trouble analog esr meter calibration

[Savetheday]

Hi
I bought a second hand analog esr meter. It doesn't have any instruction manual and I couldn't found it in internet. But I guess I need to do some calibrations.
When I put two red test leads together moving pointer should go all the way right.But it doesn't.It goes up to middle.I have tried to adjust with potentiometer at the back and front even display reading underneath. I couldn't made it up to all the way right.
Do you have any suggestions?
Thanks.

[Vtile]

I have no idea, but I must ask the obvious.. That Varta Super is a fresh battery is it.

[Savetheday]

Yes with multimeter I have read both 1.5Vs??Do I need to do something else?

[Vtile]

I have more questions. What it does read while the probes aren't connected and how it do respond to the zeroing pot while leads are open?  Some meters do have Infinity "zeroing".

.. Like I said, I have no idea, sorry. 

One thing might be that the meter movement is off.. So turning that black chisel screw really carefully do a mechanical zeroing for the meter..

[Vtile]

Yes with multimeter I have read both 1.5Vs??Do I need to do something else?

Did you use any kind of load while measuring that 1.5V??? as it should be more like a 1.63V for a fresh alkaline measured with a modern high impedance (resistive) DMMs (with 1 to 10 MegaOhm input impedances).

[kripton2035]

seems very close to the top right "capacitor esr tester" on my web page here :
http://kripton2035.free.fr/analog%20esr/esr-multimeter.html

The zero of the meter tends to drift with changes in the battery voltage. Several builders have emailed me with modifications to use a low dropout regulator to keep the voltage more constant

so it could be a battery related problem.

[Savetheday]

Yes indeed, it was a battery problem. It works good with 3.3Vs powersupply.
Thanks.

[Vtile]

Good.   Happy measuring.

[kripton2035]

these batteries seems to be CR2 models ? so they must be 3v rated, and so you need some 6v nominal to make this esr meter to work normaly ?
http://www.parts-express.com/varta-cr2-lithium-photo-battery--140-012

[Savetheday]

these batteries seems to be CR2 models ? so they must be 3v rated, and so you need some 6v nominal to make this esr meter to work normaly ?

http://www.parts-express.com/varta-cr2-lithium-photo-battery--140-012

No, those are 1.5V not the lithium one. I measured with load 1.42V 1.44V.

seems very close to the top right "capacitor esr tester" on my web page here :
http://kripton2035.free.fr/analog%20esr/esr-multimeter.html

The zero of the meter tends to drift with changes in the battery voltage. Several builders have emailed me with modifications to use a low dropout regulator to keep the voltage more constant

so it could be a battery related problem.

I think this meter is different, it has 2 ICs and I'm not able to read IC codes .