Yokogawa FD20 Immersion Fitting - Manual (Page 11)

IM12B6K2-01E-E
11
3-3-2. 3-Hole and 4-hole fitting
Unscrew the protector complete with
electrode holder from the lower end of the
fitting (see figure 3-3).
Unscrew the cap of an electrode mouting
set. Pass the electrode cable through this
cap and after that through the fitting.
Mount the other electrode cables in a
similar manner. Pass the electrode cables
and the liquid earth cable through a hose
connection, which is delivered with the
fitting in a plastic pocket.
Attention:
Ensure that the cables have slack remaining
in the fitting. The plug of the electrode cable
must be ± 15 cm out of the lower end so
that torsion will be avoided and
sensor mounting is simplified.
Before screwing the hose connection into
place HAND-TIGHT, some glue must be put
to the screw end (see figure 3-4).
Prepare the sensors to be used in
accordance with the directions for use and
mount them in the fitting as shown in fig.
3-4. For stable measurements the glass
and reference electrode should be mounted
in the holes nearest to the earth connection.
As delivered the O-rings (2x) for water-tight
sealing in the mounting holes are on the
blanking plugs. These plugs are for unused
holes.
To prevent fouling of the contacts, it is
recommended to screw the electrode cable
on the electrode as soon as possible.
ENSURE THAT THERE IS NO MOISTURE
OR DUST IN THE CONNECTION CABLE-
ELECTRODE.
Attention:
To have slack remaining in the fitting the
protector complete with electrode holder
should be turned to the left before fixing
HAND-TIGHT to the fitting.
Fig. 3-4. Mounting cables and sensors
in 3-hole and 4-hole fittings
Liquid earth
cable
Electrode cable
model WU20(D)
Electrode
O-rings
(11x3)
Glue
Protection
hose