-5-
DUMP flashing
Connect the HHM to the serial port of your computer
with the appropriate cable.
Run the supplied graph program under windows and
press the CAPTURE button when it is displayed. A
field at the bottom of the screen will display
CAPTURE ON.
At this time press the green enter key on the HHM.
The HHM-AQ display will read :
DUMP
OUTPUT flashing
When all the data has been transferred to your
computer
The display will read
SELECT FUNCTION
SEND flashing
The data is retained in the HHM and can be dumped
again if desired. Stored data is only erased when the
you begin logging again.
The computer screen will display a graph of the data.
You can then print the data by pressing the PRINT
button on the screen.
The supplied graphing program is intended to
provide a very straight forward method of graphing
data. If more complex analysis of the data is
required you can press the SAVE button and copy
the data into your spread sheet application.
After checking for proper connections and
communication
1.
Run the GRAPH.EXE program
2.
Select the correct COM port
3.
Set CAPTURE to ON
4.
'DUMP' the data from the HHM.
5.
When all data is received a graph will display on
your screen
6.
The screen has buttons to PRINT the graph and
to SAVE the
data to a file.
7.
You can later load the saved file into your
spreadsheet for more
complex analysis.
The instrument has logged four fields of data. 1 is
air quality, 2 is temperature, 3 is humidity and 4 is
the analogue output. All values should be used to
establish trends. The absolute values on the scales
are arbitrary. Once a graph is displayed use the
COM Port buttons to select the data field you wish to
view.
6.
WIRING & TECHNICAL DATA
Supply Voltage
12 to 30 VDC
Supply Current
100 mA
Operating temperature
-10 to 60 C
Operating Humidity
10 to 95% rH
Outputs
4 to 20mA / 0...10 VDC
Output Impedance
> 1k ohms for voltage
1000*Vs/24 for current
Note about outputs:
Both the current and voltage
outputs are always available
They are independent but
their scales are related. If you
select 4-20mA you will also
get a 2 to 10V output. If you
select 0 to 10V out you will
also get 0 to 20mA out.
If you select 0 to 5V you will
also get 0 to 10 mA out.
