Instruction Manual Model PH18 Differential pH sensor IM 12B6J4-E-A Yokogawa Corporation of America 2 Dart Road, Newnan, Georgia U.S.A.
Table of ContENTS PREFACE....................................................................................................................................................... 1 1 INTRODUCTION........................................................................................................................................... 3 2 GENERAL SPECIFICATIONS....................................................................................................................... 5 2.
IM 12B6J4-E-A
Caution - Inappropriate handling can cause damage. Striking or scratching the sensor against hard surfaces such as steel, stone, glass or ceramic, may cause damage to the enamel. Such damage may not affect the sensor performance immediately, but after prolonged exposure to the process, flaking of the enamel may occur. Note - Enable impedance checks in the PH202/FLXA21 or PH402/PH450 The sensor impedance checking can give early warning of damage to the enamel layers.
PREFACE The PH18 should only be used with equipment that meets the relevant IEC, American or Canadian standards. Yokogawa accepts no responsibility for the misuse of this unit. The PH18 is packed carefully with shock absorbing materials, nevertheless, it may be damaged or broken if subjected to strong shock, such as if the package is dropped. Handle with care. Although the PH18 has a weatherproof construction, the connections can be harmed if it becomes submerged in water or becomes excessively wet.
1. INTRODUCTION The PH18 is not a conventional electrode. It relies on two dissimilar ion sensitive enamel membranes to generate the signal. The measuring element is like a pH electrode, and the reference like a Sodium ion electrode. Therefore the PH18 can only be used in combination with pH meters that feature: 1 Dual high impedance inputs 2 Adjustable setting for Isothermal Point 3 Adjustable temperature coefficient The Yokogawa models PH202 and PH402 satisfy these requirements.
4 Measuring Enamel mV vs. pH in solution containing 0.1N Na+ Operating range pH of sample Fig. 1 Reference Enamel mV vs pH in solution containing 0.1N Na+ Operating range pH of sample Fig. 2 PH18 system output pH reading vs. pH in solution containing 0.1N Na+ Operating range pH of sample Fig. 3 Reference Enamel mV vs Na + content Fig.
2. GENERAL SPECIFICATIONS 2-1. Model PH18 differential pH sensor Temperature sensor : Pt1000 W RTD Wetted parts - pH sensor : pH sensitive enamel - Reference sensor : Na+ sensitive enamel - Liquid earth : via SS adapter - O-rings : EPDM - Adapters : SS 316 Max.
2-2. Model WU18 cable for model PH18 differential pH sensor Max. temperature :110 ºC (230 ºF) Material :Thermoplastic Rubber (T.P.R.) Colour :Blue. Shipping details sensor and adapter - Package :wxhxd 350 x 220 x 110 mm - Weight :approx. 1.4 kg Shipping details cable - Package - Weight :wxhxd 350 x 220 x 110 mm :2 m. approx. 0.6 kg :5 m. approx. 0.9 kg :10 m. approx. 1.4 kg MODEL AND SUFFIX CODE Model WU18 Suffix Option code code Description ............ ....
7 2-3. Dimensions of the PH18-SA 4 in mm (inches) 4 DIMENSIONS PH18-SA in mm (inches) PH18SA 237230 K1520EJ 237574 K1520EK 237202 M1289BA Fig. 5 PH18-SA and the adapters Fig. 6 External dimensions of the Fig. 8.PH18-SA External dimensions of the PH18-SA Fig. 7. PH18-SA and the adapters 55 (2.17) 26 (1.02) 51 (2.09) 44 (1.73) 22.5 (0.89) 1” 242574 K1520EJ /SWR Fig. 9. Options of the PH18-SA 237202 K1520EK /SWA M1289BA M1289BA /SBS /SNS Fig.All Rights 7.
3. THE TYPE 18 PH PROBE 3-1. Typical applications • Fermentation • Continuous reactions • Production of diary products • Product monitoring 3-2. Handling information for the glass lined pH probe. The differential pH probes are pressure and thermal shock resistant due to the fused steel/enamel construction. The probes have a very high mechanical stability and are extremely strong. Inappropriate handling, e.g.
9 12 3-5. PH18 Installation examples 3-5. PH18 Installation examples Socket for connection cable Primary adapter pH enamel Reference enamel Fig. 11TheThe primary adapter Fig. 11 primary adapter is usedis toused make to a connection to the process usedprocess by the transmitter make a connection to the used byas the liquid earth (solution This is (solution needed for the transmitter as theground). liquid earth optimum stability of the measurement and is used in ground).
4. EXA PH202/FLXA21 or PH402/ PH450 INSTRUMENT Service Code 04: 11 11 Change settings from 0.0.1 to 1.0.1 by using the ^ and > keys. Low limit 1 Megohm. High limit 1 Gigaohm. ENGLISH ENGLISH 4. EXA PH202 4. EXAOR PH202 PH402 ORINSTRUMENT PH402 INSTRUMENT Service Code 05: 4-1. Set-up PH202/PH402 Change settings from 1.1 to 0.1 by using the ^ and The EXA PH202/FLXA21 and PH402/PH450 are all 4-1. Set-up 4-1. Set-up Service Code 03:Code 03: the As. Pot. check which is not >Service keys.
12 5. CALIBRATION to perform a regular SLOPE check to verify proper functioning of the sensor. 5-1. Calibration set-up 5. All CALIBRATION pH sensors are characterized by 5-4. ASYMMETRY Potential Isopotential (ITP), Asymmetry Potential The default setting for Asymmetry potential 5-4. ASYMMETRY Potential 5-1. Calibration set-up (ASY) and SLOPE (SL). Typically the ITP is is 0 mV at Isopotential pH value.
6. CLEANING/STERILIZATION 7. MAINTENANCE The probe can be cleaned/sterilized inside the reactor. For CIP cleaning it must be ensured that the admissible alkali and acid concentration as well as the maximum temperature or cleaning time are not exceeded. Otherwise, the enamel of the electrode would be subject to increased corrosion. The PH18 does not normally require maintenance, as long as it is kept clean.
ENGLISH 16 14 POSITION OF THE O-RINGS 8.8.POSITION OF THE O-RINGS PH18-SA PH18-SA PH18-SE C C E B A D A Sizeofofthe the O-ring Size O-ring A=17.0 17.12 X 2.62 A= x 2.5 B=20.0 20.30 X 2.62 B= x 2.5 C= 25.0 x 1.5 C= 25.12 X 1.78 D= x 3.0 D=17.0 17.04 X 3.53 E= 17.12 X 2.62 EPDM MaterialsKALREZ K1500BR K1500BQ EPDM-FDA Approved K1500BJ K1500BK EPDM-FDA Approved Viton A K1500BS EPDM K1500FK K1522FL K1500BR Fig. 16 Location of the O-rings 9. 9.
SC24V or PH18 Application Data Sheet Customer: Please complete a seperate form for each process Tag No: stream to be analyzed and return to the attention of: Address: Yokogawa Corporation of America Analytical Business Unit Contact: 2 Dart Road Telephone: Newnan, Email: Georgia 30265 - 1040 FAX - (770) 304-1613 Authorization No. Rep Name: 1.
Yokogawa Corporation of America North America 2 Dart Road, Newnan, GA 30265-1094, USA Phone: 800-258-2552 Fax: 770-254-0928 12530 West Airport Blvd., Sugar Land, TX 77478 Phone: 281-340-3800 Fax: 281-340-3838 Yokogawa has an extensive sales and distribution network. Please refer to the website (www.yokogawa.com/us) to contact your nearest representative. Mexico Melchor Ocampo 193, Torre C, Oficina 3”B” Veronica Anzures D.F., C.P. 11300 Phone: (55) 5260-0019, (55) 5260-0042 Yokogawa Canada, Inc.
