EXTECH INSTRUMENTS
4
FM300-en-GB_V1.9 3/17
Operation
POWER THE METER
Plug the AC adaptor into meter and receptacle to turn on the meter. Reset the date and time
each time the meter power is cycled. Remove the adaptor or switch off the AC power source to
shut down the meter.
GETTING STARTED
All LCD display lines will switch ON and the LED will glow orange when power is applied to
meter. The display will warm up to 5 or 10 minutes depending on air quality after which the
meter enters the normal mode.
In normal mode, the top display line indicates the current HCHO (CH
2
O) concentration in ppm,
the middle display line shows RH% and ambient temperature readings; the bottom LCD line
alternates between Date and Time.
If the measured HCHO (CH
2
O) concentration exceeds the user-programmable Alarm threshold
value when the meter is switched ON the LED light will flash red and the audible beeper will
sound (unless it has been disabled by the user). Press SET and MODE at the same time to silence
the alarm beeper.
When attempting to manually store the current HCHO reading, the LED light turns green for one
second and a short beeper tone will sound.
Toggle the displayed temperature units by press and holding the
o
C/
o
F/RH%
▲
button for 3
seconds.
SETTING THE DATE AND TIME
In normal operation, the meter alternates the date and time displays.
Short press SET to change AM/PM.
1.
Press and hold SET for 3 seconds to see image at right.
2.
Press
▼
to decrease a number or press
▲
to increase a number
3.
Press SEL/RECALL to scroll through the YEAR-MONTH-DAY
4.
When finished changing the Date, press SET to change the Time
5.
Press
▼
to decrease number or press
▲
to increase number
6.
Press SEL/RECALL to scroll through HR-MIN-SEC
7.
Press SET to access the alarm setting (see Alarm section).
8.
To exit, press and hold SET for 3 seconds.
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