Fluke 1507 Problem

[Stijn_v]

My fluke 1507 isolation tester gives a wrong measurement on Voltage. It must be 0.0 V but on the screen is  -0.1 . Must i calibrate the meter or is there something broken.

[Black Phoenix]

No need to calibrate. That's normal, residual voltage.

If you insert both probes and touch between them the value should go to zero.

[Stijn_v]

No, when you touch the leads together it staysin -0.1 voltage.

[Stijn_v]

No, when you touch the leads together it staysin -0.1 voltage.

[retiredcaps]

I used to buy used and abused Fluke meters and one of them, when probes shorted, showed -0.2 ohms  My post from 8.5 years ago.

See post #2 at

"https://www.eevblog.com/forum/repair/multimeter-repair-time-again!-fluke-177-reads-8-ohms/"

[J-R]

Voltage measurement accuracy specifications for that device are: 50 Hz to 400 Hz ± (% of Rdg + Digits): ±(2% + 3).

So best case the device shouldn't be trusted to within 0.3V anyway.

Supply some known inputs and see if they are correct?

[Stijn_v]

Must i clean the PCB? There is nothing dirt on the pcb ?

[CapLeaker]

Cleaning the board with 99% alcohol is a cheap investment. I’ d do the same thing if it would be mine. retiredcaps fixed his by cleaning the board twice. Hopefully it will fix yours too…
I’ve got a Fluke 178 when they came out over 20 years ago. So far so good, never missed a beat and is still within spec.

[J-R]

There is nothing wrong with it, why "fix" it until it's really broken??