EXTECH
INSTRUMENTS
5
CO50
‐
en
‐
GB_V1.2
12/14
MAXIMUM
READING
Press
the
MODE
▼
button,
the
LCD
will
show
the
maximum
reading
since
the
meter
was
first
powered.
Press
again
to
return
to
the
normal
measurement
mode.
To
clear
the
maximum
reading:
Enter
the
Maximum
mode
and,
when
MAX
Icon
appears,
press
and
hold
the
SET
button,
“Clr”
appears
for
confirmation
of
clear
command.
CO
ALARM
SETTING
1.
Press
and
hold
the
SET
button
for
3
seconds
to
enter
the
setup
mode
2.
Press
SET
again
to
skip
the
Date
setting
(set
the
Date
if
desired
per
earlier
instructions)
3.
Press
SET
again
to
skip
the
Time
setting
(Set
the
Time
if
desired
per
earlier
instructions)
4.
A
flashing
digit
will
appear.
Use
the
up
▲
and
down
▼
arrows
to
increase/decrease
the
alarm
threshold.
Press
SEL/RECALL
to
move
to
the
next
digit.
There
are
3
digit
places
with
a
maximum
setting
of
999pm
(30ppm
is
the
default).
5.
Press
and
hold
SET
for
3
seconds
to
save
and
return
to
the
normal
measurement
mode.
While
alarm
is
tripped,
the
LED
will
flash
red
even
if
“beeper
audio
off”
is
selected.
To
silence
the
beeper
when
in
an
alarm
condition,
press
SET
and
MODE
at
the
same
time.
The
red
LED
will
continue
to
flash,
however,
until
the
environmental
CO
level
no
longer
exceeds
the
default
or
user
selected
Alarm
level.
Remember
to
reactivate
the
beeper
for
future
use.
