ES601Plus OPERATING MANUAL
MULTIPLE
PE TEST:
If set to "YES", this control will enable multiple protective earth and/or
general resistance measurements within the scope of a manual protective
earth test. Up to ten resistance measurements may be recorded by ES601Plus
in multiple PE mode. If set to "NO" (factory default), a manual protective
earth test is completed by performing a single measurement of resistance.
TEST
LINE CORD
TO EARTH:
If set to "YES" (factory default), this control will enable measurement of line
cord resistance in a manual protective earth test. For this type of test,
resistance is measured between the protective earth terminal on the line cord
plug and the Kelvin Cable of ES601Plus, which would typically be connected
to a grounding stud (protective earth terminal) or the metal enclosure of the
DUT. If set to "NO", point-to-point resistance measurements will then be
enabled by means of the control below.
POINT-TO-POINT
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 of
ES601Plus, and the other being the point of attachment of a test lead which
connects to the "TO DUT CASE" jack of ES601Plus. If set to "NO" (factory
default), point-to-point resistance testing is disabled in manual mode. This
control works with the "MULTIPLE PE TEST" control and "TEST LINE
CORD" control above to provide various protocols for protective earth
testing as described in Section 5.9.
CALIBRATE
OFFSET:
The "OFFSET:" displayed to the right of this control is the resistance of the
test lead used in measuring point-to-point resistance. In a point-to-point test,
the OFFSET calibration shown on Systems Settings Menu #2 is subtracted
from the measured resistance to obtain the result which is displayed by
ES601Plus. The factory default value is 0.050 ohms, which is representative
of a typical test lead of 2-metre length. However, prior to performing point-
to-point tests, the OFFSET of the actual test lead connected to ES601Plus
should be determined. Section 5.9 provides instructions for calibration of the
test lead OFFSET.
The OFFSET calibration differs from other Sequence Controls on Systems
Settings Menu #2 in that it pertains to manual safety tests as w e ll as
automated safety tests.
Setup/Chapter 3 # Page 27
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