EM测试/瑞士CAISOCalibration set for automotive transientsHighlights
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
Automotive test pulse verification under loaded conditions
In accordance with the pulse verification requirements given in Annex C of ISO 7637-2:2011 and Annex A of ISO 16750-2:2012, test pulses generated by automotive transient generators need to be verified both under no-load (open circuit verification) and loaded conditions with specified loads. The values of the load resistors is specified and are equal to the generator&＃39;s internal source impedance defined for the corresponding test pulse.
The CA ISO is a resistor box containing all load resistors required to verify micropulse and load dump generators according to international standards and manufacturer requirements.
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.
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.
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