How to Calibrate 1. Use the calibration powder preparing a standard buffer solution. 2. Immerse the electrode in the standard buffer solution under the temperature of 25°C and wait for one minute. 3. Regulate the trimmer with a screwdriver until the reading corresponding to stand buffer solution pH4.01 or 6.86. Specifications: Measuring Range: 0.0-14.0pH Resolution: 0.1pH Accuracy: ±0.1 pH(20°C) Use Environment: RH 95%, 0-50°C(32~122℉) Adjustment: Trimmer Potentiometer - One Point Calibration Battery: 3*1.5V(AG-13 button cell) Product Size: 5.90*1.13*0.56 inches Weight: 1.75 OZ Package Contents: 1 * PH Tester 1 * Carry case 1 * Calibration screwdriver 2 * pH buffer powder(for calibration) 1 * User manual Matters Needing Attention In the following cases, the instrument must be recalibrated: 1. After calibration, use or place for a long time. 2. The electrodes are used frequently. 3. Particularly high measuring accuracy. Note: If the display value is fuzzy or not showed, should replace the battery in time. Replace the battery, remove the battery cover can be replaced, note the polarity of the battery, after replace the battery need to be calibrated again. Warning Tips: Be careful with the glass probe since it may be a little fragile when you use. Remember to gently wipe it with a clean, soft cloth when you're done before capping it again.
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