Copyright Pyroban Ltd. Issue 1 Page 11 of 32
Part number PM1083ENG
Starting Gascheka duo
Before the vehicle can be operated, the Gascheka duo flammable-gas detection
system must go through a self-test gas response and calibration check.
1. Place the blue (or green) Dallas Key onto the receptacle on the Control Unit. A
tone will be heard and all indicators on the Control Unit will be illuminated
momentarily to confirm correct operation of the sounder and lamps.
2. The gas test progress indicators (green 1, 2 and 3) will illuminate in sequence as
Gascheka duo carries out an automatic gas test and calibration. This start-up
sequence takes approximately 90seconds for the pellistor head or 30 seconds for
the infrared head.
3. The type of head fitted is displayed in the 7 segment display during the gas test,
once the head type has been determined (during a 20S learning period after
power-on). “I” for infrared and “P” for pellistor
4. Start-up is complete when you see a green tick
on the Control module.
If the gas test is failed refer to the ‘Trouble Shooting’ section.
Use of Dallas keys
The green or blue keys are used to activate the system by initiating a start-up gas test. These
same keys may also be used to return the system into the Sleep mode (vehicle disabled). The
system can be set up to enter the sleep mode automatically if the vehicle is not used for a
period of time (this is detected via a motion sensor). The standard "sleep" period is six hours if
the green key is used and one hour if the blue key is used. The blue key is intended for use on
powered vehicles with 12V (or automotive) batteries, where battery drain is an issue. To
recover from sleep mode, apply either key and the system will be taken through the warm up
and calibration tests.
If a shutdown alarm occurs due to flammable gas readings the red key must be used to reset
the system after which the green or blue key must be used to re-activate the system.
The red key should not be kept with the equipment, but be held by the person
responsible for site safety.
