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Turn on the pH meter.<br/><br/>2. Dissolve each buffer solution in 250 ml of distilled water.<br/><br/>3. Immerse the electrode into the pH 6.86 solution (under the temperature of 25\u2103).<br/><br/>4. Press the \u201cCAL\u201d(calibration) button for 5 seconds and release\uff1b<br/><br/>- Display screen will start flashing \u201c6.86\u201d\uff1b<br/><br/>- Wait for it until the display screen stops flashing\uff1b<br/><br/>- Rinse the electrode with distilled water and make it dry with filter paper.<br/><br/>5. Repeat the above steps with 4.01 pH buffer powder and 9.18 pH buffer powder.<br/><br/><b>Note:</b><br/><br/>Calibration is required in the following conditions.<br/><br/>- Lengthy periods of inactivity<br/><br/>- Very frequent use<br/><br/>- The testing accuracy requirement is very high<br/><br/>- The \u201ccal\u201d key was pushed and the electrode was exposed to air for an extended period of time<br/><br/><b>Package Includes:</b><br/><br/>1\u00d7pH Meter<br/><br/>3\u00d7pH Buffer Powder<br/><br/>1\u00d7User's Manual</p>", "variants": [{"vid": "1587793539088928768", "pid": "1587793539038597120", "variantName": null, "variantNameEn": null, "variantImage": "https://cf.cjdropshipping.com/c3b20130-02b8-4a74-84ae-979fbaf68610.jpg", "variantSku": "CJHS1603480-Yellow", "variantUnit": null, "variantProperty": null, "variantKey": "Yellow", "variantLength": 155, "variantWidth": 31, "variantHeight": 18, "variantVolume": 86490, "variantWeight": 100.0, "variantSellPrice": 12.98, "createTime": 1667394454000, "variantStandard": "long=155,width=31,height=18", "variantSugSellPrice": 64.0}], "addMarkStatus": 1, "createrTime": "2022-11-02T13:07:34+08:00", "productVideo": null, "status": "3", "suggestSellPrice": "64.00", "listedNum": 177, "supplierName": "\u8303\u6960", "supplierId": "1384349674504110081"}