Lead Connections - Megger DLRO100E User Manual

Lead
connections
Test Leads
Megger,
DLRoloo
A
J'
+
-.t
o .'*5
1:
":
'\
\.'
EI
c1-o-c2
P1,6
-P2
H
<
oK>
c1
Leads
connected
to the instrument
with the
Kelvin
arrangement
below showing correct positioning of
Current (C 1,C2) and
Potential probes
(P1,P2).
The earth terminal
4
is used
to detect
floating
voltage on
the test subject
relative
to the C2
(0 V) terminal.
High floating
voltage on the test subject could present
a hazard
to the
user
and
the
DLRO.
lf the test subiect
is
+200
mV
from the
C2
(0
V)
terminal, test
will
be inhibiteå. The noise symbol
{u
will show
when the test
is
inhibited.
Disconnect
from
the earth terminal
when this feature
is
not
in
use.
The
current terminals (C1 and C2) must
be
connected outside
of
the potential terminals
(Pi
and
P2),
to
ensure accurate readings.
c2
P1
P2
=L
Section
of test piece under test.
P1
P2
C1
C2
DualGroundrM and
DC
Clamp connection
(0v)
:
I
Å
@
As
an additional safety precaution, perform the test
with
both
ends
of the test object grounded.
Connect
the
DC
clamp
to
one of the ground connections. The
DC clamp measures current
flowing through
the ground loop
and
the
DLRO100 compensates
for
this current loss
automatically
resulting in
a
more reliable reading.
Refer
to the
MCPD100L
manual
for
how
to
use
the
DC current
clamp.
Connect the earth connector
to
a
suitable earth. Do
not
leave
the earth connection un-terminated or floating.
DLRO100E, 100X
&
100H
-
1004
wwwme9ger.com
9