YOKOGAWA FC400G

< 6. Operation >
6-1
IM 12F5A1-01E
6. OPERATION
6.1 PreparationforOperation
6.1.1 InspectingPipingandCableInstallationCondition
ConrmthatthepipingandwiringtotheFC400Gfreeavailablechlorineanalyzerhavebeencorrectly
installed. For details of wiring, refer to Sec. 3.3.
6.1.2 FillingwithCeramicBeadsforElectrodePolishing
Surface contamination of the indicator electrode results in measured value error. To avoid
contamination-caused error, the electrode surface is continuously polished by ceramic beads during
FC400G operation.
Ceramicbeadsarenotlledintothebeadscaseatfactoryshipment.Thus,pourtheceramicbeads
providedintheaccessoryboxintothebeadscaseasfollowsbeforestartingtheFC400G.
The combined chlorine insensitive version uses glass beads.
Beforeoperation,ceramicbeadsarelledintothebeadscaseofthedetector.
[Howtolltheceramicbeads]
Unscrewtwoxingscrewsatthebottomoftheelectrodemechanismblock(seeFigure6.3)toremove
the measuring tank.
Theceramicbeadsarenormallylleduptothebottommostnotchofthebeadscasewhenthe
indicator electrode is inserted.
F6.1e.ai
Electrode mechanism
block
Measuring tank
Fixing screws
( 2 pcs )
In maintenance position
Counter electrode
(reference electrode)
Indicator electrode
(rotating electrode)
Beads case
Ceramic beads
Beads case cover
The bottommost notch
of the beads case
Figure6.1 MeasuringTankPartsandBeadsCase