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Thread: Testo 550?

  1. 07-06-2012, 11:42 PM #1
    shawnml9
    shawnml9 is offline Professional Member
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    Mar 2005
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    Testo 550?

    Was using 550's today reading SH/SC just fine all of sudden lose SH thought it may be batteries replaced them then lost SC/and SH.. all the arrows are doing now are making screen blink...Anyone else come across this?
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  2. 07-10-2012, 11:15 AM #2
    HVAC-Doz's Avatar
    HVAC-Doz
    HVAC-Doz is offline Professional Member
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    Feb 2011
    Location
    Florida
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    Hello

    You may want to go to the Testo site for support to see if you need to download firmware or to reset it

    http://www.testo.com/online/abaxx-?$...oryid=49804543
    http://controltrends.org/
    http://www.stromquist.com/
    Since 1951 Stromquist & Company
    HVAC controls and industrial instrumentation
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