Liquid PH 0-14 Value Detection Regulator Sensor Module Monitoring Control Board Meter Tester + BNC PH Electrode Probe Controller
Description:
Heating voltage: 5+-0.2V (AC - DC)
Working current: 5-10mA
The detection concentration range: PH0-14
The detection range of temperature: 0-80 centigrade
The response time: ¡Â 5S
Stability time: ¡Â 60S
Power consumption: ¡Â 0.5W
The working temperature: -10-50 centigrade (the nominal temperature 20 centigrade)
Working humidity: 95%RH (nominal humidity 65%RH)
Service life: 3 years
Size: 42mm x 32mm x 20mm
The output: analog voltage signal output
Heating voltage: 5V +/- 0.2V (AC / DC)
Working current: 5-10mA
Detectable concentration range: PH0-14
Detection Temperature range: 0-80 Celsius
Response time: <5S
Settling Time: <60S
Component Power: <0.5W
Working temperature: -10 ~ 50 Celsius (nominal temperature 20 Celsius)
Humidity: 95% RH (nominal humidity 65% RH)
Module Size: 42mm * 32mm * 20mm
Output: analog voltage signal output
With 4pcs M3 Mounting Holes
Package Included:
1 x PH Meter
Care and maintenance
Preparation before use:
1. Gently remove the protective bottle from the top of the electrode and store it for use.
2. Clean the white deposited salt on the outside of the electrode with deionized water.
3. In order to maintain an appropriate penetration rate, the liquid level in the tube must not exceed the end of the spiral glass tube, and at least 1 inch (2.5 cm) above the sample liquid level, and the electrode bulb end should be completely placed in the measured liquid when in use. Let the bulb come into full contact with the liquid to be tested to make it produce an ion reaction effect.
4. Gently shake the electrode (just like shaking the thermometer) to remove air bubbles in the electrode. 5. Immerse the electrode in the pH electrode storage solution for 1 hour. If there is no electrode storage solution, add 1gKCl to 200mL pH7 buffer as a temporary electrode storage solution. When the electrode is not in use, a long-term storage solution can be configured to activate and protect the bulb end. The preparation method can add 10mL3.3kcl solution to 200mLpH4 buffer solution. [3.3KCL is saturated potassium chloride, the configuration method weighs 23 grams of potassium chloride and 100ml of deionized water] Appropriate amount of preservative
Second, the precautions when using the electrode:
1. Use fresh buffer
2. Open the electrode protective sleeve
3. Measure the gap and rinse the electrode with deionized water
4. Stir the buffer and sample: a) Always stir at the same rate; b) Stir first and then measure 5. When preparing for the pH electrode, rinse the electrode with distilled water before and after the measurement. Use a linen-free cloth to absorb excess water from the electrode head to avoid rubbing the electrode bulb, otherwise static electricity will be generated and interfere with the accurate pH measurement.
6. Make sure that the buffer temperature is the same as the sample temperature. If the sample temperature is different, use a temperature compensation probe for temperature compensation.
7. Regularly check the electrode slope with the two-point calibration method. When the electrode reading drifts or the slope is lower than 92%, please clean the electrode according to the electrode cleaning.
3. Maintenance of electrode:
1. Electrode cleaning General cleaning solution-immerse the electrode in 0.1M HCl or 0.1M HNO3 solution for 15 minutes, then immerse the electrode in the electrode storage solution for 30 minutes.
2. Blockage of the liquid junction (salt precipitation) Causes: hard water, mud, organic matter, floating microorganisms in the water, moss, etc. Attached to the seepage sand core around the bulb and PTFE, the external reference electrode does not work properly.
Solution: immerse the electrode (60¡É) in hot water for 15-20 minutes;
Immerse the electrode in a hot saturated KCl (60°C) solution for 20-30 minutes and cool to room temperature; soak the electrode in pH 4 buffer for 20 to 30 minutes.
Check for excessive crystals. If so, rinse the crystals repeatedly with deionized water to check whether the flow rate is normal. If not, soak the electrode in hot water (60¡É) for 15-20 minutes;
Immerse the electrode in a hot saturated KCl (60°C) solution for 20-30 minutes and cool to room temperature; soak the electrode in a pH 4 buffer solution for 30 minutes. Immerse the electrode tip in concentrated HCl for 5-10 minutes, rinse the electrode, and check that the electrolyte flow rate is normal. If the junction is still clogged, pull the junction (do not touch the glass bulb)
4. Precipitation of inorganic substances on the pH-sensitive membrane Cause: inorganic sample measurement Solution: clean with EDTA, ammonia or acid
5. Dehydration of pH sensitive membrane Causes: improper storage, long-term use, high temperature operation or strong alkaline solution, resulting in slow and unstable response
Solution: Activate the electrode, soak the electrode in 0.1 M HCl for 1 minute, rinse with tap water for 30 seconds, soak the electrode in 0.1 M KOH for 1 minute, rinse with tap water for 30 seconds, calibrate the test electrode with buffer, if it still does not work, Repeat the above steps for up to 3 times. 6. The PH electrode is used for a long time, and the necessary cleaning and maintenance of the electrode are not used correctly in the tested environment, resulting in unstable electrode data and other factors.
Solution: After the electrode is used for 2-3 months, perform a bulb cleaning on the electrode and an inspection on the wetted part. Solution: Take the electrode out of the environment to see if there is dirt on the surface of the bulb. If there is any, you can wipe it gently with ethanol cotton and then clean it with deionized water. [Note that the bulb is fragile, you should pay attention to the process of wiping]. Then check the liquid contact part to see if there are contaminants attached to the surface. If there is, you can use deionization to rinse. You can also shake the electrode back and forth in the measuring cup. If the water quality is not clean, change the water until the dirt disappears. . Then wash the electrode and place it in the activation solution for 8 hours, then measure it in the standard solution to restore it to the measurement state