Supco IAQ50 User manual
OPERATION MANUAL
IAQ50
Indoor Air Quality Monitor
CO2/Humidity/Temperature
Model:
7721
77231
7722
77232
SEALED UNIT PARTS CO., INC.
PO BOX 21, 2230 LANDMARK PLACE
ALLENWOOD, NJ 08720 USA
Phone: 732-223-6644 • Fax: 732-223-1617
INTRODUCTION
Features/Benefits:
• Triple displays of CO level,
2
temperature and humidity.
•
s
calibration
• PC connect
Stable NDIR sensor for CO detection
2
• Statistics of weighted average
TWA (8 hours weighted average)
STEL (15 minutes weighted average)
• Visible and audile CO warning alarm
2
• Alarm output for ventilation control
• ABC(Automatic Baseline Calibration)
and manual CO2
via RS232 interface
• Includes 12 V Power Adapter
1
Ideal for Indoor Air Quality Diagnostics.
Identify Sick Builiding Syndrome due to
High CO2Levels.
MATERIAL SUPPLIED
Meter
Adaptor
Operation manual
Plain white box
This package contains:
POWER SUPPLY
The meter is powered by an AC adaptor
(12V/1A output).
2
LCD DISPLAY
TWA Time weighted average(
STEL hort-term exposure limit
(15 minutes weighted
DP Dew point temperature
AIR Air temperature
WBT Wet bulb temperature
% Unit of relative humidity
oE (C/F) Celsius/Fahrenheit
AVG/CO/ALM/HLD/
Vain icons in these models
MAX/MIN Maximun/Minimum readings
8 hours)
S
average)
%%
OO
ALM
HLD
CO2
CO2
concentration
in ppm
Relative
humidity in %
Air temp.
Dew point
Wet bulb
temp. in
oC or F
o
Symbols
MAX MIN AVG TWA STEL PPM
CO
3
Enters setup mode.
Saves and finishes settings.
Enters CO calibration with .
2
Enters RH calibration with .
Exits setup page/mode.
Resets the meter and clear MAX/MIN.
Terminates during calibration.
Selects AIR, DP, WBT temps display.
Selects mode or increases value in
calibration and setup.
Activates MAX, MIN, STEL,TWA function.
Selects mode or decreases value in
calibration and setup.
KEYPAD
SETSET
CAL
ESC
CAL
ESC
DP/WB
M /
X
N
AVG
RESETRESET
DP/WB
M /
X
N
AVG
OPERATION
Plug in the adaptor and the meter turns
on automatically with a short beep. It
performs 30 seconds countdown(Fig.1)
for meter warm up, then enters normal
mode with current CO , temperature,
2
and humidity readings displayed (Fig.2).
Fig. 1
Fig. 2
POWER ON/OFF
%%
OO
CO2
PPM
or
4
%%
OO
CO2
%%
OO
CO2
Fig.3 Fig.4
TAKING MEASUREMENT
Press to switch temperatures
display. The lower left display will cycle
from air temperature, dew point temp.
(Fig.3), and wet bulb temp.(Fig.4).
The meter starts taking measurement
after power on and updates readings
every second. In the condition of opera
-ting environment change (ex. from high
to low temp.), it takes 30 sec to respond
for CO sensor and 30 minutes for RH.
2
NOTE: Do not hold the meter close to
faces in case that exhalation affects
CO levels.
2
AIR, DP, WBT
DP/WB
PPM PPM
Under normal mode, press to see
the minimum, maximum, and weighted
average readings. Each press of ,
it displays MIN, MAX, STEL, TWA in
sequence and returns to normal mode.
In MIN and MAX modes, it shows the
minimum and maximum readings of
CO on main display and of AIR or DP
2
or WB temperature and humidity on
the lower displays. (Fig.5)
Fig.5
M /
X
N
AVG
M /
X
N
AVG
%%
OO
CO2
PPM
MAX,MIN, STEL,TWA
In STEL and TWA modes, the main
display shows the
(STEL) and 8 hours(TWA).
weighted average of
CO readings for the past 15 minutes
2
The lower
displays are the current AIR, DP/WB
temperatures and humidity. (Fig.6)
5
%%
OO
STEL
CO2
Fig.6
PPM
NOTE:
1.
If the meter is turned on for shorter
than 15 minutes, the STEL value will
be the weighted average of readings
taken since power on. Same for TWA
values appear before 8 hours.
2.It takes at least 5 minutes to calculate
STEL and TWA. The display shows
“----” (Fig.7) during the first 5 minutes
from power on.
%%
OO
STEL
CO2
Fig.7
The meter features visible and audible
alarm to give warnings when CO
2
concentration exceeds the limit. Users
can set up 2 limits: An upper limit for
alarm threshold that requires air
conditioning and a lower limit to stop
the alarm. (See P1.0in setup for setting
alarm limits).
ALARM & OUTPUT
ALARM
6
LED alarm keeps blinking when beeps
are manually shut. It stops only when
readings fall under the lower limit.
ALARM OUTPUT
The meter is designed with a relay
to send output for further connection.
When CO readings go over the upper
2
limit and cause alarming. The relay
picks up automatically and send output.
It can be connected to a ventilation
system or activator for conditioning the
air quality. The relay will drop out when
CO readings fall under the lower limit.
2
It emits beeps(Abt.80dB) with blinking
LED when CO level goes over the upper
2
limit. Beeps can be stopped by pressing
any key or automatically stops when
CO reading falls below lower limit.
2
If the beeper is temporarily shut, it will
sound again when readings fall below
lower limit and then go over the upper
limit again, or users press for more
than 1 second to activate it.
RESETRESET
Alarm
Output
RS232
Adaptor
H /
CO / umidity Temperature IAQ50
2
DP/WB
M /
X
N
AVG
Press or to increase the value or
to decrease. Each press tunes 100
ppm and the alarm range is from 100 to
9900ppm.
7
CO2
Fig. 8
SETSET
CO2
PPM
P1.0 CO ALARM: UPPER&LOWER LIMITS
2
Fig. 9
When entering setup mode, P1.0and
“AL” (Fig.8) are displayed on the LCD.
Press again to go into P1.1for setting
CO upper limit. The current set value
2
will be blinking on LCD(Fig.9).
CAUTION:
It’s suggested to set up the alarm
value within specification range
that accuracy is ensured. The out
of spec readings are only for
reference and not suitable to use
as alarm limits.
SETUP
SETSET
CAL
ESC
CAL
ESC
Hold down under normal mode for
more than 1 sec to enter setup mode.
To exit setup, press in P1.0, P3.0, or
P4.0and it returns to normal mode.
Note:
P2.0is not applicable in these models
but for future model with CO and CO
2
measurements.
Fig. 11 Fig. 12
OO
Press in P1.0to access P3.0for set-
ting up temperature scale(Fig.11).
Press and it goes into P3.1 with
oo
blinking C or F current set(Fig.12) on
oo
the lower left display. To switch C or F,
press or . Then press to save
the setting or without saving and
return to P3.0
DP/WB
SETSET
DP/WB
M /
X
N
AVG
SETSET
CAL
ESC
CAL
ESC
P3.0TEMPERATURE SCALE
8
P4.0ABC SELECTION
Fig. 11
ABC (Automatic Baseline Calibration)
is to implement baseline calibration to
eliminate the zero drift of the infrared
sensor. The ABC function default is off
when turning on the meter. Users can
enable it by following the procedure.
Press in P3.0or in P1.0to access
P4.0for selecting ABC function.(Fig.13).
Fig. 10
SETSET
CO2
PPM
SETSET
CAL
ESC
CAL
ESC
When the preferred value is set, press
to go into P1.2(Fig. 10) for lower
limit setting. After both settings are
done, press to save or without
saving and return to P1.0.
DP/WB
M /
X
N
AVG
Fig.13
CO2
9
CO CALIBRATION
2
CAUTION:
1. Do not calibrate the meter in the
air with unknown CO level.
2
Otherwise, it will be taken as 400
ppm and leads to inaccurate
measurements.
2. When operating the meter in the
close indoor areas that are not
ventilating,
be sure
to disable the ABC function to
prevent incorrect calibration.
such as hospitals or
offices with windows shut,
The meter is calibrated at standard
400ppm CO concentration in factory.
2
It’s suggested to do either ABC or
manual calibration regularly to maintain
good accuracy.
Fig. 14 Fig. 15
CO2CO2
Press and it goes into P4.1 with
blinking “dis” default (Fig.14) on the
lower left display. To enable the ABC
function, press or and “En” blinks
for choice(Fig. 15). After the preferred
selection is done, press to save the
setting or without saving and return
to P4.0
SETSET
DP/WB
M /
X
N
AVG
SETSET
CAL
ESC
CAL
ESC
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