Replacing The Relay; Replacing The Case And Cover - Emerson Fisher 4195KA Instruction Manual

4195K Controllers
July 2018
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
Section 3, 4, or 5.

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.
4. Install the replacement relay, making sure the tab on the relay, shown in figure 6‐2, aligns with the tab on the
frame.
5. Tighten the two screws that hold the relay in place.
Figure 6‐2. Relay Construction
CLEAN‐OUT
WIRE
RELAY
TAB
W5744
6. Perform the appropriate flapper alignment procedure in Section 3, 4, or 5.

Replacing the Case and Cover

WARNING
Refer to the Maintenance WARNING on page 51.
56
EXHAUST PORT
(NO O‐RING
USED)
O‐RINGS
(KEY 15)
O‐RING
(KEY 13)
RELAY MOUNTING
SCREWS (KEY 10)
Instruction Manual
D200160X012