CPU FAIL and ROM FAIL
CPU FAIL means that the processing unit has failed internal tests. ROM FAIL means that the
internal memory has failed.
1. Cycle the power. Leave the transmitter off for at least 30 seconds before returning
power to it.
If cycling the power fails to clear the error message, the CPU board probably needs
replacing.
2. Call the factory for assistance.
AdC Error
AdC Error means the analog to digital converter has failed.
1. Verify that the sensor wiring is correct and connections are tight. Be sure to check
connections at the junction box if one is being used.
2. Disconnect sensor(s) and simulate temperature and sensor input.
If the transmitter does not respond to simulated signals, the analog PCB has
probably failed.
3. Call the factory for assistance.
8.3 5081-A Diagnostics
8.3.1 Diagnostics overview
The 5081 transmitter can display diagnostic information that is useful in troubleshooting.
The diagnostics available depend on the measurement being made. To read diagnostic
information, go to the main display and press DIAG on the infrared remote controller. Press
NEXT until the mnemonic for the desired information appears. Refer to the approprieate
section below for more information.
8.3.2 Diagnostic messages for dissolved oxygen
TYPE O2 Transmitter is measuring oxygen. Press NEXT to view diagnostics.
SEnSor Cur Press ENTER to display raw current from sensor.
SEnSitvtY Press ENTER to display sensitivity. Sensitivity is calculated during calibration. It is
the measured current divided by the concentration.
O CurrEnt Press ENTER to display the zero current measured during calibration (note units).
bAr PreSS Press ENTER to display the barometric pressure used by the transmitter during air
calibration.
5081-A-Ht This is the model number. Press ENTER to display the software revision (SFtr) lev-
el. Press NEXT to show the hardware revision (HArdr) level.
Diagnostics and troubleshooting
92 Rosemount 5081
To Next Page
Loading...
