EXTECH
INSTRUMENTS
6
CO50
‐
en
‐
GB_V1.2
12/14
AUDIBLE
ALARM
BEEPER
(ON
/
OFF)
By
default,
the
beeper
is
set
ON,
and
the
LCD
shows
the
bell
icon
on
the
left
side
of
the
LCD
screen.
To
switch
OFF
the
audible
alarm
temporarily:
From
the
normal
measurement
mode,
press
the
SET
+
MODE
▼
button
at
the
same
time
(the
bell
icon
disappears).
After
4
minutes
the
alarm
will
turn
on
again
automatically.
To
comply
with
UL
regulations
(2013),
the
beeper
volume
is
85
dB
at
a
distance
of
3
meters
(9.8
feet).
The
Alarm
beeper
will
sound
when
the
environmental
CO
level
exceeds
the
Default
(30ppm)
or
user
selected
level.
BEEPER
ON
BEEPER
OFF