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- Page 1 User’s Manual Model PH8ECP KCl Filling Type pH Sensor (for electrolysis plant) IM 12B7J3-01E IM 12B7J3-01E 7th Edition...
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Page 2: Introduction
1.2. (2) I nformation Covered by This Manual This manual covers all of the information on handling the PH8ECP, such as instructions on installa- tion, inspection, and maintenance and service. Personnel who handle this product should read this manual thoroughly. -
Page 3: For The Safe Use Of This Equipment
Warning and Disclaimer 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. - Page 4 The FLXA21 is internally isolated. Upper limit of the process temperature. The upper limit of process temperature is indicated below when the sensor is used in combina- tion with a YOKOGAWA transmitter. For FLXA21, model and suffix code below is available. FLXA21-D-□-D-EA-P1-○-A-N-LA-N-NN □...
- Page 5 <INTRODUCTION> n Symbol Marks Throughout this user’s manual, you will find several different types of symbols are used to identify different sections of text. This section describes these icons. WARNING Indicates a potentially hazardous situation which, if not avoided, could result in death or serious injury. CAUTION Indicates a potentially hazardous situation which, if not avoided, may result in minor or moderate inju- ry.
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Page 6: After-Sales Warranty
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 7 Blank Page...
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Page 8: Table Of Contents
<CONTENTS> Model PH8ECP KCl Filling Type pH Sensor (for electrolysis plant) IM 12B7J3-01E 7th Edition CONTENTS INTRODUCTION .....................i For the safe use of this equipment .............ii After-sales Warranty ..................v SPECIFICATIONS ..................1-1 1.1 Standard Specifications ................... 1-1 1.2 Model and Suffix codes ..................1-2 1.3 External Dimensions ..................1-3 INSTALLATION ..................2-1 2.1... - Page 9 Blank Page...
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Page 10: Specifications
< 1. SPECIFICATIONS > 1. SPECIFICATIONS The PH8ECP pH sensor, consisting of a complex glass electrode assembly, has high resistance to corrosion in solutions involving highly concentrated chlorine (Cl ) and sodium chloride (NaCl). It can be used to measure the pH of solutions in an electrolytic plant. This KCl filling type pH sensor is incorporated in a flow-through type holder. -
Page 11: Model And Suffix Codes
< 1. SPECIFICATIONS > 1.2 Model and Suffix codes Model Suffix Code Option Code Description PH8ECP ............KCl Filling type pH Sensor (*1) Cable and KCl ...... Tube Length ...... Solution Ground Tip ...... Platinum KCl Reserve Tank (*2) -TT1 ...... For general purpose with KCl reserve tank -TT2 ...... -
Page 12: External Dimensions
< 1. SPECIFICATIONS > 1.3 External Dimensions PH8ECP Unit: mm Fork Terminal Pin Terminal Ring Terminal (for PH202, (for FLXA402, PH450G, PH202/TB, (for PH400/PH200) FLXA202/FLXA21) FLXA202/FLXA21) Cable gland is not included. Reuse existing gland, or replace. Ø26.6 Ø38 F1.1.ai IM 12B7J3-01E... - Page 13 < 1. SPECIFICATIONS > General purpose KCl Reserve Tank Unit: mm 2-inch pipe Ø63 Approx.75 F1.2E.ai Approx.45 Medium Pressure KCl Reserve Tank Unit: mm Rc 1/4 Joint with valve Ø60.5 2-inch pipe F1.3E.ai IM 12B7J3-01E 7th Edition : Nov.20,2018-00...
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Page 14: Installation
Figure 2.1 Names of PH8ECP pH Sensor Components 2.1.2 Installing Flow-Through Type Holder Insure that the PH8ECP pH Sensor is installed in the flow-through type holder. 2.1.3 Installing Associated Instruments Check that any or the pH converter, two-wire pH transmitter, and terminal box which is used to connect cables from the pH sensor is already installed. -
Page 15: Ph Sensor Installation Procedures
A general purpose reserve tank filled with KCl solution 250 mL and hardware or a medium pressure reserve tank (where specified), are attached to the PH8ECP pH Sensor. Mount the general purpose reserve tank holder on a 2-inch pipe. Connect the KCl refilling tube to the general purpose reserve tank. - Page 16 < 2. INSTALLATION > Supply the sensor with KCl solution. When a general purpose reserve tank is used, mount the reserve tank in its holder with the tube connections directed downward. Make some ventilation holes in the top side of the reserve tank using the pins provided. Loosen the air exhaust plug in the reference electrode and allow KCl solution to flow into the sensor until the sensor is filled with KCl solution.
- Page 17 Plug the air exhaust port if the KCl solution overflows. Install the reserve tank cover and tighten the nut. 3.3 mol/L is used as KCl solution. The KCl solution can be prepared from KCl powder, Yokogawa's PH8AX accessory. Dissolve one bag of KCl powder (62 g) in deionized water and dilute to 250 mL.
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Page 18: Connecting Sensor Cables
< 2. INSTALLATION > 2.3 Connecting Sensor cables 2.3.1 Connecting Sensor Cable to Two-wire pH transmitter The following describes how to connect a pH sensor cable directly to the two-wire pH transmitter. When the cable is to be connected to a junction terminal box, first read the separately prepared "PH8TBG Junction Terminal Box (IM12B07W0l-01E)"... -
Page 19: Connecting Sensor Cable To Four-Wire Ph Converter
< 2. INSTALLATION > 2.3.2 Connecting Sensor Cable to Four-wire pH Converter To connect the sensor cable to a Four-wire pH converter, proceed as follows: Loosen the four screws that tighten the converter cover. Then remove the converter cover. Connect the sensor cables to the relevant terminals of the transmitter: First, remove the nut from the cable gland. -
Page 20: Use Of Ph Sensor
< 3. USE OF pH SENSOR > 3. USE OF pH SENSOR 3.1 Operation and Periodical Maintenance 3.1.1 Buffer Solution Calibration Calibrate with buffer solution before starting normal operation because the e.m.f. of the glass electrodes differ a little from each other. The e.m.f. of the glass electrode gradually changes due to electrode staining and electrode deterioration. -
Page 21: Replenishment Of Kcl Solution
< 3. USE OF pH SENSOR > 3.1.3 Replenishment of KCl Solution When the KCl solution in the tank seems to be nearly exhausted while using a pH sensor with general type reserve tank, replace the reserve tank with new one (provided separately as spare part). Instead of replacing the reserve tank, it can be replenished with a prepared KCl solution. -
Page 22: Cleaning The Glass Electrode And Liquid Junction
< 3. USE OF pH SENSOR > Refill the tank with 3.3 mol/L KCl solution (see Figure 3.3). The maximum solution level is 30 to 40 mm lower than the top. 30 to 40 mm F3.3E.ai Figure 3.3 Maximum KCl Replenishment Level Retighten the nut to fix the cap in position. Connect the socket type connector and apply air pressure to the tank. - Page 23 Blank Page...
- Page 24 Bottle for general use (250ml) K9084 KV Connector Assembly ( for general use) K9084 CG K9142VE Holder Assembly CMPL 12B7J3-01E All Rights Reserved, Copyright © 1987, Yokogawa Electric Corporation. Subject to change without notice. 3rd Edition : April. 2008 (YK)
- Page 25 Medium Pressure Type KCl 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 Bracket...
- Page 26 • CMPL is updated. , etc. 1987/1st Edition Newly published. n If you want to have more information about Yokogawa products, you can visit Yokogawa’s home page at the following web site. Home page: http://www.yokogawa.com/an IM 12B7J3-01E 7th Edition : Nov.20,2018-00...
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