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VWR 662-2380, Инструкция по эксплуатации

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- 24 -

12.2. Measurement with manual temperature compensation

Disconnecting the temperature probe from the meter switches the meter to
the   manual   temperature   compensation   mode.   Next   to   the   entered
(not measured) temperature value, instead of the   symbol, the   symbol is
displayed (Pic. 8). The procedure of measurement with manual temperature
compensation is similar to that of measurement with ATC. The difference is in
entering the solution temperature value (description – point 15.5). This value
is   displayed   in   place   of   the   measured   temperature   and   is   used   for
compensation.
Manual compensation may be used in stable conditions, i.e. during laboratory
pH measurements, especially with use of thermostat, or in case of the 
temperature probe breakage.
In case of measurement with manual temperature compensation:
- turn the meter on with the 

 button;

- insert the pH electrode into the vessel with the measured solution; if the

electrode is not calibrated or has already been in use for a long period of
time, perform a calibration (chapter 10). During measurements in a vessel
don’t touch its bottom and walls with the electrode. It is advisable to use an
electrode stand;

- measure   the   temperature   of   the   solution   with   use   of   a   laboratory

thermometer and enter the value according to the point 15.5;

- wait till the value stabilises and read the result. 

Pic. 8

User‘s manual for 

PH-2500L

 pH meter

v1.0x

Содержание 662-2380

Страница 1: ...Instruction manual VWR pH METER PH 2500L EU cat no 662 2380 Version 1 1 Issue 12 2021 ...

Страница 2: ... VWR International bv Researchpark Haasrode 2020 Geldenaaksebaan 464 B 3001 Leuven 3216385011 be vwr com UK Importer VWR International Ltd Hunter Boulevard Magna Park Lutterworth Leicestershire LE17 4XN uk vwr com Country of Origin POLAND ...

Страница 3: ...utions 18 10 4 Calibration with use of standard solutions 20 10 5 Calibration with manual temperature compensation 21 11 Checking the electrode condition 22 12 pH measurement 23 12 1 Measurement with automatic temperature compensation 23 12 2 Measurement with manual temperature compensation 24 III Redox potential and temperature measurement 25 13 Setting the redox potential parameters 26 13 1 Reso...

Страница 4: ...39 18 4 Mode of holding readings HOLD 40 18 5 Viewing the readings 41 19 Calibration report 42 20 Communication with a PC 42 21 Technical data 44 22 Ordering information 45 23 Technical service 46 24 Warranty 46 25 Equipment disposal 47 ...

Страница 5: ... 1 I INTRODUCTION ...

Страница 6: ... other case some of the features may stay unused or using the meter may be troublesome Using electrodes and cells of good quality and replacing them after a suitable time provides obtaining high measuring accuracy It is worth remembering that electrodes have much shorter life time than the meter Clean membrane is the main condition of correct readings After each measurement the membrane should be ...

Страница 7: ...ged by the user automatic change of the stored pH value of the NIST standard solution with the temperature change NIST norm information about the pH electrode condition storing of the calibration date and parameters of three electrodes in each function possibility of introducing the date of calibration validity termination and signalling its expiry signalising of the reading stabilisation READY ho...

Страница 8: ...re compensation is signalised by the symbol the manual compensation by the symbol next to the temperature reading Number of the chosen electrode is displayed on the left E1 E2 or E3 It informs which of the recorded characteristics will be taken into consideration during all calculations Red colour of the electrode number informs about erased characteristic yellow calibration validity date expiry o...

Страница 9: ...ck wall of the meter the sockets are placed with the symbols given below pH mV BNC 50 socket for connecting the combination pH or redox electrode temp RCA Chinch socket to connect the temperature probe USB USB socket for connecting with a PC power DC2 5 socket for connecting the power adapter Pic 2 ...

Страница 10: ...f the chosen function has a possibility of calibration the key becomes active If it has additional parameters the key also becomes active The key is the only key in the meter that responds exclusively to a long press about 2 sec It prevents from accidental erase of the electrode cell calibration data Entering wrong value attempt of calibration when the meter doesn t recognise the standard or attem...

Страница 11: ... time the meter is switched on and requires sending the meter to the manufacturer for servicing In case of the user s data loss i e the pH electrode characteristic the following information will appear Pressing the button accepts and records in the memory standard pH electrode characteristic and enters the measurement screen In such case calibration of the pH electrode is necessary Repeating of th...

Страница 12: ...pressing the window with the chosen function the confirmation mark will be displayed next to it The window for choosing the stabilised reading signalisation mode is placed below Pic 3B the stabilised reading signalisation is off the stabilised reading signalised with changing the frame colour from white to green only for reading marked with a frame the stabilised reading signalised by colour chang...

Страница 13: ... connect the power adapter to the power socket connect prepared combination pH electrode or redox electrode to the pH mV BNC 50 socket in case of using the temperature probe connect it to the temp RCA temperature socket in case of working with a PC connect a suitable cable to the USB socket switch the meter on by pressing the button 7 1 Choosing the kind of the temperature compensation The meter s...

Страница 14: ... 10 II pH MEASUREMENT User s manual for PH 2500L pH meter v1 0x ...

Страница 15: ...it gently with a tissue paper 9 SETTING THE pH MEASUREMENT PARAMETERS Enter the pH measurement parameters setting screen by pressing the pH measurement reading a frame displays on it Pic 4A and next the button The screen Pic 4B enables choosing the resolution electrode number checking the solution type and after pressing the button Pic 4C calibration points and validity time these parameters are e...

Страница 16: ...ter pressing the ELECTRODE No window the table with electrode numbers appears Pic 5 Choose one of the characteristics stored under E1 E2 or E3 number Pic 5 The colour if the number s informs about the electrode s condition white electrode efficient calibration valid yellow electrode efficiency loss detected during the last calibration or the calibration validity date expired see chapter 11 red cha...

Страница 17: ... Pic 4C the electrode condition calibration points validity time and date of the last calibration Markers next to the calibration points windows inform that the last calibration was performed in these particular solutions All the parameters values are stored separately for each of the three electrodes The calibration points may be changed only after entering the calibration mode point 10 2 9 5 Cal...

Страница 18: ...tely If this option is active the calibration should be performed when the applied electrode number E1 E2 or E3 turns yellow For obtaining optimal calibration results the pH values of the applied solutions should be entered to the meter s memory by the user During calibration after putting the pH electrode and the temperature probe into solution the meter detects its pH value automatically When th...

Страница 19: ...ibrate the electrode only in one point with leaving the rest of the data from the previous calibration The characteristic erase is signalised by red colour of the electrode number 10 1 Calibration in buffer or standard solutions Before starting the calibration process prepare the meter according to the chapter 6 and decide whether the calibration will be performed with use of buffer or standard so...

Страница 20: ...calibration mode select the pH measurement on the measurement screen press and hold the button until the background turns red Pic 6A The previous characteristic is erased press the button the pH measurement parameters screen will appear Pic 6B press the SOLUTION window and choose BUFFER press the button the screen with calibration points will appear Pic 6C select the window with a point to be chan...

Страница 21: ...n in this table The range for each of the calibration points is wide what enables to use buffer solutions with values differing from those set by the manufacturer even to a large extent In every case the introduced buffer solution will be automatically detected by the meter There is a possibility to introduce values of buffer solutions with two or three decimal places depending on the chosen resol...

Страница 22: ...de and temperature probe to the pH mV and t sockets respectively Pic 2 enter the calibration mode on the measurement screen mark pH result with a frame press and hold the button until the background turns red Pic 7 A The previous electrode characteristic is erased press the button the pH measurement parameters screen will appear press the SOLUTION window and choose BUFFER check and if necessary en...

Страница 23: ...lise the error after pressing the button with a triple warning sound In such case check the solution value or the electrode which may be broken Only the pH buffers values detected during calibration are calculated any other values recorded earlier do not influence the reading ...

Страница 24: ... value corresponding to this temperature is suggested automatically There is no need to adjust the standard solutions temperature To perform calibration in standards choose the electrode number E1 E2 or E3 according to the point 9 2 and mark the electrode with this number connect the pH electrode and temperature probe to the pH mV and t sockets respectively Pic 2 enter the calibration mode on the ...

Страница 25: ...ier do not influence the reading After calibrating the electrode two other electrodes may be calibrated after choosing the other electrode numbers In case of choosing the electrode number entering the calibration mode and exiting it without performing calibration the stored characteristic will be erased and the standard characteristic will be adopted The characteristic erasing is signalised with r...

Страница 26: ... Standard Error of Measurement In the given example it will be equal 11 634 mV The SEM parameter may be also checked by immersing the electrode in 7 00 pH buffer and switching the meter to measurement in mV When the electrode is calibrated its condition may be checked To check enter the calibration points screen according to description in the point 9 4 The top left of the screen Pic 4C displays t...

Страница 27: ...h pH and calculates its influence to the pH reading In case of measurement with automatic temperature compensation turn the meter on by pressing the button connect the temperature probe and the combination pH electrode to the pH mV and t sockets respectively Pic 2 the symbol will be displayed immerse the electrode and the temperature probe in the measured solution During measurements in vessels do...

Страница 28: ...ay be used in stable conditions i e during laboratory pH measurements especially with use of thermostat or in case of the temperature probe breakage In case of measurement with manual temperature compensation turn the meter on with the button insert the pH electrode into the vessel with the measured solution if the electrode is not calibrated or has already been in use for a long period of time pe...

Страница 29: ... 25 III REDOX POTENTIAL AND TEMPERATURE MEASUREMENT ...

Страница 30: ...is entered by selecting the redox potential reading a frame will be displayed around it Pic 9A and the button The screen Pic 9B enables choosing the resolution the reference temperature and setting the zero offset for the relative measurement Pic 9 User s manual for PH 2500L pH meter v1 0x ...

Страница 31: ...rs screen Pic 9B select the RELATIVE MEAS window Pressing the window again turns the relative measurement off In case of choosing the relative measurement the REL symbol will be displayed on the right side of reading The displayed reading is a difference between the measured and the reference voltage value 13 3 Reference voltage After choosing the relative measurement the REF VOLTAGE window appear...

Страница 32: ...asurement turn the meter on by pressing the button choose the redox potential measurement to be displayed on the measuring screen according to the point 17 1 enter the measurement parameters according to the point 13 return to the measurement screen by pressing the button and check the reading Pic 10 Pic 10 User s manual for PH 2500L pH meter v1 0x ...

Страница 33: ... 11B The screen enables choosing resolution probe group unit and entering the manual temperature compensation value Pic 11 After setting the parameters return to the measurement screen by pressing the button 15 1 Resolution The reading can be displayed with low or high resolution By pressing the RESOLUTION window choose 1 0 C measurement resolution 0 1 0 C measurement resolution ...

Страница 34: ...y for the measurement To adjust the meter for cooperation with Pt 1000B standard sensor into the SENSOR GROUP window insert the nn00 number where nn cable lenght in meters in range 1 19m For the Pt1000B sensor on 1 meter cable the number will be 100 the zero at the frontal position is not displayed and for the same sensor on 15 meter cable the number will be 1500 As standard the meter is set for c...

Страница 35: ... Pt 1000 platinum resistor sensor and the final accuracy of the temperature measurement is dependent on the sensor s class Pic 12 NOTE break in the temperature probe s circuit switches the meter to the manual temperature compensation mode It is signalised by change of the symbol to the symbol Instead of the measured temperature value the value inserted by the user is displayed Displaying of 50 C v...

Страница 36: ... 32 IV OPTIONS User s manual for PH 2500L pH meter v1 0x ...

Страница 37: ...se the language set the economical mode time and date INFO information about the software version the serial number and the factory calibration date 17 1 Function This tab enables choosing the measurement functions to be displayed on the measurement screen After entering this screen the recently chosen configuration is displayed Pic 13 After pressing the window with the chosen function the confirm...

Страница 38: ... brightness ECONOMIC MODE the time of non use the last press of any button until the meter switches to the economical mode reducing the brightness to the minimum TIME SETUP after pressing the TIME SETUP window the screen will appear Pic 14C to turn the time displaying on off chose the 12 24 clock mode and set the current time DATE SETUP after pressing the DATE SETUP a screen will appear Pic 14D wh...

Страница 39: ... 35 Pic 14 ...

Страница 40: ...umerical value press the chosen window a numerical keyboard will appear to enter the value and confirm with the button 17 4 Info The INFO tab contains the software version the serial number and the factory calibration date Pic 15 Pic 15 Return to the measurement mode by pressing the button User s manual for PH 2500L pH meter v1 0x ...

Страница 41: ...creen Enter the screen from the measurement screen by pressing the screen Pic 16 The screen enables setting the following parameters MODE choosing the collecting series mode MANUAL AUTO and STOP Each press of the window changes the mode INTERVAL the interval between recorded readings in the automatic mode NUMBER OF SAMPLES number of measurements to be recorded in the automatic mode Next to the col...

Страница 42: ...ottom of the measurement screen If the memory already contains any readings a table will appear to choose among DELETE ADD and RETURN At the bottom part of the measuring screen the and buttons will appear Every press of the button records the reading Press the button if you want to quit the reading collecting mode If pressing the button results in filling the last free space in the memory the mete...

Страница 43: ...e deleted or the new readings placed after the earlier recorded ones The buttons at the screen bottom will be replaced with the button and the meter will start collecting measurement series At the top of the screen below the clock and date displays the recorded sample number and the declared number of samples Collecting series is finished when the declared number of samples has been collected the ...

Страница 44: ...g screen in the place of the button the button will appear Pressing this button holds all the readings the green frame displays around them and the button appears at the bottom of the screen Pic 19 Pressing this button returns the meter to the measurement function Pic 19 User s manual for PH 2500L pH meter v1 0x ...

Страница 45: ...reen press the button A screen with the readings collected in the memory will display Pic 20 change the displayed sample number with the buttons or display the first or the last sample with use of the buttons or press the button a numerical keyboard will display to enter the number of the chosen sample and confirm with the button Pic 20 Return from the memory review mode by pressing the button ...

Страница 46: ... of our production It may be downloaded from the web site After downloading start the installation It is necessary to follow the given instructions In the back wall of the meter the USB connector is placed for connecting it with the PC After connecting turn on the meter and the PC and launch the transmission software In the SETUP PORT menu choose USB Next choose the mode of cooperation with the me...

Страница 47: ...ata name serial number calibration date Last calibration downloads only the last calibration in a chosen measuring function History of calibration downloads all the stored calibrations in a chosen measurement function The first downloaded calibration will be the most recent one Signatures space for a handwritten signature The data will be downloaded after choosing an option and pressing the START ...

Страница 48: ... 1 mV 0 1 mV Input impedance 1012 W Relative measurement range 3999 9mV TEMPERATURE MEASUREMENT range resolution accuracy 1 digit 50 0 200 0 0 C 0 1 0 C 0 1 0 C Accuracy given for the meter The final accuracy depends on the type of Pt 1000 probe Temperature probe Pt 1000 platinum resistor The probe s accuracy in range 0 100 0 C for Pt1000B resistor 0 8 0 C for Pt1000S resistor 0 27 0 C OTHER MEMOR...

Страница 49: ...1264 Buffer solutions 20 C AVS TITRINORM pH 4 100 ml plastic bottles 32095 184 500 ml plastic bottles 32095 264 pH 7 100 ml plastic bottles 32096 187 500 ml plastic bottles 32096 267 pH 10 100 ml plastic bottles 32040 185 500 ml plastic bottles 32040 260 Storage solution Potassium chloride 3 mol l 3 N in Aqueous solution AVS TITRINORM 100 ml Plastic bottle 83605 180 EH 10 Electrode holder 662 2352...

Страница 50: ...e or misapplication or from ordinary wear and tear If the required maintenance and inspection services are not performed according to the manuals and any local regulations such warranty turns invalid except to the extent the defect of the product is not due to such non performance Items being returned must be insured by the customer against possible damage or loss This warranty shall be limited to...

Страница 51: ...your responsibility to decontaminate the equipment in case of biological chemical and or radiological contamination so as to protect from health hazards the persons involved in the disposal and recycling of the equipment For more information about where you can drop off your waste of equipment please contact your local dealer from whom you originally purchased this equipment By doing so you will h...

Страница 52: ...Ltd VWR International Northern Ireland Ltd Orion Business Campus Northwest Business Park Ballycoolin Dublin 15 Tel 353 01 88 22 222 Email sales ie vwr com Italy VWR International S r l Via San Giusto 85 20153 Milano MI Tel 39 02 3320311 02 487791 Email info it vwr com Korea VWR International 17 Daehak 4 ro Yeongtong gu Suwon si Gyeonggi do Tel 82 31 645 7256 saleskorea avantorsciences co m Middle ...

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