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  1. #1

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    Zeroing a tachometer

    Hello all,

    forgive me if this question has been asked and answered before but I've searched and cannot find an answer.

    Before use, should you be able to zero a GloBee Tachometer. My logic says not, but I have been informed it should read zero before use.

    Thank you in advance for any assistance.


  2. #2
    P-40 DRIVER's Avatar
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    RE: Zeroing a tachometer

    stick it up to a light bulb, should read 3600 rpm if its functioning correctly.

  3. #3

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    RE: Zeroing a tachometer

    Point it at a light bulb. It should read 3600 in the two-blade mode and 2400 in the three-blade mode.

    Dr.1
    There\'\'\'\'\'\'\'\'s a Hun in the sun!

  4. #4

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    RE: Zeroing a tachometer

    Thanks for the reply P-40. It seem to be working fine, and reduces accordingly when I change the number of blades. My tacho always seems to have about 3000 showing on the display when not in use. I put this down to 'background noise' but someone informed me that it should read zero when not in use. I didn't think it should but they seem to think so. I'm just a little concerned that the unit may not be working properly if indeed it should be reading zero when not in use.

  5. #5
    gkamysz's Avatar
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    RE: Zeroing a tachometer

    3600 RPM on a tach = 60 Hz Mains.
    3000 RPM = 50 Hz Mains.

    The US uses 110V 60Hz for common household appliances. Other parts of the world sometimes use other voltages and frequencies.
    Greg


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