Topic | Internal current source causes stray readings.

Home Forums Mooshimeter Support Internal current source causes stray readings.

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    • #2424 Reply
      Peter
      Guest

      I’ve found that there seems to be a roughly -0.8nA current source on the Ω and V input on the 1.2V DC range, causing stray readings whilst the meter is otherwise disconnected. A set of screenshots with the Mooshimeter sitting in a metal pan can be found at https://drive.google.com/folderview?id=0B-FoX5xGwRvKejBvT1I5T19wZTQ&usp=drive_web
      Is this expected behaviour?

      The issue shows up on both Android and iOS with firmware 1418004830.

    • #2458 Reply
      admin
      Keymaster

      Hi Peter –

      That’s within tolerance. The Ω input is floating, as is the V input when in 1.2V range, but there are protection and amplifier circuits attached to those inputs that have a little bit of leakage.

      Is this acceptable for your application?

      ~James

      PS. Pan-frying the Mooshimeter makes it ineligible for return ;)

    • #2460 Reply
      Anonymous
      Guest

      That explanation makes sense. It shouldn’t present a problem for me.

      The frying pan was solely to provide a groundplane – I found that waving my hands (or the leads) around the Mooshimeter caused spikes in the readings.

    • #2464 Reply
      Anonymous
      Guest

      The frying pan was solely to provide a groundplane – I found that waving my hands (or the leads) around the Mooshimeter caused spikes in the readings.

      Theremooshin!

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