Operating manual Cond 1970i ON / M OFF 530 CAL AUTO READ Tref25 RUN / nLF ENTE R 250° S/cm C ARng RCL TP REL1 STO Cond 1970 i Portable conductivity measuring instrument ba75692e01 01/2007
Cond 1970i Accuracy when going to press Copyright 2 The use of advanced technology and the high quality standard of our instruments are the result of a 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.
Cond 1970i Contents Cond 1970i - Contents 1 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 1.1 1.2 1.3 2 Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 2.1 2.2 3 4.3 4.4 4.5 4.6 01/2007 Scope of delivery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Power supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Initial commissioning . . . . . . . . . . . . . . . . . . . . . . . . . . .
Contents Cond 1970i 4.7 4.8 5 45 45 46 49 Maintenance, cleaning, disposal . . . . . . . . . . . . . . . . . 51 5.1 5.2 5.3 Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51 Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51 Disposal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51 6 What to do if... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53 7 Technical data . . . . . . . . . . .
Cond 1970i Overview 1 Overview The portable Cond 1970i measuring instrument enables you to carry out conductivity measurements rapidly and reliably. The Cond 1970i provides the maximum degree of operating comfort, reliability and measuring certainty for all applications. The proven procedures to determine or set up the cell constant support you in your work with the measuring instrument. The special AutoRead function enables precise measurements.
Overview Cond 1970i Note If you need further information or application notes, you can obtain the following material from WTW: z Application reports z Primers z Safety datasheets. You will find information on available literature in the WTW catalog or via the Internet. 1.1 Display Status display indicator pH S O Sal Time 1888 Baud Day.Month Year No.
Cond 1970i Overview 1.
Overview Cond 1970i 1.
Cond 1970i Safety 2 Safety This operating manual contains basic instructions that you must follow during the commissioning, operation and maintenance of the conductivity 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 Cond 1970i 2.2 General safety instructions This instrument is built and inspected according to the relevant guidelines and norms for electronic measuring instruments (see chapter 7 TECHNICAL DATA). It left the factory in a safe and secure technical condition.
Cond 1970i Commissioning 3 Commissioning 3.1 Scope of delivery z Portable measuring instrument, Cond 1970i with integrated rechargeable battery z Carrying and positioning handle z Carrying strap z Sensor quiver z Plug-in power supply unit z Operating manual 3.2 Power supply Mains operation and charging the battery You can either operate the measuring instrument with the integrated rechargeable battery or with the plug-in power supply.
Commissioning Cond 1970i Connecting the plug-in power supply unit 2 1 3 1 Connect the plug (1) to the socket (2) of the measuring instrument. 2 Connect the original WTW plug-in power supply (3) to an easily accessible mains socket. 3.3 Initial commissioning Perform the following activities: z For mains operation and charging the battery: Connect the plug-in power supply (see section 3.2 POWER SUPPLY). z Set the date and time. Setting the date and time 12 1 Press the key and hold it down.
Cond 1970i Commissioning pH S O Sal Time It 25 Baud Day.Month Year No. Ident Tref25 LoBat ba75692e01 01/2007 nLF 090 Tref20 Lin Oxi Auto Store Cal TEC mV/ pH % mg/l mS/cm 1/cm Sal 4 °C% / K ARng TP REL1 REL2 AR RCL 4 Set the date of the current day with <▲> <▼>. 5 Confirm with . The date (month) flashes in the display. 6 Set the current month with <▲> <▼>. 7 Confirm with . The year appears on the display. 8 Set the current year with <▲> <▼>.
Commissioning Cond 1970i 3.4 Sensor quiver To store the sensors during field operation and to keep the sensor element moist, the quiver tip contains a sponge rubber insert that can be moistened with deionized water. Note For further details on proper storage, refer to the operating manual of the sensor. Moistening the quiver insert 14 1 Press the quiver out of the holder from the back side of the instrument and pull it out completely.
Cond 1970i Operation 4 Operation 4.1 Switching on the measuring instrument 1 Connect a conductivity measuring cell to the measuring instrument. 2 Press the key. The display test appears briefly on the display. Subsequently, the selected cell constant and the temperature compensation that was set up appear for approx. one second one after the other. The measuring instrument then automatically switches to the measuring mode that was last selected.
Operation Cond 1970i 4.2 Measuring 4.2.1 General information You can measure the following variables: z Conductivity z Salinity z Total dissolved solids (TDS) The measuring instrument is supplied with the following functions: z AutoRange (automatic switchover of the measurement range). If a measuring range is exceeded, AutoRange causes the measuring instrument to change automatically to the next higher measuring range and back again.
Cond 1970i Operation Measuring the temperature For the temperature compensation, it is required to measure the temperature of the test sample. You have the following possibilities of measuring the temperature: z The temperature sensor integrated in the sensor measures the temperature automatically (example: TetraCon 325). z Automatic temperature measurement by the external temperature sensor (accessory) NTC30 or Pt1000.
Operation Cond 1970i 4.2.2 Conductivity You can carry out the conductivity measurements as follows: 1 Perform the preparatory activities according to section 4.2.1. 2 Immerse the conductivity measuring cell in the test sample. 3 Press the key until appears in the status display. Depending on the setting, one of the following display indicators appears on the display: pH S O Sal Time C 530 Baud Day.Month Year No.
Cond 1970i Operation 4.2.4 TDS (Total dissolved solids) You can measure the total dissolved solids as follows: 1 Perform the preparatory activities according to section 4.2.1. 2 Immerse the conductivity measuring cell in the test sample. 3 Press the key until the unit mg/l appears. The value of the total dissolved solids appears in the upper display line. The TDS factor appears in the lower display line. pH S O Sal Time C 474 Baud Day.Month Year No.
Operation Cond 1970i 4.2.5 AutoRead AR (drift control) and hold function The AutoRead function (drift control) checks the stability of the measurement signal. The stability has a considerable impact on the reproducibility of the measured values. With the aid of the hold function the measured value display is frozen. Use the AutoRead function and hold function like this: 1 Select the required measuring mode with . 2 Activate the AutoRead function with .
Cond 1970i Operation 4.3 Determining/setting up the cell constant [C] Why determine/set up the cell constant? Aging slightly changes the characteristics of the cell, 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 cell constant and stores it in the instrument. Thus, you should calibrate at regular intervals (we recommend: every 6 months).
Operation Printing the calibration protocol Cond 1970i The calibration protocol contains the calibration data of the current calibration. You can transmit the calibration protocol to a printer via the serial interface (see page 39). Note You can automatically print a calibration protocol after the calibration. To do so, connect a printer to the interface according to section 4.6.3 before calibrating. After a valid calibration, the record is printed. Sample printout: CALIBRATION PROTOCOL 14.04.
Cond 1970i Operation 4.3.1 Determining the cell constant (calibrating) Note This method of automatically determining the cell constant by calibration with the 0.01 mol/l KCL standard solution can only be used for measuring cells with cell constants in the range 0.450 ... 0.500 cm-1 or 0.800 ... 1.200 cm-1. This is how you can determine the cell constant: 1 Press the key until CELL appears on the display. pH S O Sal Time 1C T 1 Baud Day.Month Year No.
Operation Cond 1970i 6 Press the key. – If no temperature sensor is connected, enter the current temperature of the solution with <▲> <▼> and confirm with . – If a temperature sensor is connected, the AR measurement to determine the cell constant starts. The AR display indicator flashes until a stable signal is reached. The cell constant determined is displayed. The measuring instrument automatically stores the cell constant. pH S O Sal Time C C AL Baud Day.Month Year No.
Cond 1970i Operation 4.3.2 Setting the cell constant manually Note The cell constant to be set must either be taken from the operating manual of the measuring cell or is printed on the measuring cell. You can set the cell constant manually as follows: Setting the fixed cell constant 0.010 cm-1 You can set the fixed value 0.010 cm-1 for the cell constant as follows: 1 Press the key repeatedly until CELL appears on the display. pH S O Sal Time 1C T 1 Baud Day.Month Year No.
Operation Range 0.090 ... 0.110 cm-1 Cond 1970i 1 Press the key repeatedly until CELL appears on the display. pH S O Sal Time 1C T 1 Baud Day.Month Year No. Ident Tref25 LoBat nLF 1/cm Sal C E L L °C% / K Tref20 Lin Oxi Auto Store Cal TEC ARng TP REL1 REL2 AR RCL 2 Press the key. 3 Press the key repeatedly until a cell constant in the range 0.090 ... 0.110 cm-1 appears on the display. pH S O Sal Time C 925 Baud Day.Month Year No.
Cond 1970i Operation Range 0.250 ... 2.500 cm-1 1 Press the key repeatedly until CELL appears on the display. pH S O Sal Time 1C T 1 Baud Day.Month Year No. Ident Tref25 LoBat nLF CELL Tref20 Lin Oxi Auto Store Cal TEC TP REL1 REL2 AR RCL 2 Press the key. 3 Press the repeatedly until until a cell constant in the range 0.250 ... 2.500 cm-1 appears. Time C 428 Baud Day.Month Year No.
Operation Cond 1970i 4.4 Setting the temperature compensation TC The calculation of the temperature compensation is based on the preset reference temperature, 20 °C or 25 °C. It appears on the display as Tref20 or Tref25. To switch over the reference temperature, see section 4.7 CONFIGURATION. You can select one of the following temperature compensation methods: z Nonlinear temperature compensation (nLF) according to EN 27 888 z Linear temperature compensation (Lin) with selectable coefficients of 0.
Cond 1970i Operation 4.4.1 Selecting the nonlinear temperature compensation You can select the nonlinear temperature compensation as follows: 1 Press the key repeatedly until tc appears on the display. pH S O Sal Time 1C T 1 Baud Day.Month Year No. Ident Tref25 LoBat nLF CEtc Tref20 Lin Oxi Auto Store Cal TEC ARng TP REL1 REL2 AR RCL Press the key. 3 Press the key repeatedly until nLF appears on the display. Time C 684 Baud Day.Month Year No.
Operation Cond 1970i 4.4.2 Selecting the linear temperature compensation You can select the linear temperature compensation as follows: 1 Press the key repeatedly until tc appears on the display. pH S O Sal Time 1C T 1 Baud Day.Month Year No. Ident Tref25 LoBat nLF CEtc Tref20 Lin Oxi Auto Store Cal TEC 1/cm Sal % /K °C ARng TP REL1 REL2 AR RCL 2 Press the key.
Cond 1970i Operation 4.4.3 Switching the temperature compensation off You can switch off the temperature compensation as follows: 1 Press the key repeatedly until tc appears on the display. pH S O Sal Time 1C T 1 Baud Day.Month Year No. Ident Tref25 LoBat nLF CEtc Tref20 Lin Oxi Auto Store Cal TEC ARng TP REL1 REL2 AR RCL Press the key. 3 Press the key repeatedly until the following display appears. Time 1224 Baud Day.Month Year No.
Operation Cond 1970i 4.5 Saving The measuring instrument has an internal data memory. It can store up to 500 datasets. A complete data record consists of: z Storage location z Date/time z Measured value 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). 4.5.1 Saving manually You can transmit a measured value to the data storage as follows: 1 Press the key.
Cond 1970i Operation pH S O Sal Time C 553 Baud Day.Month Year No. Ident Tref25 LoBat Message StoFull nLF mV/ pH % mg/l mS/cm 1/cm Sal 0 2 4 1 °C% / K Tref20 Lin Oxi Auto Store Cal TEC TP REL1 REL2 AR RCL ARng 3 Using <▲> <▼>, enter the required ID number (1 ... 999). 4 Confirm with . The instrument changes to the measuring mode. This message appears when all of the 500 storage locations are occupied.
Operation Cond 1970i 4.5.2 Saving automatically 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 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.
Cond 1970i Operation 6 Confirm with . The prompt for the ID number appears on the display. pH S O Sal Time I499 Baud Day.Month Year No. Ident Tref25 LoBat nLF FRE Tref20 Lin Oxi Auto Store Cal TEC mV/ pH % mg/l mS/cm 1/cm Sal 1 °C% / K ARng TP REL1 REL2 AR RCL 7 Set the required ID number with <▲> <▼>. 8 Confirm with . The instrument switches to the measuring mode and starts the measuring and saving process. AutoStore flashes on the display.
Operation Cond 1970i 4.5.3 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 on the interface Outputting stored data on the display 1 Press the key repeatedly until StO dISP appears on the display. pH S O Sal Time IST o Baud Day.Month Year No. Ident Tref25 LoBat nLF 2 DIS Tref20 Lin Oxi Auto Store Cal TEC Baud No.
Cond 1970i Operation Note If you want to search for a certain element (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 date 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. pH S O Sal Time IST o Baud Day.Month Year No.
Operation Cond 1970i Sample printout: Device No.: 99990000 No. 1: 01.01.02 00:04 2.40 mS/cm 25 °C Tman nLF Tref25 C = 0.475 1/cm Ident : 1 No. 2: 10.01.02 10:09 2.40 mS/cm 25.3 °C Tauto nLF Tref25 C = 0.475 1/cm Ident : 1 No. 3: 12.01.02 01:48 2.40 mS/cm 21.6 °C Tauto nLF Tref25 C = 0.475 1/cm Ident : 1 ... Outputting the calibration data on the display 1 Press the key repeatedly until CAL dISP appears on the display. pH S O Sal Time C C AL Baud Day.Month Year No.
Cond 1970i Operation pH S O Sal Time CCCL Baud Day.Month Year No. Ident Tref25 LoBat Outputting the calibration protocol on the interface nLF 047 Tref20 Lin Oxi Auto Store Cal TEC mV/ pH % mg/l mS/cm 1/cm Sal 5 °C% / K ARng TP REL1 REL2 AR RCL 3 Using or , you can switch back to the measuring mode. 1 Press the key repeatedly until CAL SEr appears on the display. pH S O Sal Time C C AL Baud Day.Month Year No.
Operation Cond 1970i 4.5.4 Clearing the memory With this function, you can delete the 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 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.
Cond 1970i Operation 4.6 Transmitting data You have the following possibilities of transmitting data: z One of the following options: – With the AutoStore function (page 34), 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 Setting the Data transmission interval Cond 1970i The default setting for the interval is OFF. To start the data transmission, set an interval (5 s, 10 s, 30 s, 1 min, 5 min, 10 min, 15 min, 30 min, 60 min): 1 Press the key and hold it down. 2 Press the key. Int 2 appears on the display. pH S O Sal Time InT 2 Baud Day.Month Year No.
Cond 1970i Operation 4.6.2 Recorder (analog output) You can transmit data to a recorder via the analog output. Connect the analog output to the recorder via the AK323 interface cable. The data output automatically switches to Recorder output. Socket assignment 1 4 2 3 RS 232 REC 1 free 2 Plug coding 3 Ground 4 Analog output (internal resistance < 5 Ohm) Note The analog output is activated automatically in the cable by connecting 2 and 3.
Operation Cond 1970i TDS 44 Measuring range Voltage Resolution 0 ... 1999 mg/l 0 ...
Cond 1970i Operation 4.6.3 PC/external printer (RS232 interface) Via the RS 232 interface, you can transmit the data to a PC or an external printer. Use the AK340/B (PC) or AK325/S (ext. printer) cable to connect the interface to the devices. The data output automatically switches to the RS232 interface. Warning The RS232 interface is not galvanically isolated. When connecting an earthed PC/printer, measurements cannot be performed in earthed media as incorrect values would result.
Operation Cond 1970i 4.7 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 Calibration interval (Int 3) 1 ... 180 ... 999 d AutoRange ARng On or off Reference temperature – 25 °C (TREF25) – 20 °C (TREF20) Date/time Any Note You can leave the configuration menu at any time with .
Cond 1970i Operation Calibration interval pH S O Sal Time Int 3 Baud Day.Month Year No. Ident Tref25 LoBat AutoRange automatic selection of the measurement range nLF Lin Store Cal TEC ARng TP REL1 REL2 AR RCL 7 Confirm with . ARng appears on the display. pH S O Sal Year IAR n Baud No. Ident Tref25 LoBat nLF dyE Tref20 Lin Oxi Auto Store Cal TEC mV/ pH % mg/l mS/cm 1/cm Sal S °C% / K ARng TP REL1 REL2 AR RCL 8 Using <▲> <▼>, switch between no and YES.
Operation Cond 1970i Date and time pH S O Sal Time It 25 Baud Day.Month Year No. Ident Tref25 LoBat 48 nLF 090 Tref20 Lin Oxi Auto Store Cal TEC mV/ pH % mg/l mS/cm 1/cm Sal 4 °C% / K ARng TP REL1 REL2 AR RCL 12 Set the date of the current day with <▲> <▼>. 13 Confirm with . The date (month) flashes in the display. 14 Set the current month with <▲> <▼>. 15 Confirm with . The year appears on the display. 16 Set the current year with <▲> <▼>.
Cond 1970i Operation 4.8 Reset You can reset (initialize) the measurement parameters and the configuration parameters separately from one another. Measurement parameters The following measured parameters ( condition: InI) are reset to the default Measuring mode Cell constant 0.475 cm-1 (calibrated) 0.475 cm-1 (set up) Temperature compensation nLF Reference temperature 25 °C (TREF25) Temperature coefficient of the linear temperature compensation 2.000 %/K TDS factor 1.
Operation Resetting the measuring parameters Cond 1970i 1 Press the key and hold it down. 2 Press the key. pH S O Sal Time Iini Baud Day.Month Year No. Ident Tref25 LoBat Resetting the configuration parameters nLF Tref20 Lin Oxi Auto Store Cal TEC 1/cm Sal o °C% / K ARng TP REL1 REL2 AR RCL 3 Using <▲> <▼>, switch between no and YES. YES: Resetting the measuring parameters no: Retaining settings. 4 Confirm with .
Cond 1970i Maintenance, cleaning, disposal 5 Maintenance, cleaning, disposal 5.1 Maintenance The measuring instrument is maintenance-free. 5.2 Cleaning Occasionally wipe the outside of the measuring instrument with a damp, lint-free cloth. Disinfect the housing with isopropanol as required. Warning The housing components are made out of synthetic materials (polyurethane, ABS and PMMA). Thus, avoid contact with acetone and similar detergents that contain solvents. Remove any splashes immediately.
Maintenance, cleaning, disposal Measuring instrument, 52 Cond 1970i Dispose of the measuring instrument without the rechargeable battery as electronic waste at an appropriate collection point.
Cond 1970i What to do if... 6 Display LoBat Instrument does not react to keystroke What to do if... Cause Remedy – Battery almost empty – Charge the battery (see section 3.2) Cause Remedy – Operating condition undefined or EMC load unallowed – Processor reset: Press the and keys at the same time and release them again. The software version is displayed.
What to do if... Sensor symbol flashes Message StoFull You want to know which software version is in the instrument 54 Cond 1970i Cause Remedy – Calibration interval expired – Recalibrate the measuring system Cause Remedy – All memory locations are full – Output data storage and clear data storage Cause Remedy – E. g., a question by the WTW service department – Simultaneously press the and keys and release them again. The software version is displayed.
Cond 1970i Technical data Test certificates Dimensions Weight Mechanical structure Electrical safety Ambient conditions Power supply 7 Technical data 7.1 General data cETLus, CE approx. 90 x 200 x 190 mm approx. 1.5 kg (without plug-in power supply) Type of protection: IP 67 Protective class: III Operation -10 °C ... + 55 °C Storage - 25 °C ... + 65 °C Climatic class 2 Rechargeable battery Nickel-cadmium (NiCad) rechargeable battery Operational life approx.
Technical data Serial interface Analog output (AK 323/ S cable) Guidelines and norms used 56 Cond 1970i Automatic switchover when a PC or a printer is connected via the cable, AK 340/B or AK 325/S. Type RS232, data output Baud rate Can be set to 1200, 2400, 4800, 9600 Baud Data bits 8 Stop bits 2 Parity None Handshake RTS/CTS + Xon/Xoff Cable length Max. 15m Automatic switchover when the recorder is connected by the cable, AK 323/S. pH output signal -200 ... +1999 mV for the range - 2.
Cond 1970i ba75692e01 Technical data 01/2007 Climatic class VDI/VDE 3540 IP protection EN 60529:1991 57
Technical data Cond 1970i 7.2 Measuring ranges and resolutions Measuring ranges, resolutions, accuracies Variable Measuring range Resolution [µS/cm] 0.000 ... 1.999 * 0.00 ... 19.99 ** 0.0 ... 199.9 0 ... 1999 0.001 0.01 0.1 1 [mS/cm] 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 TDS [mg/l] 0 ... 1999 Factor can be set between 0.40 ... 1.00 1 T [°C] − 5.0 ... + 105.0 0.1 * only possible with cells of the cell constant 0.
Cond 1970i Technical data Accuracy (± 1 digit) Variable Accuracy at test sample temperature , temperature compensation (TC) none ± 0.5 % Nonlinear ± 0.5 % 0 °C ... + 35 °C according to EN 27 888 ± 0.5 % + 35 °C ... + 50 °C Extended nLF function according to WTW measurements ± 0.5 % + 10 °C ... + 75 °C ± 0.1 + 5 °C ... + 25 °C ± 0.2 + 25 °C ... + 30 °C Linear SAL / Range 0.0 ... 42.0 TDS [mg/l] ±1 T [°C] / Temperature sensor ba75692e01 01/2007 NTC 30 ± 0.1 0 °C ...
Technical data 60 Cond 1970i ba75692e01 01/2007
Cond 1970i Lists 8 Lists This chapter provides additional information and orientation aids. Abbreviations Specialist terms Index 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 helps you to find the topics that you are looking for.
Lists Cond 1970i Abbreviations Conductivity value (international γ) 62 AR AutoRead (drift control) ARng Automatic range switching Measuring instrument measures with highest resolution C Cell constant [cm-1] (internat.
Cond 1970i Lists Glossary Adjusting AutoRange 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. Name of the automatic selection of the measuring range. AutoRead WTW name for a function to check the stability of the measured value. Calibration Comparing the value from a measuring system (e. g.
Lists Cond 1970i Salinity Salt content Sample Slope Standard solution TDS TDS factor Temperature coefficient The absolute salinity SA of seawater corresponds to the relationship of the mass of dissolved salts to the mass of the solution (in g/Kg). In practice, this dimension cannot be measured directly. Therefore, the practical salinity is used for oceanographic monitoring. It is determined by measuring the electrical conductivity. General designation for the quantity of salt dissolved in water.
Cond 1970i Index Index A L Analog output . . . . . . . . . . . . . . . . . . . 43 Authorized use . . . . . . . . . . . . . . . . . . . 9 AutoRead . . . . . . . . . . . . . . . . . . . . . 20 LoBat . . . . . . . . . . . . . . . . . . . . . . . . .53 M B Mains operation . . . . . . . . . . . . . . . . . .11 Measuring the temperature . . . . . . . . . . .17 Batteries Charging . . . . . . . . . . . . . . . . . . . . 11 Battery Charging time . . . . . . . . . . . . . . . . 11 O Operating safety . . .
Index 66 Cond 1970i ba75692e01 01/2007
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