15
Paragraph 8.4.1.3.6.2: Portable
Equipment Lead to Ground –
Isolated Input Test
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
CHASSIS MEAS POINT (left) 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.
Set the power switch of the EUT to the
ON position.
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 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.
10. Read the current meter for the eight
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.
11. See Figure 4 and Table 4 for a Test
Setup synopsis. This section is based
on NFPA 99 Fig. 10.2.13.5.2.3, see below.
Figure 11 Leakage Test - Isolated
Table 11 Leakage Test - Isolated
Jack/Switch
Position
FEMALE Cordset
To EUT
MALE Cordset
To Mains Power
RED LEAKAGE Jack
To voltage meter
and EUT isolated
patient connections
each in turn
GREEN LEAKAGE Jack
To voltage meter
RED RESISTANCE jack
N/C
MEAS. POINT Switch
CHASSIS
EARTH Switch
TEST IN BOTH
POSITIONS
NEUTRAL Switch
CONNECTED
POLARITY Switch
NORMAL
EUT Power Switch
ON
PASS Result:
<10uA ground
connected
<50uA ground
open
FIGURE 8.4.1.3.6.2 Test Circuit for Measuring
Leakage Current Between Patient Leads and
Ground — 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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