I would think that most of us can tell the difference between wheat at 14 or 20%....
Marconi meters have a self test circuit - I usually use this as a datum and cross check the other meter.
And finally.... the old hand coffee grinder I use to prepare the sample is actually pretty accurate without the meter! If it crackles through, you should be combining. If you have to push it in with a screwdriver, go back into the house!
Marconi meters have a self test circuit - I usually use this as a datum and cross check the other meter.
And finally.... the old hand coffee grinder I use to prepare the sample is actually pretty accurate without the meter! If it crackles through, you should be combining. If you have to push it in with a screwdriver, go back into the house!