Hioki 3155-01, Instruction Manual

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5.6 Patient Leakage Current Measurement Mode
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5.6.1 Patient Leakage Current Measurement Mode
Condition of the equipment to be measured Power source polarity
Single fault condition 110% voltage applied
(normal polarity)
Normal polarity
Reverse polarity
110% voltage applied
(reverse polarity)
Normal polarity
Reverse polarity
Class equipment
Type B applied part
Single fault condition
110%
voltage
applied
Patient leakage current
− − − 5mA − − − − − − − −
Class equipment
Type B applied part
Single fault condition
110%
voltage
applied
Patient leakage current
− − − 5mA − − − − − − − −
Internally powered
equipment
Type B applied part
Single fault condition
110%
voltage
applied
Patient leakage current
− − − 5mA
Notes 1
and 2
− − − − − − − −
5.6 Patient Leakage Current Measurement Mode
Patient leakage current measurement for medical electrical equipment is
performed only for equipment with a type B applied part.
Plug the power cord of the equipment to be measured into the auxiliary socket
for the 3155, and make a measurement by touching 9170 TEST LEADS to the
test point (applied part), and applying voltage from the optional 9196 APPLY
UNIT. For internally powered equipment, to achieve 250 V output, use the
9196 APPLY UNIT in combination with a regulated power supply. (Other
voltage application units can also be used to make measurements.)
The following combinations are measured under the patient leakage current
measurement.
Measurement types and their allowable values
Note 1: 110% voltage application to internally powered equipment can be either
normal or reverse polarity.
Note 2: For internally powered equipment, for 250 V applications under IEC 60601-1
(1988-12) + am1 (1991-11) + am2 (1995-03) standards, 110% voltage of the
3155’s power source voltage is applied via the 9196 APPLY UNIT.