
Figure 8-10: HEATER LED on Membrane Keypad
Recommended actions
1. Remove power.
2. Remove the electronic assembly per .
3. Using a multimeter, measure the resistance across the terminals of heater
connector, J8.
The measurement should be approximately 72 ohms. If the heater is open, see
Fault 5, LOI
When Fault 5 is detected, the LOI displays the
O2 Heater Open
message.
Reference Manual
Troubleshoot
00809-0100-4340
October 2019
Rosemount Oxymitter 4000
127
Summary of Contents for Rosemount Oxymitter 4000
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Page 110: ...HART AMS Reference Manual October 2019 00809 0100 4340 110 Emerson com Rosemount ...
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Page 184: ...Optional accessories Reference Manual October 2019 00809 0100 4340 184 Emerson com Rosemount ...