PFG-3085 online fluoride ion detector instruction manual Chapter Overview PFG-3085 online fluoride ion detector is an intelligent fluoride ion detection instrument produced by our company. The material is made of new cast aluminum alloy, with equal height protection and instrumentation. The on-line monitor for measuring fluoride ion is suitable for the value of fluoride ion measured in the presence of fluoride ion. basic skills High intelligence: On-line fluoride ion meter adopts high-precision AD conversion and single-chip micro-processing technology, which can complete fluorine ion concentration and temperature measurement, automatic temperature compensation, instrument self-test and other functions. High reliability: Component integration, without complicated function switches and adjustment knobs. Strong anti-interference ability: Adopt new device, current output adopts photoelectric coupling isolation technology, strong anti-interference ability, realize remote transmission. Has good electromagnetic compatibility. Waterproof and dustproof design: Protection and other IP65, suitable for outdoor use. Automatic timing calibration: Make sure the instrument measures stability and reliability. RS485 communication interface: It can be easily connected to the computer for monitoring and communication. Solution grounding: Eliminate ground loop interference. main feature Chinese LCD operation menu, Chinese note: Adopting the menu structure, it is similar to the operation of the microcomputer, the operation is simple, and the Chinese steps of the operation steps are all available. It can be conveniently completed without the instruction. Simultaneous display of multiple parameters: Displays the concentration value, temperature, time, and status on the same screen. Notepad function: Record the operation and usage of the instrument and the alarm occurrence time for easy management. Monitoring electrical function: Each calibration method, time and results are recorded to facilitate the query and analysis of electrical changes. Digital clock function: Provides a time base for various functions. Excellent display mode: Use a liquid crystal display with backlit 192×64 dot pattern to achieve graphic and Chinese display. Adjustable uniform background light can also be clearly observed under dark outdoor conditions. Instrument stability does not crash: Watchdog program to ensure that the instrument does not work in a continuous job. Output current setting: The manual current source function can check and arbitrarily set the output current value to facilitate detection of the recorder and the lower unit. Set current output: Software selection is 0~10mA or 4~20mA output. Two calibration methods: Point and manual input zero E0 and slope S are used in various situations. Network Function: The meter retains the traditional isolated current output function. With RS485 communication interface, the meter can be easily connected to the computer for monitoring and communication. With two pairs of twisted pairs, up to 254 tables can be directly connected to the computer to form a monitoring network to realize multi-variable remote transmission (within 10 km) of digital transmission and instrument remote control and remote operation. Chapter II Technical Specifications 1. Measurement range: Fluoride ion concentration 0.2ug/L to 3000mg/L Temperature 0～99.9°C 2. Resolution: Fluoride ion concentration 0.1ug/L Temperature 0.1°C 3, automatic temperature compensation range: 0 ~ 99.9 °C, 25 °C reference 4. Accuracy: ±2.5% of reading, ±0.3°C 5, measured water samples: 0 ~ 99.9 °C, 0.6MPa 6, electronic unit automatic temperature compensation error: ± 1.5% 7. Electronic unit repeatability error: ±2.5% of reading 8, stability: ± 1.5% / 24h 9, response speed: 32 seconds @ 25 °C, 50 seconds @ 15 °C 10, clock accuracy: ± 1 minute / month 11, galvanically isolated output: 0 ~ 10mA (load <1.5 kΩ) 4 to 20 mA (load <750 Ω) 12, the output current error: ≤ ± 1% FS 13. Data storage quantity: 1 month (1/5 minutes) 14, high and low alarm relay: AC220V, 3A 15, communication interface: RS485 (optional) 16, power supply: AC220V±22V, 50Hz±1Hz 17, protection, etc.: IP68 18. Dimensions: 146 (L) × 146 (W) × 154 (D) mm Opening size: 138×138 mm 19, weight: 1.0kg 20, working conditions: ambient temperature 0 ~ 60 °C, relative humidity <85% Note: The temperature corresponding to 4 ~ 20 mA current output is optional, must be specified when ordering. If not specified, the output signal is the current output of the measured value of fluoride ion. Chapter 3 Selection and Maintenance of Electricity 3.1 Selection of electricity Relatively insoluble inorganic salts are used in solid electrical films. Solid-state electricity exists in similar and heterogeneous ways. Both types form a potential on the membrane due to the ion exchange process. Such electricity includes silver/sulfide, lead, copper, fluoride, thiofluoride, chloride, and fluoride ion selective electricity. The accuracy and stability of electricity is a key factor in determining the quality of ion meters. Especially low-conductivity water quality requires more electricity. If it is measured with ordinary electricity, the stability is bad, and the service life is short. It can not meet the ion-selective electricity (ISEs) is a sensitive membrane-based electrochemical sensor, this layer is to make electricity for specific ions Selectively responsive elements. According to the different materials of the membrane, ion selective electricity can be divided into 4 types: • Glass film (such as Na+) • Solid film (such as Pb2+) • Polymer membranes (eg K+) • Gas-permeable membranes (eg CO2) When the electricity is placed in the solution, a potential difference forms on the membrane. When the concentration of the ion to be measured in the sample changes, the change in the potential difference can be detected using ion-selective electricity and internal or external reference electrodes. In principle, the entire setup can be described as follows: The relationship between the measured potential E and the ion activity ai in the sample can be expressed in the Nernst mathematical manner as follows: E=E0 + Slope ·logai (Slope is equal to 2.3 RT/ZiF) Among them: R is a gas constant, 8.314JK-1mol-1 T is the temperature K F is Faraday equivalent, 9.6487×104 Cmol-1 Zi is the charge of the measured ion The slope is 59.16 mV/Zi at 25°C. If the measured ion is a monovalent ion such as potassium ion (Zi = +1), a change of potential of 59.16 mV can be observed at 25°C when a decimal change occurs in the concentration. Similarly, a potential change of 59.16 mV/2=29.58 mV is observed at 25°C for a divalent ion such as calcium ion (Zi=+2). E0 is the constant potential difference when each ion is selectively charged in combination with a specific reference. Ai is the ion activity, but only in the more diluted solution and the ion concentration is equal. The activity of ions depends on the ionic strength in the sample solution determined by the content of the ions. The concentration of the measured ion will be linearly offset at both its high and low ends, and this offset determines the limits of the high and low ends of the measurement. Ionization can accurately measure a sample solution with a concentration of 10-6M. The high linearity (usually higher than 0.1M) linear offset is due to the action of oppositely charged ions. 3.2 Electric maintenance The use of ion concentration meters depends largely on the maintenance of electricity. The electricity should be cleaned frequently to ensure that it is not contaminated; the electricity should be calibrated at intervals; during the period of water shutoff, it should be ensured that the electricity is soaked in the tested liquid, otherwise it will shorten its life; the cable connector must be kept clean, and it must not be exposed to moisture or Into the water. It is indeed a problem with the instrument. Please do not repair it yourself. Please contact us. Cleaning Good ion-selective electricity can be stabilized within two minutes. However, if the membrane is contaminated with oil or particles in the solution, its response will be slow. Glass electric heads can be cleaned with alcohol or mild detergents, such as detergents used in laboratory cleaning dishes. Solid-state ion selective electricity can be recovered with very fine-grained polishing bars. The ion-selective electroporation of PVC can be rinsed with water. After thorough rinsing with deionized water, the electrode should be re-calibrated by soaking in a low standard solution for calibration for 2 to 4 hours. If the slope or response time of the electricity does not meet the requirements, the solid state electricity can be soaked longer before the calibration, such as night. storage Solid-state, PVC, and gas ion-induced electricity can be stored in low-level standards during measurement gaps. If solid state electricity is not used for several hours, PVC and gas ion selective electricity should not be used for a few days and should be stored dry. Please refer to the specification for details. Chapter IV Instrument Installation 4.1 Unpacking The industrial fluorine ion concentration meter consists of four parts: the secondary meter, the fluoride ion battery, the measuring cell and the connecting cable. After unpacking, please check the quantity, specifications and accessories of the instrument according to the packing list, including the following parts: 1. Fluoride ion concentration meter secondary table 2, fluoride ion 3, power cord root 4, manual 5, certificate If it is damaged, the quantity is wrong or the specifications do not match, please contact the company or distributor. 4.2 The size and installation of the secondary table The instrument can be installed in a monitoring room far away from the site, and it can also be installed on site with the measuring tank. The required connection leads from the terminal behind the secondary table.
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