YOKOGAWA FC400G User Manual

< 10. Spare Parts and Consumables >
10-2
IM 12F5A1-01E
10.2.3 IndicatorElectrode(K9332MB)
The indicator electrode is always polished with ceramic beads; it gradually wears and
ultimately becomes unusable. This is the primary factor determining the life of the electrode.
Recommended replacement interval of the indicator electrode is one year generally.
The abrasion-based life may be used as a guidance in providing for indicator electrode
replacement.However,recommendedpracticeistokeeponesparealwaysavailablesincethe
electrode could be inadvertently damaged or otherwise become defective.
The same applies to gold alloy indicator electrode (K9334JP) used in combined chlorine
insensitive version.
Note : Refer to the following : cool storage requirements for electrically-conductive silicon grease for indicator electrode.
[ Applying Electrically-conductive Silicon Grease to Indicator Electrode ]
The indicator electrode needs to be electrically connected to the driven shaft.
This is achieved by applying electrically-conductive silicon grease to the tapped part of the
indicator electrode.
Before use, check that this has been done. If not, apply silicon grease as follows. You can
purchase 3 ml tubes of conductive silicon grease from Yokogawa, the part no. is K9044FX.
Be careful not to get this grease on the outer surface, particularly the gold surface.
Applyasmallquantity(halfadrop)ofgreasetoasmallatscrewdriver(about3mmwideblade)
and apply to three equidistant places around the tapped hole, about 3 to 5 mm inside the tip.
Nextscrewtheindicatorelectrodeintothistapped(threaded)hole.Nextunscrewtheelectrode
andcheckthatnogreasehasbeenextrudedtotheoutersurface.Ifithas,removeitwithacloth
that has been wetted with alkaline soap solution.
NOTE
If the conductive silicon grease gets on the electrode surface, measurement accuracy is likely to
bea󰀨ected.
Conductive silicon grease needs to be applied only once.
10.2.4 CounterElectrode(K9332MK)
The counter electrode does not wear like the indicator electrode ; it can be continuously used
without replacement.
However,recommendedpracticeistokeeponesparealwaysavailable,incaseofaccidental
breakage.
10.2.5 Fuse(A1111EF)
Yearlyfusereplacementintheconverterisrecommendedtoavoidunexpectedoperation
stoppage. Fuse (2A
(Note) Fuse may be used more than one year, we recommend periodical replace for planning maintenance.

YOKOGAWA FC400G Specifications

General

Brand	YOKOGAWA
Model	FC400G
Category	Measuring Instruments
Language	English