1.PH pH Meter Calibration Powder Description:
pH Meter Caliberator: pH standard solids Open the package and add water to use. Suitable for calibrating all types of pH meters. The two specifications are pH = 4.00; 6.86, which is effective for 5 years.
The PHpH standard solution for powder preparation comes in two specifications: 4.01 and 6.86, and each pack contains 250ml standard fluids. (Be sure to add water at the desired percentage. Otherwise, it will affect the accuracy of calibration, which will cause a greater error.)
Note: (The PH pen is calibrated before delivery, so buyers do not need to re-calibrate after receiving the item! In the following situations, the PH meter must be recalled and used (or placed) for a long time. Time after calibration; electrodes are used especially often; requirements for measurement accuracy are relatively high. )
2.How to use:
Cut out the plastic bag, pour the powder into the 250 ml female flask, rinse the inner wall of the plastic bag with a small amount of CO2 free distilled water, dilute to the mark, and shake well. Powder shelf life is 2 years. Can be reused as long as the formula is not contaminated. Shelf life is about 6 months after adding water. After mixing the calibration powder into the calibration solution, follow the following steps:
How to use the calibration solution:
Clean the pH meter electrode with pure water (2-3 times)
1. Soak the pH electrode in a mixed phosphate standard buffer with pH value of 6.86 (25°C), then gently shake.
2. Use a small screwdriver to adjust the calibration potentiometer until the displayed value matches the pH value of the standard buffer at ambient temperature.
3. Rinse the electrode with pure water first, then insert the electrode into the standard buffer of pH 4.00 potassium hydrogen hydrogen hydrogen hydrogen to calibrate.
4.After about 2 minutes The displayed value must be within the tolerance range compared to the pH value of the buffer fluid.
The so-called two-point calibration means using two types of calibration solutions, and the 3-point calibration is the use of 3 calibration solutions. General
6.86 starts calibration. Then use 4.00.
3.Operation Instructions:
1. Remove the protective cover.
2. First, clean the electrode of the pH meter with distilled water. Then wipe the electrode with a filter paper to dry.
3. Turn the switch on the battery compartment.
4. Insert the pH meter into the liquid testing until the liquid is submerged in the "dip line" If conditions permit, you can dip the solution slightly higher than the "dip line" level.
Line" position
5. Gently stir the solution and wait for about 2 minutes. Read the indicated value
6. The use is ended. Cleans electrodes. Turn the switch off. Wear a protective case.
4. Standard configuration
1 PH Pen, 3 Pack Powder
PREVENTION:
Please note that the PH Pen Probe is a glass product, it is fragile. Avoid collision If damaged it cannot be replaced.
To protect the probe well, use absorbent paper to gently absorb the water of the probe after use.