DATREND Systems ES601-US, Operating Manual

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ES601-US OPERATING MANUAL
Manual Testing/Chapter 5
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Page 55
TEST
GROUND WIRE
RESISTANCE:
If set to "YES", this control will enable measurement of the ground wire
(power cord) resistance. For this type of test, resistance is measured between
the ground terminal on the power cord connected to the test receptacle of
ES601-US, and the Kelvin Cable which will be connected to a grounding stud
or the metal enclosure of the DUT.
TEST
POINT-TO-PT
RESISTANCE:
If set to "YES", this control will enable measurement of resistance between two
points, one being the point of attachment of the Kelvin Cable, and the other
being the point of attachment of a test lead which connects to the "TO DUT
CASE" jack of ES601-US. If set to "NO", point-to-point resistance testing is
disabled. This control works with the other two controls to provide various
protocols for ground resistance testing as shown in the table below.
MULTI GND
WIRE
POINT-
TO-PT
Test Protocol Test Application
NO YES NO
Measure resistance once, between
Kelvin Cable and test receptacle of
ES601-US
.
Conventional ground resistance test of
equipment which connects to the AC
supply by means of a power cord.
NO NO YES
Measure resistance once, between
Kelvin Cable and "DUT CASE" lead.
The
OFFSET calibration is subtracted
from the measurement to obtain the
final result.
The Kelvin Cable is connected to an
equipotential (grounding) stud located
near the DUT, and the "DUT CASE"
lead connects to the DUT itself.
Single ground resistance test of
permanently-installed equipment which
is directly wired to the AC supply.
Example: test of X-RAY equipment.
YES YES NO
Measure resistance up to 10 times,
between Kelvin Cable and test
receptical of
ES601-US
.
For the first measurement, the Kelvin
Cable is connected to a designated
ground test stud on the equipment
chassis, per the standard test for
power cord-connected equipment.
For subsequent tests, the Kelvin Cable
may be re-attached at arbitrary
locations on the equipment enclosure
to confirm continuity of the ground to
those points.
Multiple ground resistance test of cord-
connected equipment.
Example: test of patient monitor system.