Good Response With Incorrect Indication - Emerson Rosemount Oxymitter DR Reference Manual

Troubleshoot
April 2022
Recommended actions
Potential cause
No cell mV at probe when test gas applied
Recommended actions
Potential cause
Probe cell mV ok but no input to electronics
Recommended actions
Potential cause
Electronics failure: cell mV satisfactory at both junction box and input to electronics.
Recommended actions
5.3

Good response with incorrect indication

System responds to oxygen concentration changes, but does not give correct indication.
Potential cause
Calibration error
Recommended actions
Potential cause
Air ingress into duct
Recommended actions
60
1. Check recorder chart.
2. See recorder manual.
1. Check cell mV input to electronics and cell mV at probe head.
2. Replace cell or return probe to Rosemount
1. Check cell mV input to electronics and cell mV at probe head.
2. Check cable connection.
1. Check cell mV input to electronics and cell mV at probe head.
2. Check electronics package.
1. Check recorder or remote indicator.
2. Recalibrate recorder or remote indicator. Reference recorder manual.
3. Check system calibration.
4. Recalibrate system.
5. Replace cell if necessary.
1. Check probe mounting and condition of duct.
2. Stop air leaks or resite probe.
Reference Manual
00809-0100-4884
™
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Emerson.com/Rosemount