#
5.
Using the SSP with DeTransfer
This section briefly describes the use of each of the sensors and actuators on the SSP. The sample
programs can be run from DeTransfer. The DeTransfer programs can either be typed into the send
window, copied and pasted from this document, loaded directly from the CD ROM or copied from the
CD ROM to the DeTransfer sub-directory C:\Program Files\Datataker\Detransfer.
To open a command file in DeTransfer, Click on File and select Open from the drop down menu. In
the file selection dialog box select the path to where your files have been saved and open the
appropriate command file.
5.1
Potentiometer 1 (Labelled 1V, 1+V, 1+L)
This potentiometer is connected to analog input channel 1, and produces the following signals on the
terminals (ranges are approximate)
•
1V
a variable voltage in the range of 0 to 1800 mV
•
1I
a variable current in the range 0 to 18 mA
•
1+I
a variable current in the range 4 to 20 mA
•
1+L
a variable current loop in the range 0 to 100 %
These inputs can be read by the following DeTransfer program. (Prog1.dxc)
BEGIN”Pot_1”
P47=5
RA1S
1V
1I
1+I
1+L
END
5.2
Potentiometer 2 (Labelled 3R)
This potentiometer is connected to analog input channel 3 as a 4 wire resistance input, and produces
a variable resistance in the range approximately 0 to 500 Ohm.
The potentiometer resistance can be read by the following DeTransfer program. (Prog2.dxc)
BEGIN”Pot_2”
RA1S
3R(4W)
END
5.3
Potentiomener 3 (Labelled 4PT385)
This potentiometer is connected to analog input channel 4 as a 4 wire RTD input, and produces a
variable temperature in the range approximately -20 to 200 deg C.
The RTD resistance and corresponding ‘temperature’ can be read by the following program.
(Prog3.dxc)
BEGIN”Pot_3”
RA1S
4R(4W)
4PT385(4W)
END
Page
10
