> ISO 16750-2
> ISO 7637-1:1990
> ISO 7637-2:1990
> ISO 7637-2:2004
> ISO 7637-2:2011
> One single load resistor box
> Includes all required load resistor values
> Highly accurate resistors (+/-1%)
> High temperature stability
> Resistors with very low inductance
> Resistor values 0.5ohm, 1ohm, 2ohm, 4ohm,
10ohm, 20ohm and 50ohm
The CA ISO verification box is directly plugged into the
CDN outputs of the transient generator. The required load
resistor is selected by the bridge connector. The waveform
across the load resistor is best measured by a 100:1
voltage probe with sufficient bandwidth and voltage
capability. EM TEST recommend a bandwidth of 20MHz
minimum and a voltage measuring capability of 1,000V
SELECTION OF LOAD RESISTORS
The set of load resistors has been well selected in order to
meet the wide range of source resistors specified in
various national/international standards and vehicle
manufacturer specifications.
The following load resistors are most used:
0.5 Ohm for Load Dump pulse verification as per a number
of manufacturer specifications
1.0 Ohm for Load Dump pulse verification as per a number
of manufacturer specifications
2.0 Ohm for verification of pulse 2a and pulse 5 as per ISO
7637-2 and various manufacturer specifications
4.0 Ohm for verification of pulses 1, 2 and Load Dump
pulse 5 as per various manufacturer specifications
10.0 Ohm for verification of pulses 1 and 2 as per ISO
7637-2 and various manufacturer specifications
20.0 Ohm for verification of pulse 1 as per ISO 7637-2 and
various manufacturer specifications.
All load resistors are non-inductive and have a tolerance
better than 1% as per standard requirements. They show
sufficient power dissipation for the transient pulse energy.