|Analog output reading is unchanging and appears incorrect.
||Analog output is in error state.
||Remove the cause of the error state and the analog output recovers
its normal function.
|Probe outputs stars "****" on serial line instead of measurement
||Incorrect supply voltage.
||Check the power supply. Check the active errors using the
ERRS command on the serial line.
|Unsuitable operating environment.
||Verify that the operating environment is within specified operating limits.
|Unable to access probe on RS-485 line.
||Check that the RS-485 connection is wired correctly.
||Power cycle or reset the probe and try again.
||Probe in POLL mode with unknown address.
||Issue the ?? command to make the probe output its information.
Then use the OPEN command to open a line to the probe’s
|CO2 measurement not working.
||Condensation on the sensor.
||Remove the PTFE filter and check if condensation has formed on the sensor. If yes, dry out the condensation with instrument air and insert a new dry filter. Keep the probe powered and operating to prevent re-occurrence.