Troubleshooting Contacting And Toroidal Conductivity Analyzers When A Fault Or Warning Message Is Showing; Ouer Range And Amp Fail; Sensor Fail - Emerson Rosemount5081 Instruction Manual

Diagnostics and troubleshooting
6.
8.2.8 Troubleshooting contacting and toroidal conductivity
analyzers when a fault or warning message is showing
Message
OuEr rAnGe

SEnSor FAIL

CAL Error
nEEd 0 CAL
rtd FAIL
TEMP HI
TEMP LO
SenSE OPEn
OFFSEt Err
FACt FAIL
CPU FAIL
ROM FAIL
AdC Error

OuEr rAnGE and AMP FAIL

These error messages appear if the sensor current is too high. Normally, excessive sensor
current implies that the sensor is miswired or the sensor has failed.
1.
2.
3.
SEnSor FAIL
Bad sensor means that the sensor current is a large negative number.
88
If the transmitter is simulating an ouput current when the fault occurs, the
transmitter continues to generate the simulated current. To alert you that a fault
exists, the word FAULT appears in the main display, and the display flashes.
Explanation
Over range, measurement exceeds display lim-
it
Bad sensor, sensor current is a large negative
number
Calibration error, sensitivity (nA/ppm) is too
high or too low
Sensor needs re-zeroing, reading is too nega-
tive
Bad temperature reading
Temperature reading exceeds 275 °C (527 °F)
when auto temp is selected
Temperature reading is less than -25 °C (-13 °F)
when auto temp is selected
Sense line is not connected
Zero offset during standardization exceeds
programmed limit
Unit has not been factory calibrated
Internal CPU tests have failed
Internal memory has failed
Analog to digital conversion failed
Verify that the wiring is correct and connections are tight. Be sure to check
connections at the junction box if one is being used.
Replace the sensor membrane and electrolyte solution and clean the cathode if
necessary. See the sensor instruction sheet for details.
Replace the sensor.
See section
OuEr rAnGE and AMP FAIL
SEnSor FAIL
CAL Error
nEEd 0 CAL
rtd FAIL, TEMP HI, and TEMP LO
rtd FAIL, TEMP HI, and TEMP LO
rtd FAIL, TEMP HI, and TEMP LO
SenSE OPEn
OFFSEt Err
FAct FAIL procedure
CPU FAIL and ROM FAIL
CPU FAIL and ROM FAIL
AdC Error
Rosemount 5081