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B&C C 3436 Instruction Manual

Conductivity transmitter 4-20 ma-rs485
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Instruction manual
C 3436
CONDUCTIVITY TRASMITTER
4-20 mA – RS485
Conductivity scales
2 µS ÷ 2000 mS
Temperature scales
-10.0 ÷ 110.0 °C
14.0 ÷ 230.0 °F
Option
S/N
REP N°
Power supply: 9/36 Vdc
Installed firmware: R 1.0x
Cod. 27363341 Revisione 01

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  • Page 1 Instruction manual C 3436 CONDUCTIVITY TRASMITTER 4-20 mA – RS485 Conductivity scales 2 µS ÷ 2000 mS Temperature scales -10.0 ÷ 110.0 °C 14.0 ÷ 230.0 °F Option REP N° Power supply: 9/36 Vdc Installed firmware: R 1.0x Cod. 27363341 Revisione 01...

  • Page 3: Table Of Contents

    C 3436 INDEX INDEX 1 – PRODUCT OVERVIEW 1.1 Functional purpose of the device ............5 1.2 Operating principles ............... 5 1.3 Accessories .................. 6 2 – GENERAL WARNINGS AND INFORMATION FOR ALL USERS 2.1 Warranty ..................10 2.2 After sales service ................. 10 2.3 CE marking .................
  • Page 4 C 3436 INDEX 5.5.5 Temperature calibration ............29 5.5.6 Setup ................29 5.5.7 Maintenance of the transmitter ..........30 5.5.8 Maintenance of the sensor ............30 5.6 Installation instruction ..............30 5.6.1 Safety requirements ............. 30 5.6.2 Configuration ..............31 6 –...
  • Page 5 C 3436 INDEX 7.6.1 Connection of the measuring cell ..........45 7.6.2 Connection of the temperature sensor ........45 7.6.3 Connection of the current loop ..........46 7.6.4 Connection of the logic input ..........46 7.6.5 Connection to the RS485 serial port .......... 46 7.7 Disposal ..................
  • Page 6 C 3436 INDEX - 4 - Cod. 27363341 Revisione 01...

  • Page 7: Product Overview

    C 3436 PRODUCT OVERVIEW PRODUCT OVERVIEW FUNCTIONAL PURPOSE OF THE DEVICE The system for the monitoring of conductivity consists of two main parts: • the transmitter object of this instruction manual; • the conductivity cell. The instrument operates in analog and/or digital functionality.

  • Page 8: Accessories

    C 3436 PRODUCT OVERVIEW The conductivity measurement is carried out using a cell with 2 or 4 electrodes featur- ing defined geometric dimensions, completely surrounded by the liquid, to which is ap- plied an alternating voltage of suitable frequency to avoid polarization of the same caused by electrochemical effects.
  • Page 9 C 3436 PRODUCT OVERVIEW SZ 3320.1 SZ 3330.1 SZ 3300.1 SZ 3350.1 SZ 3360.1 4 electrodes conductivity cells SI 311 SZ 3134.1 SI31011 SI31012 Cod. 27363341 Revisione 01 - 7 -...
  • Page 10 C 3436 PRODUCT OVERVIEW Holders SZ 810 for use in immersion in PVC, L=210 mm SZ 820 for use in immersion in PVC, L=400 mm SZ 821 for use in immersion in PVDF, L=400 mm SZ 860 for use in immersion in PVC, L=720 mm...
  • Page 11 C 3436 PRODUCT OVERVIEW BC 9408 IP65 enclosure for 1 or 2 instruments BC 9412 IP65 enclosure for 3 instruments SZ 740 IP65 junction box SZ 911 stopper SZ 927.1 multiwired shielded special cable Cod. 27363341 Revisione 01 - 9 -...

  • Page 12: General Warnings And Information For All Users

    C 3436 GENERAL WARNINGS AND INFORMATION FOR ALL USERS GENERAL WARNINGS AND INFORMATION FOR ALL USERS WARRANTY This product is guaranteed for all manufacturing defects. Please take a look at the terms and conditions described on the warranty certificate at the end of the manual.

  • Page 13: Instruction Manual Contents

    C 3436 INSTRUCTION MANUAL CONTENTS INSTRUCTION MANUAL CONTENTS This chapter describes the manual and gives suggestions to all users on how to read it and use it. The manual is written according to the following norms: • UNI 10893 "Instructions for use";...

  • Page 14: Using The Instrument On The Plant

    C 3436 INSTRUCTION MANUAL CONTENTS The user is normally interested on the display and will have to re- fer to the chapter: - "Instruction for the user (page 24)". The maintainer of the system, will be more interested in the chapters of the manual concerning: - "Instruction for the user (page 24)";...

  • Page 15: Instrument Installation

    C 3436 INSTRUCTION MANUAL CONTENTS – response time of the filter software; • to modify the password to access the setup. 3.3.3 INSTRUMENT INSTALLATION The plant engineer, by inserting the access password and by setting and modifying the configuration parameters, will be able to select the necessary functions required by the plant.

  • Page 16: Specifications

    C 3436 SPECIFICATIONS SPECIFICATIONS FUNCTIONAL SPECIFICATION Display The instrument is equipped with an alphanumeric LCD display 8x1 characters. The display shows the measured values and messages which guide the operator in the use of the instrument. The message scrolls across the display and begin with the identification number report- ed to the technical specifications.
  • Page 17 C 3436 SPECIFICATIONS Analog output The instrument operates in the current loop 4-20 mA proportional to the value of the principal measure. The output is galvanically isolated, so to be interfaced directly to a PLC or data acqui- sition cards.
  • Page 18 C 3436 SPECIFICATIONS • the TDS enable and the conversion factor EC/TDS; • the current loop enable; • the baud rate of the RS485 interface; • the ID for communication protocols Modbus or B&C; • a new value of the access password.

  • Page 19: Technical Specifications

    C 3436 SPECIFICATIONS TECHNICAL SPECIFICATIONS In the left column indicates the number of the display concerned: - SETUP parameters are indicated by "S xy" - CONFIGURATION parameters are indicated with "C xy" where x = paragraph y = sequential 1..2..3..4..ecc Default D1.0...
  • Page 20 C 3436 SPECIFICATIONS Default D1.0 MEAN MEASURE S1.2 RT 90 % Large Signal RT 90 % Small 1 ÷ 20 s 10 s Signal Measure update 0.5 s D1.1 Zero ±10 % of the scale Calibration the zero calibration is done automatically on all scales from the lowest one D1.2...
  • Page 21 C 3436 SPECIFICATIONS Default D1.0 MEAN MEASURE 2000 mS 1000 ppt 1 ppt Under range -<<<< ppm / ppt Over range >>>> ppm / ppt Default D2.0 SECONDARY MEASURE D2.0 Measure Temperature Input RTD Pt100 3 wires S2.1 Measuring unit °C / °F...
  • Page 22 C 3436 SPECIFICATIONS Default CURRENT LOOP • Scale 4 14 mA at switching on for 8" • Scale 5 15 mA at switching on for 8" Default DIGITAL OPERATION Protocols B&C protocol ASCII / Modbus RTU The two protocols can coexist C8.2...
  • Page 23 C 3436 SPECIFICATIONS Default D60.0 CONFIGURATION 60.1 Password to access the configura- 000 ÷ 999 tion C1.1 K of cell 0.1 / 0.5 / 1.0 / 10 C1.2 Conductivity scales K=0.1 2.000 / 20.00 / 200.0 / 2000 µS 20.00 mS K=0.5...

  • Page 24: General Specifications

    C 3436 SPECIFICATIONS 4.2.1 GENERAL SPECIFICATIONS Room temperature 0 °C ÷ +50 °C Relative humidity up to 95 % without condensation Protection of transmitter IP40 Weight 250 g Dimensions 71 x 95 x 58 mm Mounting Rail din 4 modules...

  • Page 25: Operating Procedure

    C 3436 OPERATING PROCEDURE OPERATING PROCEDURE DISPLAY KEYS FUNCTION Key MODE/ZERO - Visualise the sequence of the functions - Exit without changing the visualized value - >3s Start the zero calibration Key UP/SENS - Increase the value - Access to the parameter changing - >3s Start the sensitivity calibration...

  • Page 26: Operating Modes

    C 3436 OPERATING PROCEDURE OPERATING MODES The transmitter can be configured to operate in analog mode (current loop 4-20 mA = Enable). The digital mode is always active. The transmitter in the analog mode (current loop) can be connected to a PLC or B&C Electronics instruments BC 7335 - BC7635 - BC7687 - BC6587, which provide power to the transmitter and allow the display of the measurement.

  • Page 27: Parameters Reserved To The Plant Maintainer

    C 3436 OPERATING PROCEDURE From this display the user can access the calibration procedure of the temperature probe if this has not been reserved to the maintainer. 5.4.4 PARAMETERS RESERVED TO THE PLANT MAINTAINER From this display the user can access the maintenance menu of the instrument (setup) via password.

  • Page 28: Making Measurements

    C 3436 OPERATING PROCEDURE 5.5.2 MAKING MEASUREMENTS To operate the system installed, verify the connection of the following components: • the conductivity cell and the eventual RTD in contact with the liquid under test; • the logic input if necessary;...
  • Page 29 C 3436 OPERATING PROCEDURE UP (SENS) by pressing this button for more than 3 seconds, the message will Sens Cal appear alternately to the actual conductivity value or if the calibration was Cal lock inhibited in the setup (Display S1.1).

  • Page 30: Tds Calibration

    C 3436 OPERATING PROCEDURE The two error messages provided by the instrument during the calibration indicate that the cell is in unacceptable operating con- dition (and therefore risky for the plant). In fact, a zero deviation > 10 % Zero Err is an indication of ex- cessive electrodes pollution or problems on the cable.
  • Page 31 C 3436 OPERATING PROCEDURE 5.5.5 TEMPERATURE CALIBRATION It can be made when the Pt100 sensor is connected. Immerse the Pt100 in a liquid or keep the sensor in the air knowing the value of the tem- perature. MODE press the key from the main display to go to D2.0 display...
  • Page 32 C 3436 OPERATING PROCEDURE Display Contenuto Meaning Possible values S2.4 Temperature coeffcient 0.00 ÷ 3.50 %/ Temp. Co °C S50.0 Password setting 000 ÷ 999 Set-up 5.5.7 MAINTENANCE OF THE TRANSMITTER The use of electronic components of high quality gives the instrument characteristics of great reliability.
  • Page 33 C 3436 OPERATING PROCEDURE 5.6.2 CONFIGURATION MODE press the key three times from 1.0 display to get the message Config. (display 50.0). press the key to scroll through the configuration parameters UP e DOWN press the key to change the value or the option visualized on the display.
  • Page 34 C 3436 DIGITAL OPERATION DIGITAL OPERATION Two protocol types are available: • B&C (ASCII) protocol; • Modbus RTU protocol (only function 03). B&C ASCII COMMUNICATION PROTOCOL Transmission mode Code set ASCII Number of bits per character: - start bits - data bits...
  • Page 35 C 3436 DIGITAL OPERATION By sending the command H displays the list of available commands with a brief descrip- tion of their meaning. 6.2.2 ACQUISITION Command format: ID + A <cr> ]Example: if ID=14 type 14A <cr> or 00A <cr>...
  • Page 36 C 3436 DIGITAL OPERATION Below are transmitted the parameter values measured by the transmitter with the fol- lowing format: Measuring - Sign of measure (if positive is sent a blank) - Value of measure (6 characters - right alignment) Campo U. di m...
  • Page 37 C 3436 DIGITAL OPERATION Response of the unit: <lf> ID + K + x <cr> <lf> comando eseguito correttamente Response of the unit: none command failed The K cell can be set with the following values : x=1 K cella = 0.1 x=2 K cella = 0.5...
  • Page 38 C 3436 DIGITAL OPERATION Response of the unit: <lf> ID + R + x <cr> <lf> command executed correctly Response of the unit: none command failed To check whether the entered value has been received, type command H. 6.2.8 TEMPERATURE MEASURING UNIT Command format: ID + W + x <cr>...
  • Page 39 C 3436 DIGITAL OPERATION Verify the outcome of the operation with the command ID + H and check the line "Temp. adjust: not done". 6.2.11 TEST OF THE TEMPERATURE ADJUSTMENT Command format: ID + J? <cr> Example: if ID=14 type 14J? <cr> or 00J? <cr>...
  • Page 40 C 3436 DIGITAL OPERATION Response of the unit: none command failed To check whether the entered value has been received, type command H. 6.2.15 STANDARD SOLUTION Command format: ID + T + x <cr> Example: if ID=14 and the standard solution value is 1413 µS type 14T1413 <cr> or 00T1413 <cr>...
  • Page 41 C 3436 DIGITAL OPERATION The message "Zero calibration: not done" indicates that the parameter has been re- stored to the default value with the command ID + ZR. 6.2.18 ZERO RESET Command format: ID + ZR <cr> Example: if ID=14 type 14ZR <cr> or 00ZR <cr>...
  • Page 42 C 3436 DIGITAL OPERATION Through the command ID + S? the user can read the result directly. Through the command ID + H the user controls the lines lines: "Zero. calibration: ok / error"; "Sens. calibration: ok / error". If the calibration has failed (error) check that the conductivity cell is properly immersed in the standard solution.
  • Page 43 C 3436 DIGITAL OPERATION This command allows to store the last calibration date. The date field is 8 characters to be written in any format and syntax. 6.2.24 ID OF THE B&C PROTOCOL Command format: ID + I + x <cr>...
  • Page 44 C 3436 DIGITAL OPERATION MODBUS PROTOCOL On the transmitter, in addition to the ASCII B&C protocol, is implemented the Modbus RTU protocol limited to the function 03. In Modbus communication network the transmitter operates as a slave device. RTU transmission mode...
  • Page 45 C 3436 DIGITAL OPERATION 6.3.1 MODBUS FUNCTION 03 Function 03 (MASTER QUERY) Address 1 byte 01 ÷ 32 (ID transmitter) Function 1 byte 03 (read holding register) Start address data HI 1 byte Start address of registers Start address data LO...
  • Page 46 C 3436 INSTALLATION INSTALLATION PACKING LIST The instrument package contains: • The instrument with s/n label; • The instruction manual in Italian language. UNPACKING AND REPACKING OF THE UNIT Remove from the carton box the instruction manual. Open the box and remove the instrument wrapped in clear plastic guard.
  • Page 47 C 3436 INSTALLATION Check that the type of cell is appropriate for the selected range, and that the cable is adequate for the distance between the cell and the instrument. Low conductivity values may require the use of a special cable (eg . the model SZ 927.1) and special connection with the instruments installed at large distances from the cell.
  • Page 48 C 3436 INSTALLATION Three wire Pt100 connection for great distances • Connect a Pt100 wire to the 13 instrument terminal. • Connect one common wirel of the Pt100 to terminal 14 and the other common wire to terminal 15 (use two separate wires).
  • Page 49 C 3436 INSTALLATION DRAWINGS INSTALLATION DRAWINGS CONNECTIONS Terminal Function + Loop - Loop (9/36 Vdc) RS485 A+ RS485 B- RS485 Gnd Digital input Digital input A (EC) B (EC) C (EC) D (EC) T1 (Pt100) T2 (common Pt100) T0 (common Pt100) (Gnd measure) Cod.
  • Page 50 C 3436 INSTALLATION DRAWINGS DIMENSIONS - 48 - Cod. 27363341 Revisione 01...
  • Page 51 C 3436 INSTALLATION DRAWINGS SINGLE INSTRUMENT CONNECTION Cod. 27363341 Revisione 01 - 49 -...
  • Page 52 C 3436 INSTALLATION DRAWINGS RS485 NETWORK CONNECTION - 50 - Cod. 27363341 Revisione 01...
  • Page 53 C 3436 WARRANTY WARRANTY Your product is guaranteed for 5 years from the date of purchase, for failure due to manufacturing defects. The warranty is void in case of tampering or deterioration due to improper instal- lation or maintenance. The warranty covers only free repair at the laboratories of the manufacturer.
  • Page 54 C 3436 REPAIRS INFORMATION SHEET for service repairs In the event of a fault, we recommend you contact our repair service, to photocopy and complete this information sheet to be attached to the product to be repaired. □ ESTIMATE □ REPAIR...
  • Page 56 B&C Electronics s.r.l. – Via per Villanova 3 – 20866 Carnate (MB) – Italia Tel. +39 039 631 721 – Fax +39 039 607 6099 – bc@bc-electronics.it – www.bc-electronics.it...

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