Using The Analog Bar Graph; Using The Min Max Recording Mode - Fluke 8010A User Manual

Use
the
Touch
Hold
mode
(see item
10) to
make
audible diode
tests.
When
the
test
leads are placed across the diode,
a good
diode
or transistor junction
will
cause
the
meter
to
beep
(and
update
the display)
in
the
forward-biased
direction
and remain
silent
in
the reverse-
biased
direction.
A
short or resistance
below about 4000
ohms
will
causea beep
in
both directions.
If
an open
is
detected, the
meter
will
remain
silent
in
both
directions.
Using
the
Analog
Display
The
analog
display
is
easy
to
use and
interpret
It
functions
much
the
same
as
the
needle on an analog meter
without the
mechanical overshoot
inherent
in
needle movements.
The analog
display
is
especially useful
for
peaking and
nulling,
and
observing rapidly
changing
inputs.
The
analog
display
response time
is fast,
and
it
can be used
to
make
approximate
adjustments
quickly.
The 4000-count
digital
display
can
then
be used
for final
adjustment.
The
analog
display
can
also
be used
for limited
diagnostic
purposes.
In
situations
where
rapidly fluctuating signal levels
make
the
digital
display useless, the analog
display
is
ideal.
Like
the needle
on
a Volt-ohm-milliammeter (VOM), the analog
display excels
at
displaying trends, or slowly
changing
signals.
Many
diagnostic routines using the analog
display require
practice.
You
will
usually
be
looking
for
good
or
bad
signal
APPLICATIONS
Using the
MIN
MAX
Recording
Mode
patterns
that
occur over
some
span
of time.
Noisy
resistance
measurements,
for instance,
create
such
patterns.
Therefore,
familiarity
with
analog
display
response and movement
is
necessary
to accurately interpret
a
signal
pattern.
Compare
the analog
display
response
when
making measurements on
a
unit
known
to
be
good,
to
the
analog
display
response
when
making measurements on a
faulty unit
Using
the
MIN
MAX
Recording
Mode
The MIN
MAX
Recording
mode
can be used
to
catch
inter-
mittents
and
turn
on
or
turn off
surges,
verify
performance,
measure
while
you
are
away
("baby
sit"),
or take readings
while you are operating the
equipment under
test
and cannot
watch
the meter.
The
audible
Min
Max
Alert indicates
when
a
new minimum
or
maximum
value
has been
recorded.
You can
select either
a 100
millisecond,
1
millisecond (Peak),
or
1
second
(high accuracy) "response
time" for
recording
minimum
and
maximum
readings.
The
response
time
is
the
length of time an
input
must
stay at
a
new
value
to
record
the
full
change.
The
100 millisecond response time
is
best
for
recording
power
supply surges, inrush currents,
and
finding intermittent
fail-
ures.
This
mode
follows the
update
time
of
the analog
display.
(The
minimum and
maximum
excursions
of
the analog
display
get recorded.)
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