Product category:
ATE Systems
News Release from: Keithley Instruments | Subject: Model 2790
Edited by the Electronicstalk Editorial
Team on 21 May 2002
High throughput for airbag inflation
tester
New from Keithley Instruments, the Model 2790 SourceMeter switch airbag inflator test system provides an overall cost of test much lower than existing igniter test systems.
New from Keithley Instruments, the Model 2790 SourceMeter switch airbag inflator test system provides an overall cost of test much lower than existing igniter test systems This is accomplished by tightly integrating sourcing, measuring, and switching functions in a single instrument, by eliminating the need for synchronisation between the computer/controller and the Model 2790, and by reducing signal routing complexity
This article was originally published on Electronicstalk on 9 Dec 2003 at 8.00am (UK)
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In addition to airbag igniter tests, the Model 2790 improves test efficiency and throughput in many other applications, such as continuity and hipot testing of cables, wiring harnesses, and connectors, plus general high/low ohms measurements on a wide variety of electronic components and materials.
Moreover, the Model 2790's low energy voltage and current sources have been designed to reduce the possibility of device damage while still accurately measuring critical low and high resistance parameters.
Additional safety features include a hardware source interlock, and an automatic output cable capacitance-discharge circuit for high voltage insulation resistance testing.
The Model 2790 SourceMeter switch system is designed for a general class of airbag inflator testing referred to in the automotive industry as 'E-Check' (not to be confused with emissions testing done in many US regions).
The primary airbag inflator E-Check is verification of proper electrical characteristics in the pyrotechnic initiator, a fusible wire with a typical resistance around 2-3ohm.
A second test checks the safety shorting clip (less than 100mW) to verify that initiator pins are shorted together, a safety feature that prevents accidental activation during airbag handling and installation.
(The shorting clip is removed after installation is complete.) A third test is a high voltage isolation resistance measurement to make sure there is no electrical leakage path (ie low resistance) between the initiator and the grounded metal housing of the system's electronic module, which otherwise could cause a "no-fire" condition.
Some manufacturers perform additional electrical tests on their airbag modules and wiring harnesses using the same E-Check test stand. Request a free brochure from Keithley Instruments ...
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