Fukuda Denshi LX-8000 Series, Operation Manual

Page: 90 / 110

13. Maintenance and Inspection
66
No Check Item Check Procedure Criteria
3. Display, Operation
01 Labels Visually check the labels,
caution labels, etc. Should be clean, clear
and firmly attached.
02 Operation,
Switches and
keys
Check by operating the
switches and keys. Should operate
properly.
03 Display Check that the characters and
waveforms appear on the
display. The characters and
waveforms should be
clearly displayed. The
brightness should be
sufficient.
No Check Item Check Procedure Criteria
4. ECG
01 Input
Impedance*
According to test procedure of
IEC 60601-2-27: 2011
201.12.1.101.3 Should be 2.5 M Ω or
above.
02 Suppression
Characteristic of
Common-Mode
Signal*
According to test procedure of
IEC 60601-2-27: 2011
201.12.1.101.10 Should be 10 mmp-p or
below for standard
sensitivity (sensitivity 1).
03 Transient
Characteristic*
With comprehensive tester,
apply standard voltage of 1
mV, and check the time the
amplitude natural
logarithmically drops and
becomes 37% of the waveform
of 0.04 sec. after the
application of standard voltage. Should be 0.4 ± 0.1
seconds.
(When the time
constant is set to 0.4
seconds.)
04 Frequency
Characteristic*
With comprehensive tester,
apply sinusoidal voltage.
Measure the frequency
characteristic at test voltage of
40 Hz.
According to test procedure of
IEC 60601-2-27: 2011
201.12.1.101.8 Should be 40 Hz (-3 dB)
or above.
05 Heart Rhythm
Detection*
With comprehensive tester,
input both positive and
negative polarity of 0.3 mV and
3 mV with sensitivity 1.
According to test procedure of
IEC 60601-2-27: 2011
201.12.101.15 The heart beat rhythm
should be detected with
sensitivity 1 according
to the peak-to-peak
signal of
0.3 mV and 3 mV.