Operating manual handylab pH/LF 12 Tref2 nLF 5 53 25 M CAL 0 0 S/cm °C TP AR STO O RCL AR pH/Conductivity Pocket Meter ba75370e03 11/2009
Cond 330i/340i 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.
handylab pH/LF 12 List of contents handylab pH/LF 12 - List of contents 1 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 1.1 1.2 1.3 1.4 1.5 1.6 2 4.3 4.4 4.5 4.6 11/2009 Scope of delivery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 Initial commissioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 4.1 4.
List of contents handylab pH/LF 12 4.7 4.8 4.9 5 4 Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65 Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66 Disposal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66 What to do if... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67 6.1 6.2 6.3 7 57 57 58 58 59 62 Maintenance, cleaning, disposal . . . . .
handylab pH/LF 12 Overview 1 Overview 1.1 General features This compact precision handheld meter enables you to carry out pH / ORP measurements and conductivity measurements rapidly and reliably. The handheld meter provides the maximum degree of operating comfort, reliability and measuring certainty for all applications.
Overview handylab pH/LF 12 1.
handylab pH/LF 12 Overview 1.3 Display Status display TDS UpH O S Sal mV/pH % mg/l m S/cm mbarM cm 1/ cmSal °F° % /K TP Probe symbol 1888 Baud Time Day.Month No. Year Ident 8 8 .8 Meas. value display Function and temperature display C Tref25 Tref20 AutoCal DIN Auto Store LoBat nLF Lin Cal AutoCal TEC ARng AR RCL 1.
Overview handylab pH/LF 12 1.5 Operating structure The following overview diagram shows which keys you have to press to select between the different measuring modes: Note When connecting a conductivity measuring cell with temperature probe, the measuring instrument recognizes the probe and automatically switches to the last selected conductivity measuring mode. As soon as the probe is disconnected, the instrument switches to the pH or ORP measuring mode.
handylab pH/LF 12 Overview 1.6 Dimensions and weight Mechanical structure Electrical safety Test certificates Ambient conditions pH/ORP measuring ranges Precision of pH/ORP (± 1 digit) pH correction function ba75370e03 11/2009 Technical data Length [mm] 172 Width [mm] 80 Height [mm] 37 Weight [kg] approx. 0.3 Type of protection IP 66 Protective class III cETLus, CE Storage - 25 °C ... + 65 °C Operation -10 °C ...
Overview Measuring ranges of conductivity Precision of conductivity (± 1 digit) handylab pH/LF 12 Measuring range Resolution 0 ... 1999 1 0.00 ... 19.99 0.0 ... 199.9 0 ... 500 0.01 0.1 1 SAL 0.0 ... 70.0 according to the IOT table 0.1 T [°C] − 5.0 ... + 105.0 0.1 ӕ [µS/cm] ӕ [mS/cm] ӕ Nonlinear compensation : Precision Sample temperature ± 0.5 % 0 °C ... 35 °C according to EN 27 888; ± 0.5 % 35 °C ... 50 °C extended nLF function Linear compensation Accuracy Sample temperature ± 0.
handylab pH/LF 12 Serial interface Power supply ba75370e03 11/2009 Overview Automatic switchover if a PC or printer is connected. Type RS232, data output Baud rate Selectable 1200, 2400, 4800, 9600 baud Data bits 8 Stop bit 2 Parity None Handshake RTS/CTS + Xon/Xoff Cable length Max. 15 m Batteries 4 x 1.5 V alkali-manganese batteries, Type AA Operational life approx. 3000 operating hours Mains FRIWO FW7555M/09, 15.1432.500-00 Friwo Part. No. 1883259 Input: 100 ... 240 V ~ / 50 ...
Overview Applicable guidelines and norms handylab pH/LF 12 EMC EC guideline 2004/108/EC EN 61326-1 EN 61000-3-2 EN 61000-3-3 FCC Class A Instrument safety EC guideline 2006/95/EC EN 61010-1 ANSI/UL 61010-1 CAN/CSA-C22.2 No. 61010-1 Climatic class VDI/VDE 3540 Type of protection EN 60529 FCC Class A Equipment Statement Note: This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to Part 15 of the FCC Rules.
handylab pH/LF 12 Safety 2 Safety This operating manual contains basic instructions that you must follow during the commissioning, operation and maintenance of the measuring instrument. Consequently, all responsible personnel must read this operating manual before working with the measuring system. The operating manual must always be available within the vicinity of the measuring system. Target group The measuring instrument was developed for work in the field and in the laboratory.
Safety handylab pH/LF 12 2.2 General safety instructions This instrument is built and inspected according to the relevant guidelines and norms for electronic measuring instruments (see section 1.6 TECHNICAL DATA). It left the factory in a safe and secure technical condition.
handylab pH/LF 12 Commissioning 3 Commissioning 3.1 Scope of delivery z handylab pH/LF 12LF 12 handheld meter z Operating manual and short operating manual z 4 batteries, 1.5 V Mignon type AA (in the instrument) 3.2 Initial commissioning Perform the following activities: z Set the date and time z Connect the plug-in power supply (optional) Setting the date and time ba75370e03 11/2009 1 Press the key and hold it down. 2 Press the key.
Commissioning Connecting the original plug-in power supply unit handylab pH/LF 12 You can either operate the measuring instrument with batteries or with the plug-in power supply. The plug-in power supply supplies the measuring instrument with low voltage (12 VDC). This saves the batteries. Warning The line voltage at the operating site must lie within the input voltage range of the original plug-in power supply (see section 1.6 TECHNICAL DATA).
handylab pH/LF 12 Operation 4 Operation 4.1 Switching on the measuring instrument 1 Measuring mode when switching on Press the key. The display test appears briefly on the display. After this, the measuring instrument automatically switches to the measuring mode.
Operation Preparatory activities handylab pH/LF 12 4.2 pH value / ORP voltage 4.2.1 General information Perform the following preparatory activities when you want to measure: 1 Connect the pH electrode to the measuring instrument. If necessary, press the key repeatedly until the status display pH (pH measurement) or U (measurement of the ORP voltage) appears.
handylab pH/LF 12 Temperature measurement in pH measurements Operation You can perform pH measurements with or without a temperature probe as well as with the temperature probe of a conductivity measuring cell. The measuring instrument recognizes which sensors are connected and automatically switches to the correct mode for the temperature measurement. The following cases are distinguishable.
Operation handylab pH/LF 12 4.2.2 Measuring the pH value 1 Perform the preparatory activities according to section 4.2.1. 2 Immerse the pH electrode in the test sample. 3 Press the <▲> <▼> keys until pH appears in the status display. The pH value appears on the display. TDS U pHO S Sal mV/pH % mg/l m S/cm mbarM cm 1/ cmSal °F° % /K TP 1699 Baud Time Day.Month No.
handylab pH/LF 12 Operation 3 Start AutoRead with . AR flashes until a stable measured value is reached. This measured value is transmitted to the interface. 4 If necessary, start the next AutoRead measurement with . 5 To terminate the AutoRead function: Press the key. Note The current AutoRead measurement can be terminated at any time (accepting the current value) by pressing .
Operation handylab pH/LF 12 4.2.3 Measuring the ORP voltage In conjunction with an ORP electrode, e.g. BlueLine 31Rx, the measuring instrument can measure the ORP voltage (mV) of a solution. 1 Perform the preparatory activities according to section 4.2.1. 2 Submerse the ORP electrode in the sample. 3 Press the <▲> <▼> keys until the U status display appears. The ORP voltage (mV) of the test sample appears on the display. 4 Wait for a stable measured value.
handylab pH/LF 12 Operation 4.3 Why calibrate? When to calibrate? pH calibration pH electrodes age. This changes the asymmetry (zero point) and slope of the pH electrode. As a result, an inexact measured value is displayed. Calibration determines the current values of the asymmetry and slope of the electrode and stores them in the measuring instrument. Thus, you should calibrate at regular intervals.
Operation handylab pH/LF 12 Note You can automatically print a calibration protocol after the calibration. To do so, connect a printer to the interface according to section 4.7.2 before calibrating. After a valid calibration, the record is printed. Sample printout: CALIBRATION PROTOCOL 02.03.01 14:19 Device No.: 12345678 Calibration pH Cal time: 01.03.01 / 15:20 Cal interval: 7d AutoCal TEC Tauto Buffer 1 2.00 Buffer 2 4.01 Buffer 3 7.00 * Buffer 4 10.01 C1 184.1 mV 25.0°C C2 3.0 mV 25.0°C S1 -59.
handylab pH/LF 12 Preparatory activities Operation 1 Connect the pH electrode to the measuring instrument. If necessary, press the key repeatedly until the status display pH (pH measurement) or U (measurement of the ORP voltage) appears. 2 Keep the buffer solutions ready. 3 Adjust the temperature of the solution and measure the current temperature if the measurement is made without the use of a temperature probe (the TP display indicator is missing from the display). 4.3.
Operation handylab pH/LF 12 TDS U pHO Sal mV/pH % mg/l m S/cm mbarM cm 1/ cmSal °F° % /K TP S 1C t 1 Baud Time Day.Month No. Year Ident 8248 C Tref25 Tref20 AutoCal DIN Auto Store LoBat nLF Lin Cal AutoCal TEC ARng AR RCL 2 If required, enter the temperature of the first buffer solution with <▲> <▼> while keeping the key depressed. 3 Immerse the pH electrode in the first buffer solution. 4 Press the key. The AR display indicator flashes.
handylab pH/LF 12 Operation 7 If required, enter the temperature of the second buffer solution with <▲> <▼> while keeping the key depressed. 8 Immerse the pH electrode in the second buffer solution. 9 Press the key. The AR display indicator flashes. The electrode voltage (mV) or the buffer nominal value appears on the display. Example: TDS UpH pH O S Sal mV mV/pH % mg/l m S/cm mbarM cm 1/ cmSal °F° % /K TP 1184 Baud Time Day.Month No.
Operation handylab pH/LF 12 12 28 Switch to the measuring mode with .
handylab pH/LF 12 Operation 4.3.2 AutoCal DIN For this procedure, use two different standard buffer solutions according to DIN 19266 (type A, C, D or F with pH values at 25 °C of: 1.679 / 4.006 / 6.865 / 9.180). Note Skip the steps 2 and 7 if you use a pH electrode with a temperature probe or the temperature probe of a conductivity measuring cell. 1 Press the key repeatedly until the display Cd1 and the function display AutoCal DIN appear.
Operation handylab pH/LF 12 TDS U pHO Sal mV/pH % mg/l m S/cm mbarM cm 1/ cmSal °F° % /K TP S 1C d2 Baud Time Day.Month No. Year Ident 8248 C Tref25 Tref20 AutoCal DIN Auto Store LoBat nLF Lin Cal AutoCal TEC ARng AR RCL Note At this point, the AutoCal DIN calibration can be terminated with . This corresponds to a single-point calibration. When doing so, the instrument uses the Nernst slope (-59,2 mV/pH at 25 °C) and determines the asymmetry of the electrode.
handylab pH/LF 12 Operation TDS U pHO S Sal mV/pH % mg/l m S/cm mbarM cm 1/ cmSal °F° % /K TP 1594 Baud Time Day.Month No. Year Ident SLO C Tref25 Tref20 AutoCal DIN Auto Store LoBat nLF Lin Cal AutoCal TEC ARng AR RCL 11 Press the key. The value of the asymmetry (mV) appears on the display. TDS U pHO S Sal mV % mg/l m S/cm mbarM cm 1/ cmSal °F° % /K TP 1602 Baud Time Day.Month No.
Operation handylab pH/LF 12 4.3.3 Two-point calibration ConCal For this procedure, use two buffer solutions: z pH 7.0 ± 0.5 z any other buffer solution Note Skip the steps 2 and 9 if you use a pH electrode with a temperature probe or the temperature probe of a conductivity measuring cell. 1 Press the key repeatedly until the ASY display and the Cal function display appears.
handylab pH/LF 12 Operation TDS U pH O S Sal mV/pH % mg/l m S/cm mbarM cm 1/ cmSal °F° % /K TP 1SL O Baud Time Day.Month No. Year Ident 8248 C Tref25 Tref20 AutoCal DIN Auto Store LoBat nLF Lin Cal AutoCal TEC ARng AR RCL 8 Thoroughly rinse the electrode with deionized water. 9 If required, enter the temperature of the second buffer solution with <▲> <▼> while keeping the key depressed. 10 Immerse the pH electrode in the second buffer solution. 11 Press the key.
Operation handylab pH/LF 12 TDS U pHO S Sal mV % mg/l m S/cm mbarM cm 1/ cmSal °F° % /K TP 1603 Baud Time Day.Month No. Year Ident 8ASY C Tref25 Tref20 AutoCal DIN Auto Store LoBat nLF Lin Cal AutoCal TEC ARng AR RCL 15 34 Switch to the measuring mode with .
handylab pH/LF 12 Operation 4.4 Conductivity/Salinity 4.4.1 General information Caution When connecting an earthed PC/printer, measurements cannot be performed in earthed media as incorrect values would result. The RS232 interface is not galvanically isolated.
Operation Checking the cell constant handylab pH/LF 12 1 Press the key repeatedly until CAL disp appears on the display. TDS UpH O S 1C AL Baud Time Day.Month No. Year Ident Sal mV/pH % mg/l m S/cm mbarM cm 1/ cmSal °F° % /K TP dISP C Tref25 Tref20 AutoCal DIN Auto Store LoBat nLF Lin Cal AutoCal TEC ARng AR RCL 2 Press the repeatedly until the last calibrated cell constant is displayed, e. g. 0.472 cm-1. TDS UpH O S 1C C L Baud Time Day.Month No.
handylab pH/LF 12 Operation 4.4.2 Measuring the conductivity You can meaure the conductivity as follows: 1 Perform the preparatory activities according to section 4.4.1. 2 Immerse the conductivity measuring cell in the test sample. 3 Press the < ▲> <▼> keys until and the unit μS/cm appears in the status display. The conductivity value appears on the display. TDS UpH O S Sal mV/pH % mg/l m S/cm mbarM cm 1/ cmSal °F° % /K TP 1530 Baud Time Day.Month No.
Operation handylab pH/LF 12 4.4.4 AutoRead AR (drift control) The AutoRead function (drift control) checks the stability of the measurement signal. The stability has a considerable effect on the reproducibility of the measured value. 1 Select the ӕ or SAL measuring mode with and/or <▲ > <▼>. 2 Immerse the conductivity measuring cell in the test sample. 3 Activate the AutoRead function with . The current measured value is frozen (hold function). 4 Start AutoRead with .
handylab pH/LF 12 Operation 4.4.5 Why determine the cell constant? Determining the cell constant (Calibration in the control standard) Aging slightly changes the cell constant, e. g. by coatings. As a result, an inexact measured value is displayed. The original characteristics of the cell can often be restored by cleaning the cell. Calibration determines the current value of the cell constant and stores this value in the instrument. Thus, you should calibrate at regular intervals.
Operation Calibration evaluation handylab pH/LF 12 After the calibration, the measuring instrument automatically evaluates the current status of the calibration. The evaluation appears on the display. Cell constant [cm-1] Display 0.450 ... 0.500 cm-1 E3 Eliminate the error according to chapter 6 WHAT TO DO IF... Determining the cell constant Outside the range 0.450 ... 0.
handylab pH/LF 12 Operation TDS UpH O S 1C AL Baud Time Day.Month No. Year Ident Sal mV/pH % mg/l m S/cm mbarM cm 1/ cmSal °F° % /K TP 0473 C Tref25 Tref20 AutoCal DIN Auto Store LoBat nLF Lin Cal AutoCal TEC ARng AR RCL 5 To return to the measuring mode: Press the key. The determined cell constant is taken over for the measurement. Note If the error message E3 appears, refer to chapter 6 WHAT TO DO IF...
Operation handylab pH/LF 12 4.4.6 Setting the temperature compensation The calculation of the temperature compensation is based on the preset reference temperature, Tref 20 or Tref 25 (see section 4.8 CONFIGURATION). You can select one of the following temperature compensations: z Nonlinear temperature compensation (nLF) according to EN 27 888 z Linear temperature compensation (Lin) with adjustable coefficient in the range 0.001 ... 3.
handylab pH/LF 12 Selecting the nonlinear temperature compensation Operation You can select the nonlinear temperature compensation as follows: 1 Press the key repeatedly until the status displays ӕ and tC appear. TDS UpH O S 18L F Baud Time Day.Month No. Year Ident Sal mV/pH % mg/l m S/cm mbarM cm 1/ cmSal °F° % /K TP CEtC C Tref25 Tref20 AutoCal DIN Auto Store LoBat nLF Lin Cal AutoCal TEC ARng AR RCL 2 Press the key.
Operation handylab pH/LF 12 2 Press the key. 3 Press the key repeatedly until the adjustable linear temperature coefficient (%/K) appears on the display. TDS UpH O S Sal mV/pH % mg/l m S/cm mbar M cm 1/ cm Sal °F° % /K TP 1224 Baud Time Day.Month No. Year Ident 2000 Tref25 Tref20 LoBat nLF Lin Cal 4 C Auto Store ARng AR RCL AutoCal DIN AutoCalTEC Set the temperature coefficient with <▲> <▼> , e.g. 1.880 %/K.
handylab pH/LF 12 Switching the temperature compensation off Operation You can switch off the temperature compensation as follows: 1 Press the key repeatedly until tc appears on the display. TDS UpH O S 18L F Baud Time Day.Month No. Year Ident Sal mV/pH % mg/l m S/cm mbarM cm 1/ cmSal °F° % /K TP CEtC C Tref25 Tref20 AutoCal DIN Auto Store LoBat nLF Lin Cal AutoCal TEC ARng AR RCL 2 Press the key.
Operation handylab pH/LF 12 4.5 Calibration intervals (Int 3, Int 5) For each measured variable, a time interval is stored. When it has expired, you will be reminded to calibrate. After a calibration interval has expired, the probe symbol of the relevant measured variable flashes. It is still possible to measure. By calibrating the relevant probe, the function is reset and the interval starts anew.
handylab pH/LF 12 Operation 4.6 Saving The measuring instrument has an internal data memory. It can store up to 500 data records. A complete data record consists of: z Number of the storage location z Date/time z Measured values of the probes connected z Temperature z Temperature measuring procedure z ID number You can transmit measured values (data records) to the data storage in two ways: z Save manually z Switch on AutoStore (Int 1), (see page 49). 4.6.
Operation handylab pH/LF 12 TDS UpH O S Sal mV/pH % mg/l m S/cm mbarM cm 1/ cmSal °F° % /K TP 1699 Baud Time Day.Month No. Year Ident 8172 C Tref25 Tref20 AutoCal DIN Auto Store LoBat nLF Lin Cal AutoCal TEC ARng AR RCL Message StoFull 3 Using <▲> <▼>, set the required ID number (1 ... 999). 4 Confirm with . The measured values are stored. The instrument changes to the measuring mode. This message appears when all of the 500 storage locations are occupied.
handylab pH/LF 12 Operation 4.6.2 Switching on AutoStore (Int 1) The save interval (Int 1) determines the chronological interval between automatic save processes. After the fixed interval has expired, the current data record is transmitted to the internal storage and to the interface. Setting the save interval The default setting for the save interval (Int 1) is OFF. By this, the AutoStore function is switched off.
Operation handylab pH/LF 12 TDS UpH O S Sal mV/pH % mg/l m S/cm mbarM cm 1/ cmSal °F° % /K TP 1999 Baud Time Day.Month No. Year Ident Fr e1 C Tref25 Tref20 AutoCal DIN Auto Store LoBat nLF Lin Cal AutoCal TEC ARng AR RCL 6 Set the required ID number with <▲> <▼>. 7 Confirm with . The measuring instrument switches to the last active measuring mode and starts the measuring and saving procedure. AutoStore flashes on the display.
handylab pH/LF 12 Operation 4.6.3 Outputting the data storage You can output the contents of the data storage: z Stored data on the display z Calibration data on the display z Stored data on the serial interface z Calibration protocol to the interface Outputting stored data on the display 1 Press the key repeatedly until StO dISP appears on the display. ISE UpH mol/L mV/pH % ppm mg/L S 1 0 s T O°F Baud Time Day.Month No.
Operation handylab pH/LF 12 Note If you want to search for a certain element of the data record (e.g. date), proceed as follows: Outputting stored data to the interface 1 Using , select the element (e.g. date). 2 Press <▲> or <▼> repeatedly until the required element appears on the display. After approx. 2 s the temperature of the displayed measured value appears. 1 Press the key repeatedly until Sto SEr appears on the display.
handylab pH/LF 12 Operation Sample printout: No. 1: 09.03.99 pH 10.01 Tman Ident : 1 17:10 25 °C AR No. 2: 09.03.99 pH 10.01 Tauto Ident : 1 17:11 24.7 °C AR No. 3: 09.03.99 305.2 mV Tauto Ident : 13 17:12 ... Outputting the calibration data on the display 1 Press the key repeatedly until CAL disp appears on the display. TDS UpH O S 1C AL Baud Time Day.Month No.
Operation handylab pH/LF 12 3 Press to display the value of the asymmetry (mV). TDS U pHO S Sal mV % mg/l m S/cm mbarM cm 1/ cmSal °F° % /K TP 1601 Baud Time Day.Month No. Year Ident 8ASY C Tref25 Tref20 AutoCal DIN Auto Store LoBat nLF Lin Cal AutoCal TEC ARng AR RCL 4 Press to display the cell constant. The displayed value is: z the current, calibrated cell constant (with sensor symbol on the display) or z the fixed cell constant 0.
handylab pH/LF 12 Outputting the calibration protocol on the interface Operation 1 Press the key repeatedly until CAL SEr appears on the display. TDS UpH O S 1C AL Baud Time Day.Month No. Year Ident Sal mV/pH % mg/l m S/cm mbarM cm 1/ cmSal °F° % /K TP dSER C Tref25 Tref20 AutoCal DIN Auto Store LoBat nLF Lin Cal AutoCal TEC ARng AR RCL 2 Press the key. The calibration protocol for all measured variables is transmitted to the interface.
Operation handylab pH/LF 12 4.6.4 Clearing the memory With this function, you can delete stored data records. 500 storage locations will then be available again. Note The Clear memory function only appears when there are data records stored in the memory. Otherwise, the measuring instrument automatically switches to the last active measuring mode. Proceed as follows to clear all data records: 1 Switch off the measuring instrument. 2 Press the key and hold it down. 3 Press the key.
handylab pH/LF 12 Operation 4.7 Transmitting data You have the following possibilities of transmitting data: z One of the following options: – With the AutoStore function (page 49), measured values are periodically saved internally (save interval Int 1) and output on the interface. – With the Data transmission interval function (Int 2), measured values are periodically output on the interface (see below).
Operation handylab pH/LF 12 Note When the AutoStore function is active at the same time, the data transmission is performed according to the setting of the save interval (Int 1). Set the save interval (Int 1) to OFF to activate the Data transmission interval (Int 2). 4.7.2 PC/external printer (RS232 interface) Via the RS 232 interface, you can transmit the data to a PC or an external printer. Use the Z 395 (PC) or Z 391 (ext. printer) cable to connect the interface to the instruments.
handylab pH/LF 12 Operation 4.8 Configuration You can adapt the measuring instrument to your individual requirements. To do this, the following parameters can be changed (the status on delivery is marked in bold): Baud rate 1200, 2400, 4800, 9600 Display during the pH calibration Buffer nominal value, or current electrode voltage Intervals Calibration (Int 3) in days (d) – pH: 1 ... 7 ... 999 d Int 3 – Int 5 Reference temperature – 25 °C (TREF25) t25 – 20 °C (TREF20) t20 Date/time : 1 ...
Operation handylab pH/LF 12 TDS pH O S 1C AL Baud Time Day.Month No. Year Ident Sal mV/pH /pH % mg/l m S/cm mbarM cm 1/ cmSal °F° % /K TP disp C Tref25 Tref20 AutoCal DIN Auto Store LoBat nLF Lin Cal AutoCal TEC ARng AR RCL 6 Select the required display during the pH calibration with <▲> <▼>. mV: Display of the current electrode voltage /pH: Display of the buffer nominal value. 7 Confirm with . On the display, Int 3 appears.
handylab pH/LF 12 Switching over the reference temperature Operation TDS UpH O S Sal mV/pH % mg/l m S/cm mbarM cm 1/ cmSal °F° % /K TP 1t 25 Baud Time Day.Month No. Year Ident 4YES C Tref25 Tref20 AutoCal DIN Auto Store LoBat nLF Lin Cal AutoCal TEC ARng AR RCL 12 Using <▲> <▼>, toggle between t20 and t25. 13 Confirm with . The date flashes on the display. Date and time TDS UpH O S Sal mV/pH % mg/l m S/cm mbarM cm 1/ cmSal °F° % /K TP 1Dis Baud Time Day.Month No.
Operation handylab pH/LF 12 4.9 Reset You can reset (initialize) the measurement parameters and the configuration parameters separately from one another. Measurement parameters pH Conductivity The following measuring parameters are reset to the delivery status: Measuring mode pH Slope -59.16 mV/pH Asymmetry 0 mV Manual temperature input 25 °C Measuring mode ӕ Cell constant 0.475 cm-1 (calibrated) 0.
handylab pH/LF 12 Resetting the measuring parameters Operation 1 Press the key and hold it down. 2 Press the key. The setting to reset the pH measuring parameters appears on the display. pHO TDS S Sal mV/pH % mg/l m S/cm mbarM cm 1/ cmSal °F° % /K TP 1In I Baud Time Day.Month No. Year Ident 4Yno C Tref25 Tref20 AutoCal DIN Auto Store LoBat nLF Lin Cal AutoCal TEC ARng AR RCL 3 Using <▲> <▼>, toggle between no and YES.
Operation Resetting the configuration parameters handylab pH/LF 12 TDS S pH O Sal mV/pH % mg/l m S/cm mbarM cm 1/ cmSal °F° % /K TP 1In I Baud Time Day.Month No. Year Ident 88no C Tref25 Tref20 AutoCal DIN Auto Store LoBat nLF Lin Cal AutoCal TEC ARng AR RCL 64 7 Using <▲> <▼>, toggle between no and YES. YES: Resetting the configuration parameters no: Retaining settings. 8 Confirm with . The measuring instrument automatically switches to the last active measuring mode.
handylab pH/LF 12 Maintenance, cleaning, disposal 5 Maintenance, cleaning, disposal 5.1 Maintenance The measuring instrument is almost maintenance-free. The only maintenance task is replacing the batteries. LoBat on the display indicates that the batteries should be changed. The batteries are then largely depleted. Replacing the batteries 2 1 1 Open the housing after the instrument has been switched off: – Undo the four screws on the underside of the instrument – Pull down the lower cover (1).
Maintenance, cleaning, disposal handylab pH/LF 12 Note For maintenance of electrodes and measuring cells, follow the corresponding operating manual. 5.2 Cleaning Occasionally wipe the outside of the measuring instrument with a damp, lintfree cloth. Disinfect the housing with isopropanol as required. Warning The housing is made of a synthetic material (ABS). Thus, avoid contact with acetone and similar detergents that contain solvents. Remove any splashes immediately. 5.
handylab pH/LF 12 Error message 0FL What to do if... 6 What to do if... 6.
What to do if... handylab pH/LF 12 Buffer solutions No stable measured value – Incorrect buffer solutions – Change calibration procedure – Buffer solutions too old – Use only once.
handylab pH/LF 12 What to do if... 6.2 Error message OFL Conductivity system messages Cause Remedy The measured value lies outside the measuring range Error message E3 – Measuring cell not connected – Connect measuring cell – Cable broken – Replace measuring cell Cause Remedy – Measuring cell contaminated – Clean cell and replace it if necessary – Unsuitable calibration solution – Check calibration solutions 6.
What to do if...
handylab pH/LF 12 Lists 7 Lists This chapter provides additional information and orientation aids. Abbreviations Specialist terms Index ba75370e03 11/2009 The list of abbreviations explains the indicators and the abbreviations that appear on the display and in the manual. 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. The index will help you to find the topics that you are looking for.
Lists handylab pH/LF 12 Abbreviations Conductivity value (international γ) 72 AR AutoRead (drift control) ARng Automatic range switching Measuring instrument measures with highest resolution ASY Asymmetry AutoCal DIN Automatic pH calibration with buffer solutions prepared according to DIN 19 266 AutoCal TEC Automatic pH calibration with SI Analytics technical buffer solutions according to DIN 19267 C Cell constant [cm-1] (internat.
handylab pH/LF 12 ba75370e03 11/2009 Lists SLO Slope setting on calibration TC Temperature coefficient (internat.
Lists handylab pH/LF 12 Glossary Adjusting To manipulate a measuring system so that the relevant value (e. g. the displayed value) differs as little as possible from the correct value or a value that is regarded as correct, or that the difference remains within the tolerance. Asymmetry Designation for the offset potential of a pH electrode.
handylab pH/LF 12 Lists Measuring system The measuring system comprises all the devices used for measuring, e. g. measuring instrument and probe. In addition, there is the cable and possibly an amplifier, terminal strip and armature. Molality Molality is the quantity (in Mol) of a dissolved substance in 1000 g solvent. MultiCal® Name stating that a measuring instrument provides several calibration procedures.
Lists handylab pH/LF 12 Temperature compensation Name of a function that considers the temperature influence on the measurement and converts it accordingly. Depending on the measured parameter to be determined, the temperature compensation functions in different ways. For conductometric measurements, the measured value is converted to a defined reference temperature. For potentiometric measurements, the slope value is adjusted to the temperature of the test sample but the measured value is not converted.
Cond 330i/340i Index Index A K S Asymmetry 23 Authorized use 13 AutoCal DIN 23, 29 AutoCal TEC 23, 25 AutoRead 20, 38 Keys 6 Safety 13 safety precautions 13 Salinity 37 Save interval 49 Scope of delivery 15 Setting the baud rate 59 Setting the date 15, 61 Setting the reference temperature 61 Setting the time 15, 61 single-point calibration 23 Single-point calibration (pH) C Calibration evaluation 24, 40 Calibration interval 46 Calibration procedures 23 Calibration protocol Conductivity 39 Calibrati
Index 78 Cond 330i/340i ba75370e03 11/2009
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