Yokogawa FU20F - Manual (Page 14)

IM 12B6J3-04E-E
14
3. INSTALLATION OF FU20F
For optimum measurement results, the
FU20F should be installed in a location
that offers an acceptable representation of
the process composition and
DOES NOT
exceed the specifications of the sensor.
The FU20F is designed with 3/4” NPT
threaded connections on both ends of the
sensor to allow installation in a wide variety
of applications.
3.1 Typical installation
The FU20F sensor is designed for versatile
in-line, immersion or off-line installation. For
best results the FU20F should be mounted
with the process flow coming towards the
sensor, and positioned at least 15° above
the horizontal plane to eliminate air bubbles
in the pH glass bulb (see Figure 4).
Figure 4: Sensor installation
3.2 Preparing the sensor for use
Remove the sensor from its shipping box
and slide of the so-called ‘wet pocket’, the
tube filled with solution to prevent drying
out of the measuring elements during
shipment or storage.
Although in the sensor all factory calibration
data is stored, it is recommended to
calibrate the sensor before first use.
A general calibration procedure is described
in Section 6 of this Instruction Manual.
3.3 Mounting the sensor
The simplest mounting is to use one of
the 3/4” NPT threaded connection of the
sensor. Apply Teflon tape to the appropriate
threaded end, then install the sensor in the
process (see Figure 5).
Figure 5: Simple mounting of sensor
FU20F
15º Minimum
Horizontal Plane
FU20F
TeflonTape