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YOKOGAWA SC8SG User Manual
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YOKOGAWA SC8SG User Manual

YOKOGAWA SC8SG User Manual

Conductivity detector
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User's
Manual
CONDUCTIVITY METERING SYSTEM
Model SC8SG
CONDUCTIVITY DETECTOR
IM 12D08G02-01E
IM 12D08G02-01E
8th Edition

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Summary of Contents for YOKOGAWA SC8SG

  • Page 1 User’s Manual CONDUCTIVITY METERING SYSTEM Model SC8SG CONDUCTIVITY DETECTOR IM 12D08G02-01E IM 12D08G02-01E 8th Edition...
  • Page 2 They can be more consistent and accurate both with solutions with high impurities or liquids of high conductivities. The SC8SG detector may be inserted into the process piping for direct measurement of process liquids, or a sample of the liquid may be obtained via a piping connection.
  • Page 3 The product is provided on an “as is” basis. YOKOGAWA shall have neither liability nor responsibility to any person or entity with respect to any direct or indirect loss or damage arising from using the product or any defect of the product that YOKOGAWA can not predict in advance. Notes on Handling User’s Manuals •...
  • Page 4 < Introduction > Drawing Conventions Some drawings may be partially emphasized, simplified, or omitted, for the convenience of description. Some screen images depicted in the user’s manual may have different display positions or character types (e.g., the upper / lower case). Also note that some of the images contained in this user’s manual are display examples.
  • Page 5 If we replace the product with a new one, we won’t provide you with a repair report. l Yokogawa warrants the product for the period stated in the pre-purchase quotation Yokogawa shall conduct defined warranty service based on its standard. When the customer site is located outside of the service area, a fee for dispatching the maintenance engineer will be charged to the customer.
  • Page 6  For the safe use of this equipment .............ii  After-sales Warranty ...................iv  General ...................... 1-1 Features of SC8SG Conductivity Detector ............ 1-1 1.2 Specifications ....................1-2 1.2.1 Standard Specifications ..............1-2 1.2.2 Model and Suffix Codes ..............1-4 1.2.3...
  • Page 7 < CONTENTS > Revision Information ....................i IM 12D08G02-01E 8th Edition: Nov. 29, 2024-00...
  • Page 8 < 1. General > General Features of SC8SG Conductivity Detector ● The SC8SG Conductivity Detector with cell constant of 0.01 cm / 0.1 cm / 10 cm enables the conductivity measurement ranging from 0.05 µS/cm to 1000 mS/cm in a variety of processes.
  • Page 9 < 1. General > 1.2 Specifications 1.2.1 Standard Specifications Cable with pin terminals (applicable to FLXA202, FLXA21, FLXA402) Cable with M3 ring terminals (applicable to FLXA402, SC450G) Cable with M4 ring terminals (applicable to FLXA202, FLXA21) Variopin connector (applicable to SA11) Object of measurement: Conductivity of liquids Measuring Principle:...
  • Page 10 < 1. General > • 10 cm cell constant, four-electrode sensor: polyvinylidene difluoride (PVDF), glass and platinum • Stem (flow-through type): SCS14 or polypropylene resin Weight: Screw-in type; approx. 0.9 kg (-R31) (excluding the cable) Flange type ; approx. 2.8 kg (-R31) (excluding the cable) Flow-through type (SCS14 holder);...
  • Page 11 If a welding socket (K9208BK) needs to be ordered beforehand, either place a separate order or prepare one by referring to the Dimensions later in this brochure. No holder is equipped with a mounting hardware. Please place an order on the SC8SG with option code /PS or /SS when you select flow-through model.
  • Page 12 Welding socket for screw-in model G9303EB O-ring For the sensor for oil-prohibited use (/DG1), please contact Yokogawa. (3) WU41: Dedicated cable for SC8SG This cable can be purchased additionally. SC8SG is supplied with cables of selected length. Model Suffix code Option code Description .....
  • Page 13 < 1. General > 1.2.3 Dimensions (1) Screw-in type Only the difference between SC8SG-R □□-□-100 and SC8SG-R□□-□-101 is whether or not having a welding socket. SC8SG-R □□-□-100 has a welding socket but SC8SG-R□□-□-101 does not. SC8SG-R31-T-100 (Low range) SC8SG-R61-F-100 (High range)
  • Page 14 < 1. General > SC8SG-R31-T-102 (Low range) SC8SG-R61-F-102 (High range) Unit: mm Unit: mm Electrode with 0.01cm Cell constant Electrode with 10cm Cell constant Two-electrode system Four-electrode system Pin terminals Pin terminals Locknuts Locknuts (M48x2) (M48x2) Approx. 78 Approx. 78...
  • Page 15 <Insertion length> Model and Code Flange rating øC øD øh SC8SG - R□□ - □ - 206 - □□ *A JIS 10K 50 RF SC8SG - R□□ - □ - 207 - □□ *A ANSI Class150 2 RF 120.7 152.4 19.1...
  • Page 16 < 1. General > (3) Flow-through type ● Option: Mounting hardware (-SS) SC8SG-Rpp-p-302, SC8SG-Rpp-p-303, Screw connection Unit : mm SCS14 Holder (Holder Material: SCS14) Approx.102 Unit: mm Variopin connector Pin terminals Approx. 78 Locknuts Fork terminals Outlet Rc1/2 or 1/2NPT(F) Ring terminals...
  • Page 17 1-10 < 1. General > SC8SG-Rpp-p-312, SC8SG-Rpp-p-313, Screw connection (Holder Material: PP) + Option (Mounting hardware: /PS) Unit: mm Variopin connector Pin terminals Approx. 78 Mounting Rc1/2 hardware Fork terminals 1/2NPT Outlet Ring terminals JIS 50A pipe Rc1/2 1/2NPT Inlet...
  • Page 18 1-11 < 1. General > WU41 : Dedicated cable for SC8SG ● Unit : mm Pin terminal 64.5 White Brown Green Yellow Black Cable length: 5.5 m, 10 m, 20 m Fork terminal Ring terminal Earth F22.ai IM 12D08G02-01E 8th Edition: Nov. 29, 2024-00...
  • Page 19 Blank Page...
  • Page 20 ● Detector (two-electrode system) ● Detector (two-electrode system) with cell constant of 0.01 cm , 0.1 cm with cell constant of 10 cm F0201.ai Figure 2.1 Components of the SC8SG Conductivity Detector and Their Functions IM 12D08G02-01E 8th Edition: Nov. 29, 2024-00...
  • Page 21 Blank Page...
  • Page 22 < 3. Installation, Piping and Wiring > Installation, Piping and Wiring Installation CAUTION When ultra-pure water flows through plastic pipe, electrostatic charge may be produced. When the sensor is installed on this plastic pipe, the electrostatic charge goes through the sensor, and into a converter circuit This electrostatic charge will discharge and damage electronic parts on the converter circuit.
  • Page 23 < 3. Installation, Piping and Wiring > Flow of measured solution F0301.ai A two-electrode detector with a cell constant of 0.01 cm or 0.1 cm should be installed in positions A above. A two-electrode detector with a cell constant of 10 cm should be installed in positions A or B above.
  • Page 24 < 3. Installation, Piping and Wiring > To facilitate machining the detector insertion port, the company has prepared sockets as shown in Figure 3.3. The detector mounting section of these sockets are machined as shown in Figure 3.2. ø55 Unit: mm (22) Detector Welded all around the...
  • Page 25 < 3. Installation, Piping and Wiring > Unit: mm Two 9 mm Dia. Holes Bracket Mounting Screw (four) Mounting Bracket (3.2 mm thick) M8 Screws (two), 14 mm long Washers (two) Location of Measured Solution Outlet The measured solution outlet can be positioned on the left (as shown in Figure 3.4), on the right, forwards or backwards.
  • Page 26 Note that under normal measuring conditions, the temperature detector in the SC8SG conductivity detector has sufficiently fast response the flow velocity of the measured solution will not be an issue.
  • Page 27 < 3. Installation, Piping and Wiring > [Temperature of the measured solution] The maximum temperature of the measured solution is restricted according to the heat resistance of the holder and piping materials used. NOTE The maximum temperature for a polypropylene (PP) holder is 80°C. For a stainless steel (SCS14) holder, the maximum temperature of the measured solution is 100°C for detector with a cell constant of 0.01 cm / 0.1 cm...
  • Page 28 < 3. Installation, Piping and Wiring > Bracket Mounting Screws (four) Bracket Holder Pipe Mounting Bracket F0306.ai Figure 3.6 Removing Bracket Where the detector is mounted horizontally, be sure that the measured solution outlet is oriented upwards. Piping to Measured Solution Outlet Be sure to orient upwards.
  • Page 29 < 3. Installation, Piping and Wiring > Wiring 5.5-m, 10-m or 20-m long detector cables are supplied with the conductivity detector according to the customer's specifications. Connect the detector cables to the converter terminals (see Figure 3.8). 3.3.1 Detector Cable Specifications Cable length: 5.5 meters (suffix code: -¨1) 10 meters (suffix code: -¨2) 20 meters (suffix code: -¨3)
  • Page 30 < 4. Operation > Operation Check that the conductivity measuring system is operating correctly and providing appropriate measurements. Then place the system in steady operation. For converter operating instruction, refer to the separate converter User's Manual. This chapter provides operating instructions for detectors. Preparation for Operation 4.1.1 Checking Piping and Wiring...
  • Page 31 For details of checks and maintenance to be performed during steady- state operation, refer to the separate converter User's Manual. Note: When the measured solution is free of contaminants, the SC8SG detector can operate without maintenance for extended periods of time (usually, one year or so).
  • Page 32 < 5. Inspection and Maintenance > Inspection and Maintenance The SC8SG Conductivity Detector can be used not only for measuring general solutions (at normal temperatures and where suspended solids etc. that may contaminate the detector are low levels) but also for measuring the conductivity of solutions under bad conditions, such as high-temperature solutions or those containing corrosive or suspended solids that may adhere to and contaminate the detector.
  • Page 33 < 5. Inspection and Maintenance > Cleaning the Detector 5.1.1 Guidelines for Cleaning Detector contamination tends to encourage electrode polarization and result in inaccurate measurements. If you find that detector contamination is affecting measurement accuracy, clean the detector. You should determine the optimum maintenance interval, so that maintenance is cost effective.
  • Page 34 < 5. Inspection and Maintenance > 5.1.3 Cleaning The electrodes are hidden inside the probe, so we can't access them to check them for contamination. We can assume that the electrode contamination will be similar to the condition of the outer circumference of the probe, and perform the cleaning procedure below to remove the dirt: Do not use a hard brush to clean the inside of the probe, or the electrodes may be damaged.
  • Page 35 Blank Page...
  • Page 36 – Material: SCS14 (for suffix code of -305) K9053KN – Material: PP (for suffix code of -315) K9115RS 1/2 NPT Adaptor for SC8SG - R□1- □ - 313 K9053JT Pipe mounting hardware for /PS option Y9514ZU Screw K9053LR Mounting hardware for /SS option CMPL 12D08G02-01E All Rights Reserved.
  • Page 38 Revision Information Title : Model SC8SG Conductivity Detector Manual No. : IM 12D08G02-01E Nov. 2024/8th Edition Added an option (/DG1) on Model and Suffix Codes. (p.1-4) Added a note below the table. (p 1-5) Sep. 2019/7th Edition Added Medium range (-R42), Variopin connector (-VS) (Chapter1, p.2-1, 3-2, 3-6, 3-8, 5-2)
  • Page 39 IM 12D08G02-01E...