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Vzor Mark-903 Operation Manual

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MAPK-903
pH-METER
Operation Manual
АЯ 74
Nizhny Novgorod
2011

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  • Page 1 MAPK-903 pH-METER Operation Manual АЯ 74 Nizhny Novgorod 2011...
  • 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...

  • Page 3: Table Of Contents

    C O N T E N T S 1 DESCRIPTION AND OPERATION.................. 4 1.1 Purpose ........................4 1.2 Main parameters ....................... 5 1.3 Technical data ......................8 1.4 Apparatus components ..................... 9 1.5 Design and operation ....................9 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 pH-meter with a combined electrode: MAPK-903 pH-meter. TU 4215-027-39232169-2007 pH-meter with individual electrodes: MAPK-903/1 pH-meter. TU 4215-027-39232169-2007 1.1.2 Purpose pH-meter is used to measure hydrogen ion activity index (pH), aqueous solution temperature and electromotive force (U).

  • Page 5: Main Parameters

    Table 1.1 (Continue) pH-meter Type of applicable electrodes No in Manufacturer version National Register MAPK-903/1 ЭС-10601/7(К80.7) 16393-03 glass electrode ЭС-10601/4(К80.7) 16393-03 IT Measuring glass electrode Equipment NPO LLC, ЭСр-10101-3,0(К80.4) Moscow, Russia 17908-02 reference electrode ЭСр-10103-3,0(К80.4) 17908-02 reference electrode ЭСЛ-43-07СР Gomel Measuring 2875-98 laboratory glass electrode Instrumentation...
  • Page 6 Table 1.2 − pH-meter temperature compensation range Type of electrodes used pH-meter temperature compensation range, С ЭСК-10601/7(К80.7) combined glass electrode ЭСК-10601/4(К80.7) combined glass electrode ЭСКЛ-08М combined laboratory glass electrode ЭСКЛ-08М.1 combined laboratory glass electrode 201020/51-10-04-22-120/000 combined pH-electrode with gel filler from 5 to 50 ЭС-10601/7(К80.7) glass electrode ЭС-10601/4(К80.7) glass electrode...
  • Page 7 Table 1.4 − Dimensions and weight of the pH-meter main components pH-meter Identification of components Dimensions, Weight, version maximum maximum ВР48.01.000 convertor unit 0.12 MAPK-903, 6513028 MAPK-903/1 ВР48.01.400 temperature sensor 0.05 11128 ЭСК-10601/7(К80.7) glass combined electrode 12170 ЭСК-10601/4(К80.7) glass combined electrode ЭСКЛ-08М...

  • Page 8: Technical Data

    1.3 Technical data 1.3.1 Range of hydrogen-ion activity index measurements by pH-meter at analyzable fluid temperature of (25.0 ± 0.2) С, pH ..………... 0.000 to 12.000. 1.3.2 The range of pH-meter allowable basic absolute accuracy on measuring pH at analyzable fluid temperature of (25.0 ± 0.2) С and ambient air temperature of (20 ±...

  • Page 9: Apparatus Components

    1.4 Apparatus components 1.4.1 According to version and delivery set the apparatus is composed of:  convertor unit with temperature sensor;  electrodes as shown in Table 1.1; and  tools and accessories kit. 1.5 Design and operation 1.5.1 pH-meter general data MAPK-903 (MAPK-903/1) pH-meter is a small-size microprocessor instrument used to measure pH or U and temperature of aqueous solutions.
  • Page 10 The electrode system immersed in an analyzable solution generates U linearly dependent on pH value. Signals (U) from the electrode system and temperature sensor are applied to the convertor unit where they are amplified and digitized. The measured U of the pH-meter electrode system is translated into pH value in view of analyzable solution temperature, i.e.
  • Page 11 MAPK 903 pH-meter READ MODE RECORD MENU ENTER EXIT а MAPK 903 pH-meter READ MODE MENU RECORD EXIT ENTER Figure 1.1...
  • Page 12 1.5.4 Functions of keys on the convertor unit front panel The pH-meter uses non-locking keys. Symbols on the light key space show their functions in measurement mode. Symbols on the dark key space reflect their functions when working with the electronic scratchpad and display menu.
  • Page 13 The key is used: RECORD − in the measurement mode − to enter data into the electronic scratchpad. It is to be held depressed for 0.5 s; ENTER − when working with the electronic scratchpad and display menu − to confirm selected parameters and operating modes.
  • Page 14 − date (day and month) and current time. The date and time are set up as described in 1.5.8 (DATE TIME menu command); − measured pH, pH , U values. U is measured in mV. pH and U measurement modes are made accessible on pH-meter adjustment according to 1.5.8 (MEASURING MODES menu command).
  • Page 15 If the scratchpad is filled to capacity, on entering data the display shall show the message "SAVING IS IMPOSSIBLE, SCRATCHPAD IS OVERFILLED". 1.5.7 View of records in the electronic scratchpad READ To view records, depress key for 0.5 s in the measurement mode. ►...
  • Page 16 If entry in the scratchpad has been made in the pH measurement mode, the display shown in Fig. 1.7 shall come up. If entry in the scratchpad has been made in the pH measurement mode, the display shown in Fig. 1.8 shall come up. SHARED FOLDER SHARED FOLDER - - - - - - - - - - - - - - - - - - - - - - - - - -...
  • Page 17 1.5.8 MENU mode The pH-meter parameters shall be viewed and changed in the MENU mode. 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 ►PROBE PARAMETERS MEASURING MODES...
  • Page 18 The display shall show the electrode system parameters based on the last calibration: S is electrode system slope in % of the rated value; pНi and Еi are the coordinates of the electrode system isopotential point. 1.5.8.2 ► MEASURING MODES ►...
  • Page 19 ADDITIONAL SETTINGS ► SETTING рНi 7.00 AUTOSHUTDOWN AUTOBACKLIGHT 10 s Fig. 1.13 ► SETTING рНi is the sub-menu command intended to select the needed value of the рНi 7.00; 6.70 or 4.00 isopotential points. On selection of this sub-menu command the display shown in Fig. 1.14 shall come up.
  • Page 20 ► AUTOBACKLIGHT is the sub-menu command intended to set illumination time of 10 s or 30 s once any of the keys is depressed. On selection of this sub-menu command the display shown in Fig. 1.16 shall come up. AUTOBACKLIGHT ►...
  • Page 21 CLEAR FOLDER SHARED FOLDER ►POINT 1 POINT 2 POINT 5 POINT 3 POINT 4 Fig. 1.18 The display shall show the name and content of the folder as shown, for instance, in Fig. 1.19. SHARED FOLDER - - - - - - - - - - - - - - - - - - - - - - - - - - 25 jan.
  • Page 22 3 MAKE FOLDER display is shown in Fig. 1.21. CREATE A FOLDER max 16 symb. _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ ABCDEFG 12345 HIJKLMNO ►P◄ 67890 QRS TUVWXYZ _ ( ) ./ Fig.
  • Page 23 If the key is depressed, the "CREATED FOLDER IS NOT SAVED" EXIT message shall appear for 2 s. The analyzer shall go over to the SCRATCHPAD EDITOR display. 4 DELETE FOLDER display is shown in Fig. 1.23. The folders are saved in the order they have been made. DELETE FOLDER POINT 1 POINT 2...
  • Page 24 Date and time shall be entered separately in any order: date, month, hours, and minutes. READ Moving to the left and to the right is carried out using the keys. In ◄ ► this case the parameter that may be changed starts flickering. DATE TIME 10:30 mar.
  • Page 25 The display shown in Fig. 1.27 comes up 24 sep. 13:56 when temperature exceeds 999.9 С (failure in the temperature measuring 12.508 channel). рН t > t max −−−.− °С Fig. 1.27 The display shown in Fig. 1.28 comes up 24 sep.
  • Page 26 The display shown in Fig. 1.30 comes up (error No 1) in the event of pH-meter program failure. Refer to 2.5 of the Operation Manual (Troubleshooting. ROM ERROR Table 2.1). DEFECT METER! Fig. 1.30 The display shown in Fig. 1.31 comes up (error No 2) in the event of pH-meter program failure.

  • Page 27: Measuring Instruments, Tools And Appliances

    The display shown in Fig. 1.34 (error No 5) comes up in the event of erroneous entry in the scratchpad. FOLDER NAME ERROR If YES command is selected, the entry is deleted without warning DELETE RECORD? apparatus comes back ► YES measurement mode.

  • Page 28: Intended Use

    2 INTENDED USE 2.1 Operating limitations 2.1.1 The pH-meter is used to measure hydrogen-ion activity index (from 0 to 12 pH), temperature of aqueous solutions (from 0 to plus 70 С), and U (from minus 1.000 to plus 1.000 mV). 2.1.2 When working with pH-meter, protect electrodes and convertor unit from shocks since fragile materials have been employed in their design.
  • 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 The pH-meter is to be calibrated at buffer solution temperature of (20±5) °C. In this case temperatures of the two calibration solutions shall not differ by more than 0.5 С. Prior to calibration the reference electrode or combined electrode filling hole is to be opened.
  • Page 31 4 If buffer solution pH value is not identified automatically, the display shown in Fig. 2.3 shall come up. Refer to 2.5 of the Operation Manual (Troubleshooting. Table 2.1). WARNING! CALIBRATION ERROR! Fig. 2.3 5 If buffer solution pH value is identified automatically, it shall appear and the meter in the left part of the screen shall be pasted.
  • Page 32 7 If calibration against the second buffer solution is not needed, press key. The pH-meter calibration to one point is completed. The EXIT display shown in Fig. 2.8 shall come up. The pH-meter shall go to step 13. 8 If calibration against the second buffer solution is required, remove electrodes and temperature sensor from the first buffer solution and wash them in distilled water (in two vessels in succession) and then in a volume of the second buffer solution.

  • Page 33: Measurement Procedure

    PROBE PARAMETERS S = 101 % Ei = -34 mV pHi = 7.00 Fig. 2.8 RECORD 13 Press the key. Calibration is completed and the display shown in ENTER Fig. 2.9 shall come up. SAVE? ►YES Fig. 2.9 RECORD 14 Move the cursor against YES and press the key.
  • Page 34 Usually in measurements using electrodes readings stabilize within maximum of 10 min. However, in some solutions at temperature close to 0 C readings may stabilize within 15 min. Storage between measurements is to meet requirements set out in the electrode (electrodes) certificates. To reduce electrolyte consumption in the electrode, the electrode filling hole is to be closed within idling periods.
  • Page 35 On completion of measurements wash electrodes and the protective case with distilled water and screw the base onto the case. In case of long breaks in measurements remove the electrode (electrodes) from the protective case and store them as described in their certificates. To reduce electrolyte consumption in the electrode, the electrode filling hole is to be closed within idling periods.

  • Page 36: Troubleshooting

    2.5 Troubleshooting 2.5.1 Probable causes and remedies are laid down in Table 2.1. Table 2.1 Trouble and symptoms Probable cause Remedy 1 pH-meter is not powered up or Poor contact with power Open the dry cell is de-energized once it is turned supply compartment and clean contacts of...
  • Page 37 2.5.2 Setting of predetermined parameters of electrode system pH calibration Setting of predetermined parameters of electrode system pH calibration is used for checking the transducer if pH-meter readings seem to be doubtful. To set predetermined parameters, proceed as follows:  turn off pH-meter; RECORD ...
  • Page 38 To check the transducer move to pH measurement mode and apply Е U to the transducer input, mV, according to the equation: Е = Е  (pH − pH where Е , pH are the coordinates of electrode system isopotential point given in the PROBE PARAMETERS menu according to Fig.

  • Page 39: Maintenance

    3 MAINTENANCE pH-meter scheduled maintenance 3.1.1 On-going inspection of the convertor unit, electrodes and connecting cables for damage. 3.1.2 Cleaning of dirty external surfaces of the convertor unit using soft detergents. 3.1.3 pH-meter calibration against buffer solutions according to 2.3.3. pH-meter calibration against buffer solutions is to be undertaken: ...

  • Page 40: Attachment A

    ATTACHMENT A (reference) pH of standard buffer solutions versus temperature Table A.1 Chemistry of buffer solutions 1.65 3.56 4.01 6.86 9.18 10.00 4.000 6.961 9.475 10.273 3.998 6.935 9.409 10.212 1.638 3.997 6.912 9.347 10.154 1.642 3.998 6.891 9.288 10.098 1.644 4.001 6.873...

  • Page 41: Attachment B

    ATTACHMENT B (reference) pH of highly dilute alkaline and acid solutions as a function of analyzable fluid temperature computed on the basis of the data from MU 34-70-114-85 1 0 ,0 0 9 ,0 0 8 ,0 0 Н р 7 ,0 0 6 ,0 0 Temperature...

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