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Quick Start Guide
Retract sensor with ball valve assembly PN 23240-00
WARNING
System pressure may cause the sensor to blow out with great force.
Take care when removing the sensor.
Make sure that the system pressure at the sensor is below the
maximum allowed retraction pressure for the length of sensor
you are using. For 21-in. (533.4 mm) length sensors, the
maximum allowed retraction pressure is 64 psig (5.4 barg). For
36-in. (914.4 mm) length sensors, the maximum allowed
retraction pressure is 35 psig (3.4 barg).
Wear a face shield.
Make sure your footing is stable.
Procedure
1. Push in on the sensor from the back end and slowly loosen the
hex nut of the ferrule fitting.
NOTICE
Do not remove the nut at this time.
2. When the hex nut is loose enough, slowly ease the sensor back
completely until it reaches the retraction stop collar.
NOTICE
Failure to withdraw the sensor completely may result in
damage to the sensor when the valve is closed.
3. Close the ball valve slowly. If there is resistance, the valve may
be hitting the sensor. Double check that the sensor has been
retracted to the retraction stop collar.
12
May 2023
Rosemount pH/ORP Sensors
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