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Old 25th September 2021, 22:32   #2
clf
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MG ZT CDTi

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Quote:
Originally Posted by MSS View Post
In another thread a member mentioned the use of a clamp meter for measuring the quiescent current with a clamp meter.

Well, here it is being done earlier today just as a check.

Note the use of a brick to simulate closed bonnet.

https://the75andztclub.co.uk/forum/a...1&d=1632607692

Measurement at time 0 - a few seconds after car being locked with everything switched off

https://the75andztclub.co.uk/forum/a...1&d=1632607830


Measurement at 2 minutes (the drain reaches this value in a number of steps as systems shut down)

https://the75andztclub.co.uk/forum/a...1&d=1632607830


Measurement at 12 minutes

https://the75andztclub.co.uk/forum/a...1&d=1632608005


Measurement at 20 minutes

https://the75andztclub.co.uk/forum/a...1&d=1632608031


The final value is about 25mA.


I would accept up to 50mA and would definitely investigate if the final value was over 75mA


A clamp meter certainly makes taking these measurements rather straightforward. However, the cheap clamp meters are of no use as they only measure AC current. An AC/DC current clamp meter is required and the one here is the cheapest decent one of which I am aware. It is available for just over £40 to £50 from various suppliers.
Have you read/heard about the Parkside one? If I recall, was about £15, only bought as a 'just in case' option in the tool bag. No idea how good or bad it is, but it seemingly does DC also. Can also be used as a normal meter too.

https://www.youtube.com/watch?v=wkMS...TechGuruAndrew
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