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  1. #27
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    Quote Originally Posted by rjk_cmh View Post
    Just tried a new key and worked like a charm, bumped it to 100mhz. thanks!
    There is not better place for the working men than the union! 100% UA the only HVAC union!

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  3. #28
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    Scope

    Rigol - had no idea scam vaporware. The Chinese always have some kind of time bomb take back in anything they build.

    One thing to get in your field is the unit or card test specs they use to test the card or unit if they do have a production line with auto testers. Some companies keep tight control of it. In it you have wire list, theory of operation, test specs on how they test it, block diagram. They have this for military stuff anyway. Some might be nice and email you a pdf file of it or not.

  4. #29
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    Quote Originally Posted by dhg View Post
    Hard to justify more than $700 for HVAC scope use. Buy something expensive somebody could steal it. One of those things I would not leave on a service truck. The Rigol 4 channel for $400 great price.
    An "HVAC scope" if there is such thing, would have preferable floating/isolated channels like Fluke 190's series, the Rigol cant be use on anything other than a + to ground reference that alone makes it useless for 60% of HVAC work.
    There is not better place for the working men than the union! 100% UA the only HVAC union!

  5. #30
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    Quote Originally Posted by valdelocc View Post
    An "HVAC scope" if there is such thing, would have preferable floating/isolated channels like Fluke 190's series, the Rigol cant be use on anything other than a + to ground reference that alone makes it useless for 60% of HVAC work.
    Most differential communication signals can be tested by other means than a scope. I would start with the signal then determine the best instrument. Rs-232, RS-422 not really an analog waveform. All in one Instruments like the Fluke is an option. Scopes are good as a waveform analyzer. HVAC scope ? Thats a dynamic term which will change as the signals change over time. Whatever you choose will be your HVAC scope.

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