7 days ago
Blank not reading "0"
What could possibly cause my blank to not read zero?! I'm getting high and negative numbers. I got 3.113 thrn -. 20 etc... Up and down. Usually eventually I will get 0.00. Have not been able to get.
I have to get blank of positive zero 0.00 mean before running standards.
For an hour I was not able to get a positive zero
The blank is distilled water!!