User Manual

4. PH Calibrating Procedure
4.1. Calibrating Consideration
This pH meter was calibrated by a mV signal, which was simulated from the
ideal mV query of the pH electrode (on the basis of an environment of 25°C).
Has to be considered:
a) An ideal electrode produces 0 mV at a value of pH = 7.0, however,
most electrodes differ slightly.
b) The temperature of the measurement environment is not always about
25°C, but mostly between 15°C and 35°C.
Under certain circumstances it is necessary to carry out the following
calibration procedure to adjust the electrode of the instrument to the
maximum accuracy.
Important:
The instrument’s pH range must be re-calibrated whenever:
 The electrode has been used (laid) for long time from the last calibration
 The electrode has been used in particularly taxing conditions.
 The utmost accuracy is required.
 After replacing the new electrode
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