pH Analyser Calibration Record Template

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• How to Use sheet with steps
• Template sheet, blank and ready
• Example sheet, filled in
• 26 built in formulas
• A4 landscape print setup
• Works in Excel, Google Sheets and LibreOffice

Preview of the Filled Example

This is the Example sheet from the download, so you can see exactly how the completed ph analyser calibration record looks.

Buffer verification after calibration

About the pH Analyser Calibration Record

pH electrodes age and coat, which reduces their slope and shifts their offset. Recording both at every calibration shows electrode health over time and when to replace it.

How to fill in this template

1. Clean and rinse the electrode.
2. Place it in buffer 1 (pH 7), wait for stability and record mV; repeat with buffer 2.
3. The sheet calculates slope %, offset and electrode condition.
4. Calibrate the analyser, then verify in buffers and record readings.
5. Replace the electrode if slope or offset is outside limits after cleaning.

What the formulas do

• Slope = (mV₂ − mV₁) ÷ (pH₁ − pH₂).
• Theoretical slope = 0.198416 × (T + 273.15) mV/pH.
• Offset at pH 7 = mV₁ + (pH₁ − 7) × slope.

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