Operating manual Lab 870 69 25 pH 92 °C La b8 70 Laboratory pH meter with automatic sensor recognition ba75555e04 11/2009
Lab 870 Accuracy when going to press Warranty The use of advanced technology and the high quality standard of our instruments are the result of continuous development. This may result in differences between this operating manual and your instrument. Also, we cannot guarantee that there are absolutely no errors in this manual. Therefore, we are sure you will understand that we cannot accept any legal claims resulting from the data, figures or descriptions.
Lab 870 KONFORMITÄTSERKLÄRUNG DECLARATION OF CONFORMITY DÉCLARATION DE CONFORMITÉ Wir erklären in alleiniger Verantwortung, dass das Produkt We declare under our sole responsibility that the product Nous déclarons sous notre seule responsabilité que le produit pH-Meter Lab 870 pH meter Lab 870 pH-mètre Lab 870 auf das sich diese Erklärung bezieht, übereinstimmt mit den Angaben im Kapitel to which this declaration relates is in conformity with the specifications in the chapter auquel se réfère cett
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Lab 870 Contents Lab 870 - Contents 1 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 1.1 1.2 1.3 1.4 2 Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 2.1 2.2 3 4.3 4.4 4.5 4.6 4.7 11/2009 Scope of delivery. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 Initial commissioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Contents Lab 870 4.7.2 5 Maintenance, cleaning, disposal . . . . . . . . . . . . . . . . . 51 5.1 5.2 5.3 5.4 Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.1.1 Replacing the batteries . . . . . . . . . . . . . . . . . . . . Cleaning. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Packing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Disposal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Lab 870 Overview 1 Overview The compact Lab 870 precision pH meter enables you to perform pH measurements rapidly and reliably. The Lab 870 provides the maximum degree of operating comfort, reliability and measuring certainty for all applications. The proven calibration procedures and special stability control function (SC) support your work with the pH meter.
Overview Lab 870 1.1 Keypad CAL MODE SC In this operating manual, keys are indicated by brackets <..> . The key symbol (e.g. ) indicates a keystroke in this operating manual.
Lab 870 Overview 1.2 Display Status display indicator SET U pH BUFFER 18888 Time Baud No. Day.
Overview Lab 870 1.3 Socket field 1 2 3 4 5 6 Connectors: 1 pH electrode 2 Reference electrode 3 Temperature sensor 4 USB interface 5 Power pack 6 RS 232 interface CAUTION Only connect sensors to the meter that cannot return any voltages or currents that are not allowed (> SELV and > current circuit with current limiting). Almost all sensors - in particular SI Analytics GmbH sensors fulfill these conditions.
Lab 870 Overview 1.
Overview Lab 870 ID sensors SI Analytics GmbH ID sensors support the automatic sensor recognition. "ID" is added to the designation of these sensors, e.g. electrode BlueLine 14 pH ID. Note Information on available ID sensors is given on the Internet or directly by SI Analytics. ID sensors connected to the Lab 870 meter are identified by the ID sensor symbol on the display of the meter.
Lab 870 Safety 2 Safety This operating manual contains basic instructions that you must follow during the commissioning, operation and maintenance of the meter. Consequently, all responsible personnel must read this operating manual before working with the meter. The operating manual must always be available within the vicinity of the instrument. Target group Safety instructions The meter was developed for work in the laboratory.
Safety Lab 870 2.1 Authorized use This meter is authorized exclusively for pH and ORP measurements in the laboratory. The technical specifications as given in chapter 7 TECHNICAL DATA (page 57) must be observed. Only the operation and running of the meter according to the instructions given in this operating manual is authorized. Any other use is considered unauthorized. 2.
Lab 870 Safety Safe operation If safe operation is no longer possible, the instrument must be taken out of service and secured against inadvertent operation! Safe operation is no longer possible if the meter: z has been damaged in transport z has been stored under adverse conditions for a lengthy period of time z is visibly damaged z no longer operates as described in this manual. If you are in any doubt, please contact the supplier of the instrument.
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Lab 870 Commissioning 3 Commissioning 3.1 Scope of delivery z Lab 870 laboratory meter z Power pack z 4 batteries 1.5 V Mignon type AA z USB cable with A plug and B plug z Transparent cover z Operating manual z CD-ROM with USB driver 3.2 Initial commissioning Perform the following activities: z Insert batteries z Switch on the meter z Set the date and time z Connect the power pack (for line power operation only).
Commissioning Lab 870 1 CAUTION Make sure that the poles of the batteries are the right way round. The ± signs on the batteries must correspond to the ± signs in the battery compartment. Only use leakproof alkaline manganese batteries. Switching on the meter Setting the date and time Connecting the power pack 1 Switch on the meter with . A display test is briefly displayed. 2 See page 42. You can either operate the measuring instrument with batteries or with the plug-in power supply.
Lab 870 Commissioning Note You can carry out measurements without the power pack.
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Lab 870 Operation 4 Operation 4.1 Switching on the meter 1 Place the meter on a flat surface and protect it from intense light and heat. 2 Press the key. A display test is briefly displayed. Subsequently, the meter switches to the measuring mode (measured value display). Note The meter has an energy saving feature to avoid unnecessary battery depletion during battery operation.
Operation Lab 870 4.2 General operating principles This section contains basic information on the operation of the Lab 870. 4.2.1 Operating modes The instrument has the following operating modes: z Measurement The display indicates the measurement data in the measured value display z Calibration The display guides you thru a calibration procedure with calibration information z Transmitting data The meter transmits measuring data and calibration records to a serial interface automatically or manually.
Lab 870 Operation 4.3 Preparatory activities Measuring Perform the following preparatory activities when you want to measure: 1 Connect an electrode to the meter. 2 Adjust the temperature of the buffer solutions or test solutions, or measure the current temperature, if you measure without a temperature sensor. 3 Calibrate or check the meter with the electrode. 4 Select the measured parameter with . Note Incorrect calibration of pH electrodes leads to incorrect measured values.
Operation Lab 870 4.3.1 Measuring the pH value 1 Perform the preparatory activities according to page 23. 2 Immerse the pH electrode in the test sample. 3 Using , scroll as necessary until the measured parameter pH is displayed. pH 6992 248 Stability control SC (drift control) TP °C The stability control function (drift control) checks the stability of the measurement signal. The stability has a considerable effect on the reproducibility of the measured value.
Lab 870 Operation 4.3.2 Measuring the ORP The meter can, in conjunction with an ORP electrode, measure the ORP (mV) of a solution. 1 Perform the preparatory activities according to page 23. 2 Immerse the ORP electrode in the test sample. 3 If necessary, call up the measured parameter U with . 4 Wait for a stable measured value. U 486 213 mV TP °C Note ORP electrodes are not calibrated. However, you can check ORP electrodes using a test solution.
Operation Lab 870 4.4 Why calibrate? When do you have to calibrate? Buffer sets for calibration 26 Calibration pH electrodes age. This changes the zero point (asymmetry) and slope of the pH electrode. As a result, an inexact measured value is displayed. Calibration determines the current values of the zero point and slope of the electrode and stores them. Thus, you should calibrate at regular intervals. For non-ID sensors, the calibration data is stored in the meter.
Lab 870 Operation No. Buffer set* 7 Mettler Toledo USA * 1.679 4.003 7.002 10.013 25 °C 8 Mettler Toledo TEC * 1.995 4.005 7.002 9.208 25 °C 9 Fisher * 2.007 4.002 7.004 10.002 25 °C 10 Fluka BS * 4.006 6.984 8.957 25 °C 11 Radiometer * 1.678 4.005 7.000 9.180 25 °C 12 Baker * 4.006 6.991 10.008 25 °C 13 Metrohm * 3.996 7.003 8.999 25 °C 14 Beckman * 4.005 7.005 10.013 25 °C 15 Hamilton Duracal * 4.005 7.002 10.013 25 °C 16 Precisa * 3.996 7.003 8.
Operation Lab 870 Note The buffer set is selected in the menu for measurement settings (see page 44). A list of the stored buffer sets can be downloaded to the interface (Set 1 ... 16) with while selecting the buffer set in the menu for measurement settings. _ Calibration points Calibration can be performed using one, two or three buffer solutions in any order (single-point, two-point or three-point calibration).
Lab 870 Operation Displaying the calibration data You can display the data of the last calibration (see page 35). Subsequently, you can transmit the displayed calibration data to the interface, e. g. to a printer or PC, with the key. _ Note The calibration record is automatically transmitted to the interface after calibrating. Sample record: 16.09.2005 08:53:54 Lab 870 02320025 Calibration pH Cal time: 16.09.2005 08:22:14 Cal interval: 14 d AutoCal Buffer 1 2.000 Buffer 2 4.010 Buffer 3 7.
Operation Lab 870 CalClock Calibration record Zero point [mV] Slope [mV/pH] < -30 or > 30 ... -62 or ... -50 Clean the electrode according to the sensor operating manual CalError CalError Eliminate the error according to page 53 Preparatory activities 30 1 Switch on the meter with . 2 Connect a pH electrode to the meter. 3 Keep the buffer solutions ready.
Lab 870 Operation 4.4.1 Calibration interval (Int.C) The calibration interval and calibration evaluation are indicated on the display as the CalClock. CalClock The remaining time of the calibration interval is indicated by the segmented ring around the calibration evaluation. This segmented ring reminds you to calibrate regularly. After the specified calibration interval (Int.C) has expired, the outer ring of the CalClock flashes. It is still possible to measure.
Operation Lab 870 4.4.2 Automatic calibration (AutoCal) For this procedure, use one, two or three buffer solutions of the selected buffer set in any order. Note The steps 2, 6 and 10 are not necessary if you use a temperature sensor. 1 Start the calibration with . The number of the specified buffer set is displayed (SET 1 ... 16). For ID sensors, the number of the buffer set used last is displayed. The first buffer (BUFFER 1) of the buffer set (SET_x) is requested.
Lab 870 Operation SET 1 AutoCal pH BUFFER 2 258 TP °C Note Here you can cancel the calibration procedure with . This corresponds to a single-point calibration. The value of the zero point (Asy) is displayed for 10 seconds, then the value of the slope (Slo) is displayed for 10 seconds. After this the meter switches to the measuring mode. Continue with two-point calibration 5 Thoroughly rinse the electrode with distilled water.
Operation Lab 870 Note Here you can cancel the calibration procedure with . This corresponds to a two-point calibration. The value of the zero point (Asy) is displayed for 10 seconds, then the value of the slope (Slo) is displayed for 10 seconds. After this the meter switches to the measuring mode. The ID sensor symbol flashes while the calibration data is being stored in the sensor.
Lab 870 Operation Note While the zero point (ASY) is being displayed, you can change the unit of the zero point with <▲><▼> . While the slope (SLO) is being displayed, you can change the unit of the slope with <▲><▼> . The % display refers to the Nernst slope of 59.2 mV/pH at 25° C (100 x determined slope/Nernst slope). The unit of zero point and slope can be permanently changed in the measurement settings (see page 44). 4.4.
Operation Lab 870 z press <▲><▼> to switch over the unit of the zero point (Asy) (while the zero point is being displayed) z press <▲><▼> to switch over the unit of the slope (Slo) (while the slope is being displayed) Download to display via calibration menu 1 _ Press to display the calibration data. The following data is displayed consecutively for 10 seconds each: date, zero point, slope.
Lab 870 Operation 4.5 Transmitting data The meter has two interfaces: z RS232 interface (serial port) z USB interface (device) Via both interfaces, you can transmit data to a PC and update the meter software. The meter is supplied with power via the USB interface. The RS232 interface enables to transmit data to an external printer. Note The relevant interface cable has to be connected if you want to download data to an interface (USB or RS232).
Operation Lab 870 4.5.1 Options for data transmission Via the USB interface you can transmit data to a PC. Via the RS 232 interface, you can transmit data to a PC or an external printer. The following table shows which data are transmitted to the interface in which way: Data Control Operation / description Current measured values Manual z With . Automatic, at intervals z With . Then you can set the transmission interval (Int.2) (page 39).
Lab 870 Operation 4.5.2 Automatically downloading measurement datasets at intervals In order to automatically download to the interface measured values at certain time intervals, set the download interval (Int.2). Setting the download interval The default setting for the download interval (Int 2) is OFF. To switch the function on, set an interval (5 s, 10 s, 20 s, 30 s, 1 min, 2 min, 5 min, 10 min, 20 min, 30 min, 60 min): _> to open the setting of the Int.2 interval.
Operation Lab 870 Socket assignment (RS232) 3 4 2 6 5 1 RS 232 4.5.5 1* 2 RxD 3 TxD 4* 5 SGnd 6 CTS * not used USB interface (device) Connect the interface to the PC via the supplied Z875 USB cable. The data output automatically switches to USB. The RS232 interface is deactivated.
Lab 870 Operation 4.6 Settings You can adapt the meter to your individual requirements. The settings are done in the following menus: z System settings () – Baud rate (Baud) – Switch-off interval (t.Off) – Date (Day.Month) – Date (Year) – Time (Time) z Settings for calibration and measurement () – Number of the buffer set for pH calibration (Set 1 ...
Operation Lab 870 4.6.1 System settings The default setting is printed in bold. Baud rate (Baud) 1200, 2400, 4800, 9600 Switch-off interval (t.Off) 10, 20, 30, 40, 50 min, 1, 2, 3, 4, 5, 10, 15, 20, 24 h Date (Day.Month) Any Date (Year) Any Time (Time) Any 1 _>. Open the menu for system settings with <▼> . 3 Confirm with . t.
Lab 870 Operation 4 Set the switch-off interval with <▲><▼>. 5 Confirm with . Day.Month, the setting of the date is displayed. The day display flashes. Date and time Day.Month ba75555e04 11/2009 300 3 6 Set the date of the current day with <▲><▼> . 7 Confirm with . The month display flashes. 8 Set the current month with <▲><▼> . 9 Confirm with . Year, the setting of the year is displayed. 10 Set the year with <▲><▼> . 11 Confirm with .
Operation Lab 870 4.6.2 Measurement settings These settings apply to calibration and measurement (the default setting is printed in bold). Buffer set for pH calibration (SET) Number of the buffer set for pH calibration (SET) 1 ... 16 Display during calibration (BUFFER) pH (buffer nominal value), U (electrode voltage) Unit of the value for the slope (SLO) %, mV/pH Unit of the value for the zero point (ASY) pH, mV Resolution (rES) HI (0.001), Lo (0.
Lab 870 Operation Display during calibration (bUFF) pH b UF F AutoCal pH 4 Using <▲><▼>, select the display during calibration pH or U. 5 Confirm with . SLO, the unit of the value for the slope (mV/pH or %) is displayed. Unit of the value for the slope (SLO) pH SL O ba75555e04 11/2009 mV/pH 6 Using <▲><▼>, select the unit for the slope. 7 Confirm with . ASY, the unit of the value for the zero point (mV or pH) is displayed.
Operation Lab 870 Unit of the value for the zero point (ASY) pH ASY mV 8 Using <▲><▼>, select the unit for the zero point. 9 Confirm with . rES, the setting of the resolution is displayed. Resolution (rES) pH res HI 46 10 Using <▲><▼>, toggle between Hi (0.001)and Lo (0.01). 11 Confirm with . Unit, the setting of the unit of the temperature value is displayed.
Lab 870 Operation Temperature unit (Unit) Unit oC Using <▲><▼>, toggle between °C and °F. 13 Confirm with . Int.C, the setting of the calibration interval is displayed. Time INT C AutoCal 11/2009 °C 12 Calibration interval (Int.C) ba75555e04 TP d 14 14 Set the interval with <▲><▼>. 15 Confirm with . The measurement settings are completed. The meter switches to the measuring mode.
Operation Lab 870 4.6.3 Interval for automatic data transmission The interval for automatic data transmission serves to transmit the current measurement dataset to the interface at the specified interval. Data transmission interval (Int.2) 1 OFF, 5 s, 10 s, 20 s, 30 s, 1 min, 2 min, 5 min, 10 min, 20 min, 30 min, 60 min _ Press to open the setting for the transmission interval. Int.2, the setting of the transmission interval is displayed.
Lab 870 Operation 4.7 Reset 4.7.1 Resetting calibration values This function resets the calibration values to the default condition. All other meter settings are retained. Calibration values in the default condition Zero point pH 7.000 (0 mV) Slope 100 % (-59.2 mV/pH) Note The measuring system is not calibrated after a reset. Before measuring recalibrate the meter. Resetting calibration values 1 _ Press to open the menu for the reset of the calibration data. Init.C is displayed.
Operation Lab 870 4.7.2 Resetting all meter settings This function resets to the default condition all meter settings including the calibration values. The corresponding values are given on the following pages: Resetting the meter settings Calibration values page 49 System settings page 42 Measurement settings page 44 1 Switch on the meter with . The display test appears briefly on the display.
Lab 870 Maintenance, cleaning, disposal 5 Maintenance, cleaning, disposal 5.1 Maintenance The only maintenance activity required is replacing the batteries. Note For maintenance of the electrodes refer to the relevant operating manuals. 5.1.1 Replacing the batteries 1 Open the battery compartment (1) on the underside of the meter. 2 Remove the four batteries from the battery compartment. 3 Place four new batteries (type Mignon AA) in the battery compartment.
Maintenance, cleaning, disposal Lab 870 5.2 Cleaning Occasionally wipe the outside of the meter with a damp, lint-free cloth. Disinfect the housing with isopropanol as required. CAUTION The housing is made of synthetic material (ABS). Thus, avoid contact with acetone or similar detergents that contain solvents. Remove any splashes immediately. 5.3 Packing This meter is sent out in a protective transport packing. We recommend: Keep the packing material.
Lab 870 What to do if... 6 Error message Err1 Error message Err2 What to do if...
What to do if... Lab 870 Cause No stable measured value Remedy – Incorrect buffer solutions – Change calibration procedure – Buffer solutions too old – Use only once.
Lab 870 What to do if...
What to do if...
Lab 870 Technical data Translation of the legally binding German version Dimensions Weight Mechanical structure Stand October 30, 2009 7 Technical data 7.1 General data approx. 240 x 190 x 80 mm approx. 1.0 kg (without power pack, without stand) Type of protection IP 43 Electrical safety Protective class III Test certificates cETLus Ambient conditions Storage - 25 °C ... + 65 °C Operation 0 °C ... + 55 °C Climatic class 2 Batteries 4 x 1.
Technical data Lab 870 Translation of the legally binding German version Guidelines and norms used Stand October 30, 2009 EMC EC guideline 2004/108/EC EN 61326-1 Class B FCC Class A Instrument safety EC guideline 2006/95/EC EN 61010-1 ANSI/UL 61010-1 CAN/CSA-C22.2 No.
Lab 870 Technical data Translation of the legally binding German version 7.2 Measuring ranges, resolution Manual temperature input Accuracy (± 1 digit) Stand October 30, 2009 Measuring ranges, resolution, accuracy Variable Measuring range Resolution pH - 2.000 ... + 19.999 - 2.00 ... + 19.99 0.001 0.01 U [mV] - 999.9 ... + 999.9 - 2000 ... + 2000 0.1 1 T [°C] - 5.0 ... + 120.0 0.1 T [°F] + 23.0 ... + 248.0 0.1 Variable Range Increment Tmanual [°C] - 25 ...
Technical data Translation of the legally binding German version 60 Lab 870 Stand October 30, 2009 ba75555e04 11/2009
Lab 870 Lists 8 Lists This chapter provides additional information and orientation aids. Abbreviations The list of abbreviations explains abbreviations that appear on the display or when dealing with the instrument. Specialist terms The glossary briefly explains the meaning of the specialist terms. However, terms that should already be familiar to the target group are not described here. Trademarks used The list comprises the trademarks used in the present document and their owners.
Lists Lab 870 Abbreviations 62 °C Temperature unit °Celsius °F Temperature unit, °Fahrenheit ASY Zero point (asymmetry) AutoCal Automatic calibration using a selected buffer set Cal Calibration CalError Error message (see WHAT TO DO IF...) Err1 Overflow Display range exceeded Err2, Err4 Error message (see WHAT TO DO IF...
Lab 870 Lists Glossary Asymmetry see zero point Resolution Smallest difference between two measured values that can be displayed by a meter. AutoRange Name of the automatic selection of the measuring range. Junction The junction is a porous body in the housing wall of reference electrodes or electrolyte bridges. It arranges the electrical contact between two solutions and makes the electrolyte exchange more difficult. The expression, junction, is also used for ground or junctionless transitions.
Lists Lab 870 Potentiometry Name of a measuring technique. The signal (depending on the measured parameter) of the electrode is the electrical potential. The electrical current remains constant. ORP voltage The ORP is caused by oxidizing or reducing substances dissolved in water if these substances become effective on an electrode surface (e. g. a gold or platinum surface). Reset Restoring the original condition of all settings of a measuring system.
Lab 870 Lists Trademarks used ba75555e04 11/2009 Trademark Owner of the trademark Merck Merck KGaA Mettler Toledo Mettler Toledo Fisher Fisher Scientific Company Fluka Fluka AG Radiometer Radiometer Baker Mallinckrodt Baker, Inc. Metrohm Metrohm AG Beckman Beckman Instruments, Inc.
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Lab 870 Lists Index A Authorized use . . . . . . . . . . . . . . . . . . . . . . 14 AutoCal . . . . . . . . . . . . . . . . . . . . . . . . . . . 32 Operational safety . . . . . . . . . . . . . . . . . . . 14 ORP electrode . . . . . . . . . . . . . . . . . . . . . . 25 ORP voltage . . . . . . . . . . . . . . . . . . . . . . . 25 B P Battery compartment . . . . . . . . . . . . . . 17, 51 Baud rate setting . . . . . . . . . . . . . . . . . . . . 42 pH buffer sets . . . . . . . . . . . . . . . . . . .
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Lab 870 Appendix: Firmware update General information With the Update_Labxxx_MxxxP program and a PC you can update the firmware of the Lab 870 to the newest version. z a free USB interface (virtual COM port) on your PC z the driver for the USB interface (installation see page 40) z the Z875 USB cable (included in the scope of delivery of the Lab 870). For the update via the RS232 interface, the following is required: z a free RS232 interface on your PC z the RS232 cable, Z390.
Lab 870 After switching the meter off and on you can check whether the meter has taken over the new software version (see page 55).
SI Analytics GmbH Postfach 2443 D-55014 Mainz Hattenbergstr. 10 D-55122 Mainz Telefon +49 (0) 61 31/66 5111 Telefax +49 (0) 61 31/66 5001 Email: support@si-analytics.com Internet: www.si-analytics.
