Author Topic: Fluke 867B issue  (Read 682 times)

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Offline CramboneTopic starter

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Fluke 867B issue
« on: May 08, 2020, 05:28:25 pm »
Well I did the unmentionable and hit 2000V with my meter and heard a pop and then no readings on any function. The unit powers on and the screen displays the modes I’m on eg. VAc, VDc, Capacitor, Diode..... but won’t take a reading. I opened up and found R99 popped off the board! 😬
I checked the resistor and it tested good on another meter but tossed in trash and installed a new one. Didn’t see any evidence of anything visually but once powered on with new resistor still the same.
Any suggestions were to start looking. The big issue is I don’t have a diode or capacitor tester now!
 

Offline Wytnucls

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Re: Fluke 867B issue
« Reply #1 on: May 08, 2020, 07:45:50 pm »
I would check the protection circuit:
RT1 1.1K
RV1 RV2 RV3
R20 100K
 

Offline CramboneTopic starter

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Re: Fluke 867B issue
« Reply #2 on: May 08, 2020, 11:03:13 pm »
Well when my NEW meter comes in  :palm:I will check them. Thank you for your help!
 

Offline shakalnokturn

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Re: Fluke 867B issue
« Reply #3 on: May 08, 2020, 11:12:29 pm »
I've just received a 867B with battery corrosion and haven't been able to check it as working yet however I'd be really unlucky if it had been blasted with an over-voltage on top of that.

If you've had no luck with the input protection and want a clue on the RIC2 pin 21 input:
On mine with switch in off position and using diode test on another DMM reads 0.96V with common to 867B's input common and positive to S1-6, reversing polarity reads 1.47V.
 


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