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3.3.2. Mounting the subassembly
The subassembly can be cemented or welded directly in a piping system or in a T-piece of
it. Install the subassembly at a convenient location for maintenance and calibration.
Ensure that there is some place at the top of the fitting (approx. 20 cm) for mounting or
replacing electrodes.
Fig. 3.6 shows some mounting examples. Select the mounting position so that the sensors
are immersed in the process liquid during measurement.
Figure 3.6
3.4. Sensor mounting
3.4.1. General
For stable measurement the glass- and the reference electrode should be mounted in the
holes nearest to the earth connection.
When mounting sensors of Yokogawa in a fitting or subassembly the electrode cables
(Model WU20) should be used (see fig. 3.7).
TRIAX-cable (model WU20-LT) for combined electrode
Cable nut
COAX-cable (model WU20-PC) for single electrode
Cable nut
Figure 3.7
GLUE
GLUE
colour marker
10 cm
colour marker
10 cm
GLUE
PVC
outer screening white
colour marker
inner screening blue
core red
colour marker
screen blue
IM 12B06K01-01E-E
11
3-hole (DN50)
4-hole (DN80)
core red
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