This morning my faithful old HP 3456A 6.5d DMM failed when I switched it on
Yesterday I logged about 12hrs of data and then switched it off. This morning I find that it displays random numbers?
This is what I have found so far:
DCv no logical response - random numbers around 0.5xxx
ACv no logical response - random numbers around 0.05xxx
2W Ohms no logical response - random negative numbers even when open circuit
However,
4W Ohms accurate response on all ranges - interestingPressing the 'Test' button flashes -4.00000
Just flagging this for comment while I delve further. At the moment the DMM is under a lot of other test gear.
enut11