3270 Series Operation Manual 31
3.3.13. Key and LED
The input to the 3270 series AC/DC Electronic Load can be switched ON/OFF by
Using the “LOAD” button. Indication of the ON/OFF state is provided by illumination
Of the Button.
LOAD button lit = LOAD ON (load sinks according to the preset values)
LOAD button unlit = LOAD OFF (the load does not sink current)
Turning the LOAD OFF does not affect the preset values. When the LOAD ON state
Is enabled the unit will revert to sinking according to the preset values.
3.3.13.1. LD ON and LDOFF are set the open and close loading angle Control, the
Full range of 0-359 degree.
Please refer to table 1 for adjustment ranges.
3.3.14. Key and LED
Pressing Level Key will be B, press again will be A, further pressing will be B again
And so on. B means Level B (LED ON), e.g., to move out Level A, then move in
Level B. A means Level A (LED OFF), e.g., to move out Level B, then move in Level
A.
Under the condition of setting Memory A or B, this key is mainly for setting the
Values of groups A/B for rapid switching load current or resistance.
3.3.15. Key and LED
The voltmeter and internal trigger circuit of 3270 Series AC/DC electronic load can
Be controlled by this Key thus determining whether or not the input to the voltmeter
Is made from the AC input terminal (OFF) or Vsense terminal (ON).
Upon Vsense ON, LED indicator will be ON and the 5 digit voltmeter can display
The voltage read from Vsense. Upon Vsense OFF, the 5 digit voltmeter can
Display the voltage read from AC input terminal.
3.3.16. Key and LED
If the PRESET key is pressed the button will become lit indicating that the PRESET
mode has been accessed. The lowest 5 digit display will change from showing the
power consumption in watts to displaying the value to be preset. The value that can
be programmed changes according to the operating mode that has been selected
.
3.3.16.1. Constant Current (CC) mode:
The A and B levels of load current can be preset at right lower 5 digit
LCD. the "A" LED will be lit indicating the setting value is amps.
LOAD
LEVEL
SENSE
Preset
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