Yokogawa IR400 - Manual (Page 89)

7- 8
IM 11G02N01-01E
7.3.5 Replacement of fuse on analyzer unit
Note) Before the following work, be sure to remove the cause of blown fuse (short, etc) and
repair.
(1) Turn OFF the main power supply SW of
the analyzer.
(2) Loosen setscrews (4 pcs.) from the top of
the analyzer and remove the top cover.
(3) Turn the fuse holder (shown in Fig. 7-3)
counterclockwise and put it out, and the cap
will be removed. Remove the fuse
(250 V AC/3 A) from the holder. Replace it
with a new one .
(4) Mount the fuse holder cap and cover for
analyzer indication unit in the reverse
procedure. Turn ON the power supply SW.
The work will be completed if the analyzer
is normally worked.
(2) Display the moisture interference
compensation screen of the analyzer unit
(see “6.8 Maintenance mode”). Set the
dew point to 2
ЊC by using an electronic
cooler, and introduce bubbled N
2
or air
gas to the analyzer (shown on the figure).
(3) On the screen, select a desired Ch
(component) by pressing the
ENT
key,
adjust the value at right by pressing the
or the key so that the value at left
falls within
±
10 (make it as close to 0 as
possible), and then press the
ENT
key to
memorize the value. (Exiting by “
ESC
”
cancels the adjustment.)
Or, selecting the “ALL” and pressing the
“
ENT
” key, zeroes all components
integrally.
(First, adjust all components by selecting
ALL and then perform fine adjustment
for components one by one using
and
keys.)
* If any components exceed the range of
0 to 10vol%, no adjustment can be
performed (No interference
compensation is required).
Front
Fuse holder
Fig. 7-3
( )
ENT