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User‘s manual for CX-401 multifunction meter

v6.0x

29.4. Auto switch off function

In order to choose the screen of setting the auto switch off function, the time

mode press the

button until the

(Auto OFF) symbol displays (Pic.

48). The lower row displays the time of switching off in minutes (the time is
counted from the last press of any button). The value is changed with

,

buttons. If after choosing 1 minute the button

is pressed,

instead of numbers the

symbol displays. The auto off function is

deactivated. Return to the time mode after pressing the

button.

Pic. 48.

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.

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Содержание CX-401

Страница 1: ...WATERPROOF MULTIFUNCTION METER CX 401 USER S MANUAL...

Страница 2: ......

Страница 3: ...USER S MANUAL WATERPROOF MULTIFUNCTION METER CX 401 Before use please read the instructions carefully...

Страница 4: ......

Страница 5: ...ensation 30 9 Checking the electrode condition 31 9 1 Readout of the electrode parameters after calibration 32 10 pH measurement 34 11 Notices about the temperature compensation and interpretation of...

Страница 6: ...ure measurement 81 25 Atmospheric pressure measurement 83 VI Redox potential and temperature measurement 85 26 Entering the potential offset parameters 87 26 1 Choosing the mode of measurement 87 26 2...

Страница 7: ...1 I INTRODUCTION...

Страница 8: ...2 User s manual for CX 401 multifunction meter v6 0x...

Страница 9: ...it is necessary to choose a proper kind of electrode for solutions which are going to be measured e g sewage liquids with deposits meat cheese etc Therefore if you observe improper operation of the d...

Страница 10: ...ption of automatic introduction of temperature influence on the value of pH buffer solutions NIST norm information about the pH electrode condition storing of the date and calibration characteristics...

Страница 11: ...ibration 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 cont...

Страница 12: ...nted to NaCl KCl or TDS Waterproof housing enables work in difficult weather conditions or in humid environment CX 401 is used in food chemical pharmaceutical and power industries in water treatment s...

Страница 13: ...ssible Pic 1 Next to the temperature value the symbol for automatic temperature compensation or the symbol for manual compensation is displayed The CAL symbol on the left informs that the meter is in...

Страница 14: ...g shortly in this mode confirms the calibration result pressing shortly holds the reading on the display records the reading or starts the measuring series pressing and holding this button enters revi...

Страница 15: ...9 Pic 2...

Страница 16: ...n parameters of electrodes or cells have been lost After pressing the meter adopts standard characteristics offset 0 pH slope 100 for the pH electrode K constant 1 000 cm 1 for the conductivity cell o...

Страница 17: ...m the conductivity cell therefore during the pH and the conductivity measurements both electrode and cell may be immersed in the same solution simultaneously 6 1 Choosing the kind of the temperature c...

Страница 18: ...on the display symbol will appear Pic 4 with the buttons choose low resolution high resolution Pic 4 For the pH measurement 0 01 pH resolution 0 001 pH resolution For the conductivity measurement 3 di...

Страница 19: ...ear Pic 5 the signalisation is switched on After pressing the button once again the READY symbol disappears and switches the signalisation off Pic 5 After switching the signalisation on each reading s...

Страница 20: ...ch the calibration data will be stored Pic 6 Below the electrode number one of the following symbols will be displayed under this number there is no characteristic stored and the factory values are pr...

Страница 21: ...st calibration will be displayed in the following format month day and the year will be displayed below Pic 7 On the left side of the display the electrode number is shown Blinking date informs about...

Страница 22: ...ectrode is necessary To enter the time validity of the calibration in the measuring mode press the until the timeout Pic 8 symbol displays in the upper row of the display The number of days to the nex...

Страница 23: ...n the symbol will appear and below the last set parameter will be displayed Pic 9 With the buttons choose each time the button will be pressed the current measurement readout will be recorded pressing...

Страница 24: ...ctivating the HOLD function the button function has to be defined according to the previous subchapter Pressing the button will hold the reading on the display Below the reading the HOLD symbol will b...

Страница 25: ...19 II pH MEASUREMENT...

Страница 26: ...20 User s manual for CX 401 multifunction meter v6 0x...

Страница 27: ...by gentle touching the glass with a tissue paper after work the electrode should be stored in the saturated KCl solution The protecting rings should be put on the junction and upper hole in case of l...

Страница 28: ...bration validity expiry date In case of using this option calibration should be performed when the symbol of the electrode in use or is blinking For accurate calibration enter the pH values of the app...

Страница 29: ...bration mode irreparably erases the electrode s characteristic stored under the chosen electrode number There is no possibility to perform calibration only in one point without changing the rest of th...

Страница 30: ...on displays at the upper row and using the buttons choose symbol at the lower row calibration in buffers press the button At the lower row symbol the first buffer solution displays and at the upper ro...

Страница 31: ...100 2 4 000 3 900 4 100 3 7 000 6 800 7 100 4 9 000 8 900 10 200 5 12 000 11 800 14 000 The meter recognises only the pH buffers values detected during calibration The pH values stored in unused calib...

Страница 32: ...hoose the option from the lower row d return to the measuring mode pressing the button e connect the combination pH electrode prepared earlier and the temperature probe to the pH and t connectors resp...

Страница 33: ...en The meter calculates only the pH buffers values detected during calibration The values entered earlier into the memory do not affect the results After finishing calibration in the first buffer rins...

Страница 34: ...the button until the symbol is displayed in the upper row and with the buttons choose the calibration in standards option in the lower row Pic 14 d return to the measuring mode pressing the button e...

Страница 35: ...mp 0 C 1 oxalate 2 phthalate 3 phosphate 4 di sodium tetraborate 5 calcium hydroxide 0 1 666 4 000 6 984 9 464 13 423 5 1 668 3 998 6 951 9 395 13 207 10 1 670 3 997 6 923 9 332 13 003 15 1 672 3 998...

Страница 36: ...olution value to the meter s memory When the electrode is calibrated it is possible to calibrate two another electrodes choosing the remaining electrode numbers After choosing the electrode number ent...

Страница 37: ...converting the reading in pH At 20 0 C each pH unit corresponds to 58 168 mV If the electrode has 0 2 pH offset multiply it by 58 168 mV to obtain the electrode potential value in mV SEM Standard Erro...

Страница 38: ...heck press the button until the electrode number shows at the upper part of the display or symbol with the buttons choose the number of the electrode that is to be checked and press the button shortly...

Страница 39: ...and escaping it without performing calibration at any point the meter takes into consideration an ideal electrode s characteristics and its actual parameters are unknown In such case in the electrode...

Страница 40: ...result In case of measurement with automatic temperature compensation turn the meter on by pressing the button using the button choose the pH measurement function join the temperature probe and the c...

Страница 41: ...is used or when the temperature probe was damaged In case of measurement with manual temperature compensation turn the meter on by pressing the button using the button choose the pH measurement functi...

Страница 42: ...he temperature change Changes of the pH values with the temperature in the majority of solutions are rather slight however in e g pure water they tend to be significant Comparing values of solutions t...

Страница 43: ...t cases results from clogged junction broken electrode or contaminated membrane It happens frequently as a result of irrelevant kind of electrode chosen for the kind of measured solution Storing the e...

Страница 44: ...38 User s manual for CX 401 multifunction meter v6 0x...

Страница 45: ...39 III CONDUCTIVITY AND SALINITY MEASUREMENT...

Страница 46: ...40 User s manual for CX 401 multifunction meter v6 0x...

Страница 47: ...onductivity changes along with temperature and salts concentration In order to enable comparison of the results the measured value is counted by the meter to the value which corresponds to measurement...

Страница 48: ...measurement are going to be made 13 1 Choosing the unit The result of the measurement is displayed in units of conductivity or salinity Salinity can be counted to NaCl KCl or TDS content The result c...

Страница 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...

Страница 50: ...ependence 1 of weight concentration C 10 000 ppm 10 ppt Resolution of measurement in of weight concentration is 0 001 or 10 ppm 13 2 Entering the WTDS coefficient In case of measurement of salinity wi...

Страница 51: ...display the WATER symbol will be displayed non linear compensation for ultra pure water on the right side of the display the PURE WATER symbol will be displayed non linear compensation for ultra pure...

Страница 52: ...emperature coefficient 2 oC In case of higher accuracy requirements it is necessary to determine the kind of measured solution and adjust the value of the coefficient To introduce the coefficient in t...

Страница 53: ...ue is 25 0 C To enter the reference temperature in the coductivity measuring mode press the button until the reference temperature value displays Pic 27 The reference temperature symbol will appear wi...

Страница 54: ...of measurements in distilled water Maintenance of the cell consists in accurate rinsing the measuring cell with distilled water In case of fat content in the measured liquids it is possible to clean...

Страница 55: ...he most reliable In case of the user s calibration it is necessary to apply fresh accurately prepared standard solution accurately thermostatic at 250 C When these conditions are not kept the calibrat...

Страница 56: ...the K constant of the cell The meter enables 5 point calibration in standard solutions of freely chosen value In case of 1 point calibration it is advisable to use a standard of value close to the an...

Страница 57: ...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 P5 of which value is to be entered with the buttons enter t...

Страница 58: ...ppears on the display Pic 30 with the button choose the calibration point corresponding to the standard solution value the point number P1 P5 and the value entered for this point will apear for a mome...

Страница 59: ...ce should be evenly moistened measure the temperature of the standard solution with a laboratory thermometer and adjust it to the set reference temperature press and hold the button until the CAL symb...

Страница 60: ...ed Between the upper and the lower line the points are shown in which the cell was calibrated If the K constant value appears below the cell number it informs that it has been entered manually without...

Страница 61: ...ductivity measuring mode and the unit section 13 1 if the conductivity cell was not calibrated calibrate it according to the chapter 15 immerse the conductivity cell and the temperature probe in the s...

Страница 62: ...in the standard solution and hold the conductivity cell at least 1 cm away from the bottom and walls of the vessel The measuring cell should be filled up with the standard solution and should not inc...

Страница 63: ...ng to the chapter 15 check or change the value of the reference temperature and the coefficient immerse the conductivity cell in the standard solution and hold it at least 1 cm away from the bottom an...

Страница 64: ...s coefficient and the result of salinity is received in g l e g if the conductivity value is 2 mS cm the salinity is 1g l In practice the dependence between conductivity and salinity is not linear and...

Страница 65: ...e drying it to constant weight in temperature 103 1050 C weighting and counting in volume ratio mg dm3 The received weight is lower than total dry mass in water because apart from the dissolved solids...

Страница 66: ...olved Solids in g l conductivity of the sample in mS cm Note the TDS value should be counted to volume of sample equal to 1l 2 If the reading is to be displayed in of weight concentration WTDS TDS whe...

Страница 67: ...easurements in ultra pure water with conductivity up to 10 S cm proceeded with temperature compensation the measurement accuracy has been improved with use of a special function in the meter which ena...

Страница 68: ...water is not ideally clear but we do not know the type of contamination the best solution is to choose compensation for contamination with neutral salts PURE WATER Ultra pure water is a strong solvent...

Страница 69: ...KCl 10 1 88 H2SO4 50 1 93 NaCl 10 2 14 HF 1 5 7 20 HNO3 31 1 39 Table 5 contains rough values of coefficient for KCl and NaCl depending on the temperature and concentration of the measured liquid Tab...

Страница 70: ...the solution again This value will be different than in TR temperature GTx 6 Determine the coefficient using the following formula GTR GTX GTR TR TX x 100 0 C where TR reference temperature in 0 C Tx...

Страница 71: ...65 IV OXYGEN CONCENTRATION MEASUREMENT...

Страница 72: ...66 User s manual for CX 401 multifunction meter v6 0x...

Страница 73: ...intaining activities of the sensor from the user s side It is worth remembering that during measurement the sensor absorbs oxygen from the environment of the membrane The sensor s manufacturers recomm...

Страница 74: ...ssembled Depending on thickness of the membrane awaiting time for a stable result is about 1 1 5 min Accuracy of the measurement is connected with the temperature of calibration and measurement The gr...

Страница 75: ...e displayed only in To choose the unit in the oxygen measuring mode press the button until the unit symbol displays in the upper row of the LCD with the buttons choose O2 measurement of oxygen concent...

Страница 76: ...In order to do it enter the conductivity measuring function by pressing the button measure salinity of the solution in g l unit with conversion to NaCl accurate description in the section 17 1 after s...

Страница 77: ...lution with any conductivity meter and read the salinity value from the table in the oxygen measuring mode press and hold the button until the salinity symbol displays in the lower row of the LCD Pic...

Страница 78: ...11 6 00 38 23 35 65 40 81 12 6 61 39 23 99 66 41 46 13 7 21 40 24 64 67 42 11 14 7 83 41 25 29 68 42 75 15 8 45 42 25 93 69 43 40 16 9 07 43 26 58 70 44 05 17 9 70 44 27 23 71 44 70 18 10 35 45 27 87...

Страница 79: ...ith use of build in atmospheric pressure sensor This influence is automatically counted during measurements in mg l There is a possibility of reading the atmospheric pressure value in the oxygen measu...

Страница 80: ...rature of the tested solutions If it is impossible to calibrate the device the membrane of the sensor should be replaced according to the manufacturer s instruction This situation usually takes place...

Страница 81: ...rinse it accurately with distilled water and leave it in the air when the reading stabilises press the button The reading will blink what will inform about recording the calibration value at the same...

Страница 82: ...of the electrode that is to be checked and press the button shortly The last calibration date will be displayed in the following format month day year below Pic 41A Between the upper and the lower ro...

Страница 83: ...ighest accuracy can be achieved by calibrating the sensor at the same temperature at which the measurement will be carried out The measurement error increases together with the difference between the...

Страница 84: ...to make measurement with manual temperature compensation disconnect the temperature probe switch the meter on with the button choose the measuring function with the button choose the unit according to...

Страница 85: ...ration measurement does not require additional measurements of temperature salinity and atmospheric pressure In order to make measurement connect the oxygen sensor to the O2 connector Pic 2 leave the...

Страница 86: ...80 User s manual for CX 401 multifunction meter v6 0x...

Страница 87: ...81 V ATMOSPHERIC PRESSURE MEASUREMENT...

Страница 88: ...82 User s manual for CX 401 multifunction meter v6 0x...

Страница 89: ...value turn the meter on by pressing the button with the button choose the oxygen measuring mode O2 press the button until the pressure symbol dispalys in the lower row of the LCD in the upper row the...

Страница 90: ...84 User s manual for CX 401 multifunction meter v6 0x...

Страница 91: ...85 VI REDOX POTENTIAL AND TEMPERATURE MEASUREMENT...

Страница 92: ...86 User s manual for CX 401 multifunction meter v6 0x...

Страница 93: ...e the required mode of measurement in the redox potential measuring mode press the button until the relative symbol will be displayed in the upper row with the buttons choose in the lower row the rela...

Страница 94: ...pper row the reference potential symbol will be displayed Pic 45 with the buttons enter the reference potential value or press the button the meter will substitute the value which was measured at the...

Страница 95: ...the button connect the temperature probe to the Chinch connector the symbol will be displayed put the temperature probe to the measured solution wait till the value in the lower row stabilises and ch...

Страница 96: ...90 User s manual for CX 401 multifunction meter v6 0x...

Страница 97: ...91 VII OTHER...

Страница 98: ...92 User s manual for CX 401 multifunction meter v6 0x...

Страница 99: ...one displays seconds The way of setting time is displayed below 29 2 Date The date is displayed in the Month Day Year system Pic 47 In the upper row current month and day are displayed and in the lowe...

Страница 100: ...e time is counted from the last press of any button The value is changed with buttons If after choosing 1 minute the button is pressed instead of numbers the symbol displays The auto off function is d...

Страница 101: ...ignalisation off button sound signalisation on READY button and stabilised reading sound signalisation on Rys 49 Return to the time mode by pressing the button 29 6 The LCD backlight mode In the time...

Страница 102: ...to 50 makes the work time on one set of batteries two times longer with brightness which is sufficient for work While choosing the backlight mode section 29 6 it is possible to control brightness only...

Страница 103: ...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 powered by two...

Страница 104: ...ery measuring function by pressing and holding the button until the number of the most recently recorded readings shows This number is displayed on turns with the stored reading Before recording choos...

Страница 105: ...inutes Holding the button increases the change rate repetition In case of setting the parameter to or the position does not appear c the way of displaying the stored readings successively number of th...

Страница 106: ...played it informs that the maximal number of readings has been reached 30 3 Collecting measuring series There is a possibility to store series of measurements in the meter s memory It is necessary to...

Страница 107: ...highest or lowest number The reviewing mode is left by pressing the button 30 5 Deleting stored readings In order to delete stored readings press and hold the button with the buttons set the number f...

Страница 108: ...ission use a special software of our production After inserting the CD to a drive the installation program will start automatically It is necessary to follow the given instructions In the upper wall o...

Страница 109: ...he main function In this option choose Factory data downloads the meter s data name serial number calibration date Last calibration downloads only the last calibration in a chosen measuring function H...

Страница 110: ...ing the batteries it is signalised by blinking elements in the symbol When this symbol starts lighting continuously it informs that the battery is fully charged During the charging process the meter c...

Страница 111: ...pH Efficiency 85 105 Thermal stability of zero 0 001 pH 0 C Range of recognition and entering the pH buffer solutions Calibration point Range 1 0 800 2 100 2 3 900 4 100 3 6 800 7 100 4 8 900 10 200 5...

Страница 112: ...0 00 0 C TDS coefficient range 0 20 1 00 Measuring range for conversion to KCl 0 239 g l Measuring range for conversion to NaCl 0 296 g l Measuring accuracy for conversion to TDS 1 0 Measuring accurac...

Страница 113: ...ution accuracy 1 digit 50 0 199 9 0 C 0 1 0 C 0 1 0 C accuracy of the meter Final accuracy of the measurement depends on the accuracy of the applied Pt 1000 probe Temperature probe Pt 1000 platinum re...

Страница 114: ...5V 1000mA USB power adapter 4 USB A microB cable 5 Data transmission software 6 Manual with warranty Additional equipment 1 Combination pH electrode glass membrane 2 Conductivity cell 3 Oxygen sensor...

Страница 115: ...ate power adapter mechanical damage and breakdown caused by servicing or alterations made by unathorised individuals Conductivity cell oxygen sensor and pH electrode are equipped with separate warrant...

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Страница 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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