6. 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.
8.2.8 Troubleshooting contacting and toroidal conductivity
analyzers when a fault or warning message is showing
Message Explanation See section
OuEr rAnGe Over range, measurement exceeds display lim-
it
OuEr rAnGE and AMP FAIL
SEnSor FAIL Bad sensor, sensor current is a large negative
number
SEnSor FAIL
CAL Error Calibration error, sensitivity (nA/ppm) is too
high or too low
CAL Error
nEEd 0 CAL Sensor needs re-zeroing, reading is too nega-
tive
nEEd 0 CAL
rtd FAIL Bad temperature reading rtd FAIL, TEMP HI, and TEMP LO
TEMP HI Temperature reading exceeds 275 °C (527 °F)
when auto temp is selected
rtd FAIL, TEMP HI, and TEMP LO
TEMP LO Temperature reading is less than -25 °C (-13 °F)
when auto temp is selected
rtd FAIL, TEMP HI, and TEMP LO
SenSE OPEn Sense line is not connected SenSE OPEn
OFFSEt Err Zero offset during standardization exceeds
programmed limit
OFFSEt Err
FACt FAIL Unit has not been factory calibrated FAct FAIL procedure
CPU FAIL Internal CPU tests have failed CPU FAIL and ROM FAIL
ROM FAIL Internal memory has failed CPU FAIL and ROM FAIL
AdC Error Analog to digital conversion failed 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.
Verify that the wiring is correct and connections are tight. Be sure to check
connections at the junction box if one is being used.
2. Replace the sensor membrane and electrolyte solution and clean the cathode if
necessary. See the sensor instruction sheet for details.
3. Replace the sensor.
SEnSor FAIL
Bad sensor means that the sensor current is a large negative number.
Diagnostics and troubleshooting
88 Rosemount 5081
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