YOKOGAWA FC500G, User Manual, Page: 20 / 41

<4. OPERATION>
4-1
IM 12F5A2-01E
4. OPERATION
This chapter chiefly describes the preliminary work to be performed prior to putting into operation.
4.1 Preparation for Operation
4.1.1 Inspection of Piping and Wiring Status
Confirm that wiring and piping are made properly.
4.1.2 Fill with Glass Beads for Electrode Polishing
Put glass beads (accessories) for cleaning the indicator (rotating) electrode into the beads case
in the measuring tank in the following procedure:
(1) As shown in Figure 4.1, mount the electrode assembly to the holding stud. The electrode
assembly is fixed to the measuring tank assembly using two screws.
In doing this, exercise care so that the indicator (rotating) electrode and the counter
electrode are not struck by the measuring tank. Also, do not touch the surface of the
indicator electrode with the fingers.
Fixing screws
(2 pcs.)
Electrode
assembly
Measuring
tank
Holding stud
F4-1.ai
In maintenance position
Figure 4.1 Removal of Electrode Assembly
(2) Remove the beads case from the measuring tank. The new glass beads are normally filled
up to the bottommost notch of the beads case when the indicator electrode is inserted.
Taking care that glass beads do not drop from the beads case. Mount the beads case so
that its slits face the counter electrode.
Beads case
Glass beads
Rubber packing
F4-2.ai
Slits
Counter electrode
(reference electrode)
Indicator electrode
(rotating electrode)
Beads case
Glass beads
The bottommost notch
of the beads case
Figure 4.2 Amount of Glass Beads to be Put into the Beads Case