i dont measure the supply voltage, when meassure the output voltage at pin 6 the one power supply decrease from 15V this is the problem maybe i must isolated then ground of power generator and osciloscope ?

 

Which supply? V+ or V-
WHen does it decrease and how much?

deacrease the -V near zero ( short out)

 

deacrease the -V near zero ( short out)

Then your drawing is incorrect. One of your grounds is shorting the negative supply.

 

Show us a photo of the power supply.

 

I suspect that in the actual test setup that there is a poor connection. That might be caused by a high resistance clip lead, which has caused problems for others, including me, in the past.

 

Then your drawing is incorrect. One of your grounds is shorting the negative supply.

how is the correct setup of expirement ?

 

i dont measure the supply voltage, when meassure the output voltage at pin 6 the one power supply decrease from 15V this is the problem maybe i must isolated then ground of power generator and osciloscope ?

I have seen that type of issue before with some scopes. What brand scope are you using?
Using a capacitor in series with the scope probe might be all that's needed.

 

deacrease the -V near zero ( short out)

Then you are using a 15 volt supply whose Negative Terminal is internally connected to Ground. If you now try to ground the Positive terminal, you are effectively shorting the power supply.

As Oleksandr Fatiuk mentioned in his post, you need Floating power supplies where neither the + or the - is internally NOT connected to ground.

 

how is the correct setup of expirement ?

It is correct as drawn. What I am saying is that your actual wiring is different than drawing. The post above suggests one way that might be true, i.e. there is a ground connection you are not aware of.

 

I have seen that type of issue before with some scopes. What brand scope are you using?
Using a capacitor in series with the scope probe might be all that's needed.

i dont measure the supply voltage, when meassure the output voltage at pin 6 the one power supply decrease from 15V this is the problem maybe i must isolated then ground of power generator and osciloscope ?

That answer makes no sense at all!!

What is the reference for the voltage that you are telling us drops??
At all times, and under all conditions, every voltage is given in reference to some point in a circuit, and we are not told what that point is. So we must be told what the other side of the voltage measurement is.

 

i dont measure the supply voltage, when meassure the output voltage at pin 6 the one power supply decrease from 15V this is the problem

If you don't measure it, how do you know that it has changed?

 

If you don't measure it, how do you know that it has changed?

If you are doing a one-terminal measurement, which is exactly what the TS is describing, the result will be exactly as accurate as any other single point voltage measurement would be.
And if the TS is not willing or able to tell us the reference point for the claim that the one power supply voltage has decreased then there is no reason to continue this thread. Mb2

 

If you are doing a one-terminal measurement, which is exactly what the TS is describing, the result will be exactly as accurate as any other single point voltage measurement would be.
And if the TS is not willing or able to tell us the reference point for the claim that the one power supply voltage has decreased then there is no reason to continue this thread. Mb2

the supply voltage is ok... the problem is the current the current in both V+ and V- is not the same !

 

For most op-amps that use two supplies, the current is seldom the same.

 

The op-amp configured as an amplifier needs a power supply, done. There is always an exception, but not likely in this circuit.
The semiconductive media has power but pin 3 subcircuit is missing. (supply current really is not the same)
Keep in mind the wave coming in on pin 2 is set, however pin 3, the non-inverting is poorly matched,
When pin 3 internals are set to compliment the gain and setting of the non inverting operation will not be impeded.

 

One more thing to consider is that we are not given the model number of the op-amp. That matters quite a bit.
Consider how many different op-amps there are, and that they are not all the same.
And then we are repeatedly told that a voltage that is not measured is changing. Finally comes the statement that apparently the currents from the two supplies do not seem to be the same. OF COURSE THEY WILL NOT BE THE SAME!! the only source of output current on the op-amp is the current from the power supply. So the supply currents will always vary.

I suggest to study the internal circuit of the op-amp as shown with the specification data to understand this.