ba75468e Operating manual VARIO Cond CA L Tre f25 nLF ES C 13 1 2 5 4C 8 ME M S/c m Hand-held conductivity meter ba75468e01 07/2004 DRAFT: Monday, 9.
VARIO Cond Accuracy when going to press Copyright 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.
VARIO Cond 1 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 2 Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 2.1 2.2 3 Commissioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 3.1 3.2 3.3 3.4 4 Authorized use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 General safety instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Scope of delivery . . . . .
VARIO Cond 5.1 5.2 5.3 5.4 5.5 6 Processor reset: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48 Technical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49 7.1 7.2 4 43 43 44 45 45 What to do if... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47 6.1 7 Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Battery exchange . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
VARIO Cond Overview 1 Overview The VARIO Cond hand-held meter and a suitable sensor module enable you to measure the conductivity, specific resistance, salinity or TDS (total dissolved solids) of a solution very easily. Depending on the measuring range expected, the following sensor modules are suitable for operation with the VARIO Cond hand-held meter. Measuring range Sensor module 1 µS/cm ... 200 mS/cm TetraCon V 0.01 µS/cm ...
Overview 6 VARIO Cond
VARIO Cond 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 meter. User qualification The meter was developed for work in the laboratory.
Safety VARIO Cond 2.2 General safety instructions This instrument is built and inspected according to the relevant guidelines and norms for electronic meters (see chapter 7 TECHNICAL DATA). It left the factory in a safe and secure technical condition. Function and operating safety The smooth functioning and operational safety of the meter can only be guaranteed if the generally applicable safety measures and the specific safety instructions in this operating manual are followed during operation.
VARIO Cond Commissioning 3 Commissioning 3.1 Scope of delivery l VARIO Cond hand-held meter l Sensor module (TetraCon V or LR01 V) l Microfiber cleaning cloth l Accompanying documents: – Manual for commissioning – Short instructions to be glued in the lid of the case – CD-ROM with a description of all instrument functions l Transport case with insert 3.2 Initial commissioning Perform the following activities: l Connect the sensor module to the meter (see section 3.
Commissioning VARIO Cond 3.3 Connecting the sensor module 1 Unscrew the coupling ring (1) from the meter. 2 Place the sensor module (2) in a straight position to the meter (turn the wide cut-out to the front) and plug it in carefully with slight force. 2 1 3 10 Using the coupling ring (1), screw the sensor module tight. The instrument is ready for operation.
VARIO Cond Commissioning 3.4 Storing the meter and sensor module To maintain the operability of the meter and sensor module for a long time, leave the sensor module connected to the meter as possible and avoid to plug it on or off when it is not necessary. Thus, the watertight plug-in connector will be well protected. In order to store an already used sensor module separately from the meter, protect the socket of the sensor module with the original protective cap.
Commissioning 12 VARIO Cond
VARIO Cond Operation 4 Operation 4.1 Operating elements The entire operation is carried out via the touch sensitive surface of the display (touch screen). A slight pressure on the surface suffices to start a function. Any pressure on the surface is confirmed by an acoustic signal. Display elements CAL LAP 1 2 S Cell TDS Tref20 Tref25 nLF Lin RESET 7 TC MEM SAL O2 mg/l mbar mS/cm M cm k cm 1314 C 1558 CellTC 1 cm Sal K LoBat Day.
Operation Touch screen VARIO Cond The touch screen contains 8 touch sensitive tactile areas that start different functions when being pressed, depending on the operating situation. The function of the keys is connected to the display indication in this area.
VARIO Cond Touch screen operation Operation In this operating manual, keys are indicated by angle brackets <..>. The touch screen symbol (example <3>) shows you which area you have to press. Function keys are indicated by the relevant name or symbol. The keys can have different functions with a long and short keystroke. In this operating manual, the key symbol (e. g. ) generally means a short keystroke (shorter than 1 sec). A long keystroke (approx.
Operation VARIO Cond 4.2 1 Switching on the meter Switch on the meter with <(>. After a short display test, a measured value is displayed. If no sensor module is connected, the Err4 error message appears on the display (see chapter 6 WHAT TO DO IF...). Note The meter has an energy saving feature to avoid unnecessary battery depletion. The energy saving feature switches the meter off if no entry is made during the specified switch off-interval (see section 4.11).
VARIO Cond Operation 4.3 Measuring 4.3.1 General information Depth of immersion For measurements in a measuring solution we recommend an immersion depth of approx. 36 mm for optimum and reproducible measurement results. The sensor module may only be submersed in a measuring solution up to below the coupling ring. If it is submersed deeper, liquid can penetrate the meter and damage it. AutoRead (drift control) The AutoRead function (drift control) checks the stability of the measurement signal.
Operation VARIO Cond 4.3.2 Setting menu, measured parameter Carrying out measurements 1 Make sure a valid calibration exists for the measuring system (see section 4.4.2), or that the cell constant is correctly adjusted (see section 4.4.2). 2 Immerse the sensor module in the test sample. The display shows the main measured value (conductivity, specific resistance, salinity or TDS) and the measured temperature value.
VARIO Cond Operation 4.3.3 Setting the TDS factor 1 If necessary, press <"_> [] repeatedly until the measured parameter TDS is displayed (see section 4.3.2). 2 Using <§> [], display the adjusted TDS factor. 3 Using <§> [], select the TDS factor. The TDS factor flashes. CAL LAP S Cell TDS Tref20 Tref25 nLF Lin RESET TC MEM SAL O2 mg/l mbar mS/cm M cm k cm 1314 C 8108 CellTC 1 cm Sal K LoBat Day.
Operation VARIO Cond 4.3.4 Switching over the temperature unit For reproducible conductivity measurements, it is essential to measure the temperature of the test sample. A temperature sensor is integrated in the sensor module. You can switch the temperature display from °C to °F: 1 Setting menu of the temperature unit Toggle the display between °C and °F with <§_> [].
VARIO Cond Operation 4.4 Why adjust/ calibrate the cell constant? Adjusting/calibrating the cell constant The actual cell constant of the sensor module can slightly differ from the nominal value of the cell constant. Depending on the required measuring accuracy, you can measure with the nominal value of the cell constant that was set in the factory (see chapter 7 TECHNICAL DATA), or adjust the value of the cell constant.
Operation AutoRead (drift control) Calibration data Calibration status VARIO Cond The calibration procedure automatically activates the AutoRead function. The display of the unit flashes during the AutoRead measurement. The current AutoRead measurement can be terminated at any time (without accepting the current value) by pressing . The calibration data is stored in the sensor module. It contains the value of the determined cell constant.
VARIO Cond Operation CAL LAP Cell TDS S Tref20 Tref25 nLF Lin RESET SAL O2 mg/l mbar mS/cm M cm k cm CELL C 0478 Cell TC 1 cm Sal K Example of the sensor module, TetraCon V ESC CAL LAP TC MEM SAL O2 mg/l mbar mS/cm M cm k cm CELL C 0108 Cell TC Example of the sensor module, LR01 V 1 cm Sal K ESC CLR Cell TDS Tref20 Tref25 nLF Lin RESET CAL LAP TC MEM SAL O2 mg/l mbar mS/cm M cm k cm 1493 C 0481 CellTC 1 cm Sal K LoBat Day.
Operation VARIO Cond 4.4.2 Determining the cell constant (calibration in the control standard) Note This method of automatically determining the cell constant by calibration in the 0.01 mol/l KCL control standard solution can only be used for measuring cells with cell constants in the range 0.450 ... 0.500 cm -1 (sensor module TetraCon V). This is how you can determine the cell constant: 1 Open the setting menu for the cell constant with . The display shows the setting last selected.
VARIO Cond Operation 6 Wait until the measured value is stable. The unit of the measured value display stops flashing. 7 Return to the measuring mode with . The calibrated cell constant is used. Note If no valid calibration can be accomplished, the Err3 error message appears on the display. Measuring is not possible in this condition. Possible causes and actions for error elimination can be found in chapter 6 WHAT TO DO IF....
Operation VARIO Cond 4.5 Setting the temperature compensation The calculation of the temperature compensation is based on the preset reference temperature, Tref20 or Tref25 (see section 4.6 SETTING THE REFERENCE TEMPERATURE). You can select one of the following temperature compensation methods: l Nonlinear temperature compensation (nLF) l Linear temperature compensation (Lin) with selectable coefficients of 0.001 ... 3.
VARIO Cond Operation 4.5.1 Selecting the temperature compensation 1 Open the setting menu for the cell constant with . The display shows the setting last selected. 2 Open the setting menu for the temperature compensation with . The display shows the setting last selected. 3 If necessary, press <§_> repeatedly until the nLF, Lin or OFF display appears.
Operation VARIO Cond 4.5.2 Setting the linear temperature coefficient 1 Select the linear temperature compensation (Lin menu) (see section 4.5.1). 2 Open the setting of the linear temperature coefficient with <§>. CAL LAP S Cell TDS Tref20 Tref25 nLF Lin RESET TC MEM SAL O2 mg/l mbar mS/cm M cm k cm 1387 C 2118 CellTC 1 cm Sal K LoBat Day.Month h:min min:s Lap Ident ESC 3 CAL STO RCL CLR Set the temperature coefficient with <<> or <>>.
VARIO Cond Operation 4.6 Setting the reference temperature The setting is only effective if the linear or nonlinear temperature compensation is switched on. You can set the reference temperature as follows: Setting menu of the reference temperature 1 Open the setting menu for the cell constant with . The display shows the setting last selected. 2 Open the setting menu for the temperature compensation with . The display shows the setting last selected.
Operation VARIO Cond 4.7 Calibration data The calibrated cell constant is displayed after calibration (see section 4.4.2) and is accessible any time. 1 Switch on the meter with <(>. The display test is displayed. 2 During the display test: Display the calibrated cell constant with .
VARIO Cond Operation 4.8 Setting the calibration interval The calibration interval determines how many days after the last calibration the instrument should remind you to recalibrate. The sensor symbol on the display flashes when the calibration interval has expired. 1 Open the Init initialization menu with . Cell CAL LAP TDS S Tref20 Tref25 nLF Lin RESET TC MEM SAL O2 mg/l mbar mS/cm M cm k cm 1nit C 8Yno CellTC 1 cm Sal K LoBat Day.
Operation VARIO Cond 4.9 Saving The VARIO Cond meter has a data memory. Up to 50 measurement datasets can be stored in it. A dataset consists of: l Main measured value (conductivity, specific resistance, salinity or TDS) l Measured temperature value l Time and date l ID number (0000 - 9999) 4.9.1 Saving measured data You can save measured data as follows: 1 Open the save menu with . The memory number of the next free memory location is displayed under the current measured value.
VARIO Cond Operation If all storage locations are occupied, the StoFull message appears. You have the following options: Save the current measured value. The oldest measured value (storage location 1) will be overwritten by this Press Return to the measuring mode without saving Press Erase the entire memory See section 4.9.3 4.9.
Operation VARIO Cond 5 If necessary, display further elements of the dataset (ID number, date, time, temperature) with <§_> [element of the measurement dataset]. 6 Switch to the measuring mode with . 4.9.3 Erasing measured data from the memory To erase all datasets proceed as follows: 34 1 Display the memory with . The W status indicator appears on the display. The measured value that was saved last is displayed. 2 Erase the entire memory with . A security prompt appears.
VARIO Cond Operation 4.10 Clock The meter has a clock. When saving measured values and calibrating, the date and current time are automatically saved as well. The clock has the following additional functions: l Alarm function (see section 4.10.2). l Stopwatch (see section 4.10.3) and l Timer (see section 4.10.4). Note The automatic switch-off (section 4.11) is not activated as long as the clock is indicated on the display. 4.10.
Operation VARIO Cond CAL LAP S Cell TDS Tref20 Tref25 nLF Lin RESET TC MEM SAL O2 mg/l mbar mS/cm M cm k cm 1109 C 1305 CellTC 1 cm Sal K LoBat Day.Month h:min min:s Lap Ident ESC CLR 4 Set the time with <>> and <<>. 5 Select the [ or ] with <5_> or <6_>. The d symbol flashes. 6 Set the date with <>> and <<>. 7 Confirm the setting with . The year is displayed. 8 Set the year with <>> and <<>. 9 Confirm the setting with . The time and date are displayed again.
VARIO Cond Operation 4.10.2 Alarm function With the alarm function you set a point of time (alarm time) at which an alarm signal should sound. Prerequisite is the correct setting of the time (see section 4.10.1). The alarm signal also sounds when the meter is switched off. 1 Switch on the meter with <(>. After a short display test, a measured value is displayed. 2 Press to indicate the time and date on the display. The v status indicator appears. 3 Indicate the alarm time with .
Operation Switching on the alarm function Switching off the alarm function VARIO Cond 7 Switch to the date and time display with . The alarm function is switched on. The v status indicator flashes. or Switch to the date and time display with . The alarm time is stored. The alarm function is switched off. 8 When the alarm time is due and the alarm function is switched on, an alarm signal can be heard for one minute and the measured value display flashes. Switch off the alarm signal with <(>.
VARIO Cond Operation 3 Display the current time as an intermediate time with . The intermediate time is displayed under the running stopwatch. 4 Stop the stopwatch with . 5 Let it continue with . or Reset the stopwatch to 00:00 with . or Terminate the stopwatch and switch to the measuring mode display with . 4.10.4 Timer The timer function can count down the seconds of a specified time interval (timer intervall) of maximum 59:59 (minutes:seconds).
Operation VARIO Cond 7 If necessary, stop the timer before the time has expired with and make it continue with . 8 As soon as the time has expired the alarm signal sounds. Switch off the alarm signal with <(>. The timer goes on counting with a negative sign. 9 Stop the timer with . Note If the timer has been stopped you can l Reset the timer to the adjusted timer interval with . l Terminate the timer and switch to the measured value display with . 4.
VARIO Cond Operation 4.12 Reset The following parameters are stored in the sensor module. The reset function resets them to the delivery condition. Sensor module, TetraCon V Parameter Measuring mode Adjustable values , Spec. resistance, Sal, TDS Delivery condition , with adjusted cell constant Cell constant, to be calibrated 0.450 ... 0.500 0.475 Cell constant, to be adjusted 0.450 ... 0.500 0.475 Temperature compensation nLF, Lin, Off nLF linear TC 0.001 ... 3.000 %/K 2.
Operation Resetting the measuring parameters VARIO Cond 1 Start the INIT initialization menu with . 2 For initialization, select YES with <§>. Cell CAL LAP TDS S Tref20 Tref25 nLF Lin RESET TC MEM SAL O2 mg/l mbar mS/cm M cm k cm 1nit C 8YE S CellTC 1 cm Sal K LoBat Day.Month h:min min:s Lap Ident ESC 3 Setting the calibration interval CAL STO RCL CLR Confirm with . The reset is performed.
VARIO Cond Maintenance, cleaning, disposal 5 Maintenance, cleaning, disposal 5.1 Maintenance The meter is almost maintenance-free. The only maintenance activity is exchanging the battery when it is depleted (LoBat display indicator). 5.2 Battery exchange The LoBat display indicator indicates that the battery should be changed. The battery is then largely depleted. Stored calibration data and measuring data are retained when the battery is exchanged.
Maintenance, cleaning, disposal VARIO Cond 3 Place the new battery (type Mignon AA) in the battery compartment. Make sure that the poles of the battery are the right way round. The ± signs on the battery must correspond to the ± signs in the battery compartment. 4 Close the battery compartment. 5 After the battery exchange the meter switches itself on automatically. The display to set the time is displayed (see also section 4.10.1). 5.
VARIO Cond Cleaning the sensor module Maintenance, cleaning, disposal We recommend to clean the sensor module thoroughly, especially before measuring low conductivity values. Before measuring, thoroughly rinse the sensor with deionized water. Contamination Cleaning agent Reaction time at room temperature Water-soluble substances Deionized water Any Fats and oils Warm water and household washing-up liquid Any Heavy contamination Methylated spirits Max.
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VARIO Cond What to do if... 6 Error message 0FL, UFL Error message Err3 Error message Err4 What to do if... Cause Remedy – The measured value lies outside the measuring range – Sensor module defective – Replace sensor module Cause Remedy – Erroneous calibration – Recalibrate – The data of the sensor module is outside the specified characteristics. – Reset to default setting (see section 4.
What to do if... No stable measured value VARIO Cond Cause Remedy – Sensor module contaminated – Clean sensor module – Temperature not stable – Adjust temperature if necessary – Conductivity too low – Use suitable sensor module – Organic liquids – Use suitable measuring system Cause Remedy – Battery almost empty – Exchange the battery (see section 5.
VARIO Cond Technical data Dimensions Weight Mechanical structure 7 Technical data 7.1 Measuring instrument approx. 140 x 80 x 33 mm (without sensor module) approx. 115 g (without sensor module, without battery) Type of protection IP 65 (hose-proof) Electrical safety Protective class III Test certificates CE Ambient conditions Power supply Guidelines and norms used Storage - 25 °C ... + 65 °C Operation -10 °C ... + 55 °C Climatic class 2 Battery 1 x 1.
Technical data VARIO Cond Measuring ranges and resolution Accuracy (± 1 digit) [µS/cm] 0.00 ... 19.99 (only with sensor module, LR01 V) 0.0 ... 199.9 0 ... 1999 [mS/cm] 0.00 ... 19.99 0.0 ... 199.9 Spec. resistance [kΩ*cm] 0.000 ... 1.999 0.00 ... 19.99 0.0 ... 199.9 0 ... 1999 Spec. resistance [MΩ*cm] 0.00 ... 19.99 0.0 ... 199.9 0 ... 1999 SAL 0.0 ... 70.0 according to the IOT table TDS [mg/l] 0 ... 1999 Factor can be set between 0.40 ... 1.00 T [°C] T [°F] − 5.0 ... + 105.0 23.0 ...
VARIO Cond Accuracy (± 1 digit) Technical data SAL Range 0.0 ... 42.0 Accuracy Temperature of test sample ± 0.1 5 °C ... 25 °C ± 0.2 25 °C ... 30 °C TDS [mg/l] 1 T [°C] T [°F] ± 0.1 ± 0.54 Cell constant, calibrated C [cm-1] 0.450 ... 0.500 Cell constant, adjusted C [cm-1] 0.090 ... 0.110 0.450 ... 0.
Technical data VARIO Cond 7.2 Sensor module 7.2.1 Sensor module TetraCon V 1 2 1 Plug head connector 2 Temperature sensor 3 Current electrode (ring) 4 Voltage electrode 3 4 Electrodes Material Dimensions Depth of immersion Connection technique Cell constant Application range 52 Number of electrodes 4 Electrode material Graphite Shaft Epoxy, black Connection head PVC Shaft diameter 15.
VARIO Cond Temperature measurement Storage medium Accessories Technical data Thermistor type Integrated NTC (30 kΩ / 25 °C) Material of thermistor enclosure Graphite Working temperature -5 .. +100°C Thermistor response behavior t99 < 20 sec. Sensor accuracy ± 0.2 K Air Designation Order number E/SET 7.2.
Technical data Dimensions Depth of immersion Connection technique Cell constant Application range Temperature measurement Storage medium Accessories 54 VARIO Cond Shaft diameter 12 mm Shaft length 69 mm Diameter of plug head connector 15 mm Total length of sensor 106.5 mm min.: 30 mm max.: 90.5 mm (T < 50 °C) max.: 69.0 mm (50 °C < T < 100 °C) Vario plug head connector with integrated data storage 0.100 cm-1 ± 1.5 % 0.01 µS/cm ..
VARIO Cond 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 will help you to find the topics that you are looking for.
Lists VARIO Cond Abbreviations Conductivity value 56 °C Temperature unit, Celsius °F Temperature unit, Fahrenheit AR AutoRead (drift control) C Cell constant cm-1 Cal Calibration CELL Cell constant E3 Error message see CHAPTER 6 WHAT TO DO IF...
VARIO Cond Lists 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. AutoRead WTW name for a function to check the stability of the measured value. Calibrating Comparing the value from a measuring system (e. g. the displayed value) to the correct value or a value that is regarded as correct.
Lists VARIO Cond Reference temperature Reset Restoring the original condition of all settings of a measuring system. Resistance 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 or an electric conductivity that can be measured. Resolution Smallest difference between two measured values that can be displayed by a meter.
VARIO Cond 9 Index Index A Reset ..................................................... 41 Alarm function .........................................37 Authorized use ...........................................7 S C Calibration interval ...................................31 Cell constant adjust manually ..................................22 determine ..........................................24 Clock ......................................................35 Conductivity ..................................
Index 60 VARIO Cond
