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GTORP20 ORP测试笔  说明书

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GTCON20笔式电导率仪说明书

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GTPH20 PH测试笔 说明书

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MP515电导率测定仪 英文版说明书

Model MP515Precision Conductivity MeterOperation ManualShanghai San-Xin Instrumentation, Inc.MP500 Series of Electrochemical Meters一.Multi-parameter MeterModel MP551pH/mV/ISE/Cond/DO Meter二.Double Parameter Meters1. Model MP521 Lab pH/Cond Meter (pH:±0.01 pH;Conductivity: ±1.0% FS)2. Model MP522 Precision pH/Cond Meter (pH:±0.002 pH; Conductivity: ±0.5% FS)3. Model MP523 pH/ISE Meter4. Model MP525 pH/DO Meter5. Model MP526 Cond/DO Meter三.Single Parameter MetersMP511 Lab pH Meter (±0.01 pH)MP512 Precision pH Meter (±0.002 pH)MP513 Lab Conductivity Meter (±1.0% FS)MP515 Precision Conductivity Meter (±0.5% FS)MP516 DO MeterMP517 Sodium Ion Concentration MeterMP518 Calcium Ion Concentration MeterMP519 Fluoride Ion Concentration MeterTable of Content1. Brief Introduction -------------------------------------------------------------------2. Technical Parameters ---------------------------------------------------------------3. Introductions to the Meter ---------------------------------------------------------3.1. LCD Display --------------------------------------------------------------------3.2. Operation Keys ------------------------------------------------------------------3.3. The Storage, Recall and Elimination of the Measuring Information -----3.4. RS-232 Communication -------------------------------------------------------3.5. Sockets ---------------------------------------------------------------------------4. Conductivity Measurement --------------------------------------------------------4.1. Preparation Work ---------------------------------------------------------------4.2. Electrode Calibration -----------------------------------------------------------4.3. Sample Test ----------------------------------------------------------------------4.4. Important statements -----------------------------------------------------------4.5. Parameter Setting ---------------------------------------------------------------4.6. Considerations -------------------------------------------------------------------5. Meter’s Complete Kit --------------------------------------------------------------6. Warranty -----------------------------------------------------------------------------ChartⅠ Meter Producer Setting ScheduleChartⅡ Code Icon and Abbreviation Schedule1. Brief Introduction:Thanks for buying and using the Model MP515 Precision Conductivity Meter (the following called “meter” in short).Before using this meter, please read the operation manual carefully in order to help use and maintain it correctly. On the basis of improving instrument performance constantly, we reserve the right of changing the content of this manual and accessories in case of not notifying in advance.This meter is a perfect combination with the most advanced electronic, sensor technology and software design which is the best lab conductivity analysis meter with the highest performance and the lowest cost. It is suitable for the trade such as the petroleum, chemical industry, medicine, power plant and environmental protection, etc., especially has more extensive application in the fields of education and scientific research.Built-in microprocessor chip, beautiful appearance and convenient operations, this meter has the following prominent features:1.1. Meter meets with the requirement of international GLP standards. Its features up to automatic calibration, automatic temperature compensation, data storage, timing measurement, clock display, RS-232 output and function setting etc.1.2. Adopts digital filter and step slipping technology to improve meter’s response speed and result accuracy. “      ” will appear when reading to be stable.1.3. Adopts advanced automatic frequency convertible and voltage regulation technology to enlarge the measuring range of conductivity electrode which constant K=1 to 10 times. It can meet measuring accuracy requirement for range within 100mS/cm by using only one-point calibration. It is the particular one–point calibration function for this meter.1.4. Automatically recognize 8 kinds of conductivity standard solution. User can choose anyone from two series of solutions: Europe & USA series and China series.1.5. Automatic choose conductivity measuring range, the meter has function of non-linearity automatic temperature compensation for high purified water less than 10μS/cm, which can greatly improve the measuring accuracy. It is especially suitable for electric power, microelectronics and medicine business.1.6. Meter’s circuit board adopts SMT film-covering technology to improve meter’s reliability.1.7. Meter has the only product serial number.1.8. Dustproof and waterproof meter meets IP54 standards, all sockets are seal protected by the silica gel caps.2. Technical Parameters:2.1. Conductivity:Measuring rangeConductivity: (0 to 2×106) μS/cm, can be divided into below 6 ranges:(0.00 to 20.00)μS/cm; (20.0 to 200.0)μS/cm;(200 to 2000)μS/cm; (2.00 to 20.00) mS/cm;(20.0 to 200.0) mS/cm; (200 to 2000) mS/cm (K=10).Resistivity:(0 to 100) MΩ·cmTDS:      (0 to 100) g/LSalinity:    (0 to 100) pptResolution0.01/0.1/1μS/cm  0.01/0.1/1 mS/cmAccuracyMeter: ±0.5% FS; connect meter with electrode: ±0.75% FSTemp. compensation range(0 to 50) ℃ (automatic)Electrode constant0.1 / 0.5 / 1 / 5 / 10 / 100 cm-1Reference temperature25℃, 20℃ and 18℃2.2. Temperature:Measuring range-10℃to 110℃Resolution0.1℃Accuracy5~ 60℃ range:±0.4℃  other range:±0.8℃2.3. Other Technical Parameters:Data storage600 groupsStorage contentMeasuring value serial number, measuring value, temperature, ATC or MTC state, measuring date and timePowerDC9V/300mACommunication connectorRS-232Size and weight160 × 190 × 70mm/880gQuality and safety certificationISO9001:2000, CE and CMC2.4. Working Condition:Environment temperature(5 to 35) ℃Environmental humidity≤80%IP ratingIP54 Dustproof and waterproof  3. Introductions to the Meter:3.1. LCD Display:① —— Measuring mode icon② —— Measuring value③ —— Time, date and the indication icons for special measuring state.④ —— Measuring unit⑤ —— Temperature compensation icon:ATC — automatic temperature compensationMTC — manual temperature compensation⑥ —— Serial number and icon of the measuring value stored and recalled.M+ — measuring value to be stored iconRM — reading to be recalled icon; The left digit means serial number.⑦ —— The measured temperature value and unit⑧ —— RS-232 communication icon. When this icon appears, means meter has been connected with computer.⑨ —— Timing measuring icon⑩ —— Electrode calibration indication icon—— Measuring value stable icon3.2. Operation Keys:The meter has 8 operation keys in all.3.2.1. <     > — Switch key3.2.2. < CAL > — Calibration key, to make meter enters into calibration mode.3.2.3. < MODE > — Function key, press key to enter into the parameter setting mode, and will in turn display P1, P2, P3…3.2.4. < UNIT > — Parameter mode key, press this key to alter the parameter mode:       (resistivity) →       (total dissolved solid) →      (salinity) →         (conductivity); press key to choose modified position of parameter when in the parameter setting state.3.2.5. < ENTER > — Entrance key, when in the state of calibration or parameter setting, press the key to confirm. Then the meter enters into measuring state after pressing this key.3.2.6. < ▲ > and < ▼ > — Increase and decrease keyWhen in MTC state, press the key to increase or decrease the temperature value. Short-time press to alter 0.1℃ each time, while depress, the temperature will alter rapidly. When in the state of parameter setting, press the key to alter the number or ON/OFF state.3.2.7. < M+/RM > — The compound key of memory and recall, short-time press (press time <1.5s) to save the measuring data, depress (press time > 2 s) to recall the saved measuring value.3.3. The Storage, Recall and Elimination of the Measuring Information:3.3.1. Store the measuring information:(a) In the measuring mode, short press < M+/RM > key, LCD will display “ M+ ” icon and storage serial number, and meanwhile memory all the measuring information including time, date, serial number, measuring data, measuring unit, temperature, temperature compensation state and so on, meter can memory 600 groups of measuring information.(b) When setting the timing measuring function, “    ” icon will appear on the LCD, and the meter will measure according to the time intervals set, and store the measuring information at the same time.3.3.2. Recall measuring information:(a) Under the measuring mode, depress the < M+/RM > key, the meter will recall the last stored information, and the storage serial number and “ RM ” icon will appear in the lower right corner of the LCD, and the complete measuring information, measuring time and date will be displayed alternatively on the upper right corner of LCD. Again press < ▼ > or < ▲ > key, meter will recall all the measuring information in turn, depress < ▼ > or < ▲ > key to rapidly check the measuring information under other serial number;(b) In the recalling mode (there are “ RM ” icon and storage serial number in the lower right corner of the LCD), press < ENTER > key to return to the measuring mode.3.3.3. Eliminate the stored measuring information:In the recalling mode, depress the < M+RM > key for 5s, “      ” icon will display on the LCD for 2s. It means the internal storage has been eliminated, and then returns to measuring mode.3.4. RS-232 Communication:3.4.1.This meter adopts MP515 communication software which can achieve RS-232 communication function. The requirements for computer of this application software are: PC can stable operate the Windows XP operating system (Microsoft Excel 2000 or much higher version has been installed in PC). According to different selection of resolution setting (1280 x 1024 or 1280 x 800) to install MP515 communication software by following the indications. Open the MP515 communication software and connect meter, the LCD will display “     ” RS-232 communication icon. Meanwhile all the stored information including measuring value, measuring unit, temperature, temperature compensation state (ATC or MTC) and the last calibration information (calibration time, date and solution) will be transmitted to the computer.3.4.2.Again press < M+/RM > key after meter being connected with computer, or  timing measuring function has been set, all the measuring information will be transmitted to computer through RS-232 and won’t be stored in meter. And there will also display a curve graph of measurement value changing with time on the interface of computer.3.4.3. User can do operation such as analyzing, counting or printing etc. for all measuring information in “ Microsoft Excel ” file through the key “ Lead out ” in the interface of computer.3.5. Sockets:3.5.1. TEMP — Temperature electrode socket (RCA microphone socket)3.5.2. COND — Conductivity electrode socket (four pins socket)3.5.3. RS232 — RS232 communication connector socket3.5.4. DC9V — DC9V power socket, Ф2.5, inner “+ ” outer “ - ”.4. Conductivity Measurement:4.1. Preparation Work:4.1.1. Switch in power, press <     >key to turn on the meter, meter displays     mode;4.1.2. Press <UNIT> key to choose       (resistivity) →      (total dissolved solid) →      (salinity) →      (conductivity);4.1.3. Install electrode holder and debug it properly;4.1.4. Connect the 2401-M conductivity electrode into meter.4.2. Electrode Calibration:Press < CAL > key, “      ” is flashing on the upper right corner of LCD, indicate enters into the calibration mode, and wash the conductivity electrode with purified water and dry it, then insert it into the 1413μS/cm calibration solution, still it after stirring, when “    ” icon appears, means the display value is stable and again press < CAL > key, LCD will display flashing “ 1.413mS/cm ”, several seconds later the “      ” icon will appear and return to the measuring mode, at this time, LCD will display stable measuring value and calibration icon “   ”, indicate the calibration is finished.Note: Meter only can be calibrated under the mode of      , and can not be calibrated in mode of    ,     and     , must switch tomode, and again switch to the original mode after finishing calibration.4.3. Sample Test:4.3.1. Wash the conductivity electrode and throw off the water on it, then insert it into the solution, still it after stirring, (if the electrode is installed on the electrode rack to test, then need to short-shaking electrode rack), and take the reading after “    ” appears, which is the conductivity value of solution.4.3.2. Press < UNIT > key can display the value of the resistivity, TDS or salinity value which correspond the conductivity value.4.3.3. When using the conductivity electrode of electrode constant K=10, the measuring range can be enlarged to 2000mS/cm.4.4. Important Statements:4.4.1. This meter build-in below two kinds of calibration solution series, please set up in the parameter P1;(a)      (Europe & U.S.A. series) — 84μS/cm, 1413μS/cm, 12.88 mS/cm and 111.9 mS/cm(b)     (China series) — 146.6μS/cm, 1408μS/cm, 12.85mS/cm and 111.3 mS/cm4.4.2. This meter has the unique one-point calibration function, user can choose the calibration solution based on the principle of the water samples and calibration solution conductivity as close as possible, in general the commonly used calibration solution is 1413 μ S / cm. The equipped 2401 - M conductivity electrode (K = 1 cm-1) can be used within the range less than 100 mS / cm after calibrating with 1413 μ S / cm calibration solution. User can choose according to the chart (4-1).Chart (4-1)Measuring range0.05 to 20μS/cm0.5μS/cm to 200mS/cm100 to 2000mS/cmElectrode constantK=0.1cm-1(flow test)K=1.0cm-1K=10cm-1Calibration solution84μS/cm84μS/cm1413μS/cm12.88 mS/cm111.9 mS/cm111.9mS/cmCalibration indication icon4.4.3. There are two kinds of calibration methods which have been set in meter, the standard solution calibration method and constant calibration method, it is the standard solution calibration method in item 4.2. “Electrode Calibration”, the priority choice is standard solution calibration method, for it can ensure better accuracy when the accuracy of standard solution is accurate. If user is used to use constant calibration method, please set the electrode constant in the parameter set of P5 (see P17 item 4.5.6.). The two calibration methods can be selectively chose to use, they won’t affect each other. LCD won’t display calibration indication icon when adopting constant calibration method.4.4.4. The temperature compensation coefficient of meter is 2.0%/℃ by producer setting. However, the conductivity temperature coefficient is different for solution of different variety and concentrations, the user can refer chart  (4-2), as well as the data which they own get in the experiment, to set in the parameter setting of P4. Meter will do automatic non-linear temperature compensation in the high purified water which less than 10 μ S / cm.Please note that when setting the temperature coefficient of compensation to be 0, means there is no temperature compensation when testing, the measuring value is based on current temperature.Chart (4-2)SolutionTemperature compensation coefficientNaCl salt solution2.12%/℃5%NaOH solution1.72%/℃Dilute ammonia solution1.88%/℃10% hydrochroric acid solution1.32%/℃5% sulfuric acid solution0.96%/℃4.4.5. The information of meter’s other parameter setting, please refer to the chart (4-3).4.4.6. Special attention: when the content of parameter setting is consistent with content of producer setting, conductivity measuring interface will display as picture (4-1), the upper right corner of LCD will display time, when the content for parts of parameter setting are different with content of producer setting, conductivity measuring interface will display as picture (4-2), the code icon will appear on the upper right of LCD, when parameters with code symbol to be set more than two, LCD just displays one of the code symbols, user should enter into the parameter setting interface and carefully check the contents of setting or restore the meter to producer setting and again set needed parameters.   4.5. Parameter Setting:4.5.1. Conductivity testing parameter setting schedule (chart (4-3))Chart (4-3)Prompt MarkParameter Setting ItemsCodeParametersP1Standard solution series selectionUSA(84μS/cm, 1413μS/cm, 12.88 mS/cm, 111.9 mS/cm)CH(146.6μS/cm, 1408μS/cm, 12.85mS/cm, 111.3 mS/cm)P2Electrode constant type selection0.1, 0.5, 1, 5, 10, 50, 100P3Benchmark temperature selection25℃  20℃  18℃P4Temperature compensation coefficient setting0.00 to 9.99%P5Constant calibration settingP6Time for timing measuring setting0 to 99 minutesP7Temperature unit setting℃ ℉P8Date settingDateMonth / Day / YearP9Time settingTimeHour / MinuteP10Restore to producer settingOFF-On (shut-set)4.5.2. Conductivity calibration solution series selection (P1)(a) Press < MODE > key, meter enters into P1            mode, see picture (4-3);(b) Press < ▲ > key to choose the standard solution series: USA (Europe & U.S.A. series), CH (China series)(c) Press< MODE > key to enter into next parameter setting or press < ENTER > key to confirm and return to measuring mode.Hh4.5.3. Electrode constant selection (P2)(a) Under P1 mode to press the < MODE > key and enters into P2 mode;(b) Press < ▲ > or < ▼ > key to change the constant setting: 0.1→0.5→1→5→10→50→100;(c) Press< MODE > key to enter into next parameter setting or press < ENTER > key to confirm and return to measuring mode;(d) The producer setting of P2 is K=1.4.5.4. Benchmark temperature selection (P3)(a) Under P2 mode to press < MODE > key and enter into the P3 mode;(b) Press < ▲ > or < ▼ > key to choose the benchmark temperature: 25℃→20℃→18℃;(c) Press< MODE > key to enter into next parameter setting or press < ENTER > key to confirm and return to measuring mode.(b) The producer setting of P3 is 25℃.Attention: If change the benchmark temperature to be other numerical value, upper right corner of LCD will display “       ”icon when in measuring mode.4.5.5. Temperature compensation coefficient setting (P4)(a) Under P3 mode to press < MODE > key and enters into P4 mode, shown as picture (4-4);(b) Press < UNIT > key to shift,press < ▲ > or < ▼ > key to change the number, the data changing range is from 0.00 to 9.99;Attention: When set the number to be 0.00, means there is no temperature compensation. For details please see item 4.4.4.;(c) Press< MODE > key to enter into next parameter setting or press < ENTER > key to confirm and return to measuring mode;(d) The producer setting of P4 is 2.00%.Attention: If change the temperature coefficient to be other numerical value, the upper right corner of LCD will display “      ” icon when in measuring mode.4.5.6. Constant calibration setting (P5), please refer to item 4.4.3.(a) Under P4 mode to press < MODE > key and enters into P5 mode, LCD display last calibration constant, show as picture (4-5);(b) Press < UNIT > key, data moves to right and flashing, press < ▲ > or < ▼ > key to change number based on the constant which marks on the body of conductivity electrode when the figure is flashing.(c) Press< MODE > key to enter into next parameter setting or press < ENTER > key to confirm and return to measuring mode;(d) If need to do calibration for other conductivity electrode which constant K is not 1, such as conductivity electrode with constant K=10.3, should enter into constant setting P2 to set the constant to be “10”, then enter into P5 mode and set the constant to be 10.3.4.5.7. Time for timing measuring setting (P6)(a) Press < MODE > key in mode P5 to enter into mode P6, see picture (4-6).(b) Press < UNIT > key, the “    ” will move rightward in turn and flash. Press < ▲ > or < ▼ > to alter the number when number is flashing.(c) Press< MODE > key to enter into next parameter setting or press < ENTER > key to confirm and return to measuring mode.(d) Producer setting is “ 0 ” second.Note:in the form “         ”, the number in the front of “ :” is minute, and the maximum setting is 99, in the back of “ :” is second, the maximum setting is 59. After setting the timing measurement mode, LCD will display the “      ”.4.5.8. Temperature unit ℃/℉ setting (P7)(a) Press < MODE > key in mode P6 to enter into mode P7, see picture (4-7).(b) Press < ▲ > or < ▼ > key to choose temperature unit: ℃or℉.(c) Press< MODE > key to enter into next parameter setting or press < ENTER > key to confirm and return to measuring mode.4.5.9. Date setting (P8)(a) Press < MODE > key in mode P7 to enter into mode P8, see picture (4-8).(b) Press < UNIT > key, the number will move rightward and flash, press < ▲ > or < ▼ > key to alter the number. The upper right is month-day and lower right is year.(c) Press< MODE > key to enter into next parameter setting or press < ENTER > key to confirm and return to measuring mode.4.5.10.Time setting (P9)(a) Press < MODE > key in mode P8 to enter into mode P9, see picture (4-9).(b) Press < UNIT > key, the number will move rightward and flash, press < ▲ > or < ▼ > key to alter the number when number is flashing.(c) Press< MODE >key to enter into next parameter setting or press < ENTER > key to confirm and return to measuring mode.4.5.11. Restore to producer setting (P10)(a) Press < MODE > key in mode P9 to enter into mode P10, see picture (4-10).(b) Press < ▲ > key to choose “    ”, means parameter setting has been restored to the producer setting mode, and return to measuring mode after 2s.4.6. Considerations:4.6.1. The conductivity electrode has been calibrated before meter leaving factory, user can directly use it under normal circumstance;4.6.2. It is recommended to calibrate one time every month under the normal circumstances. It must be calibrated in time for high accuracy measurement. It is necessary to calibrate the newly purchased conductivity electrode or after using a certain period;4.6.3. Keep the conductivity electrode clean and wash it with purified water, then throw off the water on it before and after testing. It’d better to rinse electrode with sample solution when measuring;4.6.4. The platinum surface of 2401-M conductivity electrode is plated with a layer of metal platinum black to use as reducing the electrode polarization, enlarging the measuring range, so the surface of platinum can not be rubbed, and it only can be washed in water in case of damaging the platinum black coating. Wash the organic component pollution with tepid water containing detergent or with alcohol.4.6.5. Conductivity electrode before use can be immersed in water, to prevent the platinum black to be passivated, if found the platinum black plated electrode is invalid, can immerse it into 10% nitric acid solution or 10% hydrochloric acid for 2 minutes, then rinse with purified water and again test. The platinum black needs to be recoated, or replacing a new conductivity electrode if this situation does not improve.4.6.6. Please set P10 to be “On” to make meter restore to producer setting when meter’s calibration or display appears abnormal phenomenon, and do calibrate and test again.4.6.7. Please don’t take power plug out when meter still working, user only can take out the plug after meter to be turned off.5. Meter’s Complete Kit:5.1. Model MP515 precision conductivity meter5.2. Model 602 flexible electrode holder5.3. 2401-M conductivity electrode5.4. 1413μS/cm conductivity standard solution (50mL)5.5. 9V power adapter5.6. RS-232 communication cable5.7. MP515 communication software CD5.8. Operation manual5.9. Brief operation instruction6. Warranty:6.1. We warrant this meter to be free of charge maintain, replace the parts or products under normal using circumstances, from purchased time within one year caused by manufacturing bad and unable to work.6.2. Attached conductivity electrode does not belong to this warrant range, but, if the newly purchased electrode went wrong without using, it’s free of charge to maintain or replace.6.3. The above warranty is not apply to defects resulting from action of user such as misuse, improper wiring, operation outside of specification, improper maintenance or repair, or unauthorized modification.Chart Ⅰ Meter Producer Setting SchedulePrompt MarkParameter Setting ItemsParametersCodeP2Electrode constant type selectionK=1P3Benchmark temperature selection25℃P4Temperature compensation coefficient setting2.0%P6Time for timing measuring setting0 secondChart Ⅱ Code Icon and Abbreviation ScheduleCode and AbbreviationEnglishExplanationSolutionStandard solutionChinaChina series standard solutionUSAEurope & U.S.A series standard solutionConstantElectrode constant type selectionTemperature Compensation CoefficientTemperature compensation coefficient settingTemperature ReferenceBenchmark temperature settingConstant CalibrationConstant calibration settingEndCalibrationConductivityResistivityTotal Dissolved SolidSalinity

MP512 台式pH计  英文版说明书

Model MP512 Precision pH MeterOperation ManualShanghai San-Xin Instrumentation, Inc.MP500 Series of Electrochemical Meters一.Multi-parameter MeterModel MP551pH/mV/ISE/Cond/DO Meter二.Double Parameter Meters1. Model MP521 Lab pH/Cond Meter (pH: ±0.01 pH; Conductivity: ±1.0% FS)2. Model MP522 Precision pH/Cond Meter (pH: ±0.002 pH; Conductivity: ±0.5% FS)3. Model MP523 pH/ISE Meter4. Model MP525 pH/DO Meter5. Model MP526 Cond/DO Meter三.Single Parameter MetersMP511 Lab pH Meter (±0.01 pH)MP512 Precision pH Meter (±0.002 pH)MP513 Lab Conductivity Meter (±1.0% FS)MP515 Precision Conductivity Meter (±0.5% FS)MP516 DO MeterMP517 Sodium Ion Concentration MeterMP518 Calcium Ion Concentration MeterMP519 Fluoride Ion Concentration MeterTable of Contents1. Brief Introduction-------------------------------------------------------------------2. Technical Parameters---------------------------------------------------------------3. Introductions to the Meter----------------------------------------------------------3.1. LCD Display---------------------------------------------------------------------3.2. Operation Keys ------------------------------------------------------------------3.3. The Storage, Recall and Elimination of the Measuring Information------3.4. RS-232 Communication--------------------------------------------------------3.5. Sockets ---------------------------------------------------------------------------4. pH Measurement--------------------------------------------------------------------4.1. Preparation Work ----------------------------------------------------------------4.2. Electrode Calibration -----------------------------------------------------------4.3. Sample Test-----------------------------------------------------------------------4.4. Parameter Setting ---------------------------------------------------------------4.5. Considerations-------------------------------------------------------------------4.6. Self-diagnose Information-----------------------------------------------------5. mV and ORP Measurement ------------------------------------------------------5.1. Sample Test ----------------------------------------------------------------------5.2. Considerations-------------------------------------------------------------------5.3. Parameter Setting ---------------------------------------------------------------6. Meter’s Complete Kit --------------------------------------------------------------7. Warranty -----------------------------------------------------------------------------ChartⅠ Meter Parameter Setting ScheduleChartⅡ Meter Restore to Producer Setting ScheduleChart Ⅲ Code Icon and Abbreviation Schedule1. Brief Introduction:Thanks for buying and using the Model MP512 Precision pH Meter (the following called “meter” in short).Before using this meter, please read the operation manual carefully in order to help use and maintain it correctly. On the basis of improving instrument performance constantly, we reserve the right of changing the content of this manual and accessories in case of not notifying in advance.This meter is a perfect combination with the most advanced electronic, sensor technology and software design which is the best lab pH analysis meter with the highest performance and the lowest cost. It is suitable for the trade such as the petroleum, chemical industry, medicine, power plant and environmental protection, etc., especially has more extensive application in the fields of education and scientific research.Built-in microprocessor chip, beautiful appearance and convenient operations, this meter has the following prominent features:1.1. Meter meets with the requirement of international GLP standards. Its features up to automatic calibration, automatic temperature compensation, data storage, timing measurement, clock display, RS-232 output, function setting and self-diagnose etc.1.2. Adopts digital filter and step slipping technology to improve meter’s response speed and result accuracy. “     ” icon will appear when data to be stable.1.3. Automatically recognize 13 kinds of pH buffer solution. User can choose anyone from four series of standard buffer solutions: Europe & USA series, NIST series, CHINA series and Self-defined series.1.4. High purified water and ammonia added purified water pH measuring mode can be set up, for this two special pH measuring modes, expect the general slope temperature compensation, also added function of solution temperature  compensation to make measuring accuracy to be more improved, especially suitable for electric power and petrochemical industry.1.5. With EH redox potential measuring mode can directly display ORP value which against standard potential of hydrogen electrode.1.6. Meter’s circuit board adopts SMT film-covering technology to improve meter’s reliability.1.7. Meter has the only product serial number.1.8. Dustproof and waterproof meter meets IP54 standards. All sockets are seal protected by the silica gel caps.2. Technical Parameters:2.1. pH:Measuring range(-2.000 to 19.999) pHResolution0.1/0.01/0.001 pHAccuracyMeter: ±0.002 pH; meter connect with electrode:±0.01 pHInput current≤1×10-12 AInput impendance≥3×1012 ΩStability±0.005 pH/3hTemp. compensation range(0 to 100) ℃ ( automatic or manual )2.2. mV:Measuring range ( mV/ORP/EH )-1999.9 mV to 0 to 1999.9mVResolution0.1mVAccuracy±0.03% FS2.3. Temperature:Measuring range-10℃to 110℃Resolution0.1℃Accuracy5 to 60℃ range: ±0.4℃  other range: ±0.8℃2.4. Other Technical Parameters:Data storage600 groupsStorage contentMeasuring value serial number, measuring value, temperature, ATC or MTC state, measuring date and timePowerDC9V/300mACommunication connectorRS-232Size and weight160 × 190 × 70mm/880gQuality and safety certificationISO9001:2000, CE and CMC2.5. Working Condition:Environment temperature15 to 30 ℃ ( 0.001 grade )Environmental humidity≤75%IP ratingIP54 Dustproof and waterproof  3. Introductions to the Meter:3.1. LCD Display:① —— Parameter mode icon② —— Measuring value③ —— Time, date and the indication icons for special measuring state.④ —— Measuring unit⑤ —— Temperature compensation state icon:ATC — automatic temperature compensationMTC — manual temperature compensation⑥ —— Serial number and icon of the measuring value stored and recalled.M+ — measuring value to be stored iconRM — reading to be recalled icon; The left digit means serial number.⑦ —— The measured temperature value and unit⑧ —— RS-232 communication icon. When this icon appears, means meter has been connected with computer.⑨ —— Timing measuring icon⑩ —— Electrode calibration indication icon—— Measuring value stable icon3.2. Operation Keys:The meter has 8 operation keys in all.3.2.1. <     > — Switch key3.2.2. < CAL > — Calibration key to make meter enter into calibration mode.3.2.3. < MODE > — Function key(a) Short-time press (time<1.5s) to switch the parameters, the meter will display and      ;(b) Depress (time >2s) to enter into the parameter setting mode P1, and again short-time press, will in turn display P2, P3…3.2.4. < UNIT > —Unit and parameter mode key(a) when in       mode, press the key to alter pH resolution: 0.001→0.01→0.1pH;(b) When in mode      , press this key to alter the parameter mode      →  →      →      ;(c) Press key to choose modified position of parameter when in the parameter setting state.3.2.5. < ENTER > — Entrance key, when in the state of calibration or parameter setting, press the key to confirm. Then the meter enters into measuring state.3.2.6. < ▲ > and < ▼ > — Increase and decrease key.When in MTC state, press the key to increase or decrease the temperature value. Short-time press to alter 0.1℃ each time, while depress, the temperature will alter rapidly. When in the state of parameter setting, press the key to alter the number or ON/OFF state.3.2.7. < M+/RM > — The compound key of memory and recall, short-time press (press time <1.5s) to save the measuring data, depress (press time > 2 s) to recall the saved measuring value.3.3. The Storage, Recall and Elimination of the Measuring Information:3.3.1. Store the measuring information:(a) In the measuring mode, short press < M+/RM > key, LCD will display “ M+ ” icon and storage serial number, and meanwhile memory all the measuring information including time, date, serial number, measuring data, unit, temperature, temperature compensation state and so on. The meter can store 300 group data when in the mode      and      , can store 600 group data in all.(b) When setting the timing measuring function, “    ” icon will appear on the LCD, and the meter will measure according to the time intervals set, and stores the measuring information at the same time;3.3.2. Recall measuring information:(a) Under the measuring mode, depress the < M+/RM > key, the meter will recall the last stored information, and the storage serial number and “ RM ” icon will appear in the lower right corner of the LCD, and the complete measuring information, measuring time and date will be displayed alternatively on the upper right corner. Again press < ▼ > or < ▲ > key, the meter will recall all the measuring information in turn, depress < ▼ > or < ▲ > key to rapidly check the measuring information under other serial number;(b) In the recalling mode (there are “ RM ” icon and storage serial number in the lower right corner of the LCD), press < ENTER > key to return to the measuring mode.3.3.3. Eliminate the stored measuring information:In the recalling mode, depress the < M+RM > key for 5s, “      ” icon will display on the LCD for 2s. It means the internal storage has been eliminated. Then return to measuring mode.3.4. RS-232 Communication:3.4.1. This meter adopts MP512 communication software which can achieve RS-232 communication function. The requirements for computer of this application software are: PC can stable operate the Windows XP operating system (Microsoft Excel 2000 or much higher version has been installed in PC). According to different selection of resolution setting (1280 x 1024 or 1280 x 800) to install MP512 communication software by following the indications. Open the MP512 communication software and connect meter, the LCD will display “     ” RS-232 communication icon. Meanwhile all the stored information including measuring value, measuring unit, temperature, temperature compensation state (ATC or MTC) and the last calibration information (calibration time, date and solution) will be transmitted to the computer.3.4.2. Again press < M+/RM > key after meter being connected with computer, or  timing measuring function has been set, all the measuring information will be transmitted to computer through RS-232 and won’t be stored in meter. And there will also display a curve graph of measurement value changing with time on the interface of computer.3.4.3. User can do operation such as analyzing, counting or printing etc. for all measuring information in “Microsoft Excel” file through the key “Lead out” in the interface of computer.3.5. Sockets:3.5.1. REF — Reference electrode socket3.5.2. pH/mV — pH and ORP electrode socket (BNC)3.5.3. TEMP — Temperature electrode socket (RCA microphone socket)3.5.4. RS232 — RS232 communication connector socket3.5.5. DC9V — DC9V power socket, Ф2.5, inner “+ ”outer “ - ”.4. pH Measurement:4.1. Preparation Work:4.1.1. Switch in power, press <    > key to turn on.4.1.2. Short-press < MODE > key to switch to      mode.4.1.3. Install electrode holder and debug.4.1.4. Insert the pH electrode into the meter’s socket.4.2. Electrode Calibration:4.2.1. Press < CAL > key to enter into calibration mode, LCD displays the twinkling “         ”, indicates to enter into the first point calibration.4.2.2. Wash the pH electrode in purified water and dry it, then immerge it into the pH7.00 buffer solution, rock the electrode holder and then still, waiting for the data to be stable and “      ” icon appears, then again press < CAL > key, the LCD displays a twinkling 7.000pH, calibration finish after several seconds and appear a stable pH value and a twinkling “         ”, indicates the first point calibration has been finished and meter enters into the second point calibration.4.2.3. Wash the pH electrode in purified water and dry it, then immerge it into the pH4.00 buffer solution, rock the electrode holder and then still, waiting for the data to be stable and “      ” icon appears, then again press < CAL > key, the LCD displays a twinkling 4.005pH, calibration finish after several seconds and appear a stable pH value and a twinkling “         ”, indicates the second point calibration has been finished and meter enters into the third point calibration.4.2.4. Wash the pH electrode in purified water and dry it, then immerge it into the pH10.01 buffer solution, rock the electrode holder and then still, waiting for the data to be stable and “      ” icon appears, then again press < CAL > key, the LCD displays a twinkling 10.012pH, calibration finish after several seconds and appear a stable pH and “          ” three calibration indication icon, see picture (4-1). Indicates the three-point calibration has been finished and meter enters into measuring mode.4.2.5. Note:(a) This meter can adopt a random one-point, two-point or three-point automatic calibration, after finishing the first point calibration (see item 4.2.2.),  press < ENTER > key to confirm and enter into measuring mode. The indication icon “     ” for one-point calibration will appear in the lower left corner of the LCD. When the measuring accuracy is ≤±0.1pH, user just need to choose one kind buffer solution to take one-point calibration according to the measuring range.(b) After the second point calibration, (see item 4.2.3.), press < ENTER > key to confirm two-point calibration measuring mode. The indication icon “       ” for two-point calibration will appear in the lower left corner of the LCD. User can choose pH4.00 and pH7.00 to calibrate if the measurement is just within the acidity range and choose pH7.00 and pH10.01 to calibrate if measuring just within the alkalinity range.(c) It is better to choose three-point calibration so as to reach a more accurate measurement if the measuring range is wide or, if the electrode has been used for long or has ageing phenomenon. As to the new pH electrode, it must do three-point calibration to keep the unanimity of the meter’s slope adjustment with the pH electrode.4.3. Sample Test:Wash the pH electrode and dry it, then immerge it into the sample solution, rock the electrode holder and still, then take the reading after the “      ” icon appears on the LCD, it is the pH value.Note: (a) The closer the temperature of the sample solution and the calibration solution are, the more accurate the measuring value is. This is called the pH equal temperature measuring theory.(b) Meter equips with 2pcs of pH electrodes, for routine use, suggest to use the 201T-M plastic pH/ATC three-in-one combination electrode, and suggest to use 2503-C glass pH combination electrode for high accuracy measuring, or solution which is weaker ionic strength, high viscosity and feculent, and colloidal solution.4.4. Parameter Setting:4.4.1. pH measuring parameter setting schedule (Chart (4-1))Chart (4-1)Prompt MarkParameter Setting ItemsCodeParametersP1pH buffer solution series selectionUSA(Europe & U.S.A series)NIS (NIST series)CH (China series)CUS (Self-defined)P2pH temperature compensation setting for purified water OFF-On (shut-set)P3pH temperature compensation setting for ammonia added purified waterOFF-On (shut-set)P4Time for timing measuring setting0 to 99 minutesP5Temperature unit setting℃ ℉P6Date settingDateMonth / Day / YearP7Time settingTimeHour / MinuteP8Restore to producer settingOFF-On ( shut-set)4.4.2. pH buffer solution series selection (P1)(a) Depress < MODE > key, meter enters into P1 mode: see picture (4-2).(b) Press < ▲ > or < ▼ > key to choose buffer solution series:(Europe & U.S.A series) — 1.679, 4.005, 7.000, 10.012 and 12.454 pH(NIST series) — 1.679, 4.006, 6.865, 9.180 and 12.454 pH(China series) — 1.680, 4.003, 6.864, 9.182 and 12.460 pH(c) Press < MODE> key enters into next parameter setting or press < ENTER > key to conform and return to measuring mode.(d) The producer setting is USA (Europe & U.S.A series).4.4.3. pH buffer solution “self-defined” setting:For some special calibration solution, user can set it in the “self-defined” mode, but please pay special attention that the “self-defined” parameters are the values under some fixed temperature, and meter must be calibrated under the same temperature, otherwise there might be a biggish error. The following are the steps of setting the “self-defined”:(a) Depress < MODE > key to enter into P1, press < ▲ > or < ▼ > key to choose the solution series as the “      ”, then again press < CAL > key to enter into the setting interface, show as picture (4-3), the upper right corner “        ” refers to the setting of the first calibration point.(b) Press < UNIT > key, the number will in turn move to the right and flash, press < ▲ > or < ▼ > when the number flashing to alter the number, and set number follow this operation. Picture (4-3) is the whole procedure for one- point, two-point and three-point calibration setting.Note: If choose “      ” setting, then “      ” icon will appear on the upper right corner of LCD (time display part).4.4.4. Purified water pH temperature compensation setting (P2)(a) Short press < MODE > in the mode P1, meter enters into mode P2, see picture (4-4).(b) Press < ▲ > or < ▼ > key to choose “    ” (purified water pH temperature compensation setting) or “      ” (shut).(c) Press < MODE > key enters into next parameter setting or press < ENTER > key to conform and return to measuring mode.(d) The producer setting is “ OFF ”.Note:There will appear“       ” icon in the upper right corner of the LCD if purified water temperature function was set.4.4.5. Ammonia added purified water pH temperature compensation setting (p3)(a) Short press < MODE > in mode P2 to enter into mode P3, see picture (4-5),(b) Press < ▲ > or < ▼ > key to choose “     ”(ammonia added purified water pH temperature compensation setting)or “      ” (shut).(c) Press < MODE > key enters into next parameter setting or press < ENTER > key to conform and return to measuring mode.(d) The producer setting is “ OFF ”.Note:If set the ammonia purified water pH temperature compensation function, there will appear“        ”icon in the upper right corner of the LCD during the measuring mode.4.4.6. Time for Timing measuring setting (P4)(a) Short press < MODE > key in mode P3 to enter into mode P4, See picture (4-6).(b) Press < UNIT > key, the “   ” will move rightward in turn and flash. Press < ▲ > or < ▼ > to alter the number.(c) Press < MODE > key enters into next parameter setting or press < ENTER > key to conform and return to measuring mode.(d) The producer setting is “ 0 ” second.Note: in the form “        ”, the number in the front of “ :” is minute, and the maximum setting is 99, in the back of “ :” is second, the maximum setting is 59. After setting the timing measurement mode, LCD will display the “     ” icon.4.4.7. Temperature unit ℃/℉ setting (P5)(a) Short press < MODE > key in mode P4 to enter into mode P5, see picture (4-7).(b) Press < ▲ > or < ▼ > key to choose temperature unit: ℃or℉.(c) Press < MODE > key enters into next parameter setting or press < ENTER > key to conform and return to measuring mode.4.4.8. Date setting (P6)(a) Short press < MODE > key in mode P5 to enter into mode P6, see picture (4-8).(b) Press < UNIT > key, the number will move rightward and flash, press < ▲ > or < ▼ > key to alter the number. The upper right is month-day and the lower right is year.(c) Press < MODE > key enters into next parameter setting or press < ENTER > key to conform and return to measuring mode.4.4.9. Time setting (P7)(a) Short press < MODE > key in mode P6 to enter into mode P7, see picture (4-9).(b) Press < UNIT > key, the number will move rightward and flash, press < ▲ > or < ▼ > key to alter the number.(c) Press < MODE > key enters into next parameter setting or press < ENTER > key to conform and return to measuring mode.4.4.10. Restore to producer setting (P8)(a) Short press < MODE > key in mode P7 to enter into mode P8, see picture (4-10).(b) Press < ▲ > key to choose “     ”, means that all the pH measuring parameters have been restored to the producer setting mode, and return to measuring mode after 2 seconds.Special Note: When the parameter setting is compatible with the producer setting, the pH measuring interface displays as picture (4-1), time is displayed in the upper right corner of the LCD. When the some parts of parameter setting are not compatible with the producer setting, the code icon will appear on the upper right corner of LCD. When setting more than two parameters with code icon, LCD will just display one of the code icons. User should enter into the parameter setting interface to view the information or to restore the meter to the producer setting mode, and then reset the needed parameters.4.5. Considerations:4.5.1. Calibration times of meter rely on the sample, electrode performance and required accuracy. For high accurate measurement (≤±0.02pH), which should be calibrated immediately with high accurate standard buffer solution, for general accuracy measuring (≥±0.1pH), which can be used almost one week or long time once be calibrated.4.5.2. The meter must be recalibrated in the following situations:(a) New or unused electrode for a long time;(b) After measuring acid (pH<2) or alkaline (pH>12) solution;(c) After measuring solution which contains fluoride and concentrated organic solution;(d) The solution’s temperature is much different with calibration temperature.4.5.3. If user do not want to use the temperature electrode, they can press < ▲ > or < ▼ > to adjust temperature to do manual temperature compensation.4.5.4. The soaking solution in the protecting bottle in front of pH electrode is to keep the glass bulb and junction activating. Loose the capsule, pull out the electrode and wash it in purified water before measuring. Insert the electrode and screw tight the capsule after measuring to prevent the solution from leaking. If the soaking solution is turbid or moldy, please clean and change new one at once.4.5.5. The preparation of the soaking solution: take 25g analytic pure KCl, dissolve in purified water and dilute to 100mL. Electrode must avoid soaking in purified water, protein solution and acid fluoride solution for a long time as well avoid getting touching with organic silicon lipidic matters.4.5.6. To calibrate the meter with the given pH value buffer solution, the pH value of the standard buffer solution must be reliable so as to improve the measurement accuracy. Buffer solution should be changed in time after many times using.4.5.7. Always keep the meter clean and dry, especially for the socket of meter and electrode, otherwise it may lead to an inaccurate measurement or invalidity. To clean and dry it with medical cotton and non-water alcohol if there are any dirty.4.5.8. The sensitive glass bulb in the front of combination electrode should not be touched with hard things, any broken and hair will make the electrode invalidity. Before and after measuring, the electrode should be washed with purified water, and dry electrode after washing, don’t clean glass bulb with tissue for it will effect stability of electrode potential and enlarge response time. The electrode should be washed many times for removing the sample stuck on the electrode, after measuring sticky sample or wash with suitable solvent then clean the solvent with purified water.4.5.9. An electrode used for a long time, or measured solution which contains a polluting solute easily for the sensitive bulb, or a substance resulting in jam at the junction, the electrode will be getting passivated, its sensitivity grade will decrease and its response is getting slow, the reading are not correct. It could adopt the following method for various cases:(a) The glass bulb is contaminated and aging: put the electrode into 0.1mol/L dilute hydrochloric acid (preparation: diluted 9mL hydrochloric acid to 1000mL with purified water) for 24h. Rinse it with purified water, then dipped it into the electrode dipping solution for 24h. If the passivation is serious, then user can also put the end of electrode into 4% HF (hydrofluoric acid) solution for 3 to 5 seconds, rinsing it with purified water, and dipped it in the electrode soaking solution for 24h to renew it.(b) Clean for contaminated glass bulb and junction: (FYI)Contamination                         AbluentInorganic metal oxide               diluted acid less than 1mol/LOrganic lipidic matter              dilute washing (weak alkaline)Resin macromolecule matter           dilute alcohol, acetone, etherProteinic haematocyte sediment  Acidic enzymatic solution (such as dried yeast)Kinds of paint                   dilute bleacher, peroxide4.5.10. pH electrode using period is about 1 year, but its life will be shortened if using condition is poor or incorrect maintenance. So it should be replaced immediately after electrode become aging or invalid.4.6. The Self-diagnose Information:When using, there might appear the following icons. This is the meter’s self-diagnosis information, which can help to know some information about the meter or the electrode when using:4.6.1. The still icon “          ” pH or the icon “        ” pH — this is the icon appeared when the value has surpassed the measuring range. There will also appear such signs when the electrode is not well connected with the meter or when the electrode is not immerged into the solution. This is a normal phenomenon.4.6.2. “      ” — Electrode zero potential to be exceeded  (<-60mV or >60mV)4.6.3. “       ” — Electrode slope to be exceeded (< 85% or >105%)When appear “        ” or “        ”, the meter will work abnormally, please take the following check:(a) Check the electrode bulb if has any bubbles, if has, please shake it hardly.(b) Check the quality of buffer solution, if it goes bad or the value has biggish error.(c) Restore meter to the producer setting mode (for details see P17 item 4.4.10), then recalibrate it.If it still can not recover the normal state after the above checks, please replace a new pH electrode.5.  mV and ORP Measurement:5.1. Sample Test:5.1.1. Press <    > to electrify meter, press < MODE > to switch to      mode, then press < UNIT > key to choose      →      →      ;(a)       — This is the measuring mode of electrode potential. mV value   and the temperature will display at the same time;(b)       — This is the measuring mode of ORP electrode. ORP measurement has no temperature compensation, so there is no temperature displayed in this mode;(c)       — This is a special ORP measuring mode. It can show the ORP potential against to the standard hydrogen electrode, EH  value is related to potential of reference electrode. The reference electrode potential which be set by producer is 204.6mV (3.5mol/L KCl, Ag/AgCl the standard potential of reference electrode). It is assorted with the ORP electrode supplied by our factory. If user want to choose other ORP electrode, please check the standard potential value according to its specifications and set the parameters in the meter’s parameter setting P1 (see P24 item 5.3.2.);Note: — ORP is the abbreviation of “ Oxidation-Reduction Potential ”, signify the Oxidation-Reduction Potential of the solution, ORP is the index about the ability the Oxidation-Reduction Potential of the aqueous solution, its unit is mV.5.1.2. Connect ORP electrode or ion electrode, immerge it into the sample solution, slowly stir and then still. When there appear a “     ” and a stable reading, that is the ORP value or the potential of the ion electrode.5.1.3. If it is a combination ORP or ion electrode, user just need to insert it into “pH/mV ” socket, and if the electrode is other type, the user should also need to choose a proper reference electrode to connect into the “ REF ” socket and to measure with both of the two electrodes at the same time.5.2. Considerations:5.2.1. The meter does not need to be calibrated when do ORP measurement. But if it is interrogative for the ORP electrode quality or the measuring result, it’s better to measure the mV value with the standard solution to identify the ORP electrode or to see if meter is accurate or not.Our company can offer the following ORP standard solution: 222mV(25℃)±15mV ORP standard solution (warranty 1 year), the inner solution of reference electrode is 3.5mol/L KCl.Chart (5-1)℃     mV℃     mV℃     mV℃     mV10     24220     22730     21538     20515     23525     22235     20940     2015.2.2. The clean and activation of ORP electrode: the surface of the platinum will be polluted after the ORP electrode being used for a long time, which will lead to inaccurate measurement and slow response. User can adopt the following method for activation:For mineral pollution, immerge the electrode into 0.1mol/L dilute hydrochloric acid for 30 minutes, then wash with purified water, and then immerge it into the electrode soaking solution for 6 hours before using.For the organic oil stain pollution, wash the platinum surface with detergent, and then immerge it into the electrode soaking solution for 6 hours before using.For the seriously polluted platinum with oxidized membrane, polish the surface with toothpaste, then wash it in purified water, and then immerge it into the electrode soaking solution for 6 hours before using.5.3. Parameter Setting:5.3.1. mV and ORP measurement parameter setting schedule (chart (5-2))Chart (5-2)Prompt MarkParameter Setting ItemsCodeParametersP1Reference electrode potential setting0 to 999.9mVP2Time for timing measuring setting0 to 99 minutesP3Restore to producer settingOFF-On (shut-set)5.3.2. Reference electrode potential setting:(a) Depress < MODE > key in the mode      ,       or      to enter into mode P1 , see picture (5-1).(b) Press < UNIT > key, the number will move rightward in turn and twinkle, press < ▲ > or  < ▼ > to alter the number when the number twinkling.(c) Press < MODE > key enters into next parameter setting or press < ENTER > key to conform and return to measuring mode.(d) The producer setting is 204.6mV.Note: If has been set a potential value different from the producer setting value, there will appear “      ” in the upper right corner of the LCD in the measuring mode      .5.3.3. Time for timing measuring setting (P2):   Please see P15 item 4.4.6.5.3.4. Restore to producer setting (P3):Please see P17 item 4.4.10.6. Meter’s Complete Kit:6.1. Model MP512 Precision pH meter6.2. Model 602 flexible electrode holder6.3. 201T-M plastic pH/ATC three-in-one combination electrode6.4. 2503-C glass pH combination electrode6.5. MP500 temperature electrode6.6. pH standard buffer solution(pH 4.00,7.00,10.01/50mL)     1 bottle for each6.7. 9V power adapter6.8. RS-232 communication cable6.9. MP512 communication software CD6.10. Operation manual6.11. Brief operation instruction7.  Warranty:7.1. We warrant this meter to be free of charge maintain, replace the parts or products under normal using circumstances, from purchased time within one year caused by manufacturing bad and unable to work.7.2. Attached pH electrode is not belong to this warrant range, besides the temperature electrode. But, if the newly purchased electrode went wrong without using, it’s free of charge to maintain and replace.7.3. The above warranty is not apply to defects resulting from action of user such as misuse, improper wiring, operation outside of specification, improper maintenance or repair, or unauthorized modification.Chart І Meter Parameter Setting ScheduleModelPrompt MarkParameter Setting ItemsCodeParameterpHP1pH buffer solution series selectionUSA (Europe & U.S.A. series)NIS (NIST series)CH (China series)CUS (Self-defined)P2pH temperature compensation setting for purified waterOFF-On (shut-set)P3pH temperature compensation setting for purified water added with ammoniaOFF-On (shut-set)P4Time for timing measuring setting0 to 99 minutesP5Temperature unit setting℃ ℉P6Date settingDateMonth / Day / YearP7Time settingTimeHour / MinuteP8Restore to producer settingOFF-On (shut-set)mVP1Potential of reference electrode setting0 to 999.9mVP2Time for timing measuring setting0 to 99 minutesP3Restore to producer settingOFF-On (shut-set)Chart Ⅱ Meter Restore to Producer Setting Schedule ModePrompt MarkParameter Setting ItemsProducer Setting ContentCode  pHP2pH temperature compensation setting for purified waterOFFP3pH temperature compensation setting for purified water added with ammoniaOFFP4Time for timing measuring setting0 secondmVP1Potential of reference electrode setting204.6mVP2Time for timing measuring setting0 secondChart Ⅲ Code Icon and Abbreviation ScheduleCode and AbbreviationEnglishExplanationSolutionStandard solutionChinaChina series standardUSAEurope & U.S.A series standardNISTNIST series standardCustomSelf-defined solutionPure-1pH temperature compensation setting for purified waterPure-2pH temperature compensation setting for purified water added with ammoniaVolt ReferencePotential of reference electrode settingEndCalibrationOxidation-Reduction Potential

MP522台式pH/电导率仪(精密型)——使用说明书

MP522台式pH/电导率仪(精密型)适用于科学研究、质量控制、生物术、精细化工、酸碱滴定等领域的高精度pH和电导率测量。