problem with accuracy of PH IN ALL MY RECIPES

[Brews Bros]

HI GUYS , I M HAPPY WITH THIS APP BUT
REGARDING THE PH ESTIMATION , THE REALITY IS I M ALWAYS 0.4/ 0.5 POINT FAR FROM REALITY
OK I COMPENSE NOW BUT AM I YHE ONLY ONE FACING THIS
OK OK , I CHECK MY WATER IN LABORATORY BLA BLA BLA , USE DIFFERENT TYPE OF PH METER TO CONFIERM CALIBRATION BLA BLA BLA
THANKS GUYS

 

[Ozarks Mountain Brewery]

HI GUYS , I M HAPPY WITH THIS APP BUT
REGARDING THE PH ESTIMATION , THE REALITY IS I M ALWAYS 0.4/ 0.5 POINT FAR FROM REALITY
OK I COMPENSE NOW BUT AM I YHE ONLY ONE FACING THIS
OK OK , I CHECK MY WATER IN LABORATORY BLA BLA BLA , USE DIFFERENT TYPE OF PH METER TO CONFIERM CALIBRATION BLA BLA BLA
THANKS GUYS

all caps is on your keyboard, please correct

 

[Yooper]

HI GUYS , I M HAPPY WITH THIS APP BUT
REGARDING THE PH ESTIMATION , THE REALITY IS I M ALWAYS 0.4/ 0.5 POINT FAR FROM REALITY
OK I COMPENSE NOW BUT AM I YHE ONLY ONE FACING THIS
OK OK , I CHECK MY WATER IN LABORATORY BLA BLA BLA , USE DIFFERENT TYPE OF PH METER TO CONFIERM CALIBRATION BLA BLA BLA
THANKS GUYS

It's never off for me, usually if it is it's within 0.05 or so. When you check the mash pH, at what point are you checking it?

 

[Minbari]

What do you use to check ph?

 

[Brews Bros]

It's never off for me, usually if it is it's within 0.05 or so. When you check the mash pH, at what point are you checking it?

I wait 15 minutes when the first rest start

 

[Brews Bros]

What do you use to check ph?

I use different pH meter, but when I check my water I find same result as the lab.

 

[Donoroto]

The pH of the ‘raw’ water has a negligible effect on mash pH. The water has almost no buffering capacity, so the grains vastly overwhelm the water pH easily.

Have the lab measure pH on a wort sample that you also measured. And wort temperature affects the meter readings, so 20 C might be a good value.