EXTECH INSTRUMENTS
4
FM200-en-GB_V1.8 3/17
Operation
External Probe and Status LED indicators
Attach the External Probe to the connector at the top of the meter. The status indicators on the
Probe will flash red when the Sampling Fan is on, solid red when the Sampling Fan is off, and
green when the Probe is connected to the meter and functioning normally. The user can connect
the supplied tubing to the External Probe’s INLET/OUTLET ports. A Tripod Mount is located on
the back of the External Probe (in addition to the one at the bottom of the meter).
Powering on the meter
Short press the button to power on the meter. Alternatively, use the AC/DC adaptor to power
the meter. When powered on, the meter LCD shows “0000” for a period of time (depending on
the period of time the meter has been inactive). The meter then counts from “
9999”
down to
“
0000
”.
Once the meter reaches “
0000
”, the HCHO level will be shown along with the
Temperature/Humidity readings (Temperature and RH% displays alternate every 3 seconds).
Note:
For short term measurements, battery power can be used. For datalogging or long term
usage, use the AC/DC adaptor to conserve battery energy.
Auto Power Off & Disable
The meter will automatically turn off after 15 minutes of inactivity. To disable the auto power off
function: with meter OFF, press and hold the
HOLD
button first, followed by the
button. The
LCD will show “
n
”, and will then return to normal measurement mode.
Turning the Sampling Fan ON/OFF
Press the SET button to toggle the air sampling fan ON and OFF. When the fan is ON its motion
will generate an audible sound and a vibration.
MAX-MIN Memory
Short press the MAX/MIN button to scroll through Maximum value, Minimum value, and then
back to the normal operating mode. Press and hold the
HOLD
button to clear the maximum or
minimum memory values (depending on which mode is displaying) and then return to the
normal operating mode as just described. The meter will then begin recording new maximum
and minimum readings.
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