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Summary of Contents for EUTECH INSTRUMENTS ECFP21A1A1 DIFFERENTIAL PH SENSOR - REV
- Page 1 Instruction Manual ECFP21A1A1 Differential pH Sensor 1 ½ Inch NPT Mounting Threads Copyright © 2006 All rights reserved. Eutech Instruments Pte Ltd 68X216866 Rev 0 10/04 Blk 55, Ayer Rajah +65 6778 6876 www.thermofisher.com Crescent, #04-16/24 +65 67730836 fax Singapore 139949...
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Page 2: Table Of Contents
TABLE OF CONTENTS TABLE OF CONTENTS..........................2 PREFACE............................... 3 SAFETY INFORMATION..........................4 INTRODUCTION............................5 1.1. General Information...............................5 1.2. Intended use................................5 1.3. Safety Instructions ..............................6 1.4. Removal from Service / Correct Disposal of the Sensor................6 PRODUCT DESCRIPTION..........................7 Sensor Description ..............................7 Specifications ................................8 INSTALLATION ............................ -
Page 3: Preface
This instruction manual serves to explain the use of the ECFP21A1A1 1½ inch pH sensor and is written to cover as many applications as possible. Please do not hesitate to contact Eutech Instruments or an authorized representative with questions or concerns. -
Page 4: Safety Information
SAFETY INFORMATION The ECFP21A1A1 1½ inch pH sensor shall be installed and operated only in the manner specified. Only a skilled, trained or authorized person should carry out installation, setup and operation of the sensor system. Before using the sensor, make sure that the sensor cable is connected as specified. Failure to do so may result in permanent damage to the sensor or controller. -
Page 5: Introduction
Improper use could lead to hazards for the user or a third-party, and/or adverse effects to the plant or other equipment. Eutech Instruments does not accept any liability for damage that may arise if information in this manual is not followed. Therefore, the operating instructions and specifications must be read and understood by all persons involved in installation and operation of this equipment. -
Page 6: Safety Instructions
The ECFP21A1A1 1½ inch pH sensor should be installed and operated only by personnel familiar with the sensor and qualified for such work. A defective sensor should be returned to Eutech Instruments for repair or replacement. Contact Eutech Instruments to obtain a Return Goods Authorization (RGA) number. -
Page 7: Product Description
PRODUCT DESCRIPTION 2.1 Sensor Description The ECFP21A1A1 1½ inch pH sensor uses a differential measurement technique to maximize lifetime in continuous industrial applications. The ground rod and encapsulated preamplifier construction reduce the effects of ground loops and allow the pH signals to be transmitted up to 3,000 feet. A replaceable heavy-duty quad junction salt bridge makes it simple to refurbish the sensor when necessary. -
Page 8: Specifications
The sensor will arrive with a protective cap that keeps the sensor hydrated. For short-term storage, put several drops of Eutech Instruments’ storage solution on the absorbent material in the protective cap and replace the cap on the sensor. This keeps the process electrode and salt bridge moist. -
Page 9: Installation
3.2 Mounting Hardware Eutech Instruments’ short nose sensor (Fig 3.2) has insertion threads located closer to the sensing elements and is recommended for short branch tees (typically metal tees and SCH 40 plastic tees). - Page 10 (7 N⋅m) 3.2.1. Pipe Tee Mounting Eutech Instruments’ distinct body type for its 1½ inch differential pH sensor ensure optimal positioning of the active pH sensor electrode in the process flow. Normally available pipe tees vary widely in construction dimensions. CPVC pipe tees are most generally available with schedule 80 walls. Stainless steel tees have thinner walls that change the final position of the sensor.
- Page 11 Detailed Pipe Tee Installation Instructions Wiring: Route the cable – either through conduit or on a cable tray. b. Insert the sensor cable into the Alpha pH2000D controller through a watertight cord grip. Conduit holes are provided for the cord grip on the bottom of the Alpha pH2000D controller.
- Page 12 Detailed Insertion Mount Installation Instructions Wiring: Route the sensor cable through the 1.5 inch extension pipe. d. Apply Teflon® tape to the sensor threads. Attach the sensor to the 1.5 inch NPT coupling by turning the sensor in a clockwise direction until secure.
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Page 13: Ph Sensor Maintenance
pH SENSOR MAINTENANCE 4.1 Cleaning the pH Sensor Head 4.1.1 In order to maintain an accurate measurement value, the sensor will need occasional maintenance. The maintenance interval will be dictated by the process in which it is installed. The harsher the process, the more often the sensor will require maintenance. Regular maintenance will yield a longer sensor life. -
Page 14: Ph Sensor Troubleshooting
4.2.4 Slowly fill the reservoir with 7pH Standard Cell Filling Solution so the solution just covers the reference O-ring. Do not over fill. Overfilling will lead to excessive pressures that will affect the junction potentials of the reference. 4.2.5 Slowly screw the new salt bridge clockwise onto the sensor head until secure. Tighten the salt bridge with a 15/16 wrench (24mm) until snug. -
Page 15: Ph Sensor Spare Parts & Accessories
Temperature Span Disconnect the BLACK and YELLOW sensor wires from the analyzer. Use an ohmmeter to measure the resistance between the BLACK and YELLOW wires. The meter should measure a resistance corresponding to the sensor temperature as outlined in the following table. Sensor Temperature Thermistor Resistance 630 Ω... -
Page 16: Ph Buffer Standards
Eutech Instruments/ Oakton Instruments will not be held responsible for damage resulting from careless or insufficient packing. A restocking charge will be made on all unauthorised returns. NOTE: Eutech Instruments Pte Ltd reserves the right to make improvements in design, construction, and appearance of products without notice.
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