IAQ 8494
IAQ 8494
•
Dual displays of CO
2
and temperature
•
Stable NDIR sensor for CO
2
detection
•
Statistics of weighted averages
•
BS8494 compliant (from -10º to 60 ºC)
•
Backlight for working in dark areas
•
Audible CO
2
warning alarm
•
Easy manual fresh air correction on CO
2
•
PC Software (
Optional
)
Operation
Press button 1 to turn the meter
on and off.
After a 30 second warm-up the
meter is ready to use and will
display the normal operating
screen (Fig. 2).
Pressing button 4 will cycle
through current air temperature.
Pressing button 6 will cycle through minimum CO
2
,
maximum CO
2
, Time Weighted Average (TWA -
weighted average of CO
2
in the past 8 hours) and
Short Time Exposure Limit (STEL -weighted
average of CO
2
in the past 15 minutes) readings
since power on.
Pressing button 5 will hold all current readings
except TWA and STEL.
Pressing and holding button 2 for more than a
second will turn the backlight on and off.
The unit will turn off automatically after 20 minutes
of inactivity. To override this function, turn the unit
off then restart it by holding buttons 1 and 5
together.
The meter will take a new reading every second.
When the operating conditions change, the unit
will respond in 30 seconds for CO
2
.
When battery supply is low, 'Lob' will be
displayed.
Change the batteries or connect to the DC
adaptor.
NOTE:
Do not hold the meter close to the
face as exhalation can affect CO
2
readings.
