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Products => Test Equipment => Topic started by: wjsmarine4342 on August 11, 2021, 05:00:04 am

Title: BM235 won't switch off - steady 1mA drain
Post by: wjsmarine4342 on August 11, 2021, 05:00:04 am

Hi All,

I have two subject meters both working well but lengthy periods of non use too.  #2 meter was difficult to start (hit and miss) but a fresh set of cells fixed it.

8 weeks later same problem and cells were flat (.9v) whereas #1 still going strong.  I tested #2 with an external 3v supply and measured 5mA running dropping to 1mA with switch off compared to 2mA and 0mA for #1.

Both instruments don't leave the workshop and are treated with respect.  Any ideas what to check next?

Cheers,
Bill

Title: Re: BM235 won't switch off - steady 1mA drain
Post by: Fungus on August 11, 2021, 03:09:58 pm

Off should be off.

Take it apart and look for foreign bodies in the selector switch.