4. Installation Specifications
4-12
TI 33Q01J10-01E Feb. 1, 2009-00
Parts Durability
Some parts require periodical replacements. For preventative maintenance, the recommended
intervals to replace parts with a life span of less than 10 years are shown in the table below.
Users can replace parts indicated by “Yes” in the “user replacement”. For other parts, contact
Yokogawa for replacement.
There can be some parts having defined life spans in resale material mounted to a console kit. If
that is the case, replace the parts according to a manual of resale material.
The average ambient temperature shown in the table is the average temperature surrounding the
corresponding parts.
When the parts are installed in a cabinet of Yokogawa product, though varies with actual
installations, in general, the temperature inside of the cabinet is about 10 °C higher than the
temperature outside the cabinet.
Note: Random failures within the recommended replacement intervals may occur in some parts.
The reliability and life span of an electronic equipment greatly depend on the operating
environment. It is essential for ensuring reliable operation and prolonged life span that the
equipment is used not only within the range of environment resistance standards but also in a
more satisfactory environment. For instance, if a piece of equipment is always used at 35 °C
when its operating temperature ranges from 5 to 40 °C, generally its estimated failure rate almost
doubles compared with operation at 25 °C.
If corrosive gas is present in the environment, the corrosion of the equipment’s contacts and
printed circuit boards is accelerated more than in a cleaner environment, resulting in a reduced
life span. Moreover, if dust can be easily generated in the environment, filters must be cleaned
and replaced more often.
LPCKIT
Table Periodic Replacement Parts Having Defined Life Spans (When average LPCKIT ambient
temperature is 30
°C)
Part names
Part
numbers
Recommended
replacement
cycle
Replacement
by user
Remarks
Air filter T9070CB 1 year Yes Wash every 3 months.
Power supply unit S9961UK 8 years No
The electrolytic capacitor is a
part with a defined life span.
LCD unit S9211FA 3 years No –
Fan unit AIP601 4 years Yes –
Operation keyboard S9281FA
– No Depends on frequency of use.
Fuse
S9518VK 3 years Yes
For 100 V AC
(for service outlet)
A1353EF 3 years Yes
For 220 V AC
(for service outlet)
Relay S9725VM
100000
operations
Yes –
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