Instruction Manual YOKOGAWA Model SC24V Combined 12mm 4-in-1 differential pH sensor IM 12B6J7-02E-E 3rd edition
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Table of Contents 1 PREFACE 1.1 1.2 1.3 1.4 Introduction Unpacking and Checking Warranty and Service Serial Number definition 2 GENERAL SPECIFICATIONS 2.1 2.2 2.3 2.4 2.5 2.6 2.7 2.8 Measuring elements Wetted parts Functional specifications (at 25°C) Dynamic specifications Operating range Regulatory standards Shipping details Environmental conditions 3 INSTALLATION OF SC24V 3.1 3.2 3.
1 PREFACE 1.1 Introduction 1.2 Unpacking and Checking The SC24V sensor with Variopin connector is not a conventional pH sensor, but a differential sensor that uses two dissimilar ion sensitive glass membranes to generate the pH signal. The measuring element is the same as a conventional pH electrode, and the reference similar to a Sodium ion electrode.
number of a contact person that can be reached for further information. • Clean Statement Returned goods that have been in contact with process fluids must be decontaminated and disinfected prior to shipment. Goods should carry a certificate to this effect, for the health and safety of our employees. Material Safety Data sheets must be included for all components of the process to which the sensor(options) have been exposed. 1.
2 GENERAL SPECIFICATIONS 2.1 Measuring elements : pH glass electrode Sodium glass electrode Solid Platinum electrode Pt1000 temperature sensor 2.2 Wetted parts Measuring sensor Earth pin : Glass : Solid Platinum 2.
2.6 Regulatory standards CE : Decision 768/2008/EC - ATEX : Directive 94/9/EC, as amended by Regulation (EC) no. 1882/2003 - Certificate no. - Electrical data - Special - conditions (X) WARNING : DEKRA 11ATEX0014 X II 1 G Ex ia IIC T3...T6 Ga : For sensor input circuits (by connector) connected to a certified intrinsically safe circuit with the following maximum values : Ui = 18V; Ii = 170 mA; Pi = 0.
3 INSTALLATION OF SC24V For optimum measurement results, the SC24V should be installed in a location that offers calibration procedure is described in Section 6 of this Instruction Manual. an acceptable representation of the process composition and DOES NOT exceed the specifications of the sensor. The SC24V is designed with PG13.5 threaded connection to allow installation in a wide variety of applications. 3.3 Mounting the sensor The simplest mounting is to use the PG13.
Note: M ounting the sensor in fittings where the sealing is situated nearby the sensortip, uncorrect placement of the sensor will damage the measuring glass elements. Please handle with care. Note: F irst install the sensor in the adapter before it is mounted in the fitting. The SC24V sensor can also be mounted in other fittings using a quick-removal adapter. These adapters are available as a spare part and ordering information of these parts is given in Section 8 of this Instruction Manual.
Slide ring (Noryl) O-ring Slide ring (Noryl) O-ring Adapter PG13.5 to 3/4"NPT K1523JB (Noryl) K1523JD (SS) Seal, e.g. with Teflon tape. Adapter PG13.
4 DIMENSIONS 44 PG 13,5 Dimensions in mm M25 x 1.5 Figure 8: Dimensions adapters K1500DV, K1520JN, K1520JP 10 PG13.5 Ø13.
5 WIRING The SC24V is provided with a Variopin connector for connection to the Yokogawa pH analyzers using the WU10 dual coax cable. The connections of this Variopin connector (see Figure 11), the WU10 dual coax cable (see Figure 12) and the Yokogawa pH analyzer are given in Table 4.
6 GENERAL CALIBRATION & MAINTENANCE PROCEDURE Calibration of the SC24V sensor has to be done case 7.00). Go to solution 2 to do a 2-point with the pH analyzer connected. Normally the pH standards that are preprogrammed in the pH analyzer can be used for calibration with the pH analyzer set to “AUTOCAL”. The SC24V however is a differential pH sensor which needs pH buffers that have the same ionic strength because the sodium reference will change as the ionic strength changes.
6.3 Maintenance of the SC24V sensor A pH sensor requires routine maintenance to keep the measuring elements clean and 2. Deposits of oil and fat can be removed with hot water with a detergent. When the results are unsatisfactory, a mild (carbonate based) functioning. Because the SC24V sensor does not have an open reference junction and is hermetically sealed from the process, it does not suffer from poisoning, diffusion and fouling. This means the SC24V sensor requires very little maintenance.
8 SPARE PARTS K1500BV O-rings O-ring set (6 pcs.), 11x3 mm, EPDM K1500BZ K1500GR K1524AA O-ring set (6 pcs.), 11x3 mm, Viton O-ring set (8 pcs.), 11x3 mm, Silicon Set with O-ring (11x3, Silicon) and slide ring (Ryton) Connection equipment BA10 Junction box for longer cable runs WF11-xxx-F Extension cable with terminated ends. Specify length in whole meters (e.g.
ZPLPHBX B 18 9 EU DECLARATIONEU OFDECLARATION CONFORMITY OF CONFORMITY We: Yokogawa Europe B.V.
10 APPLICATION DATA SHEET SC24V DIFFERENTIAL PH SENSOR Customer _____________________________ Address _____________________________ Contact _____________________________ Telephone _____________________________ Fax _____________________________ Please complete a separate form for each process stream to be analyzed and return, marked for the attention of: Serial no.
YOKOGAWA ELECTRIC CORPORATION World Headquarters 9-32, Nakacho 2-chome, Musashino-shi Tokyo 180-8750 Japan www.yokogawa.com YOKOGAWA ELECTRIC ASIA Pte. LTD. 5 Bedok South Road Singapore 469270 Singapore www.yokogawa.com/sg YOKOGAWA CORPORATION OF AMERICA 2 Dart Road Newnan GA 30265 USA www.yokogawa.com/us YOKOGAWA CHINA CO. LTD. 3F Tower D Cartelo Crocodile Building No.568 West Tianshan Road Changing District Shanghai, China www.yokogawa.
