Emerson Rosemount Oxymitter 4000 Reference Manual page 105

July 2018
Figure 8-5. Fault 3, Reversed Thermocouple
LOI
When Fault 3 is detected, the LOI displays the "O
1.
2.
3.
Troubleshooting
8-9
Remove power. Unscrew and remove the LOI module from the electronic
assembly.
Reconnect power to the Oxymitter 4000.
Perform the diagnostic steps 1 through 3 shown for the membrane keypad.
Rosemount Oxymitter 4000
T/C Reversed" message.
2
TP3+ to TP4-. If the reading
thermocouple wiring is
2. Check red and yellow wires
connector for the proper pla
3. If the wiring is correct, the fa
board. See "Electronic Asse
Replacement" in Section 9:
Service.
LOI
When Fault 3 is detected, the LOI
T/C Reversed" message.
1. Remove power. Unscrew and re
module from the electronic as
2. Reconnect power to the Oxym
3. Perform the diagnostic steps 1
shown for the membrane keyp
105
rev