CH9720 Operation Manual
Chapter 2 Description
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4
3
2
1
8
5
6
7
2.3
Front panel
No.
Name
Description
1
Power
Turn on and off the load.
2
USB HOST
Connect USB disk. Support FAT16 and FAT 32.Firmware
update, data storage and load, save screen imagine(Only
available for CH9720BU/9720CU)
3
Operation
ON
：
Start up the load test.
SAVE
：
Save the data to U disk, the light is blinding when data
is recording (Only available for CH9720BU/9720CU)
4
LCD display
Display test result, condition and system information.
5
Input
Full-functional numerical keyboard, used to input data, or
character for file name.
6
Knob
Right-left adjustment for setting data and menu operation
7
Input terminal
：
red is
positive and black is
negative
Reversed polarity input will cause big
current, dangerous
8
Soft key
The function of 5 keys is changed as function page, which is
not fixed. In different menu, there is different function. The
function is displayed on the top of the key .