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Vzor MAPK-303T Operation Manual

Dissolved oxygen meter
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MAPK-303T
DISSOLVED
OXYGEN
METER
Operation Manual
АЯ 74
Nizhny Novgorod
2010

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Summary of Contents for Vzor MAPK-303T

  • Page 1 MAPK-303T 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, PB 253 Telephone: + 7 (831) 229-65-67, 412-29-40 E-mail: market@vzor.nnov.ru...

  • 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 characteristics ..................4 1.3 Technical data ....................6 1.4 Analyzer components ..................7 1.5 Design and operation ..................7 1.6 Measuring instruments, tools and appliances ..........27 2 INTENDED USE ....................

  • Page 4: Description And Operation

    1 DESCRIPTION AND OPERATION 1.1 Purpose 1.1.1 Product name and identification MAPK-303T dissolved oxygen analyzer TU 4215-029-39232169-2008. Analyzer application: highly sensitive measurements of dissolved oxygen mass concentration (within microgram range) mostly on heat engineering facilities to control deaerated water. The analyzer can also be used for measurement of mass concentration of water-dissolved oxygen and temperature of surface and waste water, drinking water, in fish farms, flow processes, training processes and ecology.
  • Page 5 1.2.5 Permissible concentrations of ingredients not to be measured:  dissolved ammonia, ppm, max …..……………………………………. 40.0;  dissolved phenol, ppm, max …………..…………………………………. 0.2. 1.2.6 Operating conditions:  ambient air temperature, C ……………….……………… plus 1 to plus 50;  ambient air relative humidity at a temperature of plus 35 С and below without moisture condensation, %, max .……………………………………………...

  • Page 6: Technical Data

    1.3 Technical data 1.3.1 Range dissolved oxygen concentration (hereafter “DOC”) measurements at analyzable fluid temperature of 20 С, ppm ...……... from 0 to 10. The upper limit of DOC measurement range shall be governed by the analyzable fluid temperature and is shown in Table 1.2. Table 1.2 t, C DOC,...

  • Page 7: Analyzer Components

    1.3.13 Instability of analyzer readings on DOC measurements for an 8-h period, ppm, max ...……………………….……………....± (0.0015 + 0.02C). 1.3.14 When connected to a PC through a USB jack, the analyzer communicates with the PC. 1.4 Analyzer components MAPK-303Т dissolved oxygen analyzer is composed of: ...
  • Page 8 1.5.2 Analyzer operating principle To measure water-dissolved oxygen content, the analyzer is furnished with amperometric probe working as a closed polarographic cell. Electrodes are submerged in the internal electrolyte solution which is isolated from the measurable fluid by a membrane permeable for oxygen and impermeable for the liquid and water vapors.
  • Page 9 MAPK 303 ОXYGEN METER MODE READ MENU RECORD ENTER EXIT Fig. 1.1 Fig. 1.1b shows the design of the oxygen probe. Basic components of the probe include a platinum cathode 7 and a silver anode 8. The cathode 7 bears a Teflon film 10 secured by nylon threads 9. The membrane and the rubber bushing make the membrane assembly 11 put onto the bushing and filled with electrolyte 13.
  • Page 10 The blue key is used to turn on and off the analyzer. It is to be held depressed for 2 s. The key is used: – in measurement mode − to shift to the analyzer calibration mode. It is to be held depressed for 0.5 s; –...
  • Page 11 1.5.5 Measurement mode 1.5.5.1 Measurement displays Display screens in the mode of DOC measurement in ppb and in ppm are shown in Fig. 1.2 and 1.3, respectively. 24 Sep. 13:56 28 Sep. 10:58 125.0 3.55 SALT SALT 22.5 С 20.5 С 25 ppt 25 ppt Fig.
  • Page 12 Display illumination is turned on and off using key EXIT According to 1.5.8 (menu option ADDITIONAL SETTINGS), a time period in seconds when illumination is on if any of the keys is depressed, may be set up. If the display shows intermittent messages or dashes rather than DOC or temperature values and the audible overload signal is on, refer to 1.5.9.
  • Page 13 1.5.7 View of entries in the scratchpad READ To view entries, depress key for 0.5 s in the measurement mode. ► The display LIST OF FOLDERS shall show the list of folders made by a user. The SHARED FOLDER comes first in the list. The other folders shall appear in the order they have been made.
  • Page 14 SHARED FOLDER SHARED FOLDER - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - ►05 Jan.
  • Page 15 To move from the measurement mode to the MENU mode, depress the key MENU for 0.5 s. MENU display is shown in Fig. 1.10. ▼ MENU ►DATE TIME METER PARAMETERS ADDITIONAL SETTINGS SCRATCHPAD EDITOR SALINITY Fig. 1.10 To exit from any display of MENU, depress the key EXIT MENU MODE...
  • Page 16 1.5.8.2 ► METER PARAMETERS menu command ► METER PARAMETERS is the menu command to view parameters of the electrode system. On selection of this menu command, the display shown in Fig. 1.12 shall come up. METER PARAMETERS ► PROBE CURRENT 2.5 μA SHIFT +2.3 ppb INITIAL SETTINGS...
  • Page 17 SHIFT +2.4 Fig. 1.14 MENU MODE Using the keys set the shift value required. Shift setting ▼ ▲ makes it possible to reach the analyzer zero readings holding the probe in a fresh "zero" solution for at least 40 min. The figure changes in the range from minus 2.9 to plus 2.9 ppb.
  • Page 18 1.5.8.3 ► ADDITIONAL SETTINGS menu command ► ADDITIONAL SETTINGS is the menu command used to set the time of automatic deactivation and time of automatic illumination as well as to turn on or off the option reminding about calibration. On selection of this menu command, the display shown in Fig. 1.17 shall come up.
  • Page 19 AUTOSHUTDOWN ► OFF 15 min 30 min Fig. 1.19 If the cursor is moved against OFF, automatic deactivation shall not work. RECORD Select the parameter needed and depress the key. ENTER ► REMINDER is the sub-menu command intended to switch off the calibration remind command.
  • Page 20 ► AVERAGING is the sub-menu command used to set time for averaging the measured DOC value. On selection of this sub-menu command the display shown in Fig. 1.22 shall come up. AVERAGING TIME 15 s ► 30 s 60 s 120 s Fig.
  • Page 21 The cursor is always moved to SHARED FOLDER first. To clear a folder with entries, paste it using the cursor and press the RECORD ENTER The display shall show the name and content of the folder as shown, for instance, in Fig. 1.25. SHARED FOLDER - - - - - - - - - - - - - - - - - - - - - - - - - - 25 Jan.
  • Page 22 CREATE A FOLDER Not more than 16 symb _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ ABCDEFGHIJKLM 12345 NO►P◄QRSTUVW 57890 _()./ Fig. 1.27 To enter the name of a folder, paste any character using the cursor "► ◄". READ MENU MODE...
  • Page 23 4 DELETE FOLDER display is shown in Fig. 1.29. The folders are saved in the order they have been made. DELETE FOLDER POINT 1 ► POINT 2 POINT 5 POINT 3 POINT 4 Fig. 1.29 RECORD To delete a folder, paste the folder using the cursor. Press the key .
  • Page 24 RECORD Press the key and "SAVED!" message shall appear at the screen ENTER bottom for 2 s and the analyzer shall go over to the MENU display. SALINITY Fig. 1.31 1.5.9 Warning displays On appearing displays shown in Fig. 1.32-1.35, refer to 2.6 of the Operation Manual (Troubleshooting.
  • Page 25 The display shown in Fig. 1.34 comes up 24 Sep. 13:56 when analyzable fluid temperature is below 0 С. 1258 t < t −16.5°С SALT 25 ppt Fig. 1.34 The display shown in Fig. 1.35 comes up 24 Sep. 13:56 on measuring DOC values over 150 ppm.
  • Page 26 The display shown in Fig. 1.37 comes up in the event of analyzer program failure. Refer to 2.6 of the Operation Manual METER SETTINGS (Troubleshooting. Table 2.1). ERROR DEFECT METER! Fig. 1.37 The display shown in Fig. 1.38 comes up in the event of analyzer program failure.

  • Page 27: Measuring Instruments, Tools And Appliances

    1.6 Measuring instruments, tools and appliances The analyzer maintenance shall additionally require the following tools and appliances not included into the delivery set:  2 mm cross screwdriver;  В-1-250 beaker;  КН-100-19/26 flask;  chemically pure hydroquinone;  chemically pure sodium or potassium hydroxide.

  • Page 28: Intended Use

    2 INTENDED USE 2.1 Operating limitations 2.1.1 The MAPK-303Т analyzer is mostly used to measure DOC in deaerated water. Permissible concentrations of a number of ingredients that affect the measurement results are set out in 1.2.5. 2.1.2 When using the analyzer, protect the oxygen probe against any shock since its design uses glass.
  • Page 29 2.3.1 Connection of power supply To connect power supply, remove the dry cell compartment cover on the rear panel of the convertor unit. Install two AA alkaline dry cells or two charged AA nickel-metal hydride batteries according to marking in the compartment. Close the dry cell compartment cover.
  • Page 30 Check for analyzer's workability is to be carried out:  after filling the probe with electrolyte on receiving the analyzer;  after replacement of the membrane assembly or Teflon film;  if analyzer operation raises doubts. 2.3.3.1 Preliminary analyzer calibration Turn on the analyzer.
  • Page 31 AUTOCALIBRATION AUTOCALIBRATION 8.56 MEASURING t=25.3C p = 99.9 kPa t=25.3C p = 99.9 kPa Fig. 2.3 Fig. 2.4 4 Press the key RECORD . The display shown in Fig. 2.5 shall come up. ENTER CALIBRATION COMPLETED PRESS ANY KEY Fig. 2.5 If displays shown in Fig.
  • Page 32 2.3.3.2 Check for readings in the "zero" solution Prepare oxygen-free ("zero") solution. To do so:  prepare alkali solution (KOH or NaOH) of 5 ppt concentration;  transfer the solution to a 0.3-0.5 dm vessel to 50-60 mm capacity; and ...
  • Page 33 2.3.4 Analyzer atmospheric air calibration ("automatic") Automatic analyzer calibration is undertaken:  when the meter is new;  on a shift basis (8 h); and  after replacement of electrolyte, membrane or Teflon film. The analyzer may be calibrated in atmospheric air of temperature from plus 15 to plus 35 С...
  • Page 34 Probe Flask Water Fig. 2.10  Probe position in a flask on analyzer calibration 4 Press the key RECORD . The display shown in Fig. 2.11 shall come up, first, ENTER and then the display shown in Fig. 2.12. The display shall show the measured DOC value with regard to calibration coefficients of the previous calibration.
  • Page 35 If displays shown in Fig. 2.6 and Fig. 2.7 have come up, refer to 2.6 "Troubleshooting". After calibration the analyzer is available for operation. Note − Analyzer calibration against atmospheric air may be cancelled prior to operation 5 depressing the key .
  • Page 36 Capillary tube Rotameter Bottle with CGM Transducing block Oxygen probe (for calibration) Distilled water Fig. 2.14 1 Press the key . The display shown in Fig. 2.15 shall come up. ◄ CALIBRATION ► AUTOMATIC MANUAL Fig. 2.15 2 Move the marker to MANUAL command and depress the key RECORD .
  • Page 37 MEASURING UNITS ► ppb % vol. Fig. 2.16 3 Move the marker to the "% vol." command and press the key RECORD . The ENTER display shown in Fig. 2.17 shall come up, first, and then the display shown in Fig. 2.18. MANUAL CALIBRATION MANUAL CALIBRATION 8.56...
  • Page 38 shown in Fig. 2.19 with entered value of oxygen volume concentration in the CGM in % vol. MANUAL CALIBRATION ILLIGAL VALUE Fig. 2.20 If displays shown in Fig. 2.6 and Fig. 2.7 have come up, refer to 2.6 "Troubleshooting". Notes 1 Analyzer calibration against CGM may be cancelled prior to operation 4, depressing the key .
  • Page 39 1 Move the marker to MANUAL command and depress the key RECORD . The ENTER display shown in Fig. 2.22 shall come up. MEASURING UNITS ► ppb % vol. Fig. 2.22 2 Move the marker to the "ppb" command and press the key RECORD .
  • Page 40 If a value below 50.0 ppb or above 20.000.0 ppm is entered, the display shown in Fig. 2.20 shall appear for 2 s, and then the analyzer shall go over to the display shown in Fig. 2.24 with entered DOC value. If displays shown in Fig.

  • Page 41: Measurement Procedure

    MENU MODE Using the keys set the needed value comprising the total of ▼ ▲ analyzer reading on probe holding in the "zero" solution and previously preset shift. The range of the values to be set varies from minus 2.9 to plus 2.9 ppb. Depress key RECORD and "SAVED!"...
  • Page 42 The flow-through cell is supplied being mounted on a special support with the convertor unit as shown in Fig. 2.27. Prior to measurements using the flow-through cell, loosen the oxygen probe protective sleeve to separate from the cable sleeve and remove it (Fig. 2.26а). Loosen the nut of the lower flow-through cell nipple and remove it.
  • Page 43 Feed controllable water to the flow-through cell. Place the cell with the probe so that the probe takes almost vertical position with the membrane downward. Allow water to easily flow through the cell within at least 10 min so that air bubbles are not present in the water flow running through the cell.

  • Page 44: Inspection Of Condition

    Note – In analyzer service:  prevent probe membrane dry condition. For breaks in measurements the probe is to be kept in water. Preferably it should be kept in the flow-through cell filled with controllable water. To prevent water drain, hoses of inlet and outlet nipples may be connected using a short tube;...
  • Page 45 Table 2.1 Trouble Probable cause Remedy 1 With power ON display Poor contact in the dry Open cell shows no indications and cell compartment compartment and clean readings contacts of dry cells or batteries Supply voltage is below 2.3.1. Replace dry cells the allowable value or charge batteries 2 With power ON display...
  • Page 46 Table 2.1 continue Trouble Probable cause Remedy 8.1 Analyzer readings change Torn membrane 2.6.4. Replace rapidly and are unstable. membrane assembly analyzer calibration Dirty electrolyte 2.6.3. Replace against atmospheric electrolyte display with "CALIBRATION Moisture ingress into Dry up the convertor IMPOSSIBLE.
  • Page 47 2.6.2 Membrane cleaning To clean the probe membrane, use a piece of cotton wool wet with alcohol. The probe membrane may be submerged in a weak solution (2 %) of sulfuric acid for about 1 h and then flushed under running water. 2.6.3 Filling (refilling) the probe with electrolyte Filling the probe with electrolyte is required on receiving the meter from the manufacturer since it is supplied dry (without electrolyte).
  • Page 48 Cable sleeve Body Syringe Sleeve with electrolyte Nylon threads Teflon film Membrane assembly Membrane а Remove Protective sleeve Remove Fig. 2.28  Pattern of probe disassembly for electrolyte filling and replacement, replacement of Teflon film and membrane assembly Loosen and remove the protective sleeve from the probe according to Fig.
  • Page 49 The film should closely keep to the cathode and have no creases. If the film has mechanical damages, it is subject to replacement. On removing the Teflon film, inspect the probe electrodes:  platinum cathode 1 (Fig. 1.1b) embedded into a glass tube should be clean;...
  • Page 50 2.6.6 Setting of initial analyzer parameters A provision is made in the meter for setting the analyzer initial parameters including shift (zero shift) and slope which corresponds to an "average" probe. This makes it possible to start calibration with preset initial conditions. The mode is to be used if analyzer calibration performance is doubtful.

  • Page 51: Maintenance

    3 MAINTENANCE Analyzer maintenance comprises:  analyzer calibration against atmospheric air (2.3.4) to be carried out at least once every 10 days;  analyzer shift setting (2.3.6) to be carried out every three months;  probe cycling (2.3.3) to be carried out if the analyzer downtime exceeds 24 h.

  • Page 52: Distilled Water Depending On Temperature

    ATTACHMENT A Solubility of 100%-humidity air oxygen in distilled water depending on temperature (reference) Р = 101.325 kPa Table A.1 in ppm 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 13.90...
  • Page 53 Table A.1 continue 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 6.05...

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