Form creation date: 01.04.2008
Document creation date: 13.01.2020
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3.4 Alarm
fig. 11
fig. 12
fig. 13
fig. 14
fig. 15
When switching on the METREX2, the acoustic alarm is activated and the LED (fig.11) is lit
up.
The user can deactivate and reactivate it by pressing the alarm ON/OFF button (3) (fig.1 e
fig.12) according to his requirements.
If the acoustic alarm is deactivated but the concentration measured exceeds the preset
alarm limit, in any case the optical alarm LED (9) (fig.1 and fig.13) blinks.
The alarm thresholds are adjustable both in the PPM and in the VOL range. Press button
(3) (fig.1 e fig.12) for more than 2 seconds to see the alarm limit actually set. It can be
altered by holding this button (3) pressed and additionally pressing the PPM/VOL button
(4) (fig.1 and fig.14) for increasing or the zero-button (5) (fig.1 and fig.15) for decreasing
the value.
Because also the acoustic alarm is switched on or off with button (3) it is recommended
to check the wanted display mode after adjusting the alarm limit.
