ELMETRON CX-401 User Manual
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ELMETRON CX-401 User Manual

Waterproof multifunction meter
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Summary of Contents for ELMETRON CX-401

  • Page 1 WATERPROOF MULTIFUNCTION METER CX-401 USER‘S MANUAL...
  • Page 3 USER’S MANUAL WATERPROOF MULTIFUNCTION METER CX-401 Before use please read the instructions carefully!

  • Page 5: Table Of Contents

    CONTENTS Introduction 1.Exploitation notices 2.Characteristics of the meter 3.What is the meter designed for 4.The outside view 5.Switching the meter on and off 6.Preparation to work 6.1.Choosing the kind of the temperature compensation 6.2.Changing the measurement resolution 6.3.Switchnig the stabilised reading signalisation on and off 6.4.Changing the electrode number 6.5.Readout of the last calibration date 6.6.Setting the time of calibration validity...
  • Page 6 17.3. The salinity measurement with conversion to TDS 18. Notices about temperature compensation 18.1. Natural water 18.2. Ultra pure water 19. Simplified way of determining the α coefficient Oxygen concentration measurement 20. Basic information about oxygen measurement 21. Entering the oxygen measurement parameters 21.1.

  • Page 7: Introduction

    - 1 - I. INTRODUCTION...
  • Page 8 - 2 - User‘s manual for CX-401 multifunction meter v6.0x...

  • Page 9: Exploitation Notices

    - 3 - 1. EXPLOITATION NOTICES Dear User! We present you a device distinguished by accuracy according to the technical data and by a high stability of the displayed results. We believe that the measurements would not cause you any trouble and that the meter would operate without any inconvenience.

  • Page 10: Characteristics Of The Meter

    - 4 - 2. CHARACTERISTICS OF THE METER CX-401 multifunction meter belongs to the newest generation of measuring devices. It offers wide range of additional functions. The meter ensures high accuracy and repeatability of readings. Two kinds of power source: the rechargeable battery and the power adapter, enable work in field and long- lasting measurements in the laboratory.
  • Page 11 - 5 - - possibility to create the last calibration report or readout of last 10 calibration data of each measuring function in the data transmission software; - microUSB output for connecting with PC and charging the rechargeable batteries; - large LCD backlit display with brightness control; - real time clock with date;...

  • Page 12: What Is The Meter Designed For

    - 6 - 3. WHAT IS THE METER DESIGNED FOR CX-401 multifunction meter is a precise and easy-to-use meter designed for measurements of hydrogen ion concentration in pH units, redox potential (mV), conductivity of solutions in in S/cm, resistivity in Ωcm, concentration of oxygen dissolved in water in % or mg/l, oxygen saturation in air in % and atmospheric pressure measurement in hPa.

  • Page 13: The Outside View

    - 7 - 4. THE OUTSIDE VIEW On the front wall of the meter there is a LCD display (Pic. 1), on which depending on the chosen function following symbols are displayed: - result of the pH measurement in pH units; - result of the redox potential measurement in mV;...
  • Page 14 Chinch input for connecting the temperature probe; the BNC-50 input for connecting the oxygen sensor; USB - microUSB input for connecting the power adapter or with the PC; Cond - the BNC-50 input for the conductivity cell. User‘s manual for CX-401 multifunction meter v6.0x...
  • Page 15 - 9 - Pic. 2.

  • Page 16: Switching The Meter On And Off

    (description in the chapter 29.4). This function is deactivated during calibration, while collecting series of measurements and working with the power adapter. User‘s manual for CX-401 multifunction meter v6.0x...

  • Page 17: Preparation To Work

    - 11 - 6. PREPARATION TO WORK Before starting work: - connect prepared combination pH electrode or redox electrode to the pH (BNC-50) input; - connect oxygen sensor to the O2 (BNC-50) input; - connect conductivity cell to the Cond (BNC-50) input; - in case of using the temperature probe connect it to the t (Chinch) temperature input;...

  • Page 18: Changing The Measurement Resolution

    - 1% or 0.1mg/l resolution; - 0.1% or 0.01 mg/l. For the mV measurement: - 1 mV resolution; - 0.1 mV resolution. Return to the measuring mode by pressing the button. User‘s manual for CX-401 multifunction meter v6.0x...

  • Page 19: Switchnig The Stabilised Reading Signalisation On And Off

    - 13 - 6.3. Switchnig the stabilised reading signalisation on and off The meter may signalise that the reading has stabilised. To switch the signalisation on and off: - in the measuring mode press the button, the (display); - press the button shortly, the READY symbol will appear (Pic.

  • Page 20: Changing The Electrode Number

    Additionally the points in which the electrode has been calibrated are shown under its number. Pic. 6. - return to the measuring mode by pressing the button. Note: while changing the electrode remember about choosing the relevant electrode number in the meter. User‘s manual for CX-401 multifunction meter v6.0x...

  • Page 21: Readout Of The Last Calibration Date

    - 15 - 6.5. Readout of the last calibration date The meter remembers the dates of calibration of all electrodes, cells and sensors in every measuring function. Before starting work it is possible to check the date of the last calibration. In order to do so, in the measuring mode: - press the button until the electrode number displays in the upper row...

  • Page 22: Setting The Time Of Calibration Validity

    After choosing time of one day and pressing the button, instead of digital values the symbol appears what deactivates the calibration validity expiry controlling function. Pic. 8. Return to the measuring mode by pressing the button. User‘s manual for CX-401 multifunction meter v6.0x...

  • Page 23: Defining The Button Functions

    - 17 - 6.7. Defining the button functions button may function in three ways: 1. record single readings; 2. start collecting measurement series; 3. hold the reading on the display. To define the function: - in the measuring mode press and hold the button until the MEM symbol and the number of the last recored reading is displayed;...

  • Page 24: Holding The Reading On The Display

    HOLD symbol will be displayed (Pic. 10). To deactivate this function and return to the measuring mode, press any button. Pic. 10 Note: the HOLD function cannot be activated in the calibration mode. User‘s manual for CX-401 multifunction meter v6.0x...

  • Page 25: Ph Measurement

    - 19 - II. pH MEASUREMENT...
  • Page 26 - 20 - User‘s manual for CX-401 multifunction meter v6.0x...

  • Page 27: Preparation Of The Ph Electrode

    - 21 - 7. PREPARATION OF THE pH ELECTRODE The electrode should be prepared to work according to the producer’s instructions. If the instructions weren’t given please act accordingly to the following steps: - new electrode should be put into saturated KCl solution for about 5 hours; - before starting measurements, the protecting rings (if used in this kind of electrode) should be removed.

  • Page 28: Calibration

    CX-401 enables storing characteristics of 3 calibrated pH electrodes marked by different symbols ( ). This feature is especially useful when it is necessary to change the electrode quickly or replace a broken one.

  • Page 29: Calibration With Use Of Standard And Buffer Solutions

    5 points, additionally taking into consideration the solutions’ pH values given in points 1 and 5 in the table. In CX-401 the characteristics of the electrodes are approximated linearly between the calibration points. Entering the calibration mode irreparably erases the electrode’s characteristic stored under the chosen electrode...

  • Page 30: Entering The Buffers' Values Into The Meter's Memory

    - check or set the values of the next calibration points following the instructions given above; - having set all the needed values, enter the pH measuring mode by pressing the button. User‘s manual for CX-401 multifunction meter v6.0x...
  • Page 31 - 25 - Each of the calibration points has a different range for entering the pH buffers’ values. This limitation enables the meter to recognise the buffer solutions automatically. Table 1 contains the manufacturer’s settings of the values of pH buffer solutions used for calibration, which may be changed according to the ranges given in this table.

  • Page 32: Calibration In Buffer Solutions

    P symbol with the recognised buffer number appears (Pic. 12.); i. wait till the result stabilises on the display (in most cases the result slightly differs from the buffer’s value). Pic. 12. User‘s manual for CX-401 multifunction meter v6.0x...
  • Page 33 - 27 - When the value stabilises, press the button . The result will blink, what informs that the calibration value has been recorded in the meter‘s memory; simultaneously, the corrected readout equal to the buffer‘s value will be displayed in the upper row (Pic. 13.). If the reading is still different than the buffers value, wait until it stabilises and press the button again.

  • Page 34: Calibration With Use Of Nist Compliant Standard Solutions

    After each measurement rinse the electrode and the temperature probe with distilled water in another standard and dry them with a tissue paper as described in the point h. User‘s manual for CX-401 multifunction meter v6.0x...
  • Page 35 - 29 - Pic. 14. The meter calculates only the pH buffers values detected during calibration. The values entered earlier into the memory do not affect the calibration results. The range of the temperatures taken into consideration for automatic calculations is 0 ÷ 60 o C and should not be exceeded. Table 2 Type of standard solution Temp.

  • Page 36: Calibration With Manual Temperature Compensation

    Next, connect the pH electrode to the meter and act according to the description from the previous section. Note: pressing both buttons simultaneously sets temperature to 20 User‘s manual for CX-401 multifunction meter v6.0x...

  • Page 37: Checking The Electrode Condition

    - 31 - 9. CHECKING THE ELECTRODE CONDITION After pH electrode calibration the meter calculates its parameters: offset in pH units and slope defined also as efficiency in percents. The electrode offset may be defined in pH or mV units. An ideal electrode immersed in the 7.00 pH buffer before calibration should indicate 7.00 pH which equals 0.00 mV.

  • Page 38: Readout Of The Electrode Parameters After Calibration

    – day – year (below, Pic. 16A); press the button again, a symbol will be displayed in the lower row, the zero offset will be visible in the upper row of the display (Pic. 16B); Pic. 16 User‘s manual for CX-401 multifunction meter v6.0x...
  • Page 39 - 33 - - press the button once again, the lower row will display the symbol, and the upper row – the percentage of the electrode condition (Pic. 17); Pic. 17 The electrode‘s calibration points are displayed between the upper and the lower row.

  • Page 40: Ph Measurement

    Accurate laboratory measurements require using of magnetic stirrer. Note: exceeding the measuring range is signalised blinking digits on the display. Exceeding the automatic temperature compensation range is signalised with blinking digits and the symbol. User‘s manual for CX-401 multifunction meter v6.0x...
  • Page 41 - 35 - 10.2 Measurement with manual temperature compensation Disconnecting the temperature probe switches the meter to the manual temperature compensation mode (the symbol is displayed ). Measurement with manual temperature compensation is similar to the measurement with ATC, the difference is that the buffer’s temperature is measured with a laboratory thermometer and entered by the buttons.

  • Page 42: Notices About The Temperature Compensation And Interpretation Of The Ph Measurement Results

    11. NOTICES ABOUT THE TEMPERATURE COMPENSATION AND INTERPRETATION OF THE pH MEASUREMENT RESULTS CX-401 meter has a possibility of manual and automatic temperature compensation, what enables eliminating errors which result from affecting the electrode characteristics by the temperature changes. The pH meter is a mV meter which displays voltage counted to pH unit.
  • Page 43 - 37 - The accuracy of the meter totals to ±0.002 pH, ±1 digit, what practically means that difference between results of measurements made by 2 meters in the same standard may come to 0.005 pH. Such error is acceptable because one measurement will be made with -0.002 pH error and the second with +0.002 pH error.
  • Page 44 - 38 - User‘s manual for CX-401 multifunction meter v6.0x...

  • Page 45: Conductivity And Salinity Measurement

    - 39 - III. CONDUCTIVITY AND SALINITY MEASUREMENT...
  • Page 46 - 40 - User‘s manual for CX-401 multifunction meter v6.0x...

  • Page 47: Basic Information About The Conductivity Measurement

    12. BASIC INFORMATION ABOUT THE CONDUCTIVITY MEASUREMENT The conductivity measurement is based on applying electric current with a proper voltage and frequency to the measured solution. In CX-401 the voltage comes to several dozens of mV and the frequency depends on the measuring range and may vary from 100 Hz up to 10 kHz.

  • Page 48: Entering The Conductivity Measurement Parameters

    (unit) symbol displays in the lower row on the LCD; - with the buttons choose in the lower row on the LCD: - measurement in conductivity units (Pic. 19.); Pic. 19. - measurement in resistivity units (Pic. 20); Pic. 20 User‘s manual for CX-401 multifunction meter v6.0x...
  • Page 49 - 43 - NaCl result counted to NaCl in g/l (Pic. 21); Pic. 21. KCl - result counted to KCl in g/l (Pic. 22); Pic. 22. TDS- result counted to TDS in g/l (Pic. 23). Pic. 23.

  • Page 50: Entering The W

    TDS coefficient; - enter the measuring mode by pressing the button Pic. 24. The way of determining the W coefficient is described in the section 17.2. User‘s manual for CX-401 multifunction meter v6.0x...

  • Page 51: Choosing The Type Of The Temperature Compensation

    - 45 - 13.3. Choosing the type of the temperature compensation In case of measurements in unit, depending on the type of measured solutions, it is possible to choose the most suitable way of compensating the conductivity changes in the temperature measurement function.

  • Page 52: Entering The Α Coefficient Value

    - return to the measuring mode by pressing the button. Pic. 26. The result will be calculated with use of the introduced α temperature coefficient. Simplified way of determining the α coefficient is described in the section 19. User‘s manual for CX-401 multifunction meter v6.0x...

  • Page 53: Entering The Reference Temperature Value

    - 47 - 13.5. Entering the reference temperature value When the measurement is made in unit and the (compenstion) has been chosen, the reference temperature value may be entered. The range is 10.0 ÷ 40.0 C with possibility of setting every 0.1 The most frequent value is 25 To enter the reference temperature: - in the coductivity measuring mode press the...

  • Page 54: Maintenance Of The Conductivity Cell

    – washing up liquid mixture, what lowers the surface tension and disables air bubbles to stick to the surface of the cell walls or electrodes. Next, wash the cell accurately with distilled water. User‘s manual for CX-401 multifunction meter v6.0x...

  • Page 55: Calibration

    The meter has a possibility of calibration without use of standard solution. In case of such calibration it is necessary to know the K constant of the conductivity cell. This value may be given by the manufacturer of the cell or may be determined using CX-401 meter after calibration in standard solution.

  • Page 56: Calibration With Use Of Standard Solutions

    3. New, unused standard solution should be applied. 4. The cell and its electrodes should be clean and devoid of bubble of air. 5. The cell should be placed in an electrode holder. User‘s manual for CX-401 multifunction meter v6.0x...
  • Page 57 - 51 - 15.2.1. Entering the standard solution values In order to enter the values of the standard solutions: - choose the unit according to the section 13.1; - in the conductivity measuring mode press the button till the symbol appears in the lower row on the LCD (Pic. 29); - with the button, choose the point P1 ..
  • Page 58 In order to facilitate moistening of the electrodes, it is recommended to immerse the cell in distilled water with washing-up liquid, and then wash it in distilled water. User‘s manual for CX-401 multifunction meter v6.0x...
  • Page 59 - 53 - 15.2.3. Calibration with manual temperature compensation It is necessary to: - turn the meter on with the button; - choose the conductivity measuring mode (section 13.1); - disconnect the temperature probe and press the buttons simultaneously. In the lower line of LCD an introduced reference temperature value will appear (section 13.5);...
  • Page 60 K constant value (at the bottom of the LCD) for all the calibration points (Pic. 32B); - return to the cell number choosing mode pressing the button or enter the measuring mode by pressing the button. Pic. 32 User‘s manual for CX-401 multifunction meter v6.0x...

  • Page 61: Conductivity Measurement

    - 55 - 16. CONDUCTIVITY MEASUREMENT 16.1. Measurement without the temperature compensation accurate conductivity measurement should made without the temperature compensation. The measured solution should be adjusted to the reference temperature value introduced earlier, using the temperature measuring function in the meter. In case of working without the temperature probe it is necessary to introduce the temperature value with the buttons.

  • Page 62: Measurement With Automatic Temperature Compensation

    - air bubbles may be removed by moving the immersed cell. In order to facilitate moistening of the electrodes, it is recommended to immerse the cell in distilled water with washing-up liquid, and then wash it in distilled water. User‘s manual for CX-401 multifunction meter v6.0x...

  • Page 63: Measurement With Manual Temperature Compensation

    - 57 - 16.3. Measurement with manual temperature compensation Measurement with manual temperature compensation may be made in stable work conditions, e.g., during measurements in laboratory, especially with use of thermostat, or in case of the temperature probe damage. Disconnecting of the temperature probe switches the meter to manual temperature compensation.

  • Page 64: Salinity And Total Dissolved Solids Measurement

    18.174 15.000 17.46 In CX-401 microcontroller bases calculations on actual dependence between conductivity and salinity what greatly reduces the error. There is a possibility of counting the salinity in NaCl or KCl, because the dependence for these two salts is slightly different.

  • Page 65: Salinity Measurement With Conversion To Nacl Or Kcl

    - 59 - The results are more accurate for homogeneous solutions (NaCl, KCl). Concentration of salts mixture with unknown composition in most cases is counted to NaCl. The usefulness of water for home or industry is usually checked by determining TDS. In order to use the conductivity readout for determining the TDS it is necessary to specify the W coefficient, which enables automatic conversion after having introduced it to the meter’s...

  • Page 66: Determining The W

    13.2; - choose the salinity measurement with conversion to TDS and the displayed unit (g/l or %); - than act as during conductivity measurement. - after stabilisation check the reading. User‘s manual for CX-401 multifunction meter v6.0x...

  • Page 67: Notices About Temperature Compensation

    - 61 - 18. NOTICES ABOUT TEMPERATURE COMPENSATION 18.1. Natural water The meter enables reduction of the temperature compensation error in case measurements natural water with conductivity range 60 µS/cm ÷ 1 mS/cm. Natural water is the surface water and the ground water.
  • Page 68 The cell has to be accuratelly rinsed, especially before first measurements. It may last even 24h to rinse the cell with flowing ultra pure water until the cell is clean. User‘s manual for CX-401 multifunction meter v6.0x...

  • Page 69: Simplified Way Of Determining The Α Coefficient

    - 63 - 19. SIMPLIFIED WAY OF DETERMINING THE α α α α COEFFICIENT The knowledge of α coefficient has a crucial significance during measurements in temperatures different than the reference temperature. This coefficient is changing together with the temperature and concentration. Table 4 contains values of α...
  • Page 70 25° C the formula α α α α = x 100 (%/ (25 - T where: - value of the changed temperature in - conductivity measured in 25 - conductivity measured in temperature T User‘s manual for CX-401 multifunction meter v6.0x...

  • Page 71: Oxygen Concentration Measurement

    - 65 - IV. OXYGEN CONCENTRATION MEASUREMENT...
  • Page 72 - 66 - User‘s manual for CX-401 multifunction meter v6.0x...

  • Page 73: Basic Information About Oxygen Measurement

    - 67 - 20. BASIC INFORMATION ABOUT OXYGEN MEASUREMENT Measurement of dissolved oxygen in water solutions is performed with use of the oxygen sensor. The basic element of the sensor is a teflon semi- permeable membrane, which enables penetration of oxygen contained in the measured solution, into the electrolyte –...
  • Page 74 Even the best oxygen sensors have so-called drift about ±1%/24 h. Wide measuring range in CX-401 multifunction meter enables making measurements in water permeated with oxygen, i.e.

  • Page 75: Entering The Oxygen Measurement Parameters

    - 69 - 21. ENTERING THE OXYGEN MEASUREMENT PARAMETERS 21.1. Changing the unit The measurement result can be displayed in % of the oxygen saturation or in mg/l. In case of measurements of ocygen saturation in air the reading can be displayed only in %.

  • Page 76: The Salinity Influence Compensation

    (error) symbol and next the previous value of salinity is displayed it informs that during the conductivity measurement the unit has not been changed for g/l of NaCl; - return to the measuring mode by pressing the button. User‘s manual for CX-401 multifunction meter v6.0x...
  • Page 77 - 71 - 21.2.2. Manual introduction of the salinity value The salinity value can be determined on the basis of known conductivity of the measured solution. Table 6 shows the real dependence between salinity and conductivity counted in NaCl. In order to enter the salinity value: - measure conductivity of the solution with any conductivity meter and read the salinity value from the table;...
  • Page 78 13.61 31.11 48.58 14.26 31.76 49.22 14.91 32.40 49.87 15.56 33.05 50.63 16.22 33.70 Table 6. Determining the salinity in g/l NaCl on the basis of conductivity in mS/cm (at 25 o C). User‘s manual for CX-401 multifunction meter v6.0x...

  • Page 79: Automatic Compensation Of The Atmospheric Pressure Influence

    - 73 - 21.3. Automatic compensation of the atmospheric pressure influence The concentration of oxygen dissolved in water determined in mg/l depends directly on the atmospheric pressure value, which means that 10% pressure change causes also 10% oxygen saturation change. The meter enables automatic compensation with use of build-in atmospheric pressure sensor.

  • Page 80: Calibration Of The Oxygen Sensor

    Usually, 1-point calibration in air is sufficient, as the zero point of the meter is at its resolution level. Entering the calibration mode under the chosen sensor number erases the characteristic stored in the memory under this number User‘s manual for CX-401 multifunction meter v6.0x...
  • Page 81 - 75 - To calibrate: place the sensor in the vessel with 0% saturation solution (saturated sodium sulphite solution); press and hold the button till the moment of appearing the CAL symbol in the bottom left corner of the display, the meter will enter the calibration mode and automatically change the unit to % (if it was previously set to measurement in mg/l O when the reading stabilises, press the...

  • Page 82: Readout Of The Sensor Parameters After Calibration

    P2 point will be visible in the upper row of the display (Pic. 41B); Pic. 41 Return to the electrode number readout by pressing the button, and to the measuring mode by pressing the button. User‘s manual for CX-401 multifunction meter v6.0x...

  • Page 83: Measurement Of Dissolved Oxygen Concentration In Water

    - 77 - 23. MEASUREMENT OF DISSOLVED OXYGEN CONCENTRATION IN WATER Before starting the oxygen concentration measurement the meter should be prepared for work (chapter 6) and the oxygen sensor calibrated (chapter 22). The measurement in % of saturation does not require additional measurements of the temperature, salinity or atmospheric pressure.

  • Page 84: Measurement With Automatic Temperature Compensation

    Uwaga: in case of measurements in solutions with low salinity, check according to the section 21.2 if the introduced salinity value is equal 0.00 g/l. User‘s manual for CX-401 multifunction meter v6.0x...

  • Page 85: Measurement Of Oxygen Saturation In Air

    - 79 - 24. MEASUREMENT OF OXYGEN SATURATION IN AIR Before starting the oxygen saturation measurement, the meter should be prepared for work (chapter 6) and the oxygen sensor calibrated (chapter 22). oxygen saturation measurement does require additional measurements of temperature, salinity and atmospheric pressure. In order to make measurement: - connect the oxygen sensor to the O2 connector (Pic.
  • Page 86 - 80 - User‘s manual for CX-401 multifunction meter v6.0x...

  • Page 87: Atmospheric Pressure Measurement

    - 81 - V. ATMOSPHERIC PRESSURE MEASUREMENT...
  • Page 88 - 82 - User‘s manual for CX-401 multifunction meter v6.0x...

  • Page 89: Atmospheric Pressure Measurement

    - 83 - 25. ATMOSPHERIC PRESSURE MEASUREMENT The meter enables atmospheric pressure measurement. In order to read its value: - turn the meter on by pressing the button; - with the button choose the oxygen measuring mode (O - press the button until the (pressure) symbol dispalys in the lower row of the LCD;...
  • Page 90 - 84 - User‘s manual for CX-401 multifunction meter v6.0x...

  • Page 91: Redox Potential And Temperature Measurement

    - 85 - VI. REDOX POTENTIAL AND TEMPERATURE MEASUREMENT...
  • Page 92 - 86 - User‘s manual for CX-401 multifunction meter v6.0x...

  • Page 93: Entering The Potential Offset Parameters

    - 87 - 26. ENTERING THE POTENTIAL MEASUREMENT PARAMETERS Before starting measurement choose the mode of measurement and, if necessary, enter the potential offset value. 26.1. Choosing the mode of measurement The meter may display an absolute or relative potential reading. To choose the required mode of measurement: - in the redox potential measuring mode press the button until the...

  • Page 94: Entering The Reference Potential Value

    Pic. 45. If the relative measurement has not been chosen (section 26.1), the reference potential screen will not appear. Note: pressing the buttons simultaneously sets the reference potential value to 0.0 mV. User‘s manual for CX-401 multifunction meter v6.0x...

  • Page 95: Redox Potential Measurement

    - 89 - 27. REDOX POTENTIAL MEASUREMENT CX-401 multifunction meter is an accurate redox potential meter. The measurement can be made with a special redox electrode or during titration. The reading may be checked after choosing the mV mode with the button.
  • Page 96 - 90 - User‘s manual for CX-401 multifunction meter v6.0x...

  • Page 97: Other

    - 91 - VII. OTHER...
  • Page 98 - 92 - User‘s manual for CX-401 multifunction meter v6.0x...

  • Page 99: Clock With Date

    - 93 - 29. CLOCK WITH DATE After choosing the time mode with the button the meter will display the current time. Pressing of the button displays interchangeably: date, automatic switch off time, sound settings, backlight mode, software version number, serial number, date of production and date of manufacturer‘s calibration.

  • Page 100: Auto Switch Off Function

    The auto switch off function is active only in case of working on the rechargeable battery. This function is deactivated during calibration, collecting series of measurements and in case of working with the USB power adapter. User‘s manual for CX-401 multifunction meter v6.0x...

  • Page 101: Switching The Sound On And Off

    - 95 - 29.5. Switching the sound on and off The meter may signalise pressing each button and the stabilised reading with a sound. This function may be also deactivated by the user. To do so: - in the time function press the button until the symbol appears in the upper row (Rys.

  • Page 102: The Brightness Control

    10 ÷ 100%, with every 10%. Pic. 51 With the buttons choose the backlight mode. Return to the time mode after pressing the button. User‘s manual for CX-401 multifunction meter v6.0x...

  • Page 103: Readout Of The Software Version Number, Date Of Production And Date Of Manufacturer's Calibration

    - 97 - 29.8. Readout of the software version number, date of production and date of manufacturer‘s calibration In the time function press the button till there is a screen displayed, as in the picture below (Pic. 52). The upper row displays the software version number and the lower row shows the kind of internal power source to which the meter is prepared: - powered by two rechargeable R6/AA batteries;...

  • Page 104: Storing And Readout Of The Results

    - pressing the button starts collecting the measuring series; - pressing the button in the measuring mode holds the reading until any button will be pressed; User‘s manual for CX-401 multifunction meter v6.0x...
  • Page 105 - 99 - - the interval between measurements when collecting series (Pic. 55). Pic. 55 symbol is displayed in the upper row and the time in the lower row. With the buttons set the time in minutes and seconds. The shortest time is 1 second, the longest - 60 minutes. Holding the button increases the change rate (repetition).

  • Page 106: Recording Single Readings

    Collecting series may be stopped by pressing the or the button or by filling up the memory. If the series is not filling the memory totally, collecting the next series may be started until the end of the memory capacity. User‘s manual for CX-401 multifunction meter v6.0x...

  • Page 107: Reviewing The Readings

    - 101 - 30.4. Reviewing the readings Reviewing stored readings is started in the measuring mode by pressing and holding the button until the number of the last stored result displays on turns with its value. Every press of the button shows the next or the previous number and the result with time and date depending on which parameter of function has been chosen (description point 30.1.c).

  • Page 108: Calibration Report

    In option “Collect” we mark the data we want to be sent. The transfer is started by pressing the button “Download”. User‘s manual for CX-401 multifunction meter v6.0x...
  • Page 109 - 103 - - "Download calibration data" only for the meters equipped with the calibration data memory (GLP). Choose measuring function in the meter to collect its report. In case of multifunction meters of the 460, 600 and 700 series it will be the main function. In this option choose: "Factory data"...

  • Page 110: Power, Replacing The Rechargeable Battery

    Next, do the screws till the moment of resistance (not too hard). Leaving the wall improperly screwed may cause the meter’s inundation, which is not repaired under the warranty conditions. User‘s manual for CX-401 multifunction meter v6.0x...

  • Page 111: Technical Data

    - 105 - 34. TECHNICAL DATA pH MEASUREMENT: accuracy range resolution (±1 digit) -2.000 ÷ 16.000 pH ±0.002 pH 0.001 / 0.01 pH >10 12 Ω Input impedance: Temperature compensation: manual/automatic Compensation range: -5.0 ÷ 110.0 pH electrode calibration: automatic, in 1 ÷...
  • Page 112 0.0 ÷ 40.0 Salinity compensation range: 0.0 ÷ 50.0 g/l Pressure compensation range: 800 ÷ 1100 hPa Sensor calibration: two-point in 0% and 100% O or one-point in 100%O Oxygen sensor: membrane, galvanic User‘s manual for CX-401 multifunction meter v6.0x...
  • Page 113 - 107 - MEASUREMENT OF OXYGEN SATURATION IN AIR: range resolution accuracy sensor‘s* ±1 cyfra 0 ÷ 100.0 % 0.1 % - accuracy of the sensor given in the chapter "Calibration of the oxygen sensor“. Sensor calibration: two-point in 0% and 20.9% O or one-point in 20.9%O Oxygen sensor:...

  • Page 114: Equipment

    2. Conductivity cell. 3. Oxygen sensor. 4. Adapter for connecting measuring and reference electrode in place of the combination electrode. 5. Pt1000A temperature probe of higher accuracy. 6. Ion selective electrodes. 7. Redox potential electrodes. User‘s manual for CX-401 multifunction meter v6.0x...
  • Page 115 W A R R A N T Y The “ELMETRON” company provides 24 months of warranty for CX-401 multifunction meter serial no........In case of breakdown the manufacturer will repair the device within 14 days from the delivery date. The warranty does not cover breakdown caused by...
  • Page 120  Sp. j. 41-814 Zabrze - Grzybowice ul. Witosa 10 tel. +48 32 / 2738106 fax +48 32 / 2738114 www.elmetron.com.pl e-mail: info@elmetron.com.pl...

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