YOKOGAWA PH8EFP User Manual
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YOKOGAWA PH8EFP User Manual

YOKOGAWA PH8EFP User Manual

Kcl filling type ph sensor
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User's
Manual
Model PH8EFP
KCl Filling type pH Sensor
IM 12B7J1-01E
IM 12B7J1-01E
22nd Edition

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Summary of Contents for YOKOGAWA PH8EFP

  • Page 1 User’s Manual Model PH8EFP KCl Filling type pH Sensor IM 12B7J1-01E IM 12B7J1-01E 22nd Edition...

  • Page 2: Introduction

    IM 12A06S01-00EN-(P) IM 12A06S01-01EN-(P) Trademark Acknowledgments • FLEXA, FLXA are trademarks or registered trademarks of Yokogawa Electric Corporation. • All other company and product names mentioned in this user’s manual are trademarks or registered trademarks of their respective companies. • We do not use TM or ® mark to indicate those trademarks or registered trademarks in this user’s manual.

  • Page 3: For The Safe Use Of This Equipment

    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. IM 12B7J1-01E...
  • Page 4 Any option code is available. For PH202S, model and suffix code below is available. PH202S-○-E ○ must be C or U. There are no PH202S models that meet the Korean explosion proof standards. Any option code is available. Upper limit of process temperature on the PH8EFP Transmitter used in FLXA21 PH202S combination Ambient temperature Ta 40°C...
  • Page 5 < Introduction > Other warnings are provided in the following. WARNING Handling precautions: (1) Potential electrostatic charging hazard Electrostatic charge may cause an explosion hazard. Avoid any actions that cause the generation of electrostatic charge, e.g., rubbing with a dry cloth.

  • Page 6: After-Sales Warranty

    • If we replace the product with a new one, we won’t provide you with a repair report. • 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 7 Blank Page...

  • Page 8: Table Of Contents

    < CONTENTS > Model PH8EFP KCl Filling type pH Sensor IM 12B7J1-01E 22nd Edition CONTENTS INTRODUCTION .....................i  For the safe use of this equipment .............ii  After-sales Warranty ..................v  Specification ..................... 1-1 1.1 Standard Specifications ................... 1-1 1.2 Model and Suffix codes ..................1-3 External Dimensions ..................
  • Page 9 viii < CONTENTS > 3.2.2 Replacing Liquid Junction ..............3-4 Customer Maintenance Parts List ........CMPL 12B05J01-02E Revision Information ....................i IM 12B7J1-01E 22nd Edition : Apr. 04, 2024-00...

  • Page 10: Specification

    < 1. Specification > Specification The Model PH8EFP KCl filling type pH Sensor permits stable pH measurement even for solutions having comparatively severe properties. This sensor can be mounted on either an PH8HF flow-through holder or an PH8HS submersion holder, or its can be used alone suspended in the solution (maximum depth 3 meters) depending on the specification. 1.1 Standard Specifications Measurement object: Hydrogen ion concentration (pH) in aqueous solution Measurement principle: Glass electrode method...
  • Page 11 If you have any questions about the wetted part construction of the product, be sure to contact Yokogawa. When /CAL (with PH calibration setting data) is specified, keep the sensor in an environment protected from freezing and direct sunlight.

  • Page 12: Model And Suffix Codes

    < 1. Specification > 1.2 Model and Suffix codes pH Sensor Option Model Suffix Code Description Code PH8EFP ............KCl Filling Type pH Sensor Cable Length ....and KCl Tube ........Length ....10 m ....15 m ....20 m ....For Variopin connector 3m (*11) ....
  • Page 13 KCl powder (three bags, 250 mL solution each) /STD Sensor stand (with mounting bracket for 2-inch pipe) Including the following: Two 200 mL polyethylene cups One cleaning bottle Either /KCLL or /KCLP is required for PH8EFP-¨¨-¨¨-TT2. Consumables Part Part Name Remarks Number...

  • Page 14: External Dimensions

    KCl solution tube 　For FLXA402, FLXA202, FLXA21 (PH8EFP-��-��-TT�-N-E*A) Pin terminal (-E) For PH200, PH400 (PH8EFP-��-��-TT�-N-T*A) For PH100 (PH8EFP-��-��-TT�-N-B*A) Ø27.5 Ø27.5 Ø38 Ø38 Fork terminal (-T, -B) Figure 1.1 PH8EFP Filling type pH Sensor IM 12B7J1-01E 22nd Edition : Apr. 04, 2024-00...
  • Page 15 < 1. Specification > General Purpose KCl Reserve Tank Medium Pressure KCl Reserve Tank (PH8EFP - □□ - □□ - TT1 - □ -□ *A) (PH8EFP - □□ - □□ - TT2 - □ -□ *A) Pressure gauge Socket type connector Rc1/4 screw JIS 50A pipe ø60.5...

  • Page 16: Installation

    2.1.1 Unpacking and Inspection The Model PH8EFP pH sensor is well packed so as to prevent damage during shipment. After removing the sensor from its shipping container, visually check the sensor for damage. Check also the order was delivered correctly by identifying the information on the nameplate attached on the sensor body or sensor cables.

  • Page 17: Mounting Glass Electrode

    < 2. Installation > 2.1.2 Mounting Glass Electrode Mount the glass electrode on the sensor body as per the following procedure: (1) Peel off the seal from the electrode mounting hole on the sensor body. (2) Remove the cap for the glass membrane. Wipe off any solution remaining on the O-ring with a tissue or other material. (3) Remove the cap for the gold-plated pin. (4) Confirm that there is no damage on the O-ring that might affect its sealing performance. (5) Mount the glass electrode on the sensor body.

  • Page 18: Requirements For Mounting The Ph Sensor

    KCl solution filled inside and the glass electrode and the liquid junction attached. (3) If specified, a reserve tank containing 250 mL KCl solution and mounting hardware to hold this tank are supplied with the PH8EFP pH sensor. Attach the holding hardware to the pipe (nominal diameter 50 mm). Connect the reserve tank to the KCl solution supply tube of the sensor. Remove the cap from the tank and screw the tube connector securely into the tank.
  • Page 19 < 2. Installation > NOTE If the sensor tip does not project out from the pipe end, the measured value may not respond promptly to the pH variations of the measured solution. This may cause problems for pH measurement and control. On the other hand, if the sensor tip projects too far from the pipe end, the force on the sensor may damage the sensor cable from scraping it against the pipe.

  • Page 20: Installing Sensor In Ph8Hs Submersion Holder

    < 2. Installation > 2.2.2 Installing Sensor in PH8HS Submersion Holder (1) To install the sensor in the submersion holder, proceed as follows: • For a pipe-mounting submersion holder without a cleaner, loosen the sensor holder nut to remove the holder. Right-angled Pipe Clamp Arm Pipe Sensor Holder...
  • Page 21 < 2. Installation > Clamp (Screw) Cleaner Holder Sensor Holder F2.7.ai Figure 2.7 Removal of Sensor Holder (with Cleaner) (2) Pass the cable and KCl solution supply tube through the sensor holder as follows: First, as shown in Figure 2.8, remove the protector screwed into the tip of the sensor holder. After removing it, take away the sponge (material for transportation, not necessary after remove).
  • Page 22 (5) If specified, a reserve tank containing 250 mL KCl solution and mounting hardware to hold this tank are supplied with the PH8EFP pH sensor. Attach the mounting hardware to the pipe (2-inch). Connect the reserve tank to the KCl solution supply tube of the sensor. Remove the cap from the tank and screw the tube connector securely into the tank.

  • Page 23: Installing Sensor In Flow-Through Holder

    < 2. Installation > For the Big-volume reserve tank, refer to page 2-9 to 2-10. When /CAL (with PH calibration setting data) is specified, gently loosen the liquid junction to exhaust the air contained in the tank and tubing. (7) Screw the protector to fix the sensor to the holder. In this case, remove the protective cap and secure the protector so that the flange of the sensor compresses the O-ring firmly. about the installation method. pH Sensor O-ring Protector F2.9.ai Figure 2.9 Installing Sensor in Submersion Holder (8) For “-ST”...
  • Page 24 KCl solution filled inside and the glass electrode and the liquid junction attached. (3) If specified, a reserve tank containing 250 mL solution and mounting hardware to hold this tank, or a medium pressure reserve tank are supplied with the PH8EFP pH sensor. Attach the mounting hardware for general purpose reserve tank to a pipe (2-inch). Connect the general purpose reserve tank to the KCl solution supply tube of the sensor. Remove the cap from the tank and screw the tube connector securely into the tank.
  • Page 25 2-10 < 2. Installation > When a reserve tank for medium pressure is used. Fill the reserve tank with KCl solution (*1). Loosen the nut on the reserve tank upside and remove the cap — the pressure gauge is mounted — and pour about 250 mL or KCl solution into the tank.
  • Page 26 2-11 < 2. Installation > pH Sensor Fixing Nut O-ring Flow-through Holder 2-inch Mounting Pipe F2.12.ai Figure 2.12 Installing Sensor in Flow-through Holder How to install the HH350G, PB350G, and PB360G holders, refer to relevant IMs. IM 12B7J1-01E 22nd Edition : Apr. 04, 2024-00...

  • Page 27: Ph Sensor Cable Wiring Procedure

    2-12 < 2. Installation > pH Sensor Cable Wiring Procedure 2.3.1 Processing of Cable Inlet Hole Open the cable inlet hole in terminal box using the supplied punch tool. The location of the cable inlet hole is shown by the circle-shaped groove under the case. The end of the supplied punch tool is put in the center of this circle and it is tapped with appropriate force.

  • Page 28: Connecting Sensor Cable To Flxa202/Flxa21

    2-13 < 2. Installation > Put the nut in place, and screw it onto the main body sufficiently. At this time, loosen the cap so that the cable is not twisted. After fixing the main body, tighten the cap to keep moisture out of the equipment. However if the cap is screwed up too tight, the cable will be damaged. Attach the nut in the direction shown here (so that it engages the detent groove). Gasket Main unit F2.15.ai...

  • Page 29: Connecting Sensor Cable To Flxa402

    2-14 < 2. Installation > (3) Install the cable gland in the wiring hole as follows: Pass the tip of the cable gland into the opening and completely tighten the gland with the nut inside the case. After tightening the gland, secure the cap properly to prevent moisture from getting into the case.

  • Page 30: Maintenance On Operation

    < 3. Maintenance on operation > Maintenance on operation Operation and Periodic Maintenance 3.1.1 Calibrating pH Sensor Using Buffer Solutions Calibrate pH sensors with buffer solutions before starting normal operation because the emf of glass electrodes differs somewhat from each other. The emf of a glass electrode gradually changes due to electrode staining or deterioration. Therefore, buffer solution calibration must be carried out periodically within a given period of time to keep the measurement errors within the limits specified. For more detailed information on the calibration procedures, see the user’s manuals for each pH converter to be combined.
  • Page 31 < 3. Maintenance on operation > (1) Close the valves to shut off the low of measured solution (see Figure 3.1) - first in the inlet then the outlet valves in the flow-through type holder. Outlet side Stop Valve Inlet side Stop Valve F3.1.ai Figure 3.1 Process Piping of Flow-through Type Holder. Remove the socket connector on the reserve tank and stop the air pressurizing the tank (see Figure 3.2).

  • Page 32: Cleaning Glass Electrode And Liquid Junction

    < 3. Maintenance on operation > 3.1.4 Cleaning Glass Electrode and Liquid Junction Staining of a glass electrode or liquid junction can cause measurement errors. Therefore, if he measured solutions tend to stain the electrode, the glass electrode and liquid junction must be cleaned periodically - depending on the degree of staining.
  • Page 33 < 3. Maintenance on operation > 3.2.2 Replacing Liquid Junction Even after washing the liquid junction, if normal measurement cannot be made, replace the liquid junction. When replacing the liquid junction, fill the sensor with KCl solution to just before the solution overflows through the liquid junction mounting hole. Use a 3.3 mol/L KCl solution (a higher concentration of KCl or KCl powder) for this application. After the replacement of the liquid junction, confirm that the KCl solution percolates through the liquid junction. However, the visual verification of whether the KCl solution is percolating, is sometimes not possible due to indivisual difference. In this case, check Impedance2 to judge that the liquid junction is functioning properly. Normally the Impedance2 is 50 kΩ or less in pH7 standard solution or pH4 standard solution.
  • Page 34 Maintenance KCl Filling type pH Sensor Parts List Variopin connector Name Plate Fork type Pin type Ring type CMPL 12B05J01-02E All Rights Reserved, Copyright © 1987, Yokogawa Electric Corporation. Subject to change without notice. 14th Edition : Aug. 2023 (YK)
  • Page 35 PH8EFP/PF K9319NC for PH8EFP/HA and /PF K9142TP for Approved Under the Japanese Measurement Law (/K) K9319NB for PH8EFP/PF Approved Law K9142TU for High Alkali of PH8EFP/HA – Junction Assembly K9142TH for general use K9319QA for PH8EFP/PF K9142HW for PH8EFP/TF...
  • Page 36 Medium Pressure KCl Reserve Tank Assembly for Suffix Code: -TT2 ( K9142VG ) To KCI Filling Tube Item Part No. Description K9142VL Tank Assembly K9142VJ Block K9142VK Block G9303AE O-Ring L9835DD Joint L9867BS Pressure Gauge K9142RU Label K9142VP Bracket K9142EJ K9142VQ Ring L9826AL...
  • Page 38 Revision Information Title : Model PH8EFP KCl Filling type pH Sensor Manual No. : IM 12B7J1-01E Mar. 2024/22nd Edition Added an option code /CAL. (P. 1-3) Corrected an error on the dimension (P.1-5) Aug. 2023/21st Edition CMPL revision etc. Aug. 2022/20th Edition Corrected the descriptions. (P.3-3) Mar. 2022/19th Edition...
  • Page 39 M3 ring terminals added for PH450G, CMPL12B05J01-02E revised to 7th edition. Jul. 2006/3rd Edition All over revised. Feb. 1996/2nd Edition Some error corrected. Dec. 1995/1st Edition Newly published. Yokogawa Electric Corporation 2-9-32 Nakacho, Musashino-shi, Tokyo 180-8750, JAPAN http://www.yokogawa.com/ IM 12B7J1-01E 22nd Edition : Apr. 04, 2024-00...

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