User manual EUTECH INSTRUMENTS ECFP21A1A1 DIFFERENTIAL PH SENSOR REV 0

[. . . ] 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 Crescent, #04-16/24 Singapore 139949 +65 6778 6876 +65 67730836 fax www. thermofisher. com TABLE OF CONTENTS TABLE OF CONTENTS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 PREFACE. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 SAFETY INFORMATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [. . . ] Calibrate the pH sensor as explained in the Alpha pH2000D manual. It is recommended to use a 2-point buffer calibration on installation of the sensor. Subsequent calibrations should be scheduled based on process demands. If measurement response time is slow or if the sensor will not calibrate, refer to Section 4 for maintenance, refurbishment and troubleshooting suggestions. Apply Teflon® tape to the sensor body threads. Insert the sensor into the tee and slowly turn clockwise until secure. Tighten the sensor with a wrench until snug to prevent leaking. Be sure the pipe remains full when the sensors are installed. 2. 3. 3. 2. 2. Immersion Mounting For immersion mounting applications the sensor is connected to a 1½ inch extension pipe to protect the cable from damage and to reduce the possibility of leaks that may damage the sensor. Figure 3. 5: Immersion mounting assembly www. thermofisher. com Detailed Insertion Mount Installation Instructions 1. Route the sensor cable through the 1. 5 inch extension pipe. 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. Either route the cable directly to the Alpha pH2000D or splice the wires in a junction box and use an extension cable. Insert the 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. Connect the sensor wires into the Alpha pH2000D sensor terminal block as shown in the Alpha pH2000D manual. Remove the protective cap from the sensor head and make sure moisture is present and that the salt bridge has not dried out. If the protective cap is dry, the sensor should be hydrated in tap water for at least 1 hour prior to calibration. Calibrate the pH sensor as explained in the Alpha pH2000D manual. It is recommended to use a 2-point buffer calibration on installation of the sensor. Subsequent calibrations should be scheduled based on process demands. If measurement response time is slow or if the sensor will not calibrate, refer to Section 4 for maintenance, refurbishment and troubleshooting suggestions. [. . . ] If the reading is higher or lower than specified, replace the salt bridge and filling solution and try again. If on the second attempt the offset does not meet specification, replace the sensor. 2. pH Span Test If the RED and GREEN wires have already been disconnected to run the offset test, skip step 1. Disconnect the RED and GREEN sensor wires from the analyzer terminal block while leaving the other wires connected. Connect the (+) lead of a millivolt meter to the RED wire and the (-) lead of the millivolt meter to the GREEN wire. 2. Rinse the sensor in clean water. [. . . ]