CTD-N Technical Manual
page 14
EAR-Controlled Technology Subject to Restrictions Contained on the Cover Page.
3. Click on the CTD-N button and then click on the CTDPro Software button. This will start
the software installation.
Selecting the CTD-N
To select the CTD-N:
1
1. Choose Start
➤
All Programs
➤
RD Instruments
➤
CTDPro.
CTDPro starts and the CTDPro Main window opens.
2
2. Choose File
➤
Properties.
The Properties dialog box shown in Figure 6 opens.
3
3.
In the Properties dialog box, select CTD-N from the Product drop-down list box, and then
click OK.
The Properties dialog box closes, the CTD-N is selected, and the CTD menu appears in the
menu bar to the right of the File menu in the CTDPro Main window.
Figure 6.
The Properties Dialog Box
Communication Interfaces
The CTD-N includes three communications interfaces for configuring and downloading data from
the instrument. The instrument was prewired from the factory for RS-232, RS485 or CMOS (TTL)
digital depending on what was specified at the time of order. The serial tag on the instrument iden-
tifies which communications interface is factory installed. For instructions on how to change the
wiring for an interface other than what was factory installed, contact TRDI. See
for information on how to contact TRDI.
RS-232 Interface
The RS-232 serial interface requires that your computer provide true RS-232 data levels. Some
older laptop computers do not support the negative output voltages provided by the RS-232 stand-
ard and these computers may not work properly with the instrument.
