Warm Tips
PH meter has been calibrated before delivery, the buyer does not need to re-calibrate after receiving the goods!
In the following cases, the PH meter must be re-calibrated:
- Has been used for a long time after calibration;
- Special electrode use Frequently;
- The measurement accuracy requirements are relatively high.
How to Calibrate
STEP 1: Turn open pH meter, Clean the electrode in distill water
STEP 2: Immerse the electrode in pH 6.86 standard buffer solution
STEP 3: Press the "CAL" button. Wait until the display digital is 6.86pH and steady
STEP 4: Clean the electrode in distill water and dry it, immerse the electrode in Ph 4.00 standard buffer solution
STEP 5: Press the "CAL" button. Wait until the display digital is 4.00pH. Then complete pH 4.00 calibration
STEP 6: Clean electrode and dry it, put the meter into PH 9.18 standard buffer solution. Check if reading is correct between 9.17-9.19pH