Fluke 1653b Tester Faulty?

[Ross1]

Hi guys,

Lately, when testing Ze and Zdb on PME and TNS my tester has been reading 0.00 and PSCC is alwats 10kA
Has anybody else experienced this.

It was calibrated in june. Ive had it for 6 years.

When testing Zs on any circuit (which is the same setting as Ze it is giving me a reading.

Any help would be appreciated

 

[tomspark93]

Hi mate I have the same tester and when I first bought it I had the exact same issue!

I sent it off to fluke and they returned it stating that it was fine and nothing wrong with it however it's work fine ever since.

Unfortunately I never found out what was wrong with it.

 

[Lucien Nunes]

This might sound daft but is it possible that you have nulled the leads with bad contact at the probes or nulled one set of leads and are now using another, so that the stored offset is too high? The 1653 saves the null and uses it on continuity and loop impedance tests until you change it. Then when you take a reading it will subtract too much and possibly hit zero every time on low Zs and low continuity readings.

I don't know what it does if measurement minus null is less than zero - one would hope it would show a negative figure to indicate an invalid null but I know at least one old model of tester that didn't, so it still gave a sensible-looking zero with the probes held together leading you to assume that the null is correct,