User Guide
15
5. Troubleshooting
5.1 Installation
If when installing the SC-USB the Hardware installation wizard is not displayed
immediately try rebooting the PC with the SC-USB plugged in or run the Add
Hardware option in the Control Panel. If the wizard still does not appear it is
possible that drivers are already installed for the SC-USB – check using the
Device Manager.
The SC-USB uses a chipset made by FTDI. Many other USB devices also use this
chipset. As a consequence, the SC-USB and other FTDI devices may share some
common driver files. To ensure that the latest files are used, install the SC-USB
after the other devices are installed. Also be aware that re-installing an older
device last may result in unreliability, as older drivers may overwrite the newer
ones without any warning
.
5.2 Software Settings
Generally, no specific settings are required to use the SC-USB with Campbell
Scientific software. The datalogger should be entered in the device map as if it
were directly connected to the COM port assigned to the SC-USB. The baud rate
setting has no effect on the speed that the SC-USB communicates with the
datalogger. This is normally determined automatically. The 21X and CR7 and
non-Pakbus TD dataloggers do not support automatic baud rate detection. In these
cases the SC-USB needs to be set to a fixed baud rate. This can either be done
using the SC-USB utility program (see Section 4) or, if your software package
supports it; for example by using the ‘Generic modem’ option of LoggerNet, the
baud rate can be set by sending a single character code at the start of each call to
the datalogger. The codes are shown in the table below.
ASCII
character
Baud Rate
1
9600
2
38400
3
57600
4
115200
5
76800
6
115200
The SC-USB can be left in auto mode; the numeric characters will not be echoed.
If using the generic modem option of LoggerNet, you would enter a generic
modem between the COM port and the datalogger, and enter T"1" in the dial
script to force the baud rate to 9600 baud; the other hardware settings can be left at
their default values.
Setting the baud rate using the latter method is useful if you use the SC-USB to
move between a number of different types of datalogger and wish to avoid having
to reconfigure it too often.
If you experience any problems using this software, please report this to Campbell
Scientific, giving full details with any solution if available, for possible inclusion
in a future release of this User Guide.
5.3 Electronic Interference
Electronic emissions emanating from the SC-USB interface itself are very low.
However, while verifying this during the development of the SC-USB, Campbell
