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eBay Water analysis industrial online PH control system meter automatic PH controller Key attributes Industry-specific attributes Type PH meter Industry online pH/ORP controller Other attributes Place of Origin China Warranty 12 months Customized support OEM Brand Name Meacon Model Number MIK-PH160S(MIK-PH2.0), MIK-PH6.0 Product name PH controller Measure range ORP(-1900~+1900Mv),ORP(-1000~+1000Mv), about ORP,There are two options,tell us what range do you need when you order. Accuracy PH: ±0.02PH; OPR: ±1mv Resolution PH: 0.01PH; ORP: 1mv Stability PH: ≤0.02PH/24h; ORP: ≤3mv/24h Input impedance ≥10^12Ω Temperature range 0-100C; accuracy: ±0.5C Temperature compensation 0-100C (NTC 10K) Power supply AC220V±10%, 50Hz Relay output One high alarm, one low alarm(3A/250V/AC) Regular on Packaging and delivery Packaging Details package for PH controller pH/ORP Controller User Manual（Partial description） Chapter I Introduction The online pH/ORP controller is independently researched and developed, which is delivered to the monitoring room with connection trough RS485 or analog output so as to record and store. pH/ORP controller is one of the intelligent on-line chemical analyzers, which is widely used in the continuous monitoring on pH value or OPR value and temperature of thermal power,chemical engineering and fertilizer, metallurgy, environment protection, pharmacy, biochemistry, food and tap water as well as other solution.The monitoring and recording of continuous monitoring data is realized Through the connection between the Analog output and recorder, and the monitoring and recording is realized by easily linking to the computer with MODBUS-RTU protocol through connecting Characteristics • Easy operation • NEMA enclosure for field mounting and panel mounting • Automatically Temperature Compensation • Directly switchable to pH or ORP • Large LCD display with background lighting • pH or ORP sensors can be connected thanks to the sensor supply integrated in the output • Using the setup program: user-friendly programming • 4-20mA analog output • RS485 communication pH/ORP sensor User Manual（Partial description） Chapter 1 Brief Introduction The principle of pH/ORP sensor measurement is electrochemical method and galvanic battery principle. The primary battery is a system whose function is to turnchemical energy into electrical energy. The voltage of this battery is called electromotive force (EMF) which is made up of 2 half-cells, of which one is called a measuring cell whose potential is related to specific ionic activity; the other is a reference half-cell, commonly known as a reference sensor, which is generally interlinked with the measuring solution and is connected to the measuring instrument. The potential difference produced by the galvanic interaction inside the sensor is transmitted to the pH controller, and the corresponding algorithm is transmitted to display the pH value. Chapter 2 Precautions (1) The conventional lead wire of the sensor is a 2-core or 4-core shielded wire. Customers are forbidden to cut or connect lead wires privately; otherwise, we are not liable for the consequences. (2) It shall avoid soaking in distilled water or protein solutionsfor a long time and prevent contact with silicone oil. (3) When the sensor is used for a long time, its glass film maybecome transparent or be attached with sediment. At this time, it can be washed with dilute hydrochloric acid and flushed with water. (4) When you still can not carry out the correction program and normal measurement after you maintain the sensor, it indicates that the sensor has been unable to restore response, and you should replace the sensor. (5) The pH sensor wire is not waterproof, so it shall beavoided to be contact with water as far as possible. (6) The service life of sensors is one year of normal use, which will be shortened because of bad environment or improper maintenance. Chapter 3 Maintenance (1) An appropriate amount of 3.3 mol/LKCL solution is contained in the protective cover at the front part of the sensor, in which the sensor head is immersed so as to maintain the activation of the sensitive membrane and the liquid junction. (2) When the sensor is used, the front transparent protective cover needs to be removed, and the glass bubble and the liquid junction be immersed in the solution for use. (3) Before installation, make sure to use thread seal tape (at 3/4 threads) for aterproofing and sealing to avoid water into the pH sensor, resulting in short circuit of the pH sensor cable. (4) When measuring, it shall be washed in distilled water (or deionized water) and dried with filter paper to prevent impurities from entering the measured liquid. The sensor sensitive membrane and the liquid junction shall be completely immersed in the measured liquid. (5) Check whether the connecting terminal is dry. If there is contamination, please wipe it with anhydrous alcohol and blow dry it for use. (6) It is suggested that users clean the sensitive membrane 3 Chapter 3 Maintanence and liquid junction in front of the sensor periodically and coordinate with the instrument correction regularly. (7) When the sensor is not used, it shall be washed and inserted into the protective cover with saturated KCl solution. Chapter 5 Calibration (1) It is recommended to calibrate the sensor by three-point method. The pH 4.00 buffer solution is usually used for positioning first, then the pH 6.86 and pH 9.18 buffer solutions are used sequentially to determine the slope,calibration points are selectable in the meter. (2) After the sensor is connected to the instrument, please connect the instrument to the power supply to preheat it for 30 minutes before performing the alibration. (3) When performing the calibration of calibration sensor, it shall be noted that the sensor can not be placed flat, but shall be placed vertically (please put the sensor sensitive membrane downward) to prevent deviation of the sensor mV data. (4) For sensors with temperature compensation, switch the controller to automatic temperature compensation. Chapter 6 Signal Parameters Sensor slope: The slope of the glass sensor is 59.16 mV at 25 ℃ theoretically, i.e. potential change of 59.16 mV for each pH change in the solution.But in fact, neither glass sensor can reach the theoretical value 100%; in general, the sensor slope is more than 98% of the theoretical value (percentage slope). In addition, the mV difference corresponding to each unit pH value varies under different temperatures.The conversion of temperature to electric potential difference is as follows: △E=59.16*[(273+T)/298]*△pH Track Page Views With Auctiva’s Counter
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