Sewage online dissolved oxygen meter

Kaidi Fluorescence Dissolved Oxygen Analyzer MIK-DY2900 Sewage Treatment 2018 is one of the intelligent online chemical analysis instruments, which is widely used in thermal power, chemical fertilizers, metallurgy, environmental protection, pharmaceuticals, biochemicals, food, tap water and other solutions. Continuous monitoring of oxygen, saturation, oxygen partial pressure and temperature. The continuous monitoring data can be remotely monitored and recorded through the transmission output and connected to the recorder. It can also be connected to the RS485 interface through the MODBUS-RTU protocol, which can be easily connected to the computer to achieve monitoring and recording. 2.8-inch 12864 dot matrix screen adopts isolated transmission output, interference Lower degree using isolated RS485 communication, DO/SAT/OPP measurement, temperature measurement, upper and lower limit control, transmission output, RS485 communication can be configured temperature manual, automatic compensation function can set high and low alarm function, and hysteresis Buzzer, LCD backlight switch function can be set to select language, currently supports Chinese and English, air calibration technical indicators 1. Measuring range: 0 ～ 200.0 ug/L, 0 ～ 20.00 mg/L, automatic range switching; 0~ 60℃　　 2. Resolution: 0.1ug/L, 0.01mg/L, 0.1℃　　 3. Accuracy: ug/L: ±1.0%FS; mg/L: ±0.5%FS, ±0.3℃　　 4. Automatic temperature compensation: 0~60℃　　 5. Control interface: two groups of ON/OFF relay contacts, divided into high point and low point alarm signal photoelectric isolation output. 6. Signal isolation output: photoelectric coupler isolation protection 4～20mA signal output 7. Relay: Relay hysteresis can be set arbitrarily, relay load is 10A 220VAC　　 8. Working conditions: ambient temperature is 0~60℃, relative humidity is less than or equal to 90%　　9 . Output load: load<500Ω(0-10mA), load<750Ω(4-20mA)　　10. Working voltage: 220VAC±10%, 50/60Hz　　11. Size: 96×96×115 mm　　12. Hole size: 92×92mm　　 13. Weight: 0.9Kg　　 Electrode use and maintenance During measurement, the electrode should be cleaned in distilled water (or deionized water) first, and the water should be absorbed with filter paper to prevent impurities from being carried into the measured liquid, 1/th of the electrode 3 should be inserted into the solution to be tested. The electrode should be cleaned when not in use, and inserted into a protective cover with 3.5 mol potassium chloride solution, or inserted into a container with 3.5 mol potassium chloride solution.　　 Check whether the terminal is dry, if it is dirty, wipe it with absolute alcohol and blow it dry before use.　　 Avoid long-term immersion in distilled water or protein solution, and prevent contact with silicone grease.　　 For the electrode that has been used for a long time, its glass film may become translucent or attached with deposits. In this case, it can be washed with dilute hydrochloric acid and rinsed with water.　　The electrode has been used for a long time, and when there is a measurement error, it must be calibrated with the meter. Make corrections.　　 When the electrode is still unable to be calibrated and measured when the electrode is maintained and maintained by the above methods, it means that the electrode has failed. Please replace the electrode.　　Instrument function setting　　6.1. Main menu 　　DO value is the main display, temperature value, high and low alarm setting value and current value are secondary display. Right above is the current measurement value, 25.0℃ is the current temperature value, H: 20.0 is the high point alarm value, L: 0.0 is the low point alarm value, and D: 0.0 is the hysteresis. When the value is less than 0.20mg/L, the range will automatically switch and display ug/L　　 6.2.DO calibration zero point calibration anaerobic water preparation: add 5% anhydrous sodium sulfite (Na2SO3) to 250ml of distilled water to make a saturated solution, that’s it Treated as anaerobic water, the default oxygen content in the water at this time is 0mg/L. Press the MENU key to enter the zero calibration menu 1, as shown below.　　 (Note: Normally the zero point has been calibrated at the factory, direct slope calibration) 　　 Rinse the dissolved oxygen electrode with distilled water, put it in an oxygen-free aqueous solution, leave it for a while, wait for the digital display after DO to stabilize, press ENTER to confirm storage.