Hi
I got one of these a couple of weeks ago
The specs are here :
www.eevblog.com/forum/testgear/i-don't-need-no-stinking-calibration/?action=dlattach;attach=51658The tear down is to come (basically I will document it as I open it up to service it).
In the mean time, I would like some advice please.....
It does not seem to working properly. While I can dial in any voltage to the nearest 1mV
It should be able to dial in any voltage in the 0.1mV (100uV) range but it does not work properly.
It can set 0.1mV when the total voltage is below 4V, as soon as it goes above that the output is 0.2 to 0.3mV low.
Now I suspect the contacts on the rotary dials are dirty.
Anyone got any tips/hints on how I go about cleaning them?
(I read somewhere on the forum that someone cleaned similar Datel device by soaking the while switch assembly - not sure I can do that with this one)
Does anyone think it is not the switch contacts and may be something electronic in nature, eg op-amp output drive ?
Thanks in advance