17
Paragraph 8.4.1.3.6.5: Between
Leads (Isolated Input)
1.
Connect the LCT-601 to the EUT using
the female attachment plug cap pigtail.
2.
Connect the LCT-601 to mains power
using the male attachment plug cap
pigtail.
3.
Set the MEAS POINT Switch to the
FLOATING MEAS POINT (right)
position.
4.
Regarding the EARTH switch (second
switch from the top); the test is to be
conducted with the EARTH switch in
both positions.
5.
Set the NEUTRAL switch (third switch
from the top) to the NEUTRAL
CONNECTED position.
6.
Set the POLARITY switch to the
NORMAL position.
7.
The power switch of the EUT is to be
ON.
8.
Connect a calibrated voltage meter
across the RED and GREEN LEAKAGE
banana plugs on the LCT -601. Set it to
read ~10uV.
9.
Connect the BLACK FLOATING
MEAS. POINT banana jack on the LCT-
601 to a patient-connected lead.
10. Connect the RED LEAKAGE banana
plug of the LCT-601 to each patient-
connected lead in turn and conduct
measurements for both test conditions.
Each patient-connected lead is to be
energized by properly switching the
EUT.
11. Testing is done for each patient lead to
all other patient leads; that is, each pair
combination must be tested.
12. Read the current meter for both
conditions noted above and for each
patient-connected output. A passing
result is <10uA (<10uV on the meter
connected to the LCT-601) with the
GROUND switch in the CONNECTED
position, and <50uA (<50uV on the
meter connected to the LCT-601) with
the GROUND switch in the OPEN
position, for any condition.
13. See Figure 14 and Table 14 for a Test
Setup synopsis. This section is based
on NFPA 99 Fig. 10.2.13.5.4.1, see below.
Figure 13 Between Leads (Isolated Input)
Table 13 Between Leads (Isolated Input)
Jack/Switch
Position
FEMALE Cordset
To EUT
MALE Cordset
To Mains Power
RED LEAKAGE Jack
To voltage meter
and EUT
nonisolated patient
connections
GREEN LEAKAGE Jack
To voltage meter
RED RESISTANCE jack
N/C
FLOATING MEAS. PT.
EUT nonisolated
patient connections
MEAS. POINT Switch
FLOATING
EARTH Switch
TEST IN BOTH
POSITIONS
NEUTRAL Switch
CONNECTED
POLARITY Switch
NORMAL
EUT Power Switch
ON
PASS Result:
<50uA
FIGURE 8.4.1.3.6.4 Test Circuit for Measuring
Leakage Current Between Patient Leads —
Nonisolated and Isolated.
Summary of Contents for LCT-601
Page 1: ...LCT 601 NFPA 99 Leakage Current Tester Instruction Manual COMPLIANCE WESTUSA...
Page 3: ...ii Rev 1 1 May 20 2005...
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