YOKOGAWA FLXA402 User Manual
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YOKOGAWA FLXA402 User Manual

4-wire converter opeartion of isc
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User's
Manual
Model FLXA402
4-Wire Converter
Opeartion of ISC
IM 12A01F04-01EN
IM 12A01F04-01EN
1st Edition

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Summary of Contents for YOKOGAWA FLXA402

  • Page 1 User’s Manual Model FLXA402 4-Wire Converter Opeartion of ISC IM 12A01F04-01EN IM 12A01F04-01EN 1st Edition...

  • Page 2: Introduction

    402 4-Wire Converter. This Instructor’s Manual contains all essential information for the user to make full use of FLXA402. Please read the following respective documents before installing and using the FLXA402. The related documents are listed as follows. General Specifications...
  • Page 3 • No part of the user’s manuals may be transferred or reproduced without prior written consent from YOKOGAWA. • YOKOGAWA reserves the right to make improvements in the user’s manuals and product at any time, without notice or obligation. • If you have any questions, or you find mistakes or omissions in the user’s manuals, please contact our sales representative or your local distributor.
  • Page 4 Terminology sensor(s): sensors, sensors with SA11, sensor module(s) SENCOM SA SA11, SENCOM Smart Adapter or “-S5” (SENCOM SA) of 1st or 2nd input analog sensor (module) selectable sensors when -P1/-C1/-C5/-D1 is specified for 1st or 2nd input, e.g. SC4AJ, SC8SG, SC210G NE107: NAMUR NE107 see the section 4.7 Error settings in...
  • Page 5 Blank Page...

  • Page 6: Table Of Contents

    Toc-1 Model FLXA402 4-Wire Converter Operation of ISC IM 12A01F04-01EN 1st Edition CONTENTS Introduction ....................i Sensor Menu Outline ................1-1 Sensor menu ..................... 2-1 Details ......................... 2-2 Calibration ......................2-6 Reset wellness ....................2-6 Reset ........................2-7 Sensor settings ....................2-7 Sensor setting ...................
  • Page 7 Toc-2 IM 12A01F04-01EN 1st Edition : Nov. 20, 2018-00...

  • Page 8: Sensor Menu Outline

    <1. Sensor Menu Outline> Sensor Menu Outline Main/Home screen > “Sensor menu”. > “Detail”, “Calibration”, “Setting” are available. The operation is secured by password. See IM “Operation of Converter”. Sample image of “Sensor menu” Sensor detail On Sensor menu, tap “Detail”.
  • Page 9 <1. Sensor Menu Outline> Configure sensor Converter menu or Sensor menu > “Setting” Go to Converter menu to configure the setting of converter such as mA output, display setting. Go to Sensor menu to configure the sensor related setting such as calibration setting. Figure 1.4 Sensor configuration (parameter list) Select a parameter to change.

  • Page 10: Sensor Menu

    <2. Sensor Menu> Sensor menu Main screen > Sensor menu The following operation are available. Detail (details on sensors) Calibration (sensor calibration) Setting (sensor setting) etc. Figure 2.1 Sensor menu (sample) IM 12A01F04-01EN 1st Edition : Nov. 20, 2018-00...

  • Page 11: Details

    In case of trouble, when you contact Yokogawa service, please inform us of the module and FLXA402 software revision displayed on the Detail and module production number, revision number indicated on the nameplate attached to the instrument.
  • Page 12 <2. Sensor Menu> The number of log page goes as many as the connected sensors. Measurement value c.c. (factory) This parameter displays the cell constant. (factory setting) The cell constant (factory setting) is determined by factory calibration made during sensor manufacturing.
  • Page 13 <2. Sensor Menu> SENCOM Sensor status The status of the sensor is displayed. Max temp. exposed Displays the maximum temperature, which is automatically updated every time a higher temperature is measured. Sterilization Displays the number of times the temperature remains above the preset value for at least the prescribed time period (min.).
  • Page 14 <2. Sensor Menu> Predict. maintenance Last calibrated at Date on which the last sensor calibration was performed. The displayed value of “ c.c.(adjusted)” is renewed to the date and time of last calibration. Calibration due at Date when the calibration must be done next according to the settings of the calibration interval. To set the calibration intervals, go to Sensor menu >...

  • Page 15: Calibration

    <2. Sensor Menu> Calibration Sensor menu > Calibration . Read Chapter 5. Figure 2.5 Calibration selection If you have a password, a prompt dialog box appears to input your password. After the password is verified, the page shifts to Calibration. For password, see 5.4 in IM 12A01F01-03EN Operation of Converter.

  • Page 16: Reset

    <2. Sensor Menu> Reset Sensor menu > Reset The screen jumps to Load SC config. File screen. While Wash is in progress, “Reset” is invalid. Even if you tap the icon, you will not jump to the sensor reset screen. Figure 2.7 Sensor reset In the box of File name, name of defined sensor config.
  • Page 17 Blank Page...

  • Page 18: Sensor Setting

    When you configure each setting, fill in User setting table we provide, and keep it in safe place. Download the user setting table from our website below. http://www.yokogawa.com/an/flxa402/download/ Configure sensor setting Go to Main screen > Sensor menu > Sensor setting You can confirm or edit the setting.

  • Page 19: Configure Sensor

    <3. Sensor Setting> Configure sensor Configure the setting of sensors, which connects to FLXA402. 3.1.1 Sensor setting Measuring unit Either /cm or /m can be chosen here. The process values will be expressed in S/cm or S/m in conductivity mode.
  • Page 20 <3. Sensor Setting> ● TC This method uses the linear compensation function. For how to calculate a temperature coefficient of the compensation function, see “n Temperature compensation” on page App.1-1 ● NaCl This method uses the standard temperature compensation function with NaCl solution. For details, see “n NaCl (standard temperature compensation)”...

  • Page 21: Temperature Settings

    <3. Sensor Setting> Concentration Concentration can be calculated from conductivity (SC1). Concentration-TC1 allows two method of conversion “Temp. comp. matrix” or “Table and SC1.” • By using the temperature compensation matrix The concentration can be obtained from the temperature compensation matrix (based on the relation between the conductivity at the reference temperature and the concentration).

  • Page 22: Concentration Table

    <3. Sensor Setting> Manual temp. When Manual is selected on the Temperature compensation, a process temperature should be set in the “Manual temp.” Reference temp. Set a reference temperature to which the measured value must be compensated. Normally 25°C is used, so this temperature is chosen as the default value. NOTE Reference temperature here is used when the temperature compensation is “TC”, “NaCl”, “Matrix (specific solution)”.

  • Page 23: High/Low Alarm Setting

    <3. Sensor Setting> 3.2.5 High/Low alarm setting Alarms from sensors are sorted out to “Device fail”, “Device status”, “Measure alarm”, “Sensor status”. Setup High/Low alarm setting of main measurement value on Measure alarm. For details on alamrs, see 4.7 in IM 12A01F01-03EN Operation of converter.

  • Page 24: Calibration Settings

    <3. Sensor Setting> Calibration settings 3.3.1 Limits and timing Air adjust limit (A) To avoid cable influences on the measurement, a “zero” calibration with a dry sensor may be done. To eliminate the capacitive influence of the cables, use dry sensor for zero calibration. When BA20 terminal junction box and WF10J extension cable are used, carry out the zero calibration while these are being connected.

  • Page 25: Cal. Set Temperature

    C=current temperature offset Note • Check A(actual value) on other devices. • B is a value displayed on FLXA402 process. • C (current temperature offset) is confirmed on Temp. offset screen. NOTE Use this function when a calibration is invalid.

  • Page 26: Wellness Settings

    <3. Sensor Setting> Wellness settings This screen is used to set items relating to sensor diagnostics displayed on the Sensor wellness. Gauges are displayed for only parameters that have been enabled in “Sensor diag. settings.”Parameters set to Disable are provided with a bar display. Figure 3.2 Sensor wellness The setting parameters include “Progress Time”, “Heat cycle”.
  • Page 27 Blank Page...

  • Page 28: Calibration Of Isc (Inductive Conductivity)

    NOTE The standard instrument to be used in calibration with a process solution should always be accurate. Yokogawa recommends that the Model SC72 pocket conductivity meter be used for this purpose. IM 12A01F04-01EN...
  • Page 29 Figure 4.2 Sample of Calibration trend If FLXA402 detects any sensor fault such as damage on temperature electrode, no calibration is implemented. Where temperature compensation 1 (SC1) and temperature compensation 2 (SC2) are configured, the configured temperature compensation is effective even during calibration.
  • Page 30 <4. Calibration of ISC> Cell constant The center value of the cell constant of the ISC40 sensor is 1.88 cm . The nominal cell constants of individual sensors are indicated on the cable markers and the actual installation can change this factor.

  • Page 31: Cell Constant (Manual)

    <4. Calibration of ISC> Cell constant (manual) The intention of this calibration routine is to fine-tune a sensor for which only the nominal cell constant is known, or to recalibrate a sensor that has been changed (or damaged) during operation. Choose the 1st or 2nd temperature compensation to suit the calibration solution used.

  • Page 32: Air Calibration

    The standard conductivity meter to be used should always be based on the accurate and same temperature compensation calculation method. Yokogawa recommends that the Model SC72 pocket conductivity meter be used for this purpose.

  • Page 33: Temperature Coefficient

    Simply input the solution conductivity at the reference temperature (TR) after allowing the sensor to stabilize at elevated temperatures. The FLXA402 calculates the temperature coefficient. The ideal temperature for this calibration is the normal process value (TP). This calibration is enabled if the Temperature Compensation is set to “TC.”...

  • Page 34: Appendix For Isc (Inductive Conductivity)

    NaCl (standard temperature compensation) The FLXA402 has the default temperature compensation function based on a sodium chloride (NaCl) solution. This function can be used for various applications and is compatible with the NaCl compensation function of typical laboratory or portable instruments.
  • Page 35 App.1-2 <Appendix 1 For ISC (Inductive Conductivity)> A. Calculation of temperature coefficient factor (With known conductivity at reference temperature). α = T - T α = Temperature compensation factor in %/°C = Measured temperature in °C = Conductivity at T = Reference temperature = Conductivity at T B.
  • Page 36 α = 124.5x(31.0 - 25) - 147.6x(18.0 - 25) Set the temperature coefficient in the FLXA402 converter. When the temperature coefficient already set is accurate, the conductivity to be displayed must be constant regardless of liquid temperature. The following check will make sure that the temperature coefficient already set is accurate.
  • Page 37 App.1-4 <Appendix 1 For ISC (Inductive Conductivity)> Matrix Matrix means temperature compensation with the temperature compensation matrix. The temperature compensation matrix is a table of conductivity values at different temperatures and concentrations. Ready-made matrixes and user-defined matrixes are available. <Ready-made matrixes> Ready-made temperature compensation matrixes are available for common inorganic acids and bases.
  • Page 38 App.1-5 <Appendix 1 For ISC (Inductive Conductivity)> Table B NaOH 0..15%(Conductivity unit: S/cm) Solut. Solu- Solu- Solu- Solu- Solu- Solu- Solu- Solu- Solut. Solutions Min. tion 2 tion 3 tion 4 tion 5 tion 6 tion 7 tion 8 tion 9 Max.
  • Page 39 App.1-6 <Appendix 1 For ISC (Inductive Conductivity)> Table E H 0..27% (Conductivity unit: S/cm) Solut. Solu- Solu- Solu- Solu- Solu- Solu- Solu- Solu- Solut. Solutions Min. tion 2 tion 3 tion 4 tion 5 tion 6 tion 7 tion 8 tion 9 Max.
  • Page 40 App.1-7 <Appendix 1 For ISC (Inductive Conductivity)> Table H HCl 0..18% (Conductivity unit: S/cm) Solut. Solu- Solu- Solu- Solu- Solu- Solu- Solu- Solu- Solut. Solutions Min. tion 2 tion 3 tion 4 tion 5 tion 6 tion 7 tion 8 tion 9 Max.
  • Page 41 App.1-8 <Appendix 1 For ISC (Inductive Conductivity)> Table K HNO 0..25% (Conductivity unit: S/cm) Solut. Solu- Solu- Solu- Solu- Solu- Solu- Solu- Solu- Solut. Solutions Min. tion 2 tion 3 tion 4 tion 5 tion 6 tion 7 tion 8 tion 9 Max.
  • Page 42 App.1-9 <Appendix 1 For ISC (Inductive Conductivity)> <User-defined matrixes> The user-defined temperature compensation matrix is defined by users. Enter values as shown in Table 3. Table 3 Example of user-defined matrix (Reference temperature (Tref.): 25.0 ˚C, Conductivity unit: S/cm) Solut. Solut.
  • Page 43 It can also appear to change because of coating of the electrodes, or partial blockage. It does not make sense to regularly recalibrate the FLXA402. A calibration check, however, is another matter. When the objective is clearly defined as a diagnostic exercise a regular check can bring an extra level of security and confidence to the measurement.
  • Page 44 App.1-11 <Appendix 1 For ISC (Inductive Conductivity)> FLXA402 is programmed with the following table of conductivity of Potassium Chloride (KCl) solutions at 25°C. This is used in the Automatic Cell Constant setting calibration feature. (See section 11.2) The table is derived from the Standards laid down in “International Recommendation No.
  • Page 45 App.1-12 <Appendix 1 For ISC (Inductive Conductivity)> Measurement principle Contrary to contact electrode conductivity, the EXA ISC Series analyses the conductivity with out any contact between electrodes and process fluid. The measurement is based on inductive coupling of 2 ring trans form ers (Toroids) by the liquid. Receive coil drive coil ×G...

  • Page 46: Revision Record

    Revision Record Manual Title : Model FLXA402 4-Wire Converter Operation of ISC Manual No. : IM 12A01F04-01EN Nov. 2018/1st Edition Newly published IM 12A01F04-01EN 1st Edition : Nov. 20, 2018-00...
  • Page 47 Blank Page Yokogawa Electric Corporation 2-9-32 Nakacho, Musashino-shi, Tokyo 180-8750, JAPAN Homepage: http://www.yokogawa.com/...

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