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It is common for pH or EC (electrical conductivity) measuring instruments to become uncalibrated. This may be due to factors such as the accumulation of residues on the electrodes, changes in the physical properties of the electrode, and the aging of electronic components.
Regular calibration of measuring instruments is essential to maintain their accuracy and ensure reliable measurements. Calibration should be performed using known standard calibration solutions, such as the 20 ml calibration liquid for EC 1413 µS.
These solutions have known reference values and are used to adjust and correct the instruments so that they provide accurate measurements.

Adwa offers a variety of calibration liquids, storage and cleaning for your meters and electrodes. In this case, the "buffer over 20ml EC1413 µS calibrator" is specifically mentioned as an example of calibration liquid.
Sachet preparation: Place the calibration sachet in a glass to prevent spilling the contents and wasting the liquid. Then, open the sachet, either using the easy-open system or with scissors, cutting the top of the sachet about 1 cm below the top.
Manual calibration:
a. Turn on your meter and make sure that the electrode or meter is in good working condition.
b. Place the electrode inside the sachet containing the EC1413 µS calibration liquid.
c. Gently shake the sachet to ensure that the meter correctly detects the correct value.
d. Use the calibration screwdriver or the calibration dial (depending on your meter model) to adjust the data displayed on the meter screen to the value indicated on the calibrator.
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