Fukuda VaSera VS-2000 Series, Operation Manual

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12-6
Chapter 12 Maintenance and Inspection
Electrical Safety Inspection Methods
Electrical safety-related testing methods and measurement equipment are prescribed in safety test standards. Specialist safety
testing and measurement equipment are required for this measurement. Check that the measurement results do not exceed the
allowable values and record the numerical values.
●
Safety Testing and Measurement Equipment
The descriptions of these testing and examination items presume that quality-controlled specialized electrical safety testing equipment
will be used. It is recommended to use specialized safety testing and measurement equipment to simplify the testing and ensure
accuracy.
For details on safety testing and measurement equipment, contact your local Fukuda Denshi service representative.
●
Inspection Items
The following types of electrical safety inspections should be conducted.
There are following two measurement conditions.
●
Allowable Leakage Current Values
*: indicates the values that apply to this device.
(1) Earth leakage current Leakage current that flows along the protective earth wire
(2) Touch current Leakage current that flows from the enclosure of the device to the earth
(3) Patient leakage current
(From Patient Connection
to Earth) Leakage current that flows from the applied parts to the earth through the patient.
There are two ways to measure, DC and AC.
(4) Patient leakage current
(External Voltage) Leakage current that flows from the device to the earth by the power supply
voltage on the patient in the type F applied parts.
(5) Patient auxiliary current Current that flows through the patient between applied parts.
There are two ways to measure, DC and AC.
(1) Normal condition Measurement in normal usage conditions
(2) Single fault condition Measurement in single fault condition
Leakage Current
(Unit: mA) Type B Type BF Type CF
Normal
Condition Single fault
Condition Normal
Condition Single fault
Condition Normal
Condition Single fault
Condition
Earth leakage current 5 10 5 10 5 10
Touch current 0.1 0.5 0.1 0.5 0.1 0.5
Patient leakage current
(From Patient
Connection to Earth) DC 0.01 0.05 0.01 0.05 0.01 0.05
AC 0.1 0.5 0.1 0.5 0.01 0.05
Patient leakage current
(External Voltage)
― ― ―
5
―
0.05
Patient auxiliary current DC 0.01 0.05 0.01 0.05 0.01 0.05
AC 0.1 0.5 0.1 0.5 0.01 0.05
If a value exceeds the allowable limit during safety inspection, immediately stop using the
device, and replace or repair the defective part properly.
If the device is used without repairing, it may cause serious accident.
WARNING