QIWEI PHS-3CWB pH meter (desktop microcomputer)

PHS-3CWB

pH meter (desktop microcomputer rechargeable)

Introduction

Qiwei PHS-3CWB PH Meter (Desktop Microcomputer) with charging function, manual temperature compensation, measurement accuracy of 0.01/0.1pH, with data storage and extraction functions. The pH meter adopts imported high-quality integrated components, which makes the measurement of the pH meter more stable and reliable.The PHS-3CWB PH meter is calibrated with three standard buffer solutions at pH of 4, 6.86 and 9.18.

How to use the product

usePHS-3CWB PH timer, calibration required. The pH meter needs to be plugged in to preheat before use, then calibrated, and finally measured.

1. Prepare before use

1) Plug the power adapter into the 220V AC power supply and the DC output plug into the power jack on the rear panel of the PH meter.

2) The electrode is installed on the electrode stand, remove the short-circuit plug on the electrode socket of the PH meter, and plug in the electrode. (Note that the electrode plug should be kept clean and dry before use, and should not be contaminated)

3) Turn on the power first, press the on/off button, and preheat for about 5 minutes.

2. Calibration

PHS-3CWB A PH METER IS REQUIRED FOR CALIBRATION4.00, 6.86, 9.18 three standard buffer solutions.

Before using the PH meter, it should be professionally calibrated.PHS-3CWB The pH meter should be calibrated with three standard buffer solutions: 4.00, 6.86 and 9.18, and the standard buffer solutions used should be accurate and reliable to ensure the accuracy of the subsequent measurement results.

1) Plug in the power supply and press the "Switch" button to power on. UnscrewPHS-3CWB The short-circuit protective cover on the socket of the PH meter is connected to the molded case pH composite electrode, and the electrode is washed and spun dry in purified water. Measure the temperature of the pH buffer solution with a thermometer and press the increase button "∧" or decrease the button "∨" to adjust the temperature value accurately.

2) Positioning calibration. Immerse the pH electrode in pH 6.86 buffer, stir it slightly, and hold the "Calibration" button until the measured value is stable. When the LCD screen displays the CAL symbol, release the "Calibration" button, first display the flashing 6.86, display the End symbol after a few seconds, and then display the pH calibration value (the pH value displayed at this time varies with different temperatures, for example, 6.86 at 25°C, 7.04 at 15°C, these are the values set in the chip, the same below). Indicates that the calibration is completed and memorized.

3) Slope calibration I/calibration II is performed sequentially. Calibration I uses pH 4.00 buffer and Calibration II uses pH 9.18 buffer. OPERATION METHOD: TAKE OUT THE PH ELECTRODE, WASH IT WITH PURE WATER AND SPIN IT DRY, THEN IMMERSE THE PH ELECTRODE IN PH4.00 (pH9.18) BUFFER, STIR IT A LITTLE AND THEN STAND STILL, AFTER THE MEASURED VALUE IS STABLE, PRESS AND HOLD THE "CALIBRATION" BUTTON, RELEASE IT WHEN THE LCD SCREEN DISPLAYS THE CAL SYMBOL, FIRST DISPLAY THE FLASHING 4.00 (9.18), DISPLAY THE END SYMBOL AFTER A FEW SECONDS, AND THEN DISPLAY THE PH CALIBRATION VALUE, INDICATING THAT THE CALIBRATION IS COMPLETED AND MEMORIZED. Once the calibration is complete, the percentage slope of the electrode in that linear segment is automatically displayed.

Calibration Instructions: Built-in intelligent chip, you can use one-point, two-point or three-point automatic calibration, if the measurement accuracy is ≤0.1pH, as long as you use pH buffer solution for a little calibration; If the measuring range is only in the acidic range (≤7pH), pH7 and pH4 calibration are optional; If the measuring range is only in the alkaline range (≥7pH), pH7 and pH10 calibration are optional; If the measurement range is relatively wide, or the pH electrode is used for a long time and there is aging phenomenon, a three-point calibration should be selected, which will make the measurement accuracy higher, and the first time the pH electrode is used, a three-point calibration is required to adjust the slope of the instrument to be consistent with the pH electrode.

3. Measure the pH value of the solution

Measure the temperature of the solution with a thermometer, then press the increase button ∧or decrease the button∨ adjust the temperature value of the instrument accurately, wash the pH electrode with pure water and spin it dry, immerse it in the measured solution, and place it still after a little agitation, and the reading when the measured value is stable, that is, the measured pH value.

Note: The closer the temperature of the test solution is to the temperature of the calibration solution, the more accurate its measurement will be.

4. Measure the mV value

Press the "pH/mV" button to switch to the "mV" setting.PHS-3CWB PH MeterConnect the ORP electrode or ion electrode (need to be equipped) and insert it into the measured solution, stir it slightly, and place it statically, and read it after the measured value is stable, which is the measured ORP value or the potential value of the ion electrode.

Actual picture of the product

Packing list：Host x1, Buffer reagent x3, Encasement box x1

[Note]Because the manufacturer's packaging may be updated or upgraded, the detailed packaging list shall be subject to the latest standard configuration of the manufacturer.