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7.2 Daily Inspection
7 - 2
1
OV
E
R
VI
EW
2
SYSTE
M
CO
N
F
IG
UR
A
T
IO
N
3
PERFORMA
N
CE
4
NAMES
 OF
 
THE P
A
R
T
S A
ND 
THEIR SE
TTI
N
GS
5
ROUGH 
PRE-
OPE
R
A
T
IO
PROC
E
DUR
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6
HANDLING
7
MAINT
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NAN
CE
 AND
 
INS
P
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CT
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8
E
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C DIRECTIV
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7.2 Daily Inspection
Daily inspection items are as follows.
7.3 Periodic Inspection
Inspection items to be checked once or twice in six months or one year are as follows.
The following inspection should also be performed when equipment has been moved or modified or the wir-
ing changed.
Number
Inspection Item
Inspection Method
Criterion
Action
1
Module mounting status
Check for loose mounting 
screws and disconnected 
cover
Securely mounted
Retighten screws
2
Connection 
status
Loose termi-
nal screws
Retighten screws with screw-
driver
Not loose
Retighten terminal screws
Proximate 
solderless ter-
minals
Visual check
Proper intervals
Correct
Loose con-
nectors
Visual check
Not loose
Retighten connector fixing 
screws
Number
Inspection Item
Inspection Method
Criterion
Action
1
Surrounding 
environment
Ambient tem-
perature
Make measurement with ther-
mometer or hygrometer
Measure corrosive gas
Display sec-
tion
0 to 40
For use in enclosure, tempera-
ture inside enclosure is ambi-
ent temperature
Other portions 0 to 55
Ambient 
humidity
10 to 90%RH
Atmosphere
No corrosive gas
2
Power supply voltage check
24VDC
Measure voltage across termi-
nals
20.4DC to 26.4V
Change supply power
3
Mounting sta-
tus
Looseness
Move module
Should be mounted firmly
Retighten screws
Dirt, foreign 
matter
Visual check
No dirt, foreign matter sticking
Remove, clean
4
Connection 
status
Loose termi-
nal screws
Retighten screws with screw-
driver
Not loose
Retighten terminal screws
Proximate 
solderless ter-
minals
Visual check
Proper intervals
Correct
Loose con-
nectors
Visual check
Not loose
Retighten connector fixing 
screws