Thermo Scientific AquaSensors
™
AnalogPlus
™
Differential pH Sensor User Guide
16
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 controller through a watertight cord grip or conduit
fitting.
c.
Connect the sensor wires into the controller terminal block as shown in the
controller manual.
2.
Calibrate:
a.
Apply power to the controller and allow the sensor to warm up for approximately ½
hour before calibrating the measurement.
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 controller manual. It is recommended
to use a 2-point buffer calibration upon 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.
Either remove the cable from the analyzer or if there is enough slack, reverse twist
the cable (counter-clockwise) by 4 turns so that the cable is not over stress when
threading it into the tee.
c.
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.
