PH Meter PH Meter PH-2011 Pen PH Value ATC Test Pen PH Tester Tester Pen

Specifications:

Range :0.00-14 .00 PH

Resolution: 0.01PH

Accuracy: +/- 0.1PH

Battery: 4 × 1.5V (AG-13) (not including batteries)

Temperature Compensation: 0 ^oC -50^oC

Operating temperature: 0 ^oC -50 ^oC

Size: 151mm × 33mm × 20mm

Weight: 53 g

Procedure:

1 Remove the protective cover

2， the first electrode with distilled water and dry with filter paper attached to the electrodes of the water

3， turn on the switch located in the battery compartment

4， the PH meter electrode into the test solution， until the liquid dipped slightly below the "immersion line" at

5， gently stir until the numerical stability， read the display

6， after use， clean the electrode， turn off the switch， put on protective sleeve.

PH meter calibration:

1， the PH value PH electrode immersed in 6.86 (the temperature at 25 ^oC) standard mixed phosphate buffer solution， gently shake the electrode.

2， with a small screwdriver to adjust the potentiometer until the display value and the standard buffer solution at ambient temperature PH value match.

3， the PH electrode immersed in PH4.01 phosphorus or potassium hydrogen phthalate standard PH9.18 borax buffer solution， gently shake the electrode.

4， shows the value and the buffer solution PH value should be compared to the range of allowable error.

Precautions:

In the following cases， PH meter must be recalibrated. After calibration has been used (or place) for a long time， particularly frequent use of the electrode， the measurement accuracy is relatively high.

Battery Installation:

If the display backlight brightness values decreased or blurred， replace the battery. When replacing the battery， replace the battery compartment can be pulled out， pay attention to the battery polarity.