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Fluke 1663 MFT Advice

Former Community Member
Former Community Member
Hello

My fluke, intermittently gives a meassage ' batter lo 'indication when running low resistance continuity test (and doesn't then run the test) with a long lead and  when not zeroed ie continuity reading over a couple of ohms. The test current can toggle between 250mA or I think it's 20mA. It's fine at the lower current. The batteries are not flat. It's not the long lead as it's been tried with a new one and it does the same, Other leads have been changed, swapped etc and I'm sure it's the meter itself. Can't get any sense out of fluke technical.  It's done it from new. 2 years old and calibrated every year.  Anyone know why it might do this?  What are the quality of test result implications if I have  to use the lower current setting for doing the higher resistance readings

Driving me nuts and any help gratefully received

Thanks

Pat
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  • 0
    Actually, real battery condition monitors - often built into fire panels, UPS and the like,  measure the voltage step as a known load is keyed on and off, rather than just the absolute  battery voltage. 

    It rapidly becomes quite an involved subject, as you do not want to fail a battery in good condition, just because it happens to have been run down and is charging, or is cold, nor pass a failing battery that has a high voltage because of the temperature and the charging history. And for lead acid and Lithiums, that 'quick flick with the ammeter' that works so well on traditional primary cells is not at all the right idea - a short circuit  car battery in good shape can deliver a kA for long enough to boil the acid and split the case (as well as buggering up your meter...)

    Lithium cells commonly have battery protection current limits inside and larger ones also have  fusing inside, and you do not want to operate that by mistake. (though some on Ebay really are just bare cells, caveat emptor when handling those.)

    Mike
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  • 0
    Actually, real battery condition monitors - often built into fire panels, UPS and the like,  measure the voltage step as a known load is keyed on and off, rather than just the absolute  battery voltage. 

    It rapidly becomes quite an involved subject, as you do not want to fail a battery in good condition, just because it happens to have been run down and is charging, or is cold, nor pass a failing battery that has a high voltage because of the temperature and the charging history. And for lead acid and Lithiums, that 'quick flick with the ammeter' that works so well on traditional primary cells is not at all the right idea - a short circuit  car battery in good shape can deliver a kA for long enough to boil the acid and split the case (as well as buggering up your meter...)

    Lithium cells commonly have battery protection current limits inside and larger ones also have  fusing inside, and you do not want to operate that by mistake. (though some on Ebay really are just bare cells, caveat emptor when handling those.)

    Mike
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