PT395 Series Detector
Calibration Errors, Troubleshooting and Remedies
Displayed
Error Description / Remedies
E-1
The microprocessor was unable to make initial adjustment. The output from
the sensor-element is too high to adjust. This error can occur during step 4 of
the calibration procedure. A short sensor-element could result in this error.
Check if sensor wires are connected properly and firmly to the sensor
terminals.
Check the voltages on SENSOR terminal as follows:
Place the black (ground) probe of the volt meter on the green wire ( − ). With
the red voltmeter probe check to voltage on red wire (+) terminal to be +5
volts ±
0.1. Similarly place the red probe on the black wire and verify the
voltage to be –5 volts ±0.1.
After initial adjustment the unit waits maximum of 60 seconds for the
calibration gas. Calibration is aborted if no calibration gas is detected by the
microprocessor. Check for the leaks in the calibration apparatus and check the
flow rate. Always use a calibration adapter and proper flow rate. A completely
dead sensor could also result in this error.
Not Enough Sensor Reaction to the Gas
At the end of the calibration cycle the microprocessor checks for the adequate
sensor reaction to the calibration gas. This error code is displayed when
sensitivity of the sensor to the calibration gas applied is extremely low and the
microprocessor is unable to make final adjustments. This error can also occur
when there is insufficient flow of the calibration gas to the sensor. Also check if
the calibration gas has not expired and be sure to use the calibration adapter
and check the calibration apparatus and tubing for any leaks.
E-5
The sensor detected the flow of the calibration gas but the sensitivity to the gas
is not consistent. Double check the wires connecting the sensor head. And
repeat the calibration procedure after few minutes. If same error reoccurs the
sensor head assembly must be replaced.
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