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Calibrating pH meter

I am calibrating a pH meter. Can I use distilled water that I already prepared at normal room temperature? and its pH is 7 or is variable?

o.u.hyd
researcher - Hyderabad, A.P., India
2004

No, you need at least two buffered standard solutions to calibrate a pH meter.

Ted Mooney, P.E.
Striving to live Aloha
finishing.com - Pine Beach, New Jersey
2004

2007

How do I calibrate my ph pen? I have 2 solutions with the pen, but instructions are mad. My solutions are, ph4.003, and ph 6.864, they are my buffers. This is for checking ph in a tropical fish tank.

Thanks in advance

Jim

James Langan
- Glasgow, Scotland, UK

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