Ap302/3 Sensors - ABB AP300 User Manual

2.1.2 AP302/3 Sensors

Insertion/Flow-through Type
1. Process lines must be shut down and depressurized
before inserting or removing sensors.
2. PTFE tape or other sealing compounds must be applied to
the sensor threads to prevent leakage. Overtightening the
sensor threads may cause internal damage to the sensor.
3. Sensors are sometimes mounted upright into a tee in a
line that is not full. The sensor can then be suspended
above the liquid or may become air-locked. Both
occurrences may cause erratic and erroneous
measurement. This can be prevented by rotating the
sensor and flow cell to ensure it is fully immersed in the
sample.
For horizontal pipe, the preferred mounting position
is in the shaded area. Allowable mounting is
anywhere within the full circumference of the pipe.
Bulb Glass
Fig. 2.3 Installing the AP302/3
T.C. Connector (if applicable)
Male BNC
5%
Flat Glass
AP302/3 for Immersion
Applications
Immersion Type
1. Levels in many tanks, sumps and channels vary. The
sensor must be immersed to the lowest representative
level, to ensure it is always immersed in sample.
2. Sensor cables on immersion sensors should be of
adequate length for the BNC to be attached to an
extension cable outside the immersion area.
Cable
Rear of Sensor and Cable to be Sealed in
Conduit or Pipe (Customer Supplied)
3
/ in. Coupling
4
(Customer Supplied)
Conduit
(Customer Supplied)
AP300 | Combination pH/Redox (ORP) sensors | IM/AP300 Rev. J
Sample Outlet
3
/ in. Flow Cell
4
(Customer Supplied)
Sample Inlet
AP302/3 for Flow Applications
9