Ap301 Sensors - ABB AP300 User Manual

2.1.1 AP301 Sensors

Insertion/Flow-through Type
Warning. Depressurize and drain the process line before
inserting or removing the sensor to prevent spillage.
1. Slide the adaptor sensor retaining ring down from the wired
end of the sensor.
2. Lubricate sensor O-rings before insertion. Insert the sensor
into the adaptor and tighten the retaining collar to prevent the
sensor from being blown out when the process lines are
pressurized.
3. Do not overtighten the threaded sensor adaptor as the inner
diameter of the fitting can be compressed making sensor
insertion or removal impossible. Use PTFE tape or other
sealing compounds on the adaptor threads and tighten only
as tight as necessary to stop leakage around the threads.
4. 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 will
cause erratic and erroneous measurement. Most of the time
this can prevented by rotating the sensor to ensure that 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
Optional
1 in. NPT Flow Cell
(Part No. 7670046)
Fig. 2.2 Installing the AP301
8 IM/AP300 Rev. J | AP300 | Combination pH/Redox (ORP) sensors
5%
Flat Glass
Optional PPS
Threaded Adaptor
Flow
Immersion Type
1. The use of an immersion guard is recommended to protect
the glass sensor.
2. Levels in many tanks, sumps and channels vary. The sensor
must be immersed to the lowest representative level to
ensure the sensor is always immersed in sample.
3. Sensor cables on immersion sensors should be of adequate
length for the BNC to be attached to an extension cable
outside the immersion area.
Flex Conduit and Coupling
(Customer Supplied)
AP301 Sensor with Optional
PVC Immersion Guard Fitted
T.C. Connector (if applicable)
Male BNC
Cable
3
/ in. NPT
4
AP301 Sensor