Emerson Rosemount Oxymitter 4000 Reference Manual page 103

July 2018
Figure 8-4. Fault 2, Shorted Thermocouple
LOI
When Fault 2 is detected, the LOI displays the "O
1.
2.
3.
Troubleshooting
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 Shorted" message.
2
2. Remove power and disconn
3. Measure the resistance from
The reading should be appr
4. If so, the short is not on the
thermocouple wiring or the
shorted. See "Heater Strut
Section 9: Maintenance an
LOI
When Fault 2 is detected, the LO
T/C Shorted" message.
1. Remove power. Unscrew a
module from the electronic
2. Reconnect power to the O
3. Perform the diagnostic ste
for the membrane keypad
103