-3-
A
The unit will display:
TYPE OF OUTPUT
4...20MA flashing
The up/down arrow key toggles 0...10V to 4...20ma
and back. Press enter to accept your choice.
The display will now read:
TYPE OF OUTPUT
CONTINUOUS flashing
The up/down arrow toggles from CONTINUOUS
to STEPPED. Press enter when the desired value is
selected. Continuous gives an output signal that
varies continuously from zero to full scale. Stepped
gives an output signal in steps equal to the values
specified in the GOOD, FAIR, POOR and BAD
parameters. Choose continuous normally.
The display now reads:
SENSITIVITY 100 MOST
XX % flashing
Press up/down to display desired value, then press
ENTER to accept the value. This parameter fine
tunes an AQT-2000 for a particular location. Start
with 25. If the instrument responds too quickly to
changes in air quality lower the value, if too slowly
increase the value. After changing the value you
must SEND the new program to the AQT.
The unit now displays:
SET GOOD AIR OUTPUT
XX % flashing
Enter the desired value on the keypad. Press
ENTER to accept the value. Selecting 10% would
open the damper on a school portable 10% to provide
fresh air at all times even if the air quality was good.
The HHM will display:
SET FAIR AIR OUTPUT
XX % flashing
Press up/down to display desired value, then press
ENTER to accept the value. If you select 33, the
AQT-2000 output will be 33% of full scale or open a
damper 33% when the air quality is fair.
The display then reads:
SET POOR AIR OUTPUT
XX % flashing
Press up/down arrow to display desired value and
press ENTER to accept the value. Try 66 to start.
The unit now displays:
SET BAD AIR OUTPUT
XX % flashing
Press the arrow key until the display shows the
desired value and then press ENTER to accept the
value. If you select 100, the AQT output will be
100% of full scale when the air quality is bad.
Skip section B and go directly to section C.
B
The unit will display:
TYPE OF OUTPUT
4...20MA flashing
The up/down arrow key toggles from 0...10V to
0...5V to 4...20mA and back again. Press enter to
accept your choice.
The display will now read:
CHOOSE SCALE START
99999
This is the larger of the two numbers you enter to set
the analogue output scale range. It can have a
maximum value of 39999. As a starting point try
20,000 to 30,000. Press the enter key when the
desired value is selected.
The display will now read:
CHOOSE SCALE END
99999
This is the smaller of the two numbers you enter to
set the analogue output scale range. It can have a
value from zero up to near the value specified above.
As a starting point try 5,000 to 10,000 for clean
living spaces or zero for spaces that may have very
high concentrations of VOC’s Press the enter key
when the desired value is selected.
Proceed to section C.
C
The display will read :
SETUP COMPLETE
then
SELECT FUNCTION
SEND flashing
The program has now been entered in the HHM,
hand held module. It has not been entered into the
AQT-2000, air quality monitor.
If you are happy with the entered program and wish
to send it to the AQT-2000. Press the green ENTER
key while SEND is flashing.
The program in the HHM will be sent to the monitor
and the display will read
DEVICE PROGRAMMED
PRESS ANY KEY
It is possible to get an ERROR message at this point
if the data has not been properly transmitted to the
AQT-2000. If this occurs check the Telco
connection and press the ENTER key again until you
get the DEVICE PROGRAMMED message.
You can disconnect the HHM now. It will retain its
program and can be used to program other AQT-
2000 modules later.
