Staff Answer
Jun 03, 2026 - 11:27 AM
You probably do not need a 20:1 attenuator specifically, but depending on the test you will at least want a 10:1 attenuator.
The 4425A can read up to 200V with protection up to 250V. If you are testing primary igntion or direct fuel injectors with a operating voltage higher than 12V, you should use an attenuator until you know the voltage will stay under 200V.
The 4425A can read up to 200V with protection up to 250V. If you are testing primary igntion or direct fuel injectors with a operating voltage higher than 12V, you should use an attenuator until you know the voltage will stay under 200V.
Source: SA
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