www.watchgas.eu
D e t e c t i o n
17
D e t e c t i o n
AirWatch MK 1.2
User Manual
9. Operation And Trouble shooting
9.1 ALARM
When the AirWatch detects a dangerous concentration of gas, it will break a potential- free contact, using an M.S.A (Motor
Stop Automatic) plug to turn off a diesel-operated or an electric switch box. A red light on the AirWatch indicates that there
is an alarm.
We recommend having the area inspected by an authorized gas analyst. The AirWatch can only be reset after the
concentrations measured have dropped below the alarm values. When the default values appear again, reset the alarm.
The red LED is on continuously and the green LED is flashing. This reset is achieved by holding down the alarm reset
button. This option is configurable, and we recommend a manual reset if you are using a power unit or breathing air
machine.
AirWatches with a wireless option will carry out an automatic reset
when the values have dropped below the alarm threshold.
10.2 TROUBLESHOOTING
1. Error calibrating. The sensors are unstable during the calibration
procedure. Repeat the calibration process. Incorrect calibration
gas. If the problem occurs repeatedly, contact your distibutor.
2. Sensor fail. Sensor(s) are not recognized by the device. Restart
the device and if the problem occurs repeatedly, contact your
distributor.
3. NEG alarm. Unstable sensors. Have the device stabilized and carry
out a fresh-air calibration in a safe and clean environment.
4. Pump Blocked. Supply hose or filter is blocked. Remove the
blockage and press ‘alarm reset’ to reset the alarm.
5. Bump Fail. Incorrect bump gas, sensors unstable. Repeat bump
test. If the problem occurs repeatedly, contact WatchGas.
6. Invalid Configuration. Try to reconfigure your device with the
configuration software if problem occurs repeatedly contact
WatchGas for repair
7. If the Green and RED LED indicators are blinking
RED>GREEN>RED>GREEN there’s a lockup detected and the
AirWatch prepares to reboot.
Error calibrating
00
0.0
20.9
LEL
CO
H2S
OXY
FAIL
FAILF
AIL
FAIL
LEL
CO
H2S
OXY
0
NEG 0.0
21.9
!!
Flow Fault
!!
OK
OK
OK
OK
LEL
CO
H2S
OXY
00
0.0
20.9
Bump result: FAIL
00 0.0
20.9
Bump result: FAIL
please
remove
gas
1
2
3
4
5
Red LED. The AirWatch alarm is activated. A gas concentration higher than
the alarm values has been detected, or the pump is blocked.
Red LED is on continuously and green LED is flashing. The AirWatch can be reset
with the alarm/ reset button.
6
4
5
