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15 minutes by pressing any front-panel button (in effect,
resetting the clock to zero) or by disabling the APO function
and powering the HHAQ-108 through the optional AC adaptor
(see page 11 to learn how to do this).
The value of being able to quickly determine where the
level of formaldehyde is highest and lowest in an area or
facility should be obvious.
The sequence of five screen shots below illustrates the
order in which the two session values and three
cumulative formaldehyde exposure metrics are displayed
by pressing the MAX/MIN button.
To clear the MAX and MIN session values without powering
off the meter, press and hold the HOLD button for at least
2 seconds. This will flash the text CLr on the lower readout,
switch the meter to real-time measurement mode, and reset
the Max and Min memories to the values being measured at
that moment.
SPECIFICATIONS
Formaldehyde Range / Resolution: 0 to 5 ppm / 0.01 ppm
Formaldehyde Accuracy: ±(5% + 0.03 ppm)*
Formaldehyde Sensor Type/Warmup Time: Electrochemical /
1 to 15 minutes, typical
Temperature Range: 0° to 122°F (0° to 50°C)
Temperature Accuracy/Resolution: ±1.8°F (1°C) / 0.1°
RH Range: 10 to 90%RH
14
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