Installation & Operation Manual Merlin GDPX+
GDPXPLUS - IOM Iss: 8 02-21
20
How do I Calibrate a Detector
Access to the interior of the detector or control panel, when carrying out any work, must only be
conducted by trained personnel.
Before carrying out any work ensure local regulations and site procedures are followed.
Do not tamper with or in any way disassemble the detector.
Do not expose gas sensors to concentrations of alcohol found in many products, these may damage,
deteriorate or affect the gas sensing element – such as; wine; deodorants; stain removers; thinners.
1.
Ensure Service mode has been activated on the control panel.
2.
Carefully remove the back cover to access the circuit board and gas sensor.
3.
Reset Detector by shorting out the 1
st
and 3
rd
ICSP pins.
4.
Calibrate
a)
Short out the [Cal1] header to enter calibration mode during the initial warm up period.
b)
Offer up the applicator hose/cone to the gas sensor.
c)
Open the valve/regulator to allow the gas to be delivered at a pre-set flow rate.
d)
The screen will display a ‘SUCCESSFUL’ text when the calibration is complete.
e)
Remove applicator hose/cone and turn the gas cylinder regulator/valve off.
f)
On the control panel – exit Service Mode and press Reset.
At this point, when the system and detector returns to a normal operating state!
5.
Reset Service Message annual reminder by shorting out the unmarked header.
6.
Carefully replace the back cover.
Failed Calibration
Do not reset the service message should the calibration process fail.
If recalibration is unsuccessful a screen text ‘Failed’ will appear. Continue calibration procedure to
reinstate system, the detector will return to normal as it was pre-service and calibration.
Check that the correct gas and concentration has been applied and contact us immediately.
