Fukuda Denshi FX-7302, Service Manual

Page: 59 / 162

Maintenance
2 - 39
Item
Description
(Acceptance
standard)
Measurement
value
Judge-men
t
Remarks
(Repair
required
Normal condition
(0.5mA or less) mA OK
•
NG
1. Earth leakage
current
Single fault condition (1.0mA or less) mA OK •
NG
Normal condition (0.1m or less) mA OK •
NG
2. Enclosure leakage
current
Single fault condition (0.5mA or less) mA OK •
NG
Normal condition (0.01mA or less) mA OK •
NG
3. Patient leakage
current I
Single fault condition (0.05mA or less) mA OK •
NG
4. Patient leakage
current III
Single fault condition (0.05mA or less) mA OK •
NG
Normal condition (0.01mA or less) mA OK •
NG
5. Patient
measurement
current (AC)
Single fault condition (0.05mA or less) mA OK •
NG
Protective earth terminal/
potential equalization terminal
(0.1
Ω
or less)
Ω
OK
•
NG
Safety inspect
io
n
6. Protective earth
resistance
Power supply cord end/potential
equalization terminal
(0.2
Ω
or less)
Ω
OK
•
NG
(Standard sensitivity) x 1
(10
±
0.2 mm or less) mm OK
•
NG
x 1/2
(5 mm
±
5% or less) mm OK
•
NG
x 1/4
(2.5 mm
±
5% or less) mm OK
•
NG
1. Sensitivity
x 2 (20 mm
±
5% or less) mm OK •
NG
2. Time constant 37% (3.2 to 3.84 sec.) sec
OK
•
NG
0.14Hz (90% or more) % OK •
NG
75Hz (90% or more) % OK
•
NG
150Hz (70% or more) % OK •
NG
3. Frequency
characteristics
10Hz
・
10mm
amplitude
100%
All bonds (105% or less)
% OK
•
NG
4. Common mode
rejection
60 Hz, 20 V, RMS sine wave,
sensitivity 2
4 mm P-P or less
at sensitivity 2
mm
OK
•
NG
5. Counter electrode
voltage
±
550 mV imposed DC voltage
(10 mm ± 5% or less) % OK
•
NG
6. Internal noise
51k
Ω
in parallel with 47nF input
short, sensitivity 2
0.4 mm P-P or less
at sensitivity 2
(Noise : 20
μ V or less) mm
OK
•
NG
10 mm/s
(
±
3% or less) % OK
•
NG
12.5 mm/s (
±
3% or less) % OK •
NG
25 mm/s (
±
3% or less) % OK •
NG
Elec
tri
c per
form
ance
/char
ac
terist
ics inspe
ction
7. Recording speed
50 mm/s (
±
3% or less) % OK •
NG
Overall judgement
OK
•
NG
Machine type Model Serial No.
Location installed Date purchased
Date inspected Inspector Approval
( )
( )