Vinmetrica SC-100A Sulfite (SO2) Analyzer question

[Segarram]

I'm hoping someone out there has a Vinmetrica SC-100A sulfite analyzer and can help me with my reading. So I followed the instructions step by step.

25 ml wine sample into my flask/beaker
02 ml Acid solution
02 ml Reactor solution
Put on magnetic stir plate and begin stirring.
Turn on SC-100a instrument and place electrode in flask.
steadily add one or two drops of titration solution.

After adding about 2ml of titration solution the instrument never beeps or reaches an endpoint. the reading reaching 4.1 and stays at this reading.

Does anyone know what this means? Is there too much sulfites in my wine? Help!!!

 

[Runningwolf]

Do not pay any attention to the number readout. 2 ml is only 40ppm. You may be way higher than that.

 

[Segarram]

Thanks for the reply. However, even if I added more titration drops the 4.1 read out never changed and the instrument never beeped indicating I've reached my endpoint. Shouldn't the instrument have eventually beeped as I continued to add titration drops?