Electronics > Beginners
Fluke 87V shows -OL when in ohms range - normal or not?
exe:
--- Quote from: Electro Detective on July 22, 2019, 09:36:01 am ---i.e. it's looking a bit suss, don't buy it :--
--- End quote ---
on the other hand, it's an opportunity to ask for a discount and have fun with repairing it :)
Electro Detective:
--- Quote from: exe on July 22, 2019, 09:42:21 am ---
--- Quote from: Electro Detective on July 22, 2019, 09:36:01 am ---i.e. it's looking a bit suss, don't buy it :--
--- End quote ---
on the other hand, it's an opportunity to ask for a discount and have fun with repairing it :)
--- End quote ---
I'm with you there :-+ but may be pushing the luck getting fixit docs from Fluke for an issue like this
Then again, a simple CAL might sort it out :-//
vinyl:
My 28II show OL, but sometimes the minus sign appears and disappears immediately.
Brumby:
--- Quote from: exe on July 22, 2019, 09:42:21 am ---
--- Quote from: Electro Detective on July 22, 2019, 09:36:01 am ---i.e. it's looking a bit suss, don't buy it :--
--- End quote ---
on the other hand, it's an opportunity to ask for a discount and have fun with repairing it :)
--- End quote ---
... If, in fact, it needs repair.
I keep wondering if it is just a slight bias that the ADC registers as negative. With an input around zero, it would only take a poofteenth of nothing (in the wrong direction) to be classified as "negative".
This is just a thought - and I cannot discount the possibility that this is indicative of a real problem - but I'd be tempted to get my hands on it and do some side-by-side comparison measurements with a known good meter. I suspect it could function within specification (assuming no other faults).
vinyl:
My 28II ohm auto range (60 mega ohm) momentarily shows a minus sign and disappears soon. Manual range 60Mega is the same.
manual range (6 mega ohm --- 600 ohms), OL is always displayed.
Navigation
[0] Message Index
[*] Previous page
Go to full version