YOKOGAWA PH450G User Manual
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YOKOGAWA PH450G User Manual

YOKOGAWA PH450G User Manual

Chemical cleaning ph measuring system
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User's
Manual
Chemical Cleaning
pH Measuring System
IM 12B07W01-04EN
IM 12B07W01-04EN
1st Edition

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  • Page 1 User’s Manual Chemical Cleaning pH Measuring System IM 12B07W01-04EN IM 12B07W01-04EN 1st Edition...

  • Page 2: Introduction

    General Specifications Product Model Document Name Document number PH8SM3, PH8HS3, PH201G Chemical Cleaning pH measuring System GS 12B7A1-E PH450G PH450G pH and Redox (ORP ) Converter GS 12B07C05-01E FLXA202 FLXA202 2-Wire Analyzer GS 12A01A03-01EN FLXA21 FLXA21 2-Wire Analyzer GS 12A01A02-01E...
  • 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: Safety Precautions

    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. Trademark policy FLEXA, FLXA, SENCOM are the registered trade marks and trade names of Yokogawa’s...
  • Page 5 • 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 6: Table Of Contents

    Toc-1 Chemical Cleaning pH Measuring System IM 12B07W01-04EN 1st Edition CONTENTS Introduction ....................i Safety Precautions ..................iii General ...................... 1-1 Standard Specifications ................... 1-1 Model and Suffix Codes ................... 1-4 External Dimensions ..................1-6 Installation ....................2-1 Installing the PH8SM3 Chemical Cleaning Unit for a Chemical Cleaning Sys- tem ........................
  • Page 7 Toc-2 4.3.2 Supplying Chemical Solution to Holding Tank ........4-5 4.3.3 Supplying KCl Solution to Reserve Tank ........... 4-6 4.3.4 Adjustment of Pneumatic Pressure ........... 4-6 4.3.5 Setting Duration of Forced Feeding of Chemical Solution and Output of CYLINDER FAIL Signal ..............4-7 4.3.6 Supplying Power ................

  • Page 8: General

    Chemical Cleaning pH Measuring System are configured as the table shown below. Chemical Cleaning pH Measuring System pH/ORP Converter 2-wire Analyzer Chemical Cleaning unit PH8SM3-E PH8SM3-G or PH8SM3-F pH analyzer PH450G FLXA202 or FLXA21 Distributor ― PH201G pH sensor PH8EFP-□-TT2 (Note) Holder PH8HS3 Note You can select WTB10 Terminal Box, if necessary.
  • Page 9 <1. General> Chemicals for Cleaning: Acid solution (e.g., hydrochloric acid or diluted sulfuric acid), or alkali solution. Organic solvents are not allowed. Note: Select appropriate solution for effective cleaning. Material, Finish, and Color of Main Components: Control Box (K9729AN) Material: Aluminum alloy casting Colors: Deep sea moss green (Munsell 0.6GY3.1/2.0) and frosty white (Munsell 2.5Y8.4/1.2) Finish:...
  • Page 10 <1. General> Note 2: The wiring and piping between the chemical cleaning unit, sensor, KCl reserve tank, and holder are to be done by the user. Note 3: The wiring between the switch in the holder and the chemical cleaning unit is to be done by the user. The terminal size is M4.

  • Page 11: Model And Suffix Codes

    - - - - - - - - - - - - - - - - - - Operating Unit for Chemical Cleaning System - - - - - - - - pH/ORP converter (PH450G) measuring - - - - - - - -...
  • Page 12 <1. General> Spare Parts Description Remarks Fuse for power supply A1109EF Rating: 1A (for pH/ORP converter only) Polyethylene tubing L9901CA Specified length by meters Fluoropolymer (PTFE) L9901LG Specified length by meters tubing Polypropylene fitting L9831NA L-shape fitting (R1/8) L9831NE L-shape fitting (R1/4)f L9831JE I-shape fitting (R1/4) Fluoropolymer (PTFE)

  • Page 13: External Dimensions

    <1. General> External Dimensions PH8SM3 Chemical Cleaning Unit pH/ORP Converter (PH8SM3-E) KCl reserve tank *1 Hood unit：mm PH450G （Option） （can be installed） （ Separated Order ） Control Box 1630 (1540) 1600 *2 Pressure Regulator Stand Air Inlet *3 for KCI reserve tank （SEHC）...
  • Page 14 <1. General> PH8HS3 Holder (130) 485 max. Unit: mm 35 pitch Approx.150 Mounting bracket with U-bolts (126) Approx.110 (65) Grommet for external wiring 50A Pipe （provided by customer） Cylinder Cover Cylinder (Option) 2-Φ9 holes Movement Sensor cable and KCI tube (95) During (170)
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  • Page 16: Installation

    (3) Easy access for maintenance work The location must allow users to have an easy view of the display on the PH450G pH/ORP Converter or 2-wire Analyzer FLXA202/FLXA21, and to operate the control box with ease to set the pressure.

  • Page 17: Installation Facilities

    <2. Installation> Ambient temperature is always maintained in the range of 0 to 45˚C Check if there is any possibility that the cleaning chemical solution can freeze in winter or if the pH/ORP Converter (or 2-Wire Analyzer) or the control box are subject to abnormal temperature rises from direct sunlight.

  • Page 18: Installing The Ph8Hs3 Holder

    <2. Installation> Installing the PH8HS3 Holder 2.2.1 Where to install the holder The PH8HS3 holder must be installed in a location which is appropriate for pH measurement and control and satisfies the following requirements. (1) Safe and easy access for maintenance work. This requirement must be satisfied since the holder is raised and removed when attaching/ detaching the pH sensor.

  • Page 19: Installing The Ph8Hs3 Holder

    <2. Installation> 2.2.3 Installing the PH8HS3 Holder Follow the procedure below to mount the PH8HS3 holder onto the pipe. (1) Attach the mounting brackets (two pairs) to the holder by adjusting the position of the pH sensor to satisfy the required distance to the pipe. To attach brackets, use the bolts (two each), washers (four each) and nuts (two each) that with the holder.
  • Page 20 <2. Installation> Rubber cap Sensor holder Cable tie Pass the cable tie through the opening of the metal fitting Metal fitting and then fasten the sensor cable and, the KCI supply tube together. Sensor cable KCl supply tube F2.7.ai Figure 2.7 Fixing the Sensor Cable and KCI Supply Tube (4) Fix the PH8HS3 holder to the pipe CAUTION...
  • Page 21 <2. Installation> Install the holder so the tip of the pH sensor drops into the measured solution to a depth of 30 to 90 mm. Do not allow the bottom plate of the cleaning Tank chamber to become submerged in the measured solution.

  • Page 22: Piping And Wiring

    <3. Piping and Wiring> Piping and Wiring Piping The following lines must be provided to the chemical cleaning pH measuring system. Lines (2) through (4) are polyethylene resin tubing or joints supplied with the system. Always make sure that the length of each line is kept to a minimum (less than 10 m). (1) Line for connecting air source (2) Line for actuating cylinder to drive sensor pneumatically (upward) (3) Line for actuating cylinder to drive sensor pneumatically (downward)

  • Page 23: Line For Connecting Air Source

    <3. Piping and Wiring> 3.1.1 Line for Connecting Air Source Air with a pressure of 300 to 950 kPa (3 to 9.5 kg/cm ) is supplied to the operating unit of the chemical cleaning system. Use a steel or stainless steel line with an inner diameter greater than 6 mm to connect the air source to piping port “A”...

  • Page 24: Wiring

    This connection is essential for the two-wire pH transmitter system. Set up the connection between the control box and the PH201G distributor. Note: For the four-wire pH converter system, connect the control box with the PH450G pH / ORP converter (this connection is already made before shipment).
  • Page 25 (1) Connection for pH sensor cable Connect the sensor cable so that the code on each core wire matches the corresponding code on the PH450G pH/ORP Converter. For more information about sensor cable connection, see the user’s manual “PH450G pH/ORP Converter.” Also refer to “WTB10 Relay Terminal Box”...
  • Page 26 1.1. (5) Connection for pH signal PH450G pH/ORP Converter sends two 4 to 20 mA signal (pH, temperature) and receives the contact input for cleaning start. Use a two-core cable with a finished outer diameter of 9 to 12 mm for this connection. For the output signal from pH/ORP Converter, connect the terminals “mA1 +”...

  • Page 27: Wiring System With 2-Wire Analyzer

    <3. Piping and Wiring> (6) Connection for contact input of WASH (cleaning) signal It is already been wired. 3.2.2 Wiring system with 2-Wire Analyzer Figure 3.3 illustrates wiring the system with 2-Wire Analyzer. PH201G FLXA202 or FLXA21 Distributor A(+) (+)C Output signal (1-5V DC) Cleaning Signal...
  • Page 28 <3. Piping and Wiring> (3) Connection for power supply and ground <Connection for power supply> A power supply voltage of 100V AC ±10%, 50/60 Hz is box of the PH8HS3 operating unit of the chemical cleaning system. CAUTION The chemical cleaning pH measuring system has no power switch. To avoid the possible hazard of electrical shock or damage to the instrument, always install a power switch (double-pole) in the power line.
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  • Page 30: Operation

    <4. Operation> Operation This chapter gives an overview of the functions and operations of the components the system along with their names and explains the start-up procedure required implement optimum cleaning Names and Functions of Components PH8SM3 Chemical Cleaning Unit (Reserver tank for KCl solution) Awning hood (pH/ORP converter)
  • Page 31 <4. Operation> PH8SM3 Holder Terminal block Drip-proof cover protects against rain or dust. for limit switch Cable inlet Air connection part for Allows the cable (for the signal actuating pneumatic which detects the upper limit of cylinder (downward) the sensor holder's position) Limit switch to get through to the terminal block for the limit switch.

  • Page 32: How The Chemical Cleaning Ph Measuring System Works

    <4. Operation> How the Chemical Cleaning pH Measuring System Works 4.2.1 Operating Modes There are two operating modes in the chemical cleaning pH measuring system: the measurement mode and cleaning mode. Measurement mode The system performs pH measurement. The sensor holder is in its lowest position, submerging the pH electrodes in the chemical solution.

  • Page 33: Wash Sequence

    <4. Operation> 4.2.3 Wash Sequence Figure 4.4 shows the actions that the system implements to clean the electrodes when it receives a WASH (cleaning) command from either PH450G or FLXA202/FLXA21. (Measurement mode) (Measurement mode) (WASH mode) Holding of pH output signal...

  • Page 34: Startup

    <4. Operation> End of WASH sequence When the WASH time elapses, the WASH contact signal stops. The air circuit for solenoid valve SV2 switches to apply a pneumatic pressure to the port that lowers the cylinder. The sensor holder goes down and the bottom plate of the cleaning chamber opens, causing the chemical solution within the cleaning chamber to drain out.

  • Page 35: Supplying Kcl Solution To Reserve Tank

    <4. Operation> Bleed O-ring Level of chemical solution in holding tank Pressurized Tube (F) Force-feeding Tube (G) Level of solution in metering tank Check Valve (Volume: approx. 100 ml) Gasket Bottom (Seat) Bottom Chemical Solution Inlet Gasket Check Valve F4.5.ai (Seat) Figure 4.5 Metering Tank for constant quantity of chemical solution...

  • Page 36: Setting Duration Of Forced Feeding Of Chemical Solution And Output Of Cylinder Fail Signal

    Upon shipment, these data settings are provided as shown in Table 4.1. Confirm these settings before operation and change them as necessary. For operation required to verify or change these settings, see the instruction manuals of PH450G or FLXA202/FLXA21. IM 12B07W01-04EN...

  • Page 37: Verifying Wash Operation

    (5) The sensor holder descends smoothly without delay at the same time the switch is turned off. After completing verification of these operations, have the PH450G or the FLXA202/FLXA21 output the WASH contact signal to make sure that the WASH operation of the chemical cleaning pH measuring system is carried out properly.

  • Page 38: Inspections During Regular Operation

    For inspection and maintenance implemented during a system shutdown to maintain system performance, see Chapter 5. For details on the items of inspection for the FLXA202/FLXA21, PH450G pH/ORP converter or PH8EFP pH sensor, refer to those corresponding manuals.

  • Page 39: Procedure When Restarting System Operation

    4-10 <4. Operation> (1) Turn on the MANUAL WASH switch in the control box to execute the WASH operation. (2) Remove the sensor holder after the air bubbling in step 1 is completed. Submerge the pH sensor in water. Leave the sensor in the water until the system is restarted in order to prevent the glass film on the sensor electrodes from drying out.

  • Page 40: Inspection And Maintenance

    Refer to sub section 4.4.2 to check the itemised inspection and maintenance, such as refilling the tank with chemical solution, required to maintain normal system operation. For inspection and maintenance of PH450G pH/ORP Converter, FLXA202/FLXA21, and PH8EFP pH sensor, refer to the corresponding user’s manuals supplied with each of these instrument.

  • Page 41: Replacement Of Fuses In The Power Supply Box

    It is, therefore, recommended that you replace the fuse once every two years even if you do not observe any anomaly with it. Note: The PH450G pH/converter also contains a 0.1 A fuse. Refer to the maintenance parts list of PH450G.

  • Page 42: Cleaning And Lubricating Pneumatic Cylinder For Driving The Sensor Holder

    <5. Inspection and Maintenance> <Standard position of spring-adjustment nut> The standard position of the spring-adjustment nut is where it is when the spring contracts 9mm from the position of its upper end (free length) which is given when the gasket surface comes into slight contact with the bottom surface of the cleaning chamber.

  • Page 43: Inspecting O-Rings On Sensor Holder

    <5. Inspection and Maintenance> 5.2.4 Inspecting O-rings on Sensor Holder There are two O-rings attached where the pH sensor is installed in the sensor holder to prevent the measured solution from getting inside the sensor holder (see Figure 4.2). Remove the pH sensor from the holder and confirm that the chemical solution is not leaking into the holder.

  • Page 44: Troubleshooting

    This chapter deals with the corrective actions taken when the system fails to operate normally due to, for example, a failure in components. For malfunctions regarding the PH450G pH/ ORP Converter or FLXA202/FLXA21 2-Wire Analyzer and PH8EFP pH sensor, refer to the correspondng user’s manual supplied with these instruments.

  • Page 45: A Smaller Quantity Of Chemical Solution Is Fed To Holder

    <6. Troubleshooting> A Smaller Quantity of Chemical Solution Is Fed to Holder One of the reasons for this is that the thin covering in the bottom of the metering tank does not serve as a check valve. Normally, the covering shuts off the fluid inlet when the appropriate pneumatic pressure is applied to the metering tank, resulting in the liquid inside flowing only into the holder.

  • Page 46: Chemical Solution Cannot Be Fed Into Cleaning Chamber

    <6. Troubleshooting> (4) Put a new spring in place. Also replace the washer, spring-adjustment nut, locknut and guide plate removed in step (3) as well as the screw removed in step (2). (5) Taking precautions against problems in vertical movement of the rod, secure the guide plate to the chassis (with screws).
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  • Page 48: Customer Maintenance Parts List (Ph8Sm3)

    Connector (Material: polyethylene) K9729BV Pipe K9729BX Tube K9729BY Tube K9729GA Check Valve (Seat) K9729GB Gasket K9729GC Bottom CMPL 12B07W01-13E All Rights Reserved. Copyright © 1999 Yokogawa Electric Corporation. Subject to change without notice. 1st Edition: 1999 (YK) 4th Edition: Oct. 2016 (YK)
  • Page 50 PH8HS3 Maintenance Holder (Style C) Parts List Item Part No. Description K9729YK O-Ring K9729WJ Gasket CMPL 12B07W01-23E All Rights Reserved. Copyright © 1999 Yokogawa Electric Corporation. Subject to change without notice. 1st Edition: 1999 (YK) 3rd Edition: Oct. 2016 (YK)
  • Page 52 Manual Title : Chemical Cleaning pH Measuring System Manual No. : IM 12B07W01-04EN Nov. 2016/1st Edition Newly published. (IM 12B7W1-03E’s order is discontinued. Newly published for PH8SM3-E, -F, -G.) Yokogawa Electric Corporation 2-9-32 Nakacho, Musashino-shi, Tokyo 180-8750, JAPAN http://www.yokogawa.com/ IM 12B07W01-04EN1st Edition : Non. 11, 2016-00...
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