Fluke Biomedical DALE601 - Manual (Page 35)

Operation
Measuring Leakage Current
2
2-11
MAI N S V OLTAGE
CURRE N T AMPS
EARTH RESISTA N CE
EARTH LEAKAGE
E N CLOSURE LEAKAGE
PATIE N T LEAD LEAKAGE
PATIE N T AUX CURRE N T
M.A.P.
EXTER N AL
fcu06.eps
The leakage current displays to 1999 µA.
2. Take measurements under all combinations of the OUTLET switch in
NORMAL and REVERSE , the L2 NEUTRAL switch in CLOSED and
OPEN , and the device power turned ON and OFF .
Note
Be sure to pause in the OFF (middle) position when switching from
NORMAL to REVERSE.
Enclosure (Chassis) Leakage Current
Enclosure Leakage Current (I
C
) flows between the accessible conductive
chassis or enclosure and earth ground, as measured through a 1000 Ω
impedance. Under the condition of an open ground, this current is the same as
the earth current. With ground intact, the current should be very low, reflecting
the m
Ω impedance of the ground wire paralleling the 1000 Ω AAMI load.
Note
Differentiation is made between earth and chassis currents because
the wide use of insulated enclosures makes a conductive chassis
inaccessible. Under this condition, earth current represents total
leakage.
To measure enclosure leakage current:
1. Connect the standard cable (supplied with unit) that has a black coil cord
cable with the clamp with black insulation to the CHASSIS connector on
the top panel of the Analyzer.