NO, not phase
It's an 180 polarity switch on an AC output voltage , you can flip the polarity
So out of phase would start on the negative cycle not the positive cycle , that would be in phase AC...
All this means is that the sine wave output of your test fixture
starts the output on the
negative going portion of the sine wave. After the initial 1/2 wave, the signal is indistiguishable from any normal sine (or other shape) AC signal. Your DVM (DMM, whatever) recifies the incoming AC (thus eliminating the negative going portion) and is designed such that the RMS value is what is then displayed.
Now if your sinewave was, for instance, slow enough, (say, 1 to 10hz) your meter
(analog or digital and IF set to DC) would display a polarity . Try it. But once you select AC as your input for the meter, it will
never display a polarity.
And, as ChrisP58 points out,
phase issues
only relate to
two (or more) AC signals and their relationship to each other as to their starting (or instantaneous) measurement points.
Do not confuse what an o-scope displays and what a DMM is capable of displaying.
...At my work , they do check the resistance of the junctions of diodes to test if the junctions are not leaky or has leakage
The diode checker my manager said, doesn't tell the diodes leakage or if the junction has conductance or a partial short
An Analog meter will show these things right?
First, understand that an
analog or
digital meters, essentially, give you
indentical values when testing electrical characteristics of a circuit or component (albeit with differing accuracy).
With regard to leakage or partial short anamolies of a diode (one in the same), without a more sophisticated test bed than a simple resistance test, thay cannot be detected with a VOM. Often, though, some devices have a transistor/diode checker feature that can display the more subtle characteristics of a simple solid state device.