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Products => Other Equipment & Products => Topic started by: Richard W. on January 08, 2011, 07:51:15 pm

Title: Fluke 87 V Continuity Beeper
Post by: Richard W. on January 08, 2011, 07:51:15 pm
Hello,

does anybody know the maximum resistance at wich the beeper of a Fluke 87V indicates continuity?
There is no specification in the manual.

Maybe someone could try it out with a potentiometer?

with best regards
Richard
Title: Re: Fluke 87 V Continuity Beeper
Post by: Kiriakos-GR on January 08, 2011, 09:18:42 pm
Interesting question ..

I run this test on my 28II Fluke , identical to 87V ..

And the beeper beeps happily  from 0 - 112  113 Ohms ...  then stops. 
Title: Re: Fluke 87 V Continuity Beeper
Post by: saturation on January 08, 2011, 09:23:31 pm
Great question, glad Kiriakos tested it empirically.  Its good to know.
Title: Re: Fluke 87 V Continuity Beeper
Post by: ziq8tsi on January 09, 2011, 05:07:48 am
There is no specification in the manual.

Interesting.  That information seems to have been missing for the series III too, but the original 80 series manual did give "typical" values.

The specifications for the Fluke 179 state that the beeper turns on at <25? and off at >250?.  The actual behaviour is on at <=43? and off at >=81?.

Amprobe 38XR-A manual says that the tone indicates <40?, which is exactly what you get.
Title: Re: Fluke 87 V Continuity Beeper
Post by: Time on January 09, 2011, 08:10:17 am
Those numbers are surprisingly high.  I would have guessed much lower.
Title: Re: Fluke 87 V Continuity Beeper
Post by: ModemHead on January 09, 2011, 02:28:00 pm
Here's some data points from my box o'multimeters:
87V: on at <= 53, off at >= 91
87:  on at <= 73, off at >= 199
83:  on at <= 53, off at >= 160
Title: Re: Fluke 87 V Continuity Beeper
Post by: Kiriakos-GR on January 10, 2011, 12:39:38 am
Great question, glad Kiriakos tested it empirically.  Its good to know.

I did the test with my Decade resistors box..
And so my numbers are spot on  0.1%   ;)
Title: Re: Fluke 87 V Continuity Beeper
Post by: Richard W. on January 10, 2011, 10:14:27 pm
Thanks for all the interesting results. I am also surprised about the high values.
The beep-value on my gossen metrawatt is adjustable. (1;10;20;30;40 and 90 ohms).
10 ohms is the factory-preset value. I hoped that this setting could have been the reason of the slower responsing time. But obviously it doesn't matter at all.
Title: Re: Fluke 87 V Continuity Beeper
Post by: Kiriakos-GR on January 11, 2011, 12:43:25 am
For the only "adjustable" that I would fly my hat , would be the volume of the beeper.

Quote
slower responsing

Only Dave are good at playing music with the leads and the beeper ,
but he had practice allot ..  ;D
Title: Re: Fluke 87 V Continuity Beeper
Post by: williefleete on January 11, 2011, 01:44:21 am
i made a continuity beeper using a few triple 5's not sure what resistance it will still beep at but less than 1k probably