Honeywell stt850 SMARTLINE User Manual page 62

1. Turn OFF Transmitter power (Power removal is only required in accordance with
area safety approvals. Power removal is only required in Class 1 Div 1
Explosionproof and Class 1 Div 2 environments).
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2. Loosen the end cap lock, and unscrew the end cap from the electronics side of the
Transmitter housing.
3. If equipped with a Display module, carefully depress the two tabs on the sides of the
Display Module, and pull it off.
4. If necessary, unplug the Display interface connector from the Communication
module. Do not discard the connector.
5. Loosen the two retaining screws, and carefully pull the Communication module from
the Electronics compartment.
6. Carefully, insert the Communication module into the Electronics compartment.
7. Tighten the two Communication module retaining screws.
8. Refer to the SmartLine User's Manual to change the FAILSAFE (HART and DE
only), READ/WRITE, and SIM-OFF/SIM-ON configuration settings.
9. If applicable, re-install the Display module as follows:
a) Orient the display as desired.
b) Install the Interface Connector in the Display module such that it will mate with the
socket for the display in the Communication module.
c) Carefully line up the display, and snap it into place. Verify that the two tabs on the
sides of the display latch.
Orient the Display for proper viewing through the end cap window.
You can rotate the meter mounting orientation in 90
10. Apply Parker Super O-ring Lubricant or equivalent to the end cap O-ring before
installing the end cap. Reinstall the End Cap and tighten the End Cap locking screw.
11. Installing Optional External Configuration Button Assembly.
a) Loosen (Do Not Remove) both top nameplate screws and pivot nameplate 90°.
b) Align the protrusion on the button assembly with the matching opening in the
housing and snap the button assembly into the housing.
c) Rotate the nameplate back to the original position, and tighten the nameplate screws.
Page 52
When removing the Communications Module with power applied, the loop
will go to 0V. Likewise, installing a Communications Module into a
transmitter with power applied will cause the loop output value to go to 12 ma
for several seconds then the loop output value will go to the configured value
based on the PV input.
Installing a Display Module into a powered transmitter may cause a temporary
upset to the loop output value.
STT850 Temperature Transmitter User's Manual
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increments.
Revision 3