7
2 Features
2
Features
2.1
Visual and audible signals
The device features two alarms:
● Signal light on top of device (visual signal)
● Buzzer on side of device (audible signal)
If this symbol appears on the display, the audible
signal can be switched off.
When an audible signal has been switched off it
cannot be switched back on while the concentration
level remains above the alarm threshold.
This symbol appears at the top left of the display as
soon as the audible signal has been switched off. It
disappears automatically if the level falls below the
alarm threshold.
Alarm
If the measured hydrogen gas concentration exceeds specified
limit values (alarm thresholds) the device gives a warning. It emits
both audible and visual signals.
The device has two alarms:
●
ALPPM
(adjustable alarm in the ppm range)
●
ALEOS
(alarm at the end of the measuring range)
Note:
Alarms are only emitted in the
Inspection above ground
and
House
applications.
There are no alarms in the
Measuring in bar holes
and
Gas
measuring
applications.
The
ALPPM
alarm signal cycles between on and off. The
ALEOS
alarm signal comprises a continuous tone and a steady light.
There is detailed information on alarms in