HP 3435A Digital multimeter quick fix - diyAudio
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Old 17th February 2015, 06:12 PM   #1
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Join Date: Dec 2008
Location: Victoria, BC
Default HP 3435A Digital multimeter quick fix

I recently bought a DOA HP3435A multimeter.

Those meters all seem to come with a battery backup 'Option' with a hefty NiCad battery pack and charger module in the lid. This meter was strictly for bench AC power use, and I have no interest in rebuilding the NiCad pack (which had been done once already, from what I could see).

There's a jumper location for non-battery use; using it brought back the meter from dead with blown fuses to working properly. I just left the charger/battery cable unplugged.

The service manual is available online, but I found the jumper from the clear printing on the PCB.
Good HP manuals link:
Index of /~kurt/manuals/manuals/HP Agilent

Re-flowing the solder on the switch connections seemed to clear up a small problem with volts/ohms LED 'confusion'.

It's nice working with good gear I could never afford when it was new.
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Old 17th February 2015, 09:48 PM   #2
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The battery pack option can often be used for ultra low noise measurements. If you don't need that, then just get it out of there so they don't leak everywhere.
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Old 17th February 2015, 10:55 PM   #3
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Quote:
Originally Posted by PedroDaGr8 View Post
If you don't need that, then just get it out of there so they don't leak everywhere.
I've done that, now. Thanks for the tip.
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