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Advanced Function

5.3 Short-Circuit Analog Function

The instrument can analog a short circuit at input terminal. Under panel

operation, press the [Shift]+[Esc](Short) key to switch short circuit status. The

short circuit status does not influence existing setting value. When press [Shift]

+[Esc] again, the load returns back to original setting status. Actual current

value consumed by load at short circuit depends on the existing working mode

of load and current range. Under CC, CP and CR modes, maximum short-circuit

current is 110% of current range. Under CV mode, short circuit current is

equivalent to that constant voltage value of load is 0 V.

5.4 VON Function

Set voltage value (Level) to control on/off status of electronic load. Based on

Von value load and unload, the load has two modes: Living and Latch. When

Living is selected, it indicates that the work load point is in living status; when

Latch is selected, it indicates that the work load point is in latch load status.

When testing some power products with slow voltage rise speed, if the

electronic load input is opened before power on, the power may latch

protection. In this way, the user may set VON value. The electronic load only

latches when power voltage is higher than this value.

• Please confirm whether it is necessary to set loading voltage, a step that

provides convenience for limiting working voltage value. If not

necessary, do not set the loading voltage to prevent unnecessary trouble

from failure of loading.

• If the instrument can not load, please firstly check whether the VON

function is set. If yes, reset the Von value to minimum value (which may

be directly set as 0. If minimum voltage value of instrument is not 0,

press 0 for confirmation and the menu will automatically set the value as

minimum value).

• When VON LIVING function is started, the load starts load test only when

the power voltage rises and is higher than Von Point loading voltage. When

the power voltage drops and is lower than Von Point unloading voltage, the

load will unload.

ITech IT-M3300 Series User Manual

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