Thermo Fisher Scientific ECFP21A1A1 Differential pH Sensor - Manual (Page 9)

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INSTALLATION
3.1 Wiring
There are two different methods for electrical connection between the sensor and the pH controller;
either direct or through a junction box.
3.1.1. Direct Connection
1. Use a watertight cord grip to insert the sensor cable into the Alpha pH2000D Controller.
Conduit holes are found on the bottom of the Alpha pH2000D controller for this purpose.
2. Connect the sensor wires to the Alpha pH2000D controller as outlined in the controller manual.
3.1.2. Using a Junction Box (Indirect Connection)
1. Use a watertight cord grip to insert the sensor cable and the interconnect cable into the junction
box that has a terminal strip designed to make the proper connections.
2. Connect both the sensor cable wires and the interconnect wires to the terminal strip.
3. Use a watertight cord grip to insert the sensor cable into the Alpha pH2000D
Controller. Conduit holes are found on the bottom of the Alpha pH2000D controller
for this purpose.
4. Connect the sensor wires to the Alpha pH2000D controller as outlined in the controller manual.
Be sure that the wire colors of the sensor cable match those of the interconnect cable on
either side of the terminal strip.
Route the interconnect cable through metal conduit to minimize electrical noise that
may interfere with the sensor signal.
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).
Figure 3.1: pH Sensor Hook Up