Fukuda Denshi FCP-7101, Service Manual

Page: 59 / 170

Maintenance
3 - 25
Checking the enclosure leakage current (current that flows from the
enclosure to the earth terminal of the power outlet)
Measurement condition of the enclosure leakage current
It is required to measure the enclosure leakage current under two
conditions: normal condition and single fault condition.
Judgment criteria
Normal state 0.1 mA or lower
Single fault condition 0.5 mA or lower
Checking the patient leakage current I
Measurement condition of the patient leakage current
It is required to measure the patient leakage current in two conditions:
normal condition and single fault condition.
Judgment criteria
Normal state 0.01 mA or lower
Single fault condition 0.05 mA or lower
Checking the patient leakage current III
Measurement condition of the patient leakage current
Since the patient leakage current is measured with polarity of the power
supply in single fault condition changed, measurement must be made twice
to obtain the values under all conditions.
Judgment criterion
Single fault condition 0.05 mA or lower
Checking the patient measurement current
Measurement condition of the patient measurement current
It is required to measure the patient measurement current in two conditions:
normal condition and single fault condition.
Judgment criteria
Normal condition 0.01 mA or lower
Single fault condition 0.05 mA or lower