AT-G-DETECT
Gas Sensing System
LEAK DETECTION SOLUTIONS
4
8. Tighten on the ampoule until it shatters
allowing the content to di
ff
use in the
beaker. It should be left in place for
approximately 5 min.
9. Voltage output will increase. This con
fi
rms
that the sensor is responding. In the case
of ampoules a response equivalent to 50%
F. BUMP TEST USING GAS AMPOULES
or greater of the ampoule concentration
will be satisfactory.
10. Carefully remove any ampoule remains
from the gas detector, replace yellow cap
(only CO2 sensors), and replace the sensor
enclosure.
Remove the enclosure lid of the gas sensor and controller (non applicable to Exd Remote
sensor and vent pipe model, 1L units as monitoring of voltage can be done on controller) if
this is a CO2 unit also remove the yellow cap on the calibration port, if on your model.Connect
the voltmeter to the controller to monitor sensor response. Expose the sensor to gas from the
cylinder. You can place the entire sensor into a plastic bag or use a plastic hose/hood to direct
gas to the sensor head.
G. CALIBRATION
The alternatives we describe are:
• Exchanging the sensor board – only
available for 2 level units
• Gas Calibration
H. EXCHANGING THE SENSOR BOARD
Aquilar recommends exchanging your PCB for a newly pre-calibrated certi
fi
ed unit every 3 years
TOOLS REQUIRED
• A pre-calibrated sensor board
• A voltmeter – crocodile clips recommended
• Estimate 10 min per sensor
EXCHANGINF THE SENSOR
1. Power o
ff
the unit and remove lid of
sensor enclosure.
2. Note the colour code of the cable in
positions 1,2,3,and 4 of the connector
block.
3. Undo the cable and 2 screws securing
sensor board and remove.
4. Fit the new pre-calibrated sensor and
reconnect the cable in the correct colour
sequence at positions 1,2,3 and 4.
Unit 30, Lawson Hunt Industrial Park,
Broadbridge Heath, Horsham, West Sussex,
RH12 3JR
+44 (0) 1403 216100
info@aquilar.co.uk
www.aquilar.co.uk
