Voltage

[boscoe99]

Since it is so easy to obtain a voltage calculator on the innerweb, what's the point in buying a peak voltage adapter or peak voltage reading meter? Alternatively, data indicates that RMS (typical voltmeter) voltage can be converted to peak voltage by multiplying voltmeter reading by 1.414.

Am I misunderstanding anything?

fairdeal, are you interested in taking some peak voltage measurements to verify that the calculators are correct?

[walleye1]

[walleye1]

Don't you need a peek voltage adapter so you don't tear up your meter?

[walleye1]

Ok, i reread the post again. I understand.

[fairdeal]

interesting question

of course V peak = 1.4 x V rms only for a sine wave,
the relationship is different for another waveform
(perfect square wave, peak and rms are the same, yes?)

so perhaps the thinking is, the wave being measured may be neither perfect sine, nor square
but something else?

I'm away from home for a few weeks - so unable to experiment....

[oldmako69]

This will explain it....

https://www.youtube.com/watch?v=Ac7G7xOG2Ag

[boscoe99]

interesting question

of course V peak = 1.4 x V rms only for a sine wave,
the relationship is different for another waveform
(perfect square wave, peak and rms are the same, yes?)

so perhaps the thinking is, the wave being measured may be neither perfect sine, nor square
but something else?

I'm away from home for a few weeks - so unable to experiment....

Sorry, I should have stated for a sine wave.

I was originally thinking that frequency might enter into the equation but from what I can find on the innerweb that does not seem so.

I donated my peak voltage adapter to some Costa Rican Yamaha mechanics a few years ago. Can't see buying a new one just to 'spearment with.

[99yam40]

From what I thought I understood, since the manual gives specs in minimum peak reading it makes it a lot easier to get your readings with the same type of equipment

adapter is only made up of a cap, diode and resister
the proper cap is the hardest to find locally , but I am sure you can find them online

[rodbolt17]

I own 2 CD-77's, the third I donated to a tech in Rio Chico VE.
I also own the sierra equivalent of the merc analog with peak reading.
I also have 2 DVA's and 3 digital meters.
The peak of the charge coil started as an AC sine wave,however once rectified and stored it is a very rapid peak of either + or negative spike.
most digital meters buffer to slow to catch it.
peak reading will.
that is why I use the Hz function to check injector signals.

[boscoe99]

I own 2 CD-77's, the third I donated to a tech in Rio Chico VE.
I also own the sierra equivalent of the merc analog with peak reading.
I also have 2 DVA's and 3 digital meters.
The peak of the charge coil started as an AC sine wave,however once rectified and stored it is a very rapid peak of either + or negative spike.
most digital meters buffer to slow to catch it.
peak reading will.
that is why I use the Hz function to check injector signals.

I can see using the Hz function to check the injector signals. Hard to measure a ground being applied in milliseconds.