User Manual

34 GMC-I Messtechnik GmbH
8.6.3 Patient Leakage Current – IP
Definition
Patient leakage current is the current which flows to ground or PE
from the patient ports at the running device via the patient.
The AC and the DC component of the current is measured.
Direct Measuring Method
DUT Mains Plug Connected to Test Socket
Test Probe P1 to Sockets 1 and 2
Schematic Diagram
Direct Selection – Setting Polarity
Test Sequence
➭ Set the rotary switch to the I
P
position.
➭ Connect the DUT to the test socket.
➭ In the case of direct measurement, measurement must
be performed with mains plug polarity in both direc-
tions. Select the respective polarity to this end by
pressing the NL/LN key.
➭ Start the test: press the START/STOP key.
➭ After each reconnection to the mains, and as soon as
the first test is started, a mains connection test is exe-
cuted.
➭ Acknowledge the warning which indicates that line
voltage will be connected to the test socket.
➭ Contact the short-circuited inputs for the application
parts with test probe P1.
➭ The measured values are displayed. The measured
value recording symbol shown at the right appears.
Each time this key is pressed, the currently displayed
measured value is saved to the buffer.
➭ Stop the test: press the START/STOP key.
The save symbol appears (floppy disk showing the
number of measured values stored to buffer memory)
and prompts you to save the measured values to an ID
number.
➭ Read the measured values and compare them with the
table of permissible limit values.
➭ Press the ESC key in order to discard the measured
values stored to buffer memory and acknowledge by
pressing the key shown at the right.
Maximum Allowable Limit Values for Leakage Current in mA
Switch
Setting
Meas.
Variant
Measuring Function
Single measurements, rotary switch level: green
Measurements at DUTs with line voltage
I
P
Direct with
test probe
P1
I
P
Patient leakage current, TRMS
I
P~
AC component
I
P=
DC component
Up Test voltage
Measuring
Parameter
Meaning
Measurement type
L/N or N/L Selection of polarity of the line voltage applied to the test
socket
I
P
Test Standard
I
P
Type B
Type
BF
Type
CF
IEC 62353
(VDE 0751-1)
Direct
current
0.01 0.01 0.01
Alt. current 0.1 0.1 0.01
EN 60601
Direct
current
0.01 0.01 0.01
Alt. current 0.1 0.1 0.01