Anton IAQ 8494 User manual

IAQ 8494 IAQ 8494
•Dual displays of CO2and temperature
•Stable NDIR sensor for CO2detection
•Statistics of weighted averages
•BS8494 compliant (from -10º to 60 ºC)
•Backlight for working in dark areas
•Audible CO2warning alarm
•Easy manual fresh air correction on CO2
•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 CO2,
maximum CO2, Time Weighted Average (TWA -
weighted average of CO2 in the past 8 hours) and
Short Time Exposure Limit (STEL -weighted
average of CO2 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 CO2.
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 CO2 readings.
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Setup
To enter the setup mode (Fig. 3) press and hold button 1
for more than a second.
From here use buttons 2 (UP) and 4 (DOWN) to cycle
through the menu screens and button 6 to access the
selected menu screen (Fig. 4).
Buttons 2 and 4 can then be used to alter the alarm
threshold on menu P 1.1 and the temperature scale on
menu P 3.1 (Fig. 4).
Use button 6 to save the current setting and return to the
main menu screen (Fig. 3).
Press button 3 at any time to exit the setup menu.
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Fresh Air Correction & Calibration
CO2 Fresh Air Correction
It is strongly suggested that the unit be corrected in a
sunny, outdoor environment that is well ventilated. Do
not correct the unit in places crowded with people or
close to areas with high CO2 concentration such as
ventilating outlets or fireplaces.
To correct the unit for CO2, place the meter in the
calibration site and press and hold buttons 2 and 3
simultaneously. The unit will flash continually for about
5 minutes, then return to normal operation.
To abort correction at any time, simply turn the meter
off.
CAUTION: The meter is corrected at ambient air of
around 400ppm. Do not correct the meter in an
environment with an unknown CO2 concentration.
Doing this could lead to inaccurate measurements.
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Specification
•CO2
Range of 0 -9999ppm
(maximum alarm threshold 9900ppm)
Resolution of 2ppm
Accuracy ± 75ppm ±5%
•Temperature
Range of -10 º to 60 ºC (14 -140 ºF)
Resolution of 0.1 ºC (0.1 ºF)
Accuracy ± 0.6 ºC
•Warm Up
30 seconds
•Operating Ranges
From 0~50ºC, 0 ~ 95% RH (avoid
condensation)
•Storage
From -20 º ~ 60 ºC, 0 ~ 99% RH (avoid
condensation)
•Power
4 pcs AA batteries, DC Adaptor
•Battery Life
10 hours (Alkaline)
•Warranty Period
3 years (anticipated sensor life 15 years)
Troubleshooting
•Fails to power up
Press button 1 for more than 0.3 seconds
and try again. Check whether batteries are
in good contact and correct polarity is
observed.
•Fixed readings
Check whether data hold function was
activated.
•Slow response
Check whether the air flow channels on the
rear are blocked.
•Error messages
E01: CO2 sensor damaged
E02:The value is under range
E03:The value is over range
E04:The original data error results in this
error
E07: Voltage to measure CO2. Replace
batteries or use an adaptor
E17: Retry CO2 calibration
E31:!Temperature!sensor!damaged!
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Anton Industrial Services Ltd
Unit 6, Greenhill House
26 Greenhill Crescent
Watford Business Park,
Watford WD18 8JA
Tel. No: 0870 428 0075
Fax No: 0870 428 0076
Email: [e-mail]
Website: www.anton-group.com