Operating Manual Laboratory conductivity meter CG 853P Conductivity meter with integrated printer ba12246e_2 09/99 77
Accuracy when going to press All details contained in this operating manual are valid data at the time of going to press. However, SCHOTT may add details for both technical and commercial reasons, or in order to fulfil legal requirements of different countries. This does not affect the characteristics described. Warranty declaration The designated instrument is covered by a warranty of three years from the date of purchase.
List of contents 1 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81 1.1 1.2 1.3 1.4 1.5 2 Keyboard . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .82 Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .84 Sockets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .84 Declaration of Conformity . . . . . . . . . . . . . . . . . . .85 Technical data . . . . . . . . . . . . . . . . . . . . . . . . . . . .86 Safety . . . . . . . .
List of contents 5 Maintenance, cleaning, disposal . . . . . . . . . . . 139 5.1 Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . .139 5.1.1 Changing the batteries . . . . . . . . . . . . . . .140 5.1.2 Replacing the roll of printer paper . . . . . .141 5.2 Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .142 5.3 Disposal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .142 80 6 What to do if... . . . . . . . . . . . . . . . . . . . . . . . . . .
Overview 1 Overview The compact CG 853P precision conductivity meter lets you perform conductivity measurements rapidly and reliably. The CG 853P provides the highest degree of operating comfort, reliability and measuring safety for all applications. The integrated printer enables the measurements to be documented in compliance with GLP. The proven procedures to determine or set up the cell constant support your work with the conductivity meter.
Overview 1.
Overview Print LED Red: printer off (offline) or malfunction Green: printer ready for operation (online) Printer ON/OFF Paper feed/line feed (Printer off - Print LED lights up red) 83
Overview 1.2 Display Status line Measured value display Function and temperature display 1.3 Sockets 1 2 3 Connections: 1 8 pole socket with pin contacts 2 RS 232 interface/analog output 3 Plug-in power supply Caution Only connect probes to the instrument that cannot feed excessive voltages or currents (> SELV and > circuit with current limiter). Almost all commercial electrodes - especially SCHOTT electrodes - meet these requirements.
Overview 1.4 Declaration of Conformity 29.03.99 SCHOTT Geräte GmbH Im Langgewann 5 D 65719 Hofheim am Taunus Deutschland, Germany, Allemagne 29.
Overview 1.5 Ambient temperature Measuring ranges and resolution 86 Technical data Storage temperature - 25 °C ... + 65 °C Operating temperature 0 °C ... + 55 °C Allowable relative humidity Annual mean: < 75 % 30 days/year: 95 % Other days: 85 % [µS/cm] 0.000 ... 1.999 (only with 0.01 cm-1 cell constant ) 0.00 ... 19.99 (only with 0.01 cm-1 constant and 0.1 cm-1 cell constant ) 0.0 ... 199.9 0 ... 1999 [mS/cm] 0.00 ... 19.99 0.0 ... 199.9 0 ... 500 SAL 0.0 ... 70.
Overview Measuring accuracy (± 1 digit) Given as measuring uncertainty at a confidence level of 95%. All accuracies additionally depend on the accuracies of the measuring probes. No compensation: Accuracy± 0.5 % Non-linear compensation : AccuracyTest sample temperature ± 0.5 %0 °C ... 35 °C according to EN 27 888; ± 0.5 % 35 °C ... 50 °C extended nLF function according to SCHOTT measurements Linear compensation : AccuracyTest sample temperature ± 0.5 % 10 °C ...
Overview Measuring accuracy (± 1 digit) (Continuation) T [°F] NTC 30: Accuracy± 0.2 PT 1000: AccuracyOperating temperature ± 0.9 at 32 °F ... 59 °F ± 0.2at 59 °F ... 95 °F ± 1.8 at 95 °F ... 131 °F Cell constant, to be set C [cm-1] 0.01 0.1 0.250 ... 2.500 Cell constant, calibrated C [cm-1] 0.450 ... 0.500 0.800 ... 1.200 TREF [°C] 20 25 Temperature input Manual [°C] - 5 ... +100 Dimensions and weight Length [mm] 240 Width [mm] 285 Height [mm] 85 Weight [kg] Approx. 1.
Overview Power supply Batteries 4 x 1.5 V AA type alkaline manganese batteries Runtime Approx. 3000 operating hours Mains power supply Connection max. overvoltage category II: Plug-in power supply (Euro plug): Type no.: Z851 Order no.: 28 520 4897 FRIWO FW3288, 11.8134 Friwo Part No. 1816492 Input: 230V ~ / 50 Hz / 23 VA Output: 6 V = / 1,8 A /10,8 VA Plug-in power supply (US plug): Type no.: Z852 Order no.: 28 520 4901 FRIWO FW3288, 11.8451 Friwo Part No.
Overview Test marks TÜV GS, UL/CUL, CE Display Multifunctional LCD Keypad Foil keypad (Polyester) Data storage Temperature compensation Connectors Printer Ring store for 200 value pairs, conductivity/salinity/TDS, temperature Automatic with Pt 1000/NTC (30 kW) -5 ... 100.0 °C Manual input -5 ... 100 °C resolution 1K Measuring cell 8 pole socket with pin contacts RS interface/ analog output Bidirectional RS 232 interface or analog output with autom.
Safety 2 Safety This operating manual contains basic instructions that you must follow during the commissioning, operation and maintenance of the instrument. Consequently, all responsible personnel must read this operating manual before working with the instrument. The operating manual must always be available within the vicinity of the instrument. Target group This measuring instrument was developed for use in the laboratory.
Safety 2.1 Authorized use This instrument is authorized exclusively for measuring the conductivity, salinity, temperature and TDS (total dissolved solids) in the laboratory. The technical specifications as given in the section 1.5 TECHNICAL DATA, must be observed. Only the operation and running of the measuring instrument according to the instructions given in this operating manual is authorized. Any other use is considered unauthorized. 2.
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: l the instrument has been damaged in transport l the instrument has been stored under adverse conditions for a lengthy period of time l the instrument is visibly damaged l the instrument no longer operates as described in this manual If you are in doubt contact the supplier of the instrument.
Safety 94
Commissioning 3 Commissioning Perform the following activities for initial comissioning: Setting the date and time l Set the date and time l Connect the plug-in power supply (for printer functions). 1 Press and hold down the <ì> key. 2 Press the key. The display test appears briefly on the display. The measuring instrument then switches automatically to the setting of the baud rate. 3 Press the key repeatedly until the date flashes on the display.
Commissioning Connecting the plug-in power supply The plug-in power supply supplies the pH meter with low voltage (7.5 V ... 12 V DC). Warning The line voltage on site must lie within the input voltage range of the original plug-in power supply unit (see section 1.5 TECHNICAL DATA). Caution Use original plug-in power supplies only (see section 1.5 TECHNICAL DATA). 2 1 3 1 Insert the plug (1) into the socket (2) of the conductivity meter.
Operation 4 Operation 4.1 Switch on the instrument 1 Place the instrument on a flat surface and protect it against intense light and heat. 2 Connect the conductivity measuring cell to the instrument. 3 Press the key. The display test appears briefly on the display. The instrument then switches automatically to the previously selected measuring mode. 4 Check or determine the cell constant [C]. The procedure is described in section 4.3, on page 106.
Operation Checking the cell constant 1 Press the key repeatedly until LF CELL is displayed. 2 Press the key. The previously selected cell constant ist displayed, e. g. 0.475 cm-1 with a calibrated cell constant. 3 To return to the measuring mode: press the <ì> key when the correct cell constant ist displayed. 4 If a different cell constant is to be set, proceed according to section 4.3 DETERMINING/SETTING UP THE CELL CONSTANT [C].
Operation 4.2 Preparatory activities Measuring Perform the following activities when you want to measure: 1 Connect the measuring cell to the instrument. 2 Adjust the temperature of the test solutions or measure the current temperature if the measurement is made without a temperature probe. 3 Calibrate the instrument with the measuring cell or check the cell constant set up. 4 Select the measuring mode by pressing <ì>.
Operation 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 Call up the measuring mode by pressing <ì>. 2 Activate the AutoRead function by pressing . The current measured value is frozen (Hold function). 3 Start the AutoRead function by pressing . AR flashes on the display until a stable measured value is reached.
Operation 4.2.1 Conductivity To measure the conductivity, proceed as follows: 1 Perform the preparatory activities according to section 4.2. 2 Immerse the conductivity measuring cell into the test sample. 3 Press the <ì> key until appears in the status display. The conductivity value appears on the display. 4 If necessary, set the temperature by pressing <▲> <▼> (see section 4.2, page 99). 5 Perform an AutoRead measurement according to section 4.2.
Operation 4.2.2 Salinity To measure the salinity, proceed as follows: 1 Perform the preparatory activities according to section 4.2. 2 Immerse the conductivity measuring cell into the test sample. 3 Press the <ì> key repeatedly until Sal appears in the status line. The salinity value of the sample appears on the display. 4 If necessary, set the temperature by pressing <▲> <▼> (see section 4.2, page 99). 5 Wait for a stable measured value. 6 Perform an AutoRead measurement according to section 4.2.
Operation 4.2.3 TDS (total dissolved solids) To measure the TDS, proceed as follows: 1 Perform the preparatory activities according to section 4.2. 2 Immerse the conductivity measuring cell into the test sample. 3 When measuring with an integrated temperature probe continue with step 4. When measuring without temperature probe: – Determine the temperature of the test sample using a thermometer – Press the <ì> key repeatedly until the status line appears in – Enter the temperature using <▲> <▼>.
Operation 7 Perform an AutoRead measurement according to section 4.2.
Operation 4.2.4 Printing/transmitting measured values Measured values (data records) can be: l printed on the integrated printer or l transmitted to the interface. Note To print, you must switch on the printer using the Print key (Print LED lights up green). To transmit to the interface, you must connect the interface cable. The integrated printer is then switched off automatically.
Operation 4.3 Why determine/set up the cell constant? Determining/setting up the cell constant [C] Due to ageing, the cell constant slightly changes. As a result, an inexact measured value is displayed. Calibration determines the current value of the cell constant and stores this value in the instrument. Thus, you should calibrate at regular intervals. You can determine the cell constant of the conductivity measuring cell in the range 0.450 ... 0.500 cm-1 or 0.800 ... 1.
Operation 4 Immerse the measuring cell into the 0.01 mol/l KCL control standard. 5 Press the key. – If no temperature probe is connected, enter the current temperature of the solution using <▲> <▼> and confirm with – If a temperature probe is connected, the AR measurement to determine the cell constant starts. flashes until a stable signal is achieved. The determined cell constant ist displayed; the measuring instrument automatically stores the cell constant.
Operation Note This method of automatically determining the cell constant by calibrating in the 0.01 mol/l KCL control standard can only be used for measuring cells with a cell constant in the range 0.450 ... 0.500 cm-1 or 0.800 ... 1.200 cm-1. Calibration evaluation After calibrating, the instrument automatically evaluates the current condition of the calibration. The evaluation appears on the display. Cell constant [cm-1] Display 0.450 ... 0.500 cm-1 0.800 ... 1.
Operation Calibration interval (Int 3) The flashing sensor symbol reminds you to calibrate regularly. After the selected calibration interval (Int 3) expires, the sensor symbol flashes. Measurements can continue. Note To ensure the high measuring precision of the measuring system, perform a calibration after the calibration interval expires. Setting the calibration interval The calibration interval (Int 3) is set to 180 days in the factory. The interval can be changed (1 ...
Operation Setting up the cell constant manually To set up the cell constant manually, proceed as follows: 1 Press the key repeatedly until LF CELL appears on the display. 2 Press the key. 3 Press the key repeatedly until the cell constant to be set, e. g. 0.475 cm-1 is displayed: 4 Set up the cell constant to be used by pressing <▲> <▼>, e. g. 0.614 cm-1. 5 To return to the measuring mode: press the <ì> key.
Operation Note The cell constant to be set up must either be taken from the operating manual of the measuring cell or is printed on the measuring cell. Selecting the 0.1 cm-1 cell constant To select the 0.1 cm-1 cell constant proceed as follows: 1 Press the key repeatedly until LF CELL appears on the display. 2 Press the key. 3 Press the key repeatedly until the 0.100 cm-1 cell constant appears on the display. 4 To return to the measuring mode: press the <ì> key.
Operation Selecting the 0.01 cm-1 cell constant To select the 0.01 cm-1 cell constant proceed as follows: 1 Press the key repeatedly until LF CELL appears on the display. 2 Press the run/enter> key. 3 Press the key repeatedly until the 0.010 cm-1 cell constant appears on the display. 4 To return to the measuring mode: press the <ì> key.
Operation Setting up the temperature compensation TC The calculation of the temperature compensation is based on the preset reference temperature, Tref 20 or Tref 25 (see chapter 4.6 CONFIGURATION). You can select one of the following temperature compensations: ips Application notes l Non-linear temperature compensation "nLF" according to DIN 38404 or EN 27 888 l linear temperature compensation "Lin" with a coefficient that can be set in the range 0.001 ... 3.
Operation Selecting the nonlinear temperature compensation To select the non-linear temperature compensation proceed as follows: 1 Press the key repeatedly until LF tc appears on the display. 2 Press the key. 3 Press the key repeatedly until nLF appears on the display. 4 To return to the measuring mode: press the <ì> key.
Operation Selecting the linear temperature compensation To select the linear temperature compensation proceed as follows: 1 Press the key repeatedly until LF tc appears on the display. 2 Press the key. 3 Press the key repeatedly until the adjustable linear temperature coefficient appears on the display. 4 Set up the temperature coefficient, e. g. 1.880 %/K using <▲> <▼>. 5 To return to the measuring mode: press the <ì> key.
Operation Switching off the temperature compensation To switch off the temperature compensation proceed as follows: 1 Press the key repeatedly until LF tc appears on the display. 2 Press the key. 3 Press the key repeatedly until the following display appears. 4 The temperature compensation has been switched off. 5 To return to the measuring mode: press the <ì> key.
Operation 4.4 Storing The conductivity meter has an internal data storage device. Up to 200 data records can be stored in it. A complete data record consists of: l Memory location l Date l Time l Measured value l Temperature l I.D. number You can transmit measured values (data records) to the data storage in 2 ways: l Manual storage l Switching on the AutoStore function (Int 1), see page 119 4.4.
Operation 2 Confirm with . The display changes to the input of the I.D. number. 3 Enter the required I.D. number (1 ... 999) by pressing <▲> <▼>. 4 Confirm with . The instrument changes to the measuring mode. *( +,, message This message appears if all 200 memory locations are full. You have the following options: 118 Store the current measured value.
Operation 4.4.2 Switching on AutoStore (Int 1) The storage interval (Int 1) determines the time interval between automatic storage processes. After the time interval expires, the current data record is transmitted to the data storage and to the interface. The storage interval (Int 1) is set to OFF in the factory. Thus, the AutoStore function is switched off. To switch the function on, set up a time interval (5 s, 10 s, 30 s, 1 min, 5 min, 10 min, 15 min, 30 min, 60 min).
Operation 5 As soon as all 200 memory locations are full, the AutoStore function is terminated (Int 1 = OFF). If too few storage locations are available for your measurements: – backup the data storage (see page 121) and – clear the data stored (see page 127). 6 Confirm with . The prompt for the I.D. number appears on the display. 7 Press <▲> <▼> to set the required I.D. number. 8 Confirm with .
Operation Switching off the AutoStore Switch off the AutoStore function by: l Setting the storage interval (Int 1) to OFF or l Switch the conductivity meter off and on again. 4.4.3 Outputting the data storage The contents of the data storage can be output to the: Outputting to the display l display l interface 1 Press the key repeatedly until Sto disp appears on the display. 2 Press the key. A measured value appears on the display. The I. D.
Operation 3 After 2 s the respective temperature of the data record appears on the display. Stored data records are displayed together with the RCL display indicator. You can perform the following activities: Display further parameters of the data record (I.D. no.
Operation Note If you want to find a specific parameter (e.g. date), proceed as follows: 1 Press the key repeatedly until Sto disp appears on the display. 2 Press the key. A measured value appears on the display. The I. D. number of the data record appears for approx. 2 s. 3 After 2 s the respective temperature of the data record appears on the display. 4 Select the parameter (e.g. date) by pressing .
Operation Outputting to the interface 1 Press the key repeatedly until Sto SEr appears on the display. 2 Press the key. The protocol of the last calibration is transmitted to the printer/RS interface. In the meantime, Sto CAL appears on the display. Following the calibration protocol, the complete contents of the storage is transmitted to the interface. Note You can cancel the transmission by pressing <ì> or .
Operation Sample printout CALIBRATION PROTOCOL 14.04.99 11:37 Device No.: 99990000 CALIBRATION CONDUCTIVITY Cal Time: 14.04.99 / 11:37 Cal Interval: 180d Cal Std.: 0.01 mol/l KCL 23.0 °C Conduct./Tref25: 1413 µS/cm Cell Const : 0.975 1/cm Probe: +++ No. 1: 01.01.99 00:04 2.40 mS/cm 25 °C Tman nLF Tref25 C = 0.475 1/cm Ident : 1 No. 2: 10.01.99 10:09 2.40 mS/cm 25.3 °C Tauto nLF Tref25 C = 0.475 1/cm Ident : 1 No. 3: 12.01.99 01:48 2.40 mS/cm 21.6 °C Tauto nLF Tref25 C = 0.
Operation l Contents of the measuring storage: – Number of the storage location (No.) – Date/time of measurement – Measured value/unit (mS/cm) [°C/F] – Automatic/manual temperature measurement (Tauto/Tman) – Temperature compensation (nLF) – Tref – Cell constant (1/cm) – AutoRead function (AR) – I.D.
Operation 4.4.4 Clearing the storage This function can erase the stored data records. 200 memory locations will then become available again. Note The Clear store function only appears if data records have already been stored in the storage. Otherwise, the conductivity meter automatically changes to the measuring mode. In order to delete all the data records, proceed as follows: 1 Switch off the instrument. 2 Press and hold down the key. 3 Press the key.
Operation 4.5 Data transmission You can use the following options to transmit data: l One of the following options: – The AutoStore function (page 119) is used to periodically (Int 1 storage interval) save measured values internally and output them on the interface. – The data transmission interval (Int 2) function is used to periodically output measured values to the interface (see below).
Operation Setting the data transmission interval The interval is set to OFF in the factory. To start the data transmission, set up an interval (5 s, 10 s, 30 s, 1 min, 5 min, 10 min, 15 min, 30 min, 60 min): 1 Press and hold down the key. 2 Press the key. Int 2 appears on the display. 3 Press <▲> <▼> to set up the required time interval between storage processes. 4 Confirm with . The instrument changes automatically to the measuring mode.
Operation 4.5.2 Recorder (analog output) You can transmit the data to a recorder via the analog output. Connect the analog output to the recorder via the Z394 interface cable. The data output switches automatically to recorder output. 1 Free 2 Plug coding 3 Ground 4 Analog output (Internal resistance < 5 Ohm) Socket assignment Note Activate the analog output by connecting 2 and 3 or use the original cable.
Operation 4.5.3 PC/external printer (RS232 interface) You can transmit data to a PC or an external printer via the RS232 interface. Connect the interface to the instrument via the Z395 cable (PC) or Z391 cable (external printer). The data output switches automatically to RS232. Note The RS232 interface is not galvanically isolated.
Operation 4.6 Configuration You can adapt the conductivity meter to your individual requirements. To do this, the following parameters can be called up/changed (the status on delivery is marked in bold): Baud rate 1200, 2400, 4800. 9600 Data transmission interval (Int 2) OFF, 5 s, 10 s, 30 s, 1 min, 5 min, 10 min, 15 min, 30 min, 60 min Calibration interval (Int 3) 1 ... 180 ...
Operation Baud rate 4 Set up the required baud rate by pressing <▲> <▼>. 5 Confirm with . Int 2 appears on the display. Data transmission interval 6 Set up the required time interval by pressing <▲> <▼>. 7 Confirm with . Int.3 appears on the display.
Operation Calibration interval 8 Set up the required time interval by pressing <▲> <▼>. 9 Confirm with . ARng appears on the display. ARng (AutoRange) 10 With <▲> <▼> select between YES and no. 11 Confirm with . t25 appears on the display.
Operation Reference temperature 12 With <▲> <▼> select between t25 . and t20 13 Confirm with . LF appears on the display. Conductivity 14 With <▲> <▼> select between S/cm and MΩ. 15 Confirm with . USE °C appears on the display. Temperature unit 16 Select between °C and °F by pressing <▲> <▼>. 17 Confirm with . The date flashes on the display.
Operation Date and time 18 Set today’s date by pressing <▲> <▼>. 19 Confirm with . The date (month) flashes on the display. 20 Set the current month by pressing <▲> <▼>. 21 Confirm with . The year appears on the display. 22 Set the current year by pressing <▲> <▼>. 23 Confirm with . The hours flash on the display. 24 Set the current time by pressing <▲> <▼>. 25 Confirm with . The minutes flash on the display. 26 Set the current time by pressing <▲> <▼>.
Operation 4.7 Reset You can reset (initialize) measuring and configuration parameters separately from one another. Measuring parameters The following measuring parameters (Cond InI) are reset to the values they had on delivery: Measuring mode Cell constant 0.475 cm-1 (calibrated) 0.475 cm-1 (set up) Temperature compensation nLF Reference temperature Temperature coefficient of 2.000 %/K the linear temperature compensation TDS factor 1.
Operation Resetting measuring parameters 1 Press and hold down the key. 2 Press the key. 3 Use <▲> <▼> to toggle between no and yes. yes: reset measuring parameters. no: retain settings. 4 Confirm with . The instrument changes to the configuration parameters. Resetting configuration parameters 5 Toggle between no and yes by pressing <▲> <▼>. yes: reset configuration parameters. no: retain settings. 6 Confirm with .
Maintenance, cleaning, disposal 5 Maintenance, cleaning, disposal 5.1 Maintenance The maintenance tasks are restricted to the following activities: l replacing the batteries and l replacing the roll of printer paper. Note See the relevant operating manual of the electrode for instructions on maintenance.
Maintenance, cleaning, disposal 5.1.1 Changing the batteries 1 Open the battery compartment (1) on the underside of the instrument. 2 Remove the four batteries from the battery compartment. 3 Insert four new batteries (Type Mignon AA) into the battery compartment. 4 Close the battery compartment (1). The date (day) flashes on the display. 5 Set up the date and time according to chapter 3 COMMISSIONING. 1 Caution Make sure that the poles of the batteries are the right way round.
Maintenance, cleaning, disposal 5.1.2 Replacing the roll of printer paper 1 Switch off the printer (Print LED lights up red). 2 Open the lid of the printer (1). 3 Remove the empty roll of paper (2). 4 Insert the new roll of paper: – Fold the leading edge of the paper inwards and thread it into the printer (3) from underneath. – Press the Print key (paper feed). 5 Close the lid of the printer (1). 1 2 3 Note Only use original SCHOTT HQ thermal paper.
Maintenance, cleaning, disposal 5.2 Cleaning Occasionally wipe the outside of the measuring instrument 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 Disposal Packing The measuring instrument is sent out in a protective transport packing. We recommend: Keep the packing material.
What to do if... 6 Error message, I / Error message, What to do if...
What to do if...
Lists 7 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. Index The index helps you find the topics that you are looking for.
Lists Abkürzungsverzeichnis Conductivity value 146 ABS Plastic housing AR AutoRead (drift control) ARng Automatic range switching Measuring instrument measures with highest resolution AutoStore Automatic storing Baud Baud rate C Cell constant cm-1 Cal Calibration CELL Cell constant disp Display Output of the data storage on the display E3 Error message (see chapter 6 WHAT TO DO IF...) Ident I. D.
Lists Sto CIr Clear storage Sto disp Output of the data storage on the display Sto Full Memory full Sto SEr Output of the data storage to the printer/ interface Tauto Automatic temperature measurement TC Temperature coefficient TDS Total dissolved solids TP Temperature Probe Temperature measurement active Tref 20/T20 Reference temperature 20 °C Tref 25/T25 Reference temperature 25 °C °C Temperature unit °Celsius °F Temperature unit Fahrenheit 147
Lists Glossary AutoRead Monitors the electrode drift and releases the measured value only after the stability criterion has been reached. In this way, this procedure ensures the highest degree of precision and reproducibility. Calibration The cell constant is determined through calibration. To do so, the conductivity measuring cell is immersed into a series of aqueous salt solutions with exactly known electric conductiviy.
Lists Resistance Salinity Temperature compensation (TC) Test sample Total dissolved solids (TDS) All substances (solids, liquids, or gases) with mobile charge carriers like for example electrons or ions have a finite ohmic resistance, which means they have an electric conductance that can be measured or an electric conducitivtiy. The salinity is a sum parameter especially for seawater; it gives the salt content of seawater. The temperature has a very strong impact on the electrical conductivity.
Lists 150
Lists Index A analog output 130 authorized use 92 AutoRange 134 AutoRead 100 AutoStore 119 B batteries replacing 139 battery compartment 140 baud rate, setting 133 C calibration 106 interval 109 protocol 108 calibration evaluation 108 cell constant 98, 106 changing the batteries 140 cleaning 142 commissioning 95 condition on delivery 137 conductivity 135 conductivity measurement 101 conductivity/resistance 130 D data record 117 data transmission (interval) 129 date, setting 136 display 84 disposal 142 drif
Lists R recorder output 130 reference temperature 135 replacing the roll of printer paper 141 reset 137 RS232 interface 131 S safety 91 safety precautions 91 salinity 130 salinity measurement 102 sockets 84 storing 117 T TDS 130 TDS (total dissolved solids) 103 temperature compensation 113 linear 115 non-linear 114 setting 113 switch off 116 temperature probe 99 temperature unit 135 time setting 95 time, setting 136 total dissolved solids measurement 103 transmit data 128 W What to do if...
