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Summary of Contents for Vzor MAPK-302E
- Page 1 MAPK-302E DISSOLVED OXYGEN METER Operation Manual АЯ 74 Nizhny Novgorod 2010...
- Page 2 VZOR will appreciate any suggestions and comments aimed at product quality improvement. If you have any trouble with the instrument performance, please contact us in writing or by phone. Postal address: 603106, Russia, Nizhny Novgorod, POB 253 Telephone: + 7 (831) 229-65-67, 412-29-40 E-mail: market@vzor.nnov.ru...
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Page 3: Table Of Contents
C O N T E N T S 1 DESCRIPTION AND OPERATION ............... 4 1.1 Purpose ......................4 1.2 Basic parameters ..................... 4 1.3 Specifications ....................6 1.4 Product components ..................7 1.5 Description and operation ................7 1.6 Measuring instruments, tools and accessories ..........10 2 INTENDED USE .................... -
Page 4: Description And Operation
1 DESCRIPTION AND OPERATION 1.1 Purpose 1.1.1 Product name and designation MAPK-302E dissolved oxygen analyzer TU 4215-022-39232169-2008. 1.1.2 The analyzer has been designed to measure the dissolved oxygen concentration and water temperature. 1.1.3 The analyzer may be used to measure the mass concentration of wa- ter-dissolved oxygen and temperature of surface, waste and drinking water, and may be employed by fish farms;... - Page 5 рН ……………………………………………………….…….…..4 to 12; rate of water flow relative to sensor membrane, cm/s ….…………...…... 5. 1.2.6 Permissible concentrations of unmeasured components: dissolved ammonia, mg/dm , max ….…...…………………..………..40,0; dissolved phenol, mg/dm , max ….………….………………..…………. 0,2; ...
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Page 6: Specifications
1.3 Specifications 1.3.1 DOC (dissolved oxygen concentration) measuring range at an analyte temperature of 20 °С, mg/dm ..………………………………….……..….. 0 to 10,00. The upper limits of DOC measuring range, depending on the analyte tem- perature, are shown in Table 1.2. Table 1.2 t, °C DOC, 17,45 15,29 13,48 12,10 10,00 9,85 8,98 8,30 7,69 7,12 6,59... -
Page 7: Product Components
protective cap. 1.5 Description and operation 1.5.1 General analyzer data The MAPK-302E dissolved oxygen analyzer is a small-size microprocessor device designed to measure the mass concentration of water-dissolved oxygen (DOC) and the analyte temperature. The DOC values measured in mg/dm... - Page 8 1.5.2 Analyzer operating principle The analyzer uses an amperometric sensor operating as a closed-type polarographic cell. The electrodes are submerged in an internal electrolyte solution which is separated from the analyte by a membrane penetrable for oxygen but im- penetrable for liquid and water vapor. From the analyte, oxygen diffuses through the membrane into a thin layer of electrolyte between the electrodes and the mem- brane and undergoes an electrochemical reaction on the surface of the cathode which is polarized by external voltage applied cross the electrodes.
- Page 9 Converter unit 1 has a sealed plastic housing and is designed to convert sig- nals from oxygen sensor 2 and display measurement data. The front panel of the converter unit features: indicator screen 3 designed to display a measured DOC value or temper- ature (depending on the chosen measuring mode), battery charge and current time (in off state);...
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Page 10: Measuring Instruments, Tools And Accessories
1.6 Measuring instruments, tools and accessories 1.6.1 The following tools and accessories, which are not included in the de- livery set, will be additionally required for maintenance of the analyzer: 2 mm cross screwdriver; В-1-250 beaker; КН-100-19/26 flask; ... -
Page 11: Intended Use
2 INTENDED USE 2.1 Operating limitations 2.1.1 The MAPK-302E analyzer version is used to measure DOC in wastewater and surface water, including muddy and colored water with organic pollutants. 2.1.2 Para.1.2.5 provides permissible concentrations for a number of com- ponents which affect measuring results. - Page 12 2.3.1 Power supply connection To connect the power supply, remove the battery compartment cover located on the rear panel of the converter unit. Install two AA-type alkaline batteries ob- serving the polarity marking inside the battery compartment. Replace the battery compartment cover.
- Page 13 2.3.3 Analyzer functional check The analyzer functional check includes: analyzer precalibration by atmospheric air oxygen; check of readings in the null solution. It is recommended that the analyzer functional check be performed: after filling the sensor with electrolyte on delivery of the analyzer; ...
- Page 14 membrane. The displayed analyzer reading should decrease slowly. Take the analyzer readings in 10 min. They should vary within ±50 µg/dm With the above procedure successfully completed, the analyzer is ready for normal service. The analyzer calibration by outside air shall then be performed as per para.2.3.4.
- Page 15 2.3.4 Analyzer calibration by outside air Outside air calibration of the analyzer should be performed: when the device is new; once a shift (8 h); after replacement of electrolyte, membrane and teflon film. Calibration of the analyzer is performed in the outside air at temperatures be- tween +15 °С...
- Page 16 Once calibrated by outside air, the analyzer is ready for use. Note − Outside air calibration of the analyzer may be cancelled before Step 3 by pressing MODE. The analyzer will go into the DOC measuring mode, retaining the values of previous calibration coefficients. 2.3.5 Analyzer zero calibration Analyzer zero calibration allows the sensor residual zero current to be com- pensated within narrow limits (–3,0 to +3,0 µg/dm...
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Page 17: Measurement Procedure
2.4 Measurement procedure 2.4.1 Measurements in reservoir Before measuring in reservoir it is important to put protective cap off and submerge the probe in the analyte reservoir as deep, as important. Permit water flow, moving the probe up and down with azimuth angle of 10-15 cm once in 2-5 s (if there is a water flow in the reservoir, the probe may be motionless). - Page 18 Probe Rubber ring Flask Stir bar Fig. 2.2 Turn the meter on. With button “MODE” choose indication of DOC in mg/dm or % sat. The speed of water flow of analyte water along the membrane should be min 5 cm/s. In stationary fluid the measurements would lower slowly. The measuring process before getting the fixed value is max 2 min.
- Page 19 Allow for the analyzer readings to be set and record them as a measuring result. 2.4.5 Calculation of dissolved oxygen concentration by analyzer read- ings, with allowance for the salt content When measuring DOC in salty water, use the correction factor α, by which the analyzer readings should be multiplied.
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Page 20: Functional Check
when brought into a warm room from the cold air, prior to enabling, hold the analyzer at room temperature for at least 1 hour in order for condensed mois- ture to evaporate. 2.5 Functional check A serviceable analyzer should meet the following requirements: ... - Page 21 Table 2.2 (Continue) Trouble, symptoms Probable cause Remedy 3 When the zero point of Ruptured or punctured Para.2.6.3, 2.6.4. Replace measuring range membrane, sensor the membrane and elec- checked, analyzer readings seal failure trolyte go beyond ±0,050 mg/dm Moisture inside Dry the converter unit for converter unit 3-4 days...
- Page 22 Table 2.2 (Continue) Trouble, symptoms Probable cause Remedy 8 During measurements, Ruptured membrane Para.2.6.4. Replace the Е5 (excess measured sen- membrane assembly sor current) is displayed on Contaminated electro- Para.2.6.3. Replace elec- the screen. Analyzer does lyte trolyte not respond to pressed but- Moisture inside Dry the converter unit for...
- Page 23 Cable bushing Case Syringe Bushing filled with Capron thread electrolyte Teflon film Membrane assembly Membrane а Remove Protective bushing Remove Fig. 2.2 − Dismantling the sensor for filling and replacement of electrolyte, replacement of teflon film and membrane assembly Remove the membrane assembly from the bushing. Draw electrolyte from SPK into a syringe.
- Page 24 WARNING: The membrane should be stretched and pressed firmly against the sensor platinum cathode. The membrane SHALL NEVER separate from the cathode! After a certain period of service, the sensor may have the volume of electro- lyte reducing due to leakage through pinholes or ruptures in the membrane, which necessitates electrolyte replacement.
- Page 25 Take a new membrane assembly from SPK and, holding the assembly verti- cally, fill electrolyte with it. Then carefully fit the assembly with electrolyte over the bushing and place the protective bushing. After membrane assembly/teflon film replacement, perform the steps de- tailed in para.2.3.3 and 2.3.4.
- Page 26 2.6.6.1 Zero shift setting 1 Switch off the analyzer. 2 Press the CAL button and, keeping it pressed, switch on the analyzer. Af- ter a sound signal release the CAL button. The screen will display с2. 3 Press the ENTER button. The donЕ capture will briefly appear on the screen and the analyzer will go into the measurement mode.
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Page 27: Maintenance
4 DELIVERY SET 4.1 The delivery set is shown in Table 4.1. Table 4.1 Description Quantity 1 MAPK-302E dissolved oxygen analyzer (with probe, cable length 5 m) 2 Protective cap 3 Spare parts kit (to oxygen probe) 4 Tool and accessory kit... -
Page 28: Appendix A. Solubility Of 100 % Humidity Air Oxygen In Distilled Water, Depending On The Temperature
APPENDIX A (reference) Solubility of 100 % humidity air oxygen in distilled water, depending on the temperature Р =101,325 кPa Table A.1 mg/dm t, °С 14,62 14,58 14,54 14,50 14,46 14,42 14,38 14,34 14,30 14,26 14,22 14,18 14,14 14,10 14,06 14,02 13,98 13,94... - Page 29 Table A.1 (Continue) mg/dm t, °С 6,41 6,40 6,39 6,38 6,37 6,36 6,35 6,34 6,33 6,32 6,31 6,30 6,29 6,28 6,27 6,26 6,25 6,24 6,23 6,22 6,21 6,20 6,19 6,19 6,18 6,17 6,16 6,15 6,14 6,13 6,12 6,11 6,10 6,09 6,08 6,07 6,06...
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