CH9720 Programmable DC Electronic Load Instructions Chapter III Menu Operation
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Hint: Please refer to Appendix A for the rear panel Sense interface pin configuration.
Delayed shutdown
Automatic delay shutdown can be applied to four basic load modes: constant voltage,
constant current, constant power, and fixed resistance. If automatic delay shutdown is
turned on, the load will be timed in seconds after the load is started. After the break, the load
will automatically turn off.
Type the number key directly, press the
【
ENT
】
key to confirm, and enter 0 to turn it off.
Hint: the unit is seconds (s), the setting range is 1 ~ 99999s.
Hint: If the setting value is 0 or close to 0, the automatic shutdown display is “Off”,
which means the function is turned off.
Electric flow range
This model is fixed to a low current range and cannot be switched.
Maximum current
The maximum load current has two main functions:
1. The settable constant current value (Is=) will be limited to below this maximum
current;
2. In the case of CV,CP, CR and short-circuit test, when the load current exceeds the
maximum current, the instrument will alarm and display over-current protection (OC). If it
exceeds a large value, the load will automatically shut down.
Hint: Enter the number directly when setting the maximum current, press
【
ENT
】
to
confirm.
Voltage range
This model is fixed to a low voltage range and cannot be switched.
Maximum voltage
Setting the maximum input voltage has two main functions:
1. The settable constant voltage value (Vs=) will be limited to below this maximum
voltage;
2. When the input voltage exceeds the maximum voltage, the electronic load will alarm
and display
“Exceed Voltage!!!”
and the load will be turned off;
Hint:Enter the number directly when setting the maximum voltage,press
【
ENT
】
to
confirm.
Maximum power
Used to declare the maximum power that the load is allowed to consume. Once the actual
power consumption exceeds this value, the instrument will alarm and display power
protection (OP), which may cause the load to automatically shut down.
Hint: Enter the number directly when setting the maximum power, press
【
ENT
】
to
confirm.
