Thermo Fisher Scientific ECFP21A1A1 Differential pH Sensor - Manual (Page 11)

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Detailed Pipe Tee Installation Instructions
1. Wiring:
a. 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.
c. Connect the sensor wires into the Alpha pH2000D sensor terminal block as shown
in the Alpha pH2000D manual.
2. Calibrate:
a. Power the Alpha pH2000D controller.
b. 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.
c. 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.
d. If measurement response time is slow or if the sensor will not calibrate, refer to
Section 4 for maintenance, refurbishment and troubleshooting suggestions.
3. Mount:
a. Apply Teflon ® tape to the sensor body threads.
b. 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.
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