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2.
Installation and Wiring
2.1
Installation
For optimum measurement results, the FU20 should be installed in a location that offers an
acceptable representation of the process composition and DOES NOT exceed the specifications
of the sensor.
This sensor should be installed rain-proof or drip-proof area where rainwater cannot get inside
through the cable inlet/outlet, because insulation of sensor will be decreased due to exposure to
rain or due to condensation at a high humid place.
Take care that screw-in force is not too large.
Special orderis needed for using with PH8HG drop-in guide pipe.
In-line Installation
n
The FU20 sensor is designed for in-line installation, via a bypass loop as an immersion assembly.
For best results the FU20 should be mounted with the process coming towards the sensor and
positioned at least 15° above the horizontal plane to eliminate air bubbles in the glass bulb.
The FU20 can be mounted using the threads on the sensor body (Figure 2.1).
Apply Teflon tape to the appropriate threaded end, then install in the process.
How to apply Teflon tape: Apply seven turns or more Teflon tape from the thread end in piles
(thickness of tape: approximately 0.1 mm, width of tape: approximately 13 mm).
Apply more turns of Teflon tape for leakage.
Screw-in torque of sensor is approximately 4 N∙m.
Teflon tape
Figure 2.1
2.2
Wiring
Mark band of sensor is shown by numeral and pin terminals are used, connect each core wire to
the corresponding terminals of transmitter or converter. For details of wiring, refer to relevant IMs
of transmitter or converter.
PG7
FU20
In-line Installation
< 2. Installation and Wiring >
PG7
FU20
IM 12B07K02-01E
2-1
4th Edition : Nov.20,2018-00
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