Ph calibration log 2025

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For wide-range pH testing, a 3-point calibration at pH 4, 7, and 10 is an option. A 2-point calibration at pH 4 and pH 10 may impact your accuracy. For Full-Range pH Testing Consider a 5-point calibration at pH 1.68, 4.01, 7.00, 10.01 and 12.46.
0:35 2:17 And take a measurement of one of the standards. Keep an eye on the pH as it settles. It should cozyMoreAnd take a measurement of one of the standards. Keep an eye on the pH as it settles. It should cozy up to the expected. Value brilliant if it doesnt youll need to recalibrate.
Clean the pH electrode with deionized water, and gently wipe it dry with Kimwipe. Place the pH electrode in the pH7 calibration solution. Press yes and wait until the reading shows that pH = 7 and ready. Press yes to confirm the calibration at pH7.
The calibration slope is the linear correlation between the mV readings of the buffers and their pH values. It is normally expressed in % and is calculated by dividing the measured slope of the calibration by the theoretical slope (Nernst slope), which is equal to 59.16 mV per pH unit at 25 C.
In order to check the calibration, remove the cap from your pH probe, rinse the probe with distilled water, and dip the probe into a small container of fresh 7.0 buffer solution. Record the pH reading on this form.

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Press and hold the CAL/RECALL button for approximately 2 seconds. CAL will appear and the display will flash. 4. The meter will automatically recognize and calibrate to the calibration standard.
To calibrate the electrode, it is first immersed in a standard solution, and the reading on a pH meter is adjusted to be equal to the standard buffers value. The reading from a second standard buffer solution is then adjusted using the slope control to be equal to the pH for that solution.

ph meter calibration certificate pdf