Page 2
(info.de@kobold.com) in PDF format, specifying the relevant invoice number and serial number. If you wish, the operating instructions can also be sent to you by post in paper...
1 Typographical conventions Warning signs DANGER! This symbol is used when there may be danger to personnel if the instruc- tions are ignored or not followed correctly! CAUTION! This symbol is used when there may be damage to equipment or data if the instructions are ignored or not followed correctly! Note signs NOTE!
2 General Foreword Please read the operating manual before you commission the device. Store the operating manual at a place that is accessible for all users at all times. NOTE! All the required settings are described in this manual. Should there be any difficulties nonetheless at the time of commissioning, we request you not to carry out any impermissible manipulations.
Page 7
2 General 2.2.2 Transmitter with separate sensor Example Transmitter (with or without graphics LC-display) Process connection Temperature sensor Inductive conductivity measuring probe...
3 Inductive conductivity measurement Range of Applications General The inductive measurement process allows a mostly maintenance-free acqui- sition of the specific conductivity even in difficult medium conditions. In con- trast to the conductive measurement process, problems like electrode replacement and polarization do not occur. Brief description The device is used for the measurement/control of the conductivity/concentra- tions of liquid media.
3 Inductive conductivity measurement Function of the transmitter The device is conceived for use at the location. A robust housing protects the electronics and the electrical connections from aggressive ambient influences (system of protection IP67). In the standard version, the device has one analog signal input for the conductivity/concentration and the temperature.
4 Identifying the device version Type nameplate on the transmitter Typ: 202756/16-607-0000-82/000 VARTN: 20/00445843 F-Nr.: 00909467 01 0 0745 0001 DC 19...31 V on the connect- cable (only in case of F-Nr.: 00909467 01 0 0517 0001 separate sen- sor) In the case of devices with a separate sensor (base type supplementation (2) 66), for every instrument, the transmitter and the separate sensor are matched to one another at the factory.
4 Identifying the device version Order details Order Details (Example: LCI-K G40 M PK) Model Version Process connection Electrical connection Material measuring cell G40 = stud thread G1½ male G50 = stud thread G2 male L50 = screwed pipe connection...
5 Device description Technical data 5.1.1 Conductivity transmitter A/D converter Resolution 15 bits Sampling time 500 ms = 2 measurements/s For SELV and PELV circuit operation only. Power supply 19 - 31 V DC (24 V DC nominal) Standard <5 % Residual ripple Reverse polarity protection Power draw...
Page 13
5 Device description 5.1.2 Measuring ranges There is a choice of four different measuring ranges. Any one of these ranges can be activated by an external switch or by a PLC. NOTE! The overall accuracy is composed of transmitter accuracy + sensor accuracy.
Page 14
5 Device description 5.1.3 Temperature transmitters Temperature acquisition Manually, -20.0 to 25.0 to 150 °C or °F, or automatically Measuring range -20 - 150 °C or °F Characteristic linear ≤ 0.5 % of the measuring range Accuracy ≤ 0.1 %/K Ambient temperature effect Output signal 0 - 10 V or 10 - 0 V...
6 Mounting General 6.1.1 Installation location Ensure easy accessibility for subsequent calibration. The fastening must be secure and low-vibration. Avoid direct sunlight. It is necessary to pay attention to a good flow through and around the sensor (2). When installing in a pipe, a minimum distance of 20 mm must be maintained from the sensor to the pipe wall.
6 Mounting Dimensions head transmitter 6.2.1 Process connections Type of measuring cell PEEK Type of measuring cell PVDF Version with process connection Version with process connection G40 = screw-in thread G 1 1/2 A G40 = screw-in thread G 1 1/2 A G50 = screw-in thread G 2 A G50 = screw-in thread G 2 A 1 = stainless steel 1.4301...
Page 18
6 Mounting Type of measuring cell PEEK Type of measuring cell PVDF 2 (607) Version with process connection Version with process connection L50 = tube fitting DN 50 L50 = tube fitting DN 50 L65 = tube fitting DN 65 L65 = tube fitting DN 65 L80 = tube fitting DN 80 L80 = tube fitting DN 80...
Page 19
6 Mounting Type of measuring cell PEEK Type of measuring cell PVDF 1 (617) 2 (616) Version with process connection Version with process connection T65 = Clamp 2 1/2" T65 = Clamp 2 1/2" Type of measuring cell PEEK Version with process connection V40 = VARIVENT ®...
6 Mounting The device with separate sensor 6.3.1 Operating unit Transmitter with separate sensor, in plastic housing with electrical connection M12 plug / socket (mating plug not included) ø110 6.3.2 Wall mounting (standard with remote version)
Page 21
6 Mounting 6.3.3 Process connections Type of measuring cell PEEK Type of measuring cell PVDF Version with process connection Version with process connection G40 = screw-in thread G 1 1/2 A G40 = screw-in thread G 1 1/2 A G50 = screw-in thread G 2 A and G50 = screw-in thread G 2 A 1 = stainless steel 1.4301 2 = PEEK...
Page 22
6 Mounting Type of measuring cell PEEK Type of measuring cell PVDF 2 (607) Split version with process connection Split version with process connection L50 = tube fitting DN 50 L50 = tube fitting DN50 L65 = tube fitting DN65 L65 = tube fitting DN 65 L65 = tube fitting DN 80 L80 = tube fitting DN80...
Page 23
6 Mounting 1 (617) 2 (616) Split version with process connection Split version with process connection T65 = Clamp 2 1/2" T65 = Clamp 2 1/2" (retaining clip not included in delivery) (retaining clip not included in delivery) 1 = stainless steel 1.4301 2 = PEEK 3 = PVDF 4 = PBT...
Page 24
6 Mounting ® Varivent 1 (617) Split version with process connection V40 = VARIVENT ® DN 40/50 (retaining clip not included in delivery) 1 = 1.4301 2 = PEEK 3 = PVDF 4 = PBT 5 = PA 6 = TPU...
6 Mounting Mounting examples Threaded pipe adapter Process connection L50, screwed pipe fitting DN 50, DIN 11851, PEEK Ring nut DN 50, stainless steel 1.4301 Weld-on threaded pipe adaptor DN 50, DIN 11851, stainless steel 1.4404 (matching part for process connection 607) Tee DIN 11852, short, DN 50, stainless steel 1.4301 (to be provided by the plant operator;...
Page 26
6 Mounting Clamp Process connection T65, Clamp 2 1/2", PEEK Clamping ring , stainless steel 1.4301 (to be provided by the plant operator; not supplied by device manufacturer) Tee, short, 2.5" - 2" similar to DIN 11852, and 2" clamp adapter, stainless steel 1.4301 (to be provided by the plant operator;...
Page 27
6 Mounting 6.4.1 Kit for pipe mounting NOTE! The pipe-mounting kit is also suitable for horizontal pipes. Kit for pipe mounting, accessory LCI-RM...
7 Installation DANGER! The electrical connections may only be set up by technically qualified personnel. • When selecting the conductor material for the installation and for the elec- trical connections of the device, compliance is required with the specifica- tions of VDE 0100 "Regulations governing the installation of heavy-current systems with rated voltages below 1000 V"...
7 Installation General Open the operating unit Unscrew the cover (1) Remove captive fastening screw (2) and carefully take out operating unit. Connect the cables SETUP CAUTION! For connecting the individual cores, pull out the threaded plug therminals (1) in the operating unit. Lead the connecting cables through the cable glands (2).
7 Installation Wiring DANGER! In the case of devices with a separate sensor, for every instrument, the transmitter and the separate sensor are matched to one another at the factory. When connecting the components, ensure that the production number of the external sensor (on the flag tag on the connecting cable) is identical to the production number of the transmitter (on the nameplate).
Page 31
7 Installation ATTENTION! In devices with a separate sensor and M12 plug / socket connectors, the screw terminals in the device are painted over. Removing this paint voids the warranty! SETUP Terminal assignment Symbol Supply Supply (with reverse-polarity protection) Outputs Analog signal output: conductivity/concentration (electrically isolated)
Page 32
7 Installation Terminal assignment Symbol Binary inputs Binary input E1 Binary input E2 7.2.2 Transmitter with electrical connection 83 (M12 plug-and-socket connection) Head transmitter Connector I Power supply and actual value output for conductivity/concentration M12 flush-type connector, 5-pin Blanking plug Connector II Actual value output for temperature, and binary input and switching outputs M12 flush-type connector, 8-pin...
Page 33
7 Installation ATTENTION! In devices with a separate sensor and M12 plug / socket connectors, the screw terminals in the device are painted over. Removing this paint voids the warranty! Supply Connector Assignment Symbol Supply (with reverse-polarity protection) Outputs Analog signal output: conductivity/concentration (electrically isolated) Analog signal output:...
PC are not electrolytically cou- pled to the ground (e.g. notebook should be used in battery mode). SETUP Voltage supply Device PC interface cable with USB/TTL converter, accessory LCI-INTER PC or notebook...
9 Commissioning CAUTION! The measuring transmitters are checked in the factory for flawless operabil- ity and shipped ready for operation. Head transmitter or transmitter with separate sensor Install the device, see "Mounting", page 18. Connect the device, see "Installation", page 30. DANGER! In the case of devices with a separate sensor (remote version), for every instrument, the transmitter and the separate sensor are matched to one...
10 Operation 10.1 Operating elements Graphical LC-display, background lit up. , confirm inputs, select menu. , interrupt inputs without saving/interrupt calibration. EXIT One menu-level back. , increase numerical value/forward the selection. , decrease numerical value/forward the selection. LEDs "K1"/"K2" indicate the status of the switching outputs. In normal operation, the LED flows when the corresponding switching output is active.
Page 37
10 Operation LC-Display (11) (10) Output K1 is active Output K2 is active Binary input 1 is triggered Binary input 2 is triggered Keyboard is locked Device status (hints) • Alarm (e.g. overrange • Calib. flashing (calibration timer • Calib (customer calibration enabled) Output mode •...
10 Operation 10.4 Measurement mode Depiction In the measurement mode, the conductivity compensated to the reference temperature, or the concentration, and the temperature of the measurement medium are displayed. MEASUREMENT -> Measurement mode 20.5 °C -> Temperature of the measurement medium 203 mS/cm ->...
Page 42
10 Operation 10.5.1 INPUT CONDUCTIVITY (Input conductivity) MEASUREMENT RANGE 1 ... 4 0 to 500 µS/cm 0 to 1000 µS/cm 0 to 2000 µS/cm 0 to 5000 µS/cm 0 to 10 mS/cm 0 to 20 mS/cm 0 to 50 mS/cm 0 to 100 mS/cm 0 to 200 mS/cm 0 to 500 mS/cm...
Page 43
10 Operation CONCENTR. MEASUREMENT NO FUNCT. NaOH HNO3 CUST. SPEC. (The input of the values is only possible with the optional Setup program) CONCENTR. RANGE In case of HNO 0 to 25 % by WEIGHT 36 to 82 % by WEIGHT In case of NaOH 0 to 15 % by WEIGHT 25 to 50 % by WEIGHT...
Page 44
10 Operation 10.5.2 OUTPUT CONDUCTIVITY. (Output conductivity) SIGNAL TYPE 0 to 20 mA 4 to 20 mA 20 to 0 mA 20 to 4 mA 0 to 10 V 2 to 10 V 10 to 0 V 10 to 2 V SCALING START 1 ...
Page 45
10 Operation 10.5.3 INFLOW TEMPERATURE UNIT °C °F MEASUREMENT VALUE ACQUISITION Sensor manual MANUAL SPECIFICATION -20.0 to 25.0 to 150.0 °C OFFSET -15.0 to 0.0 to +15.0 °C FILTERING TIME 00:00:00 to 00:00:01 to 00:00:25 H:M:S 10.5.4 OUTFLOW TEMPERATURE SIGNAL TYPE 0 to 20 mA 4 to 20 mA 20 to 0 mA...
Page 46
10 Operation MANUAL OPERATION MANUAL VALUE 0.0 to 4.0 to 22.0 mA (depending on the signal type) 0 to 10.7 V 10.5.5 OUTPUT BINARY 1 and OUTPUT BINARY 2 FUNCTION NO FUNCTION COND. MIN. COND. MAX. COND. AF1 COND. AF2 TEMP.
Page 47
10 Operation Wiper contact Wiper contact Triggering condition longer than Triggering condition shorter than pulse duration pulse duration LIMIT VALUE -20.0 to 999.0 (depending on the function, see above) HYSTERESIS 0.0 to 1.0 to 999.0 (depending on the function, see above) DISTANCE 0.0 to 999.0 (depending on the function, see above) MANUAL OPERATION...
Page 48
10 Operation 10.5.6 INPUT BINARY 1 and INPUT BINARY 2 FUNCTION NO FUNCTION KEYBOARD LOCK/HOLD MEASUREMENT RANGE./TEMP C. DESALINATION FUNCTION. Setting parameters binary input 1 binary input 2 Measurement range- / MB1/Tk1 open open Temperature- MB2/Tk2 closed open coefficient switching MB3/Tk3 open closed...
10 Operation 10.5.8 DEVICE DATA LANGUAGE GERMAN ENGLISH FRENCH SPANISH POLISH SWEDISH ITALIAN PORTUGUESE DUTCH RUSSIAN NOTE! By inputting the password 7485 in the Administrator level, the operating lan- guage is reset to English. CONTRAST 0 to 6 to 11 LIGHTING FOR OPERATION (about 50 s after the last keystroke,...
Page 50
10 Operation Levels of the Administrator level 10.6.1 Parameter level In this level, the Administrator can edit any parameter of the operator level. The structure of the parameter level in the Administrator level is identical to the operator level, see "Operating level", page 41 and onwards. 10.6.2 Release level In this level, the Administrator can determine which parameters the operator is permitted to modify in the operator level.
10 Operation 10.7 Calibration level In this level, the calibrations released by the Administrator (Administrator level) can be carried out. Press the key for longer than 3 seconds. With the keys , select "CALIBRATION-LEVEL". 10.7.1 REL. CELL CONSTANT. (relative cell constant) If this function has been released by the Administrator, the operator can cali- brate the relative cell constant of the device here;...
10 Operation 10.8 The desalination function Brief description In the case of cooling water, using the conductivity, the total salt content is assessed. Upon reaching a limiting conductivity (at maximum permissible salt concentration/densification), dilution of the cooling water is necessary. For this purpose, a desalination valve is opened, densified water flows out and is sup- plemented with fresh water.
Page 53
10 Operation 10.8.1 Setting the desalination function All the parameters are plant-dependent and must be matched to the prevalent conditions. Press the key for longer than 3 seconds. With the keys , select the "OPERATOR LEVEL"; with key , con- firm the selection.
Page 54
10 Operation Use the key to switch to the operator level. EXIT With the key select "DESALINATION FUNCTION". With key , confirm the selection. Set the desalination reduction with the keys in the range from 1 to 10 to 50% below the actual limit value. with key , confirm the setting.
Page 55
10 Operation Set the locking time with the keys in the range from 0:00:00 to 00:01:00 to 18:00:00 H:M:S. with key , confirm the setting. NOTE! If there is a failure of the supply voltage during the running of the desalina- tion function, the function is canceled.
11 Calibration 11.1 General For increasing the accuracy, the device has various calibration options. NOTE! At regular intervals (depending on the measurement medium), the conduc- tivity sensor must be cleaned and calibrated. The LED "K1" flashes during the calibration. 11.2 Calibration of the relative cell constant In case of increased demands on the accuracy, the cell constant must first be calibrated.
Page 57
11 Calibration With the keys , select "REL. CELL CONSTANT.". with key confirm the selection. When the measured value is stable, press the key. With the keys , correct the displayed uncompensated conductiv- ity value to the conductivity value of the reference solution. Press the key.
11 Calibration 11.3 Calibration of the temperature coefficient of the mea- surement solution 11.3.1 Linear temperature coefficient (ALPHA) The conductivity of any measurement solution changes according it its spe- cific temperature coefficient. We therefore recommend carrying out the calibration of the temperature coef- ficient Precondition •...
Page 59
11 Calibration With the keys , input the operating temperature and confirm with key . NOTE! The operating temperature must be at least 5 °C above or below the refer- ence temperature (25.0 °C). The LC-Display now shows the selected operating temperature (flashing) the reference temperature (flashing) the current sensor temperature (static) Heat the measurement medium till both the reference temperature as well...
Page 60
11 Calibration The LC-display now shows the determined temperature coefficient in %/K. Accept the temperature coefficient determined -> press the key for longer than 3 seconds, or discard the value -> press the key EXIT The transmitter is in the "Calibration menu". Press key EXIT The transmitter is in "Measurement mode"...
Page 61
11 Calibration 11.3.2 Non-linear temperature coefficient (ALPHA) General Since the temperature coefficient of some media is not constant over a larger temperature range, the device has the facility to divide a temperature range to T ) into 5 sub-ranges. In each of these ranges, compensation can start be carried out with different TC values.
Page 62
11 Calibration TC-curve Temperature compensation with the TC-curve With the help of the current medium temperature, the corresponding tempera- ture coefficient is determined from the TC curve, see "TC-curve", page 63. Intermediate values, e.g. (α in the case of T ) between two determined values (α...
Page 63
11 Calibration Sequence of the automatic calibration The TC curve is plotted automatically in a temperature range determined by the user. Here, the temperature range from the starting to the final temperature is divided into 5 equal sections. The temperature range must be greater than 20 Kelvin and overlap the refer- ence temperature.
Page 64
11 Calibration With the keys , input the starting temperature and confirm with key . NOTE! The starting temperature must be below the reference temperature (25.0 °C). With the keys , input the final temperature and confirm with the key . NOTE! The final temperature must be at least 20 °C above the starting temperature.
Page 65
11 Calibration Heat the measurement medium till the flashing temperature is exceeded or undershot. The next temperature to be reached is displayed flashing. CAUTION! During the calibration, the temperature changing speed of the measurement solution of 10 K/min in the case of the device with a free-standing temperature sensor 1 K/min in the case of the device with an integrated temperature sensor must not be exceeded.
12 Maintenance 12.1 Conductivity-clean sensor CAUTION! Do not use any solvents. Stubborn sediments or deposits can be dissolved with dilute hydrochloric acid and removed. Comply with the safety specifications. Deposits Deposits on the sensor part can be removed with a soft brush (e.g. bottle brush).
13 Rectifying errors and faults Error possibilities Problem Possible cause Measure No display of measured value Voltage supply absent Check voltage supply, check terminals signal output Measured value display Sensor not submerged in me- Fill up tank 000 or dium; signal output 0 % Tank level too low (e.g.
13 Rectifying errors and faults 13.1 Device checking General The device is calibrated at the factory and is maintenance-free. If measure- ment value variations from unknown causes should occur nonetheless, the transmitter can be checked as follows. 13.1.1 Checking with resistance loop Cell constant CAUTION! The cell constant of the device depends on the design type!
Page 69
13 Rectifying errors and faults Connect the resistance R to the wire Calculation of the resistance Formula for calculation of the resistance of the resistance loop: · K Resistance of the resistance loop Number of turns in the loop Cell constant desired display in S/cm Remark: 1 mS/cm = 1·10...
Page 70
13 Rectifying errors and faults Pre-calculated values The display value 0 is reached when the following conditions are met: • The sensor is dry • The sensor is free of any conducting coats • No resistance loop is mounted. Display at No.
Page 71
13 Rectifying errors and faults 13.1.2 Testing with reference fluid Put in test solution Carry out test Prepare the conductivity test solution in a sufficiently large container Connect the device electrically, see chapter 7 "Installation", page 30. Select the measurement range according to the conductivity test solution, see chapter 10.5.1 "INPUT CONDUCTIVITY (Input conductivity)", page 44 - >...
Page 72
13 Rectifying errors and faults 13.1.3 Testing with reference measuring instrument Put in test solution Carry out test Prepare the conductivity test solution in a sufficiently large container Connect the device electrically, see chapter 7 "Installation", page 30. Select the measurement range according to the conductivity test solution, see chapter 10.5.1 "INPUT CONDUCTIVITY (Input conductivity)", page 44 - >...
14 Annex 14.1 Before configuring If many parameters of the device are to be re-configured, it is advisable to make a note of all the parameters to be changed in the following table, and to process the parameters in the given sequence. NOTE! The following list shows the maximum number of modifiable parameters.
Page 74
14 Annex Parameter Selection/Range of values New setting see page Factory setting Signal type 0 to 20 mA 4 to 20 mA 20 to 0 mA 20 to 4 mA 0 to 10 V 2 to 10 V 10 to 0 V 10 to 2 V Scaling, beginning 0 to 90 % = 4 mA (e.g.)
Page 75
14 Annex Parameter Selection/Range of values New setting see page Factory setting In case of an alarm high safety value At the time of calibration accompanying frozen safety value Safety value 0.0 to 4.0 to 22.0 mA Manual operation Manual value 0.0 to 4.0 to 22.0 mA Output binary 1 or binary 2 Function...
Page 76
14 Annex Parameter Selection/Range of values New setting see page Factory setting Dosing time 00:00:00 to 00:01:00 to 18:00:00 H:M:S Locking time 00:00:00 to 00:01:00 to 18:00:00 H:M:S Device data Language German English French Spanish Polish Swedish Italian Portuguese Dutch Russian Contrast 0 to 6 to 11...
15 Disposal Note! • Avoid environmental damage caused by media-contaminated parts • Dispose of the device and packaging in an environmentally friendly manner • Comply with applicable national and international disposal regulations an d environmental regulations. Batteries Batteries containing pollutants are marked with a sign consisting of a crossed-out garbage can and the chemical symbol (Cd, Hg, Li or Pb) of the heavy metal that is decisive for the classification as containing pollutants: 1.
16 EU Declaration of Conformance We, KOBOLD Messring GmbH, Hofheim-Ts, Germany, declare under our sole responsibility that the product: Inductive Conductivity / Concentration and Temperature Transmitter Model: LCI-... to which this declaration relates is in conformity with the standards noted below:...
17 Index – – Alarm window In case of alarm 44-45, 74-75 At the time of calibration In case of alarm/calibration In case of hold Inflow temperature Input binary Biocide Input conductivity Input, conductivity Installation location Calculation of a temperature coefficient 43, 73 Inverse LCD Calibration interval...
Page 80
17 Index 47,75 Pulse duration Re-configuring Reduction Reference fluid Reference measuring instrument Reference temperature Relative cell constant Resistance loop – Safety value 74-75 Scaling 44-45,74 44-45,74 start Setting parameters Setup interface – Signal type Solvent Sunlight Switch-off delay 47,75 Switch-on delay TC-curve Temperature coefficient Temperature compensation...
Need help?
Do you have a question about the LCI and is the answer not in the manual?
Questions and answers