How to read peak DVA meter

[j1r11]

While testing my stator ohm resistance my manual say to look for 0.3 OHMS when set at X1 OHMS. The manual that comes with my meter is worthless. My question is how do i read .3 on a analog meter? Also, why are there 2 sets of numbers for volts? I was taking my volt DVA reading with the line that has the black arrow pointer, is this correct?

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[Tig]

Re: How to read peak DVA meter

how do i read .3 on a analog meter? Also, why are there 2 sets of numbers for volts? I was taking my volt DVA reading with the line that has the black arrow pointer, is this correct?

.3 Ohms on that meter is going to be all the way to the right. Right up against the 0 Your meter is not ideal for measuring such a small resistance, but it should be fine for what you are doing. On your meter the Ohms selections are multipliers of the scale. So the number on the scale is multiplied by what ever you have set the selector to. (x1, x10 etc.)

Your voltage scales work differently. In that case you are selecting the value that represents full deflection of the needle. (all the way to the right). Your voltage selector has many choices, but they only begin with either 2 or 4. There are two voltage scales. One is calibrated for 20, full scale deflection the other is calibrated to 40, full scale deflection.
For example if you set the selector to 40 you read directly from the 40 scale. (10V 20V 30V 40V) Now if you set the selector to 400 you still use the 40 scale but now 40 is 400V (full scale deflection) 10 is 100V, 20 is 200V. The same translation occurs if using the 20 scale. Set you meter to 2V and full scale deflection of 20 is 2V. 10 will be 1V and 5 is a half volt.
I hope that makes sense the way I explained it.

 

[roncoop75]

Re: How to read peak DVA meter

Unless you find one of those coils completely open, the resistance readings don't mean much.

You have 2 separate voltage readings because one is for the high speed stator wires and the other is the low speed stator wires.

 

[j1r11]

Re: How to read peak DVA meter

.3 Ohms on that meter is going to be all the way to the right. Right up against the 0 Your meter is not ideal for measuring such a small resistance, but it should be fine for what you are doing. On your meter the Ohms selections are multipliers of the scale. So the number on the scale is multiplied by what ever you have set the selector to. (x1, x10 etc.)

Your voltage scales work differently. In that case you are selecting the value that represents full deflection of the needle. (all the way to the right). Your voltage selector has many choices, but they only begin with either 2 or 4. There are two voltage scales. One is calibrated for 20, full scale deflection the other is calibrated to 40, full scale deflection.
For example if you set the selector to 40 you read directly from the 40 scale. (10V 20V 30V 40V) Now if you set the selector to 400 you still use the 40 scale but now 40 is 400V (full scale deflection) 10 is 100V, 20 is 200V. The same translation occurs if using the 20 scale. Set you meter to 2V and full scale deflection of 20 is 2V. 10 will be 1V and 5 is a half volt.
I hope that makes sense the way I explained it.

That helps, thanks for taking the time to dumb it down for me. So, when using 2, 20 or 200 setting i should read the lower volt bar(5,10,15,20) and using 40 or 400 use the upper one, correct? If i have it set at 2V then the #20 is 2V, set on 20V the #20 is 20V and set on 200V the #20 is 200V, correct? Also, what is the black arrow pointer for just to the left of 20? Reading OHMS i will just use my digital for the .3 reading.

 

[j1r11]

Re: How to read peak DVA meter

Unless you find one of those coils completely open, the resistance readings don't mean much.

You have 2 separate voltage readings because one is for the high speed stator wires and the other is the low speed stator wires.

Ahh, did not know that, thanks.

 

[Tig]

Re: How to read peak DVA meter

That helps, thanks for taking the time to dumb it down for me. So, when using 2, 20 or 200 setting i should read the lower volt bar(5,10,15,20) and using 40 or 400 use the upper one, correct? If i have it set at 2V then the #20 is 2V, set on 20V the #20 is 20V and set on 200V the #20 is 200V, correct? Also, what is the black arrow pointer for just to the left of 20? Reading OHMS i will just use my digital for the .3 reading.

You're welcome.
You understand correctly on how to use the selector and scales.
I'm drawing a blank on the black arrow. It looks like a mid-scale mark, but I don't recall how/why you would care.

 

[Drfishyman]

Thank you for posting this, I was having the same issue reading this meter. The directions that it came with are utterly useless! Especially the DVA section.

 

[H20Rat]

Re: How to read peak DVA meter



You're welcome.
You understand correctly on how to use the selector and scales.
I'm drawing a blank on the black arrow. It looks like a mid-scale mark, but I don't recall how/why you would care.

Calibration mark, its perfect dead center of the needle range.

 

[bruceb58]

Hey SC....you just answered a question from 4 years ago!

That's what happens when an old thread gets opened up! Happens to me all the time.

 

[Cueball876]

I have the same meter.... And completely agree... The manual is junk.... Might as well be in Spanish....I was testing the resistance on my stator, and it pins the needle all the way over to right, past 0 ohms.... Any help?