Hi everyone. I know this was discussed to some extent in older threads but I'm having a very specific issue involving the use of the Hamilton Beverly combined with a Zahm and Nagel piercing device. In a nutshell, we are trialling the equipment and cannot get an "accurate" DO reading from cans or bottles. The PPB measurement is sticking on 0, even if we pass the contents of 3+ cans through the rig. I know this is a good piece of equipment & it is taking accurate readings during calibration.
Suspect it must be something with our technique:
>Can is pierced using Zahm and Nagel.
>Nitrogen gas pressure increased to force beer up inlet tube and into DO meter.
>Repeated with c. 3 cans
>No change in DO reading observed.
The main feeder tube to the DO meter is a significantly wider gauge than the piercing needle, could this be having an effect?
I've attached a pic of the overall process, let me know if you have any ideas, cheers!
Suspect it must be something with our technique:
>Can is pierced using Zahm and Nagel.
>Nitrogen gas pressure increased to force beer up inlet tube and into DO meter.
>Repeated with c. 3 cans
>No change in DO reading observed.
The main feeder tube to the DO meter is a significantly wider gauge than the piercing needle, could this be having an effect?
I've attached a pic of the overall process, let me know if you have any ideas, cheers!
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