One point calibration

by Alex
(Wisconsin)

Sometimes a one point calibration is only needed. Typically, a one-point calibration is made by placing the electrode in pH = 7.00 buffer and adjusting the meter to read 7.00, ZERO (offset). The Slope is kept at 100% or at the previously calibrated value. This method gives a reasonable accuracy.

One-point calibration is also known as Offset-only calibration.

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Oct 05, 2012
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Assumption
by: Liz

It's definitely an assumption. How valid it is I guess depend on the "quality" of the electrode.

Sep 22, 2012
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When is One Point Calibration adequate?
by: Victor

When using a pH meter that only supports one point calibration, it would seem that the manufacturer has assumed that the slope for their original and replacement probes will remain constant over time and range of applications. How valid is this assumption?

May 27, 2010
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Close to the measured pH value
by: Vic

One point calibration only allows calibration at one chosen point, which should be near the pH range of your application.

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