2018
56
5. Secure the scale with the four self‐tapping screws (key 37).
6. If the controller has remote set point (suffix letter M), perform the appropriate remote set point zero and span
calibration procedure in Section 3, 4, or 5.
7. Perform the appropriate process indicator zero and span calibration and the flapper alignment procedures in
Replacing the Relay
WARNING
Refer to the Maintenance WARNING on page 51.
1. Loosen the two captive screws that hold the relay (key 50) in place.
2. Tip the relay slightly toward the side of the case to clear the output pressure gauge (key 46) and lift out the relay.
3. Make sure the replacement relay has three O‐rings (keys 13 and 15) installed as shown in figure 6‐2. The fourth port
is for exhaust and does not require an O‐ring.
frame.
5. Tighten the two screws that hold the relay in place.
Figure 6‐2. Relay Construction
CLEAN‐OUT
WIRE
RELAY
TAB
EXHAUST PORT
(NO O‐RING
USED)
O‐RINGS
(KEY 15)
RELAY MOUNTING
SCREWS (KEY 10)
W5744
O‐RING
(KEY 13)
6. Perform the appropriate flapper alignment procedure in Section 3, 4, or 5.
Replacing the Case and Cover
WARNING