ITech IT-M3900C Series User Manual page 117

Transient overvoltages may occur in the electric system due
to the switching off of loads and due to short accelerator tip-
ins. These overvoltages are simulated by means of this test.
Short
Endurance
E-03 Transient undervoltages
Transient undervoltages in the electric system may occur
due to switching on of loads. These undervoltages are simu-
lated by means of this test.
E-04 Jumpstart / recuperation
Jump starting of the vehicle is simulated. The maximum test
voltage results from commercial vehicle systems and their
elevated electric system voltages.
E- Slow decrease and increase of the supply voltage (without
06A energy storage )
The slow decrease and increase of the supply voltage is si-
mulated as it occurs during the slow discharging and charg-
ing procedure of the vehicle battery.
T1 Holding
Time
E- Slow decrease and increase of the supply voltage (with en-
06B ergy storage – Part 1 )
Checks will slow the supply voltage decrease to the energy
storage protection voltage, followed by energy storage
disconnection.
T1 Holding
Time
E-07 Slow decrease, fast increase in the supply voltage
This test simulates the slow decrease of the vehicle system
voltage to the energy storage protection voltage followed by
shutdown to 0V and the sudden reconnect the system volt-
age by a charged or new energy storage battery.
T1 Holding
Time
T1 Rising
Time
E-08 Reset behavior
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Short time mode (3 times)
Endurance mode (1000 times)
Holding time
Holding time
Holding time
Rising time
Power Supply Function
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