clare H101 - Page 98

Ground (Earth) Bond Test
Caution
6
V (no-load
) 0- 40A A
C test Cu
rrent
This test is to ensure that the connection between the earth pin in the
mains plug of the appliance and the metal casing of the appliance is
satisfactory and of sufficiently low resistance. This test is usually done
on Class 1 (Metal Case) products only.
During the test, an AC voltage and the test current is applied between
the earth pin of the mains supply plug and the ground (earth) bond test
lead clip/probe. The test output box must be used for connection to
the EUT for this test. When a ground bond test probe (optional item) is
used the special (shorted) guard switch plug provided should be used
in combination to free user of pressing the guard switch during the test.
A high current is normally used to stress the connection under fault
conditions. The length of the test should be limited to prevent damage
due to overheating. Tests currents of up to 40A AC are available from
this tester. The test output currents, test duration and set resistance
HI/LO values limits are fully programmable. The Tester measures the
test values using a 4-wire measurement method then displays the
resistance measured and allows the user to confirm that sufficiently low
resistance exists within the EUT protective bonding path.
Ca
ution
P
ro
longed use of the ground
bond pr
obe at high currents can lead to
a high probe temperature.
Care sho
ul
d
be taken to avoid touching the
probe tip unde
r these conditions. T
The Tester’s internal over
temperature swi
tch may operate with
prolonged repetitive use of hi
g
h
test c
urrents
. I
n this
in
stance an err
or message will be displaye
d. In
ord
er to proceed with
fu
rther t
e
sts the
Tester must be allo
wed to cool
do
wn.
C
a
u
t
i
o
n
C
t
e
s
t
C
u
betw
al cas
w
e
d
t
o
.
I
n
c
o
o
l
ma
satis
on C
Du
test i
ns plug
factory
ass
s to ens
g of the
and
6
V
(
n
o
sure tha
-
l
o
a
d
t
Gr
r
r
e
n
t
s
e
r
t
o
p
r
o
c
e
w
n
.
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h
e
s
e
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c
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m
a
y
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a
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e
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i
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r
t
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o
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p
a
r
e
s
h
o
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o
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i
t
i
o
n
s
.
a
t
e
w
i
t
h
a
n
e
r
r
s
t
s
t
h
e. The
ement method
ser to confirm
tive bonding
u
t
i
o
n
are availa
n and set res
Tester measu
then display
hat sufficiently
th.
r fault
amage
le fro
stance
es the
the
P
r
within
d allo
the EU
lead
the E
used
in co
A h
con
und bo
switch
ing
must be
nd test
plug pro
ent
ground
used f
probe
s applie
d (earth)
or co
d b
bo