16
100106.01
3 Operating
3.1 Switching on and off
Switching on
: Briefly press the
button once.
Switching off
: Press the
button and hold down
for 5 seconds.
After switching on the gas detector will check for the
presence of gas continuously.
The LED above the
button will come on. This LED
will flash if the battery voltage is too low.
The gas detector is switched on automatically when
the power supply is switched on. This is to prevent you
from forgetting to switch it on.
The sensor will have warmed up after about 1 minute and the gas detector can then
detect the presence of gas reliably. A test is carried out while the sensor is warm-
ing up to see if a sensor is connected and if it is functioning correctly.
3.2 Continuous or intermittent check for the presence of gas
The gas detector can be used to check for the presence of gas in either continuous or
intermittent mode according to choice.
The gas sensors are switched on for 1 minute and then off for 2 minutes when in inter-
mittent mode. The average power consumption is lower in this mode than when used
continuously.
The gas detector is set standard to continuous mode.
Changing from continuous mode to intermittent mode or vice versa is done by pressing
the
CONT
button. The green LED above the
CONT
button is on when in continuous mode.
If the fuel shut off valve is opened the gas detector is automatically set to continuous
mode, see 3.7.
Use continuous mode when people are on board.
Use intermittent mode when you are not on board the ship.
3.3 Testing
The working of the gas detector can be tested by activating the test cycle. A false alarm
is given for 7 seconds after pressing the
TEST
button. The following are tested during
this false alarm:
- the working of the sensors
- the working of the acoustic alarm
- the correct functioning of the operation of the fuel shut off valve and the fan; the fuel
shut off valve is closed and the fan switched on.
The gas detector checks continuously that the sensor or sensors are connected and
functioning correctly. An alarm is given if this is not the case.
vetus
SENSOR
1
2
DETECTOR
PETROL VAPOUR - CO
CONT
TEST
Gas detector PD1000