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Thread: PM3 setup/calibration question

  1. #1
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    PM3 setup/calibration question

    I purchased a DO probe and PM , the instruction manual refers to a calibration plug you need to use to setup the calibration and zero the unit, nothing like it was included with the package. Is this old documentation or do I need to purchase something else to get the unit installed?
    Thanks

  2. #2
    Master Control Freak RussM's Avatar
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    Sending you a message....
    Please do not send me PMs with technical questions or requesting assistance - use the forums for Apex help. PM me ONLY if the matter is of a private or personal nature. Thanks.

  3. #3
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    Thanks got it and replied

  4. #4
    New User
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    I’m having setup issues as well. Always reads zero. Attempted to calibrate but it times out and never gets into an “acceptable range.” Any ideas on what to do?

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