CH9720 Programmable DC Electronic Load Instructions Chapter II Overview
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2.3 Front panel introduction
Order
Name
Description
1
Switch
Turn on and off the load.
2
USB HOST interface
Connect USB disk. Support FAT16 and FAT 32.Firmware
update, data storage and load, save screen imagine(Only
available for CH9720BU/9720CU)
3
Operating function key
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 Screen
Display test result, condition and system information.
5
Input key
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
Function softkey
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 .
2.4 Rear Panel Introduction
1
3
5
6
4
2
4
3
2
1
8
5
6
7