Yieryi Digital large screen PH Meter 0-14 Pocket Pen Aquarium Test Medidor De Ph pen

Features:

• Measuring range :0.00-14 .00 PH
• Accuracy: +/- 0.01PH
• Resolution: 0.01PH
• Operating temperature: 0 oC~ 50 oC
• Battery: 3X1.5V (AG13 button battery type) ( including batteries)
• Dimensions: 142mm (L) × 29mm (W) × 15mm (H)
• Weight: 51 g
• PH meter calibration while increasing standards:
• 1, the pH electrode into the pH value of 6.86 (25 oCc under standard mixed phosphate buffer solution, and gently shake.
• 2, with a small screwdriver adjust the calibration potentiometer until the display value and the standard buffer solution at ambient temperature ph values.
• 3, the electrodes into pH4.00 stupid phosphorus or potassium acid borax pH9.18 standard buffer solution.
• 4, after about two minutes or so. Shows the pH value of the buffer value is compared to the error should be within the allowable range.

packing list:

• 1 x ATC pH meter with plastic box
• 1 x screw driver
• 3 x AG 13 button cell batteries ( included)
• 2 pouches of calibration buffer solution (4.0 & 6.86)
• 1 x instruction manual ( English)