ATI Q46H/85 PAA System Part 5 – Sensor Assembly
28
O&M Manual
Rev F (8/17)
The sensor is now ready for operation. The membrane should be stretched tightly across the tip
of the sensor.
CAUTION: When handling the assembled sensor, do not set the sensor on its tip or damage
to the membrane will result. Severe impacts on the tip of the sensor from dropping
or other misuse may cause permanent damage to the sensor.
5.2 Optional pH Sensor
An optional pH battery powered sensor is available for use with the Q46 system that outputs a
nominal signal of 0.3-1.5 VDC proportional to pH over a range of 0-14 pH units. The Q22P is
also available and outputs a standard 4-20 mA analog signal. Both sensors are shipped with a
protective rubber boot containing a small amount of salt solution to keep the glass elements in
good condition and ready for use.
No special preparations are required for use of this electrode. The protective boot should remain
in place until the system is to be placed into continuous service. Do not remove the protective
boot and allow the sensor to sit in the air for an extended period of time. The pH
electrodes MUST stay wet.
When ready for operation, simply remove the rubber boot from the end of the sensor and place
the sensor into the inlet chamber of the PAA overflow cell. It is placed directly above the sample
inlet tube. You will need to slide the flowcell chamber cover out of the way to put the pH sensor
in place.
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