Fluke 8010A User Manual

OPERATION
APPLICATIONS
3.
Record the
Multimeter
reading
obtained
in
Step 2.
4.
Proceed
with
the
resistance
measurement
and
subtract
the
value
of Step
3
from
the
Multimeter
reading.
1.
DC
VOLTAGE
MEASUREMENTS
Loading
Error in
%
=
1 00
x Rs
-r
(
Rs
+
1
0^
)
Where:
Rs
=
Source
resistance in
ohms
of
circuit
being measured.
2. AC VOLTAGE
MEASUREMENTS
First,
determine
input impedance,
as
follows:*
10"^
Zin
=
^
VI +
{2
tr
F
•
Rin
’
Cin)^
Where:
Zin
=
effective input
impedance
Rin
=
10*^
ohms
Cin
=
1 00 X
1
0”^
^
Farads
F
=
frequency in Hz
Then, determine, source loading
error
as
follows:'
Loading Error in
%=
100
X
'
+
Zin
Where: Zs
=
source
impedance
Zin
=
input
impedance
(calculated)
*Vector algebra
required
Figure
2-10.
Circuit
Loading
Error
2-49.
High Resistance
Measurements
(Conductance)
2-50. The conductance
function
of
your Multimeter
can
be used to
measure
high
resistive
(low
leakage)
components (diodes and
capacitors)
while
minimizing
noise
problems.
The three
conductance
ranges
(2
mS,
20
juS,
and 200 nS) can be used
for making
resistance
measurements from 5000 to
I MO, 50 kO to
100 MO, and
5 MO
to
10,000
MO.
Refer
to Figure
2-12
for a list
of
conductance
to
resistance
conversions.
2-51.
Leakage
Resistance
Measurements
(Conductance)
2-52.
Use the conductance
function
for
leakage
testing
on
purely resistive
components
(e.g., cables
and
pcb’s).
NOTE
Under high humidity
conditions,
fingerprints
and other residual
surface contaminants
can
create
their
own leakage
paths.
Clean
all
surfaces
and use
clean
test leads
to minimize
the
effect
of
leakage
paths.
2-53.
Diode Leakage Tests
(Conductance)
2-54.
Diode leakage
(Ir)
tests
require that
the diode
junction
be
reverse
biased
while being
measured.
Connect
the
anode
of the
diode
to the
COMMON
input connector
to
reverse
bias a diode junction.
A good silicon diode
will
produce an in-scale display
reading
on the
200 nS range
when
reverse
biased.
Es
=
Source
voltage
Rl
=
Load
resistance + Source resistance
tm
=
Measured
current
(display reading
in
amps)
Eb
=
Burden
voltage (calculated)
Eb
=
meas.
current [(200/current range
in mA}
+.35]
Error in
%
=
100
x
Eb/(Es
-
Eb)
Error
in
A
= (Eb
x
lm)/(Es
-
Eb)
EXAMPLE;
Es
=
15V
Rl
=
100
kO
Im
=
148.51
tuk
(.14851
mA)
Eb
=
148.51 X
10-'
X
[(200/.2)
+
.35]
=
148.51 X 10
X
1000.35
=
148.56
mV
Max.
error in %
=
100 x [148.56
mV/(15V
-
,14856V)]
=
1.0003%
Add
this
to
the range spec,
accuracy:
Max.
error
in
%
=
1.0003%
±(.2%
+ 2 digits)
Max.
error in A
=
(148.56
mV
x
148.51
;;A}/(15000 mV
-
148.56 mV)
=
1 .486
Add 1.486
yvA to the reading for
correct
current
2-10
Figure 2-11.
Calculating
Burden Voltage
Error

Fluke 8010A Specifications

General

Brand	Fluke
Model	8010A
Category	Multimeter
Language	English