EXTECH
INSTRUMENTS
3
FM100
‐
en
‐
GB_v1.7
6/16
Operation
Powering
the
meter
If
the
meter
is
supplied
without
batteries
installed,
install
the
supplied
batteries
in
the
rear
battery
compartment
to
power
the
meter.
Please
observe
proper
polarity.
If
the
meter
is
supplied
with
the
batteries
installed,
and
a
protective
battery
strip
is
installed
in
the
battery
compartment,
remove
the
protective
strip
to
power
the
meter.
Alternatively,
plug
an
AC
adaptor
into
the
jack
on
the
side
of
the
meter
and
then
into
an
AC
power
source
to
power
the
meter.
Normal
Operating
Mode
When
switched
ON,
the
LCD
displays
‘0000’
for
a
period
of
time,
depending
on
the
time
that
the
meter
has
been
inactive.
The
meter
will
then
proceed
to
the
normal
mode
of
operation
where
the
LCD
displays
the
current
HCHO
level
in
ppm,
the
Temperature
(°C/°F),
and
RH%
(relative
humidity)
alternately
at
6
second
intervals.
Multi
‐
Color
Status
Indicator
LED
The
Front
panel
status
LED
uses
a
color
‐
coding
system
to
inform
the
user
as
to
the
measured
HCHO
concentration.
Green
for
Good;
Yellow
for
Hazard;
Red
for
Danger.
If
the
LED
fails
to
illuminate
please
return
the
unit
for
service.
Alarm
indication
When
the
Formaldehyde
limit
of
0.08ppm
is
exceeded
the
meter
audibly
beeps
and
flashes
an
alarm
icon
on
the
LCD.
Refer
to
the
CONTROL
BUTTON
section
to
learn
how
to
silence
the
beeper.
Control
Button
The
Control
button
located
on
the
left
side
of
the
meter
is
used
to
control
and
program
a
variety
of
meter
functions.
Press
and
hold
the
Control
button
to
enter
the
function
mode.
Repeated
presses
of
the
control
button
cycle
through
the
available
parameters.
These
parameters,
in
order,
are:
ZERO
Calibration
Temperature
Unit
selection
(°C/°F)
Temperature
compensation
(used
in
conjunction
with
side
potentiometer
adjust)
Humidity
compensation
(used
in
conjunction
with
side
potentiometer
adjust)
Unit
of
measure
change
(ppm
or
mg/m
3
)
Alarm
Beeper
ON/OFF
Factory
Default
setting
reset
Escape/Return
(abort
operation
and
return
to
normal
operation)
Note:
A
removable
cover
protects
the
offset
adjustment
and
prevents
unintentional
adjustment.
Remove
the
protective
cover
to
perform
an
offset
adjustment.
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