CH9720 Programmable DC Electronic Load Instructions Appendix B
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USB-CDC
After USB-CDC is selected, the procedure is as below
：
First connection, the PC identifies the new hardware, and select “No, not now”
Click“Next”
，
Select“From a list, or specify the location to install”
：
Then click“Next”
，
select the routine of BEICH Vcom and usbser.sys driver then
click“Next”the installation is finished
；
Then you can check the USB CDC device and terminal No.
：
Note
：
the driver of USB-CDC can be downloaded from www.beich.com.cn
When the installation is succeed, you can use RS232 to visit and control the tester, no
need to install every time,but the computer may dynamically allocate serial passwords,
please go to the Device Manager to see!
USB-TMC
If you want to use USB-TMC
，
please download and install NI-VISA from
http://www.ni.com/china
，
which the USB TMC driver is included.
When connecting to PC by USB cable, the PC identifies the new hardware, and dialog
box is jumped:Select“No, not now”
，
and click next, if NI-VISA is installed, then “USB Test and
Measurement Device” can be searched and displayed:Select“Install the software
automatically”
，
and click next, then “USB Test and Measurement Device”driver is installed.
You can check the device in the device manager
：