Hioki 3155-01, Instruction Manual

Page: 61 / 366

41
────────────────────────────────────────────────────
5.3 Earth Leakage Current Measurement Mode (ME Equipment)
────────────────────────────────────────────────────
5.3.1 Earth Leakage Current Measurement Mode
Condition of the equipment to be measured Power source polarity
Normal condition Normal polarity
Reverse polarity
Single fault condition Open power lead Normal polarity
Reverse polarity
NOTE
Class equipment
Type B applied part Type BF applied part Type CF applied part
Normal
condi-
tion
Single fault condition Normal
condi-
tion
Single fault condition
Normal
condi-
tion
Single fault condition
Open
power
lead *1
Open
power
lead
Open
power
lead
Earth
leakage
current General
equipment
0.5mA 1mA
− −
0.5mA 1mA
− −
0.5mA 1mA
− −
Special
equipment
and mobile
equipment
2.5mA 5mA − − 2.5mA 5mA − − 2.5mA 5mA − −
Permanently
installed
equipment
5mA 10mA − − 5mA 10mA − − 5mA 10mA − −
5.3 Earth Leakage Current Measurement Mode (ME
Equipment)
Earth leakage current measurement for medical electrical equipment is
performed only when class
equipment has been set. When either class or
internally powered equipment has been set, the earth leakage current key on
the initial screen is non-selectable.
Measurement is possible only when the power cord of the equipment to be
measured has been plugged into the auxiliary power socket of the 3155.
The following combinations are measured under the earth leakage current
measurement.
The measurement current is set to "AC+DC rms."
For the concept of leakage current in medical electrical equipment and its
wiring when using the 3155, refer to Appendix 2.1, "IEC 60601-1 (1988-12) +
am1 (1991-11) + am2 (1995-03)."
By using the automatic measurement mode, it is possible to measure changing
automatically the power source polarity and condition of the equipment to be
measured, and obtain the maximum value of the combination. For details,
refer to Section 5.10.3, "Automatic Measurement Setting."
Measurement types and their allowable values
*1: Interruption of one supply conductor