Emerson Rosemount Oxymitter 4000 Reference Manual page 101

July 2018
Figure 8-3. Fault 1, Open Thermocouple
LOI
When Fault 1 is detected, the LOI displays the "O
1.
2.
3.
Troubleshooting
Figure 8-4. Fault 2, Shorted Thermocouple
8-7 8-6
Remove power. Unscrew and remove the LOI module from the electronic
assembly.
Reconnect power to the Oxymitter 4000.
Perform the diagnostic steps 1 through 4 shown for the membrane keypad.
Rosemount Oxymitter 4000
T/C Open" message.
2
3. Remove power. Disconnec
resistance across the red a
thermocouple leads. The re
approximately 1 ohm.
4. If the thermocouple is open
Strut Replacement" in Sect
and Service.
LOI
When Fault 1 is detected, the LO
T/C Open" message.
1. Remove power. Unscrew a
LOI module from the electr
2. Reconnect power to the Ox
3. Perform the diagnostic step
for the membrane keypad
101
.