PEMTECH PT295 - Calibration Errors and Remedies

Flow Chart
Sensor Calibration
User Action Sensor Display / Response
Initiate Calibration via
magnetic switch
CAL
is displayed for 5
to 10 seconds
Sensor makes initial
adjustments
Calib. gas value flashes on
the display and sensor
waits for the gas to be
applied
Apply Calib Gas within 60
seconds to avoid “Calibration Time
Out”. Change the value of
calibration gas being used if
required.
Display flashes calibration gas value at
the slower rate when the gas is
detected by the unit
Apply Calib Gas for 1 ½ minute
Display flashing once every second
1 ½ minute calibration
time ended
AdJ is displayed
for few seconds
Sensor making final
adjustments and recording
calibration data. Do not remove
the gas while ADJ is being
displayed
Remove Calib Gas when display
Starts flashing rapidly
(approximately 5 times per
second)
Display flashes rapidly for about
10 seconds. Returns to normal
operation when sensor has
cleared
Sensor Calibrated Successfully
Wait till display
flashes Calibration
gas value
PT295 Series Toxic Sensor Rev 5.1
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