ITech IT6600C Series User Manual page 76

1. Click Vehicle on the Menu screen to enter the vehicle test screen.
1) Press the up/down key to move the cursor to the Standards function
2) Press the up/down key to move the cursor to the Mode function setting
3) Press the up/down key to move the cursor to the Voltage Range
4) Press the up/down key to move the cursor to the Profile Type function
2. Press [Run] in the Vehicle function interface.
3. Press [On/Off] on the front panel, turn on the output.
4. According
[Shift]+[5](Trigger) to trigger the output of the waveform.
Load Dump Dynamic Behavior
This test is a simulation of load dump transient occurring in the event of a
discharged battery being disconnected while the alternator is generating
charging current with other loads remaining on the alternator circuit at this
moment.

The amplitude of load dump is determined by the rotational speed of
alternator and the strength of magnetic field in the case of disconnection of
the battery.

The pulse duration of load dump is mainly determined by the time constant
and pulse amplitude of the excitation circuit.
Inside most novel alternator, the amplitude of load dump is decreased by
increasing the limiter diode (clamping diode). The load dump may be caused by
cable corrosion, poor cable contact or disconnecting the battery intentionly when
the engine is running.
The pulse shape and parameters for an alternator without centralized load dump
suppression (Test A) are given in follow.
setting and press the [Enter] key to confirm. Rotate the knob to select
ISO16750-2 and press the [Enter] key to confirm.
and press the [Enter] key to confirm. Rotate the knob to select
Starting-Profile and press the [Enter] key to confirm.
function setting and press the [Enter] key to confirm. Press the numeric
keys to set the voltage as V=12V and press [Enter] to confirm.
setting and press the [Enter] key to confirm. Rotate the knob to select
level Ⅲ and press the [Enter] key to confirm.
to the selected
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trigger method, for
Power Supply Function
example, press
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