5
Troubleshoot
WARNING
Failure to install covers and ground leads could result in serious injury or death.
Install all protective equipment covers and safety ground leads after troubleshooting.
5.1
No response to oxygen concentration change
when heater is cold and thermocouple mV
output is less than setpoint
Potential cause
Thermocouple failure
Recommended actions
1. Check thermcouple continuity.
2. Replace thermocouple or return probe to Rosemount
™
.
Potential cause
Heater failure
Recommended actions
1. Check heater cold resistance.
It should be 67 to 77 ohm.
2. Replace heater or return to Rosemount.
Potential cause
Electronics failure
Recommended actions
1. Triac O/P to heater.
2. Check electronics package.
5.2
No response to oxygen concentration change
when heater is hot and thermocouple mV
output is at setpoint ±0.2 mV
Potential cause
Recorder failure
Reference Manual
Troubleshoot
00809-0100-4880
October 2019
Rosemount Oxymitter DR
67
Summary of Contents for Rosemount Oxymitter DR
Page 4: ...4 ...
Page 52: ...Startup and operate Reference Manual October 2019 00809 0100 4880 52 Emerson com Rosemount ...
Page 72: ...Troubleshoot Reference Manual October 2019 00809 0100 4880 72 Emerson com Rosemount ...
Page 74: ...Return material Reference Manual October 2019 00809 0100 4880 74 Emerson com Rosemount ...
Page 84: ...Replacement parts Reference Manual October 2019 00809 0100 4880 84 Emerson com Rosemount ...