I need help with fixing a Tektronix 2245A oscilloscope (long)
"dave" wrote in message
m...
On 07/25/2014 07:16 AM, Baron wrote:
Hi Chris,
That is a capacitor and should read O/C on an ohmeter. Lift one end
and re-check. You might find it's OK. In circuit measurements are
not always reliable !
Discharged caps show increasing resistance as they charge, then show open.
If they read 0.0 Ohms they are shorted.
Only if they have a large enough value that they want to draw more charging
current from the meter than it can supply quickly. Thus, you see the
'apparent' resistance climb over a long enough period of time to see.
0.022uF will demand such a low charging current that the meter will be able
to supply it near instantaneously, so you will likely never see anything of
significance on either an analogue or a digital meter, the reading being
open circuit pretty much from the off
Arfa
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