Power Supply Function
Start-up Characteristics
Detect DUT characteristics before and after vehicle startup.
After turning on [On/Off] and triggering the waveform output, the instrument will
apply the startup characteristic parameters as shown in the figure and table be-
low to related input terminals of the DUT simultaneously.
• t: Time time (in ms) t1: 5ms
• U: Voltage (in V) t2: 15ms
• U
s
: 18V t3: 50ms
• U
A
: 21V t4: 10000ms
• U
T
: 42V t5: 100ms
4.6.3.4 SAEJ1113-11 Waveform Protocol
SAEJ1113-11 Waveform protocol related parameters are described as follows:
SAEJ1113-11
SAEJ1113-11 Waveform protocol
Test–2B Transient from DC motors acting as genera-
tors after ignition switch OFF
12V
Select the 12V voltage system
Td Test pulse width
24V
Select the 24V voltage system
Td Test pulse width
Test–4 Starter motor engagement disturbance
pulse
12V
Select the 12V voltage system
Vs For details, see Table
4–1 Parameter
Description
Va
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