FLIR
IM75
USER
GUIDE
Document
Identifier:
IM75
‐
en
‐
US_AA
16
5.8
Earth
Bond
Resistance
Measurements
(ZERO
Ω
)
1.
Move
the
function
dial
to
the
Earth
‐
bond
resistance
position
(
ZERO
Ω
);
the
Earth
‐
bond
resistance
icon
will
appear.
2.
Insert
the
black
probe
lead
into
the
COM
terminal
and
red
probe
lead
into
the
ZERO
Ohm
terminal.
3.
Before
testing,
short
the
ends
of
the
probes
and
press
the
MODE
button.
The
ZERO
icon
will
appear
on
the
display
and
the
offset
value
will
be
stored.
If
the
test
leads
are
not
shorted
or
if
there
is
residual
resistance,
the
display
will
show
the
>
2.00
ohms
(this
indication
could
be
due
to
faulty
leads,
improper
test
lead
insertion,
or
meter
problem.
Tests
should
not
be
attempted
until
root
cause
of
the
high
resistance
is
determined.
4.
Press
TEST
OK
to
run
a
test.
5.
To
lock
the
test
ON,
press
the
HOLD/LOCK
button
(the
LOCK
icon
will
appear)
and
then
press
TEST
OK
to
test
continuously.
6.
Press
TEST
OK
again
to
stop
the
test.
7.
Note
that
the
Earth
Bond
Resistance
Measurement
mode
can
also
be
used
to
measure
standard
resistance
to
40kohms
NOTE:
The
99
point
Data
Record
memory
function
cannot
be
activated
in
the
usual
way
while
using
the
Earth
Bond
Resistance
function
(since
the
TEST
OK
button
is
used
for
testing
in
this
case
and
not
for
saving
readings).
The
last
reading,
however,
is
held
on
the
display
and
can
then
be
saved
as
described
in
the
Extended
Functionality
section
below
under
Section
5.12.8
Data
Recording
Mode
.
5.9
Continuity
Test
Warning:
Do
not
do
diode,
resistance
or
continuity
tests
before
removing
the
power
from
capacitors
and
other
devices
under
test
during
a
measurement.
Injury
to
persons
can
occur.
1.
Set
the
function
switch
to
the
position.
2.
Insert
the
black
probe
lead
into
the
COM
terminal
and
red
probe
lead
into
the
V
terminal.
3.
Use
the
MODE
button
to
select
continuity
measurement.
The
indicator
will
be
displayed.
4.
Insert
the
black
probe
lead
into
the
COM
(negative)
terminal
and
the
red
probe
lead
into
the
positive
terminal.
5.
Touch
the
tips
of
the
probe
across
the
circuit
or
component
under
test.
6.
If
the
resistance
is
30
±
5
Ω
(nominal)
or
less,
the
meter
will
beep.
Note:
This
threshold
is
user
selectable
in
the
SET
UP
menu
under
the
Cntin
(continuity)
setting:
Range:
10
‐
50
Ω
;
Increment:
1;
Default:
30
Ω
.
