Yokogawa FS20 Fittings for pH and ORP - Manual (Page 12)

IM 12B6K1-01E-E
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.
(Model WU20) should be used (see fig. 3-7).
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).
Figure 3-7
10 cm
colour marker
screen blue
core red
10 cm
colour marker
colour marker
outer screening white
core red
inner screening blue Cable nut
Cable nut
colour marker
COAX-cable (model WU20-PC) for single electrode
TRIAX-cable (model WU20-LT) for combined electrode
GLUE
GLUE
GLUE
PVC
10
3-hole (DN50)
4-hole (DN80)