Fluke 8050A - 4-38. Current Test; 4-40. Resistance and Conductance Tests

MAINTENANCE
LINEAR
VOLTAGE TEST
Table
4-5.
dB
Voltage
Test
INPUT
STEP SELECT
RANGE
LEVEL
1
2
3
4
Short
Circuit
200
mV
dB
10.00
mV
ac
rms
10.00
mV
ac
rms
1.0000V
ac
rms
5.
Disconnect the DMM Calibrator from the
8050A.
6.
On
the
8050A,
set the
POWER
switch to OFF.
7.
Set
the
REF
Z switch to ON
(in).
8.
On
the
8050A,
set the POWER
switch to
ON
and verify that the display reads
600
(the
default reference impedance) for 3 seconds,
then sequences through all stored reference
values
at
a I-second rate.
Stored
reference
impedances are:
50,
75,
93,
110,
125,
135,
150,
250,
300,
500,
600,
800,
900,
1000,
1200,
and
8(000).
NOTE
If
the default reference impedance
of
Step 8 is
not
600,
refer to the
dB
Reference Impedance
Power
Up
Setting procedure and check
if
the
default
reference
impedance
has
been
changed.
9.
This concludes the dB Voltage Test, remove
power from the
DMM
Calibrator
before
dismantling the test setup.
4-38. Current Test
4-39.
Use
the following procedure to verify the proper
operation
of
the ac and de current measurement
functions:
1.
Select
the DC mA function.
2.
Connect the
DMM
Calibrator to the 8050A
as
follows: HI to the
mA
input connector and
LO
to the
COMMON
input connector.
3.
For
each step in Table 4-6, select the range
shown and adjust the DMM Calibrator to the
required
8050A
current input, then verify that
the
8050A display reading
is
within the limits.
4.
Select
the AC
V
function,
20mA range.
FREQUENCY
DISPLAY READING
Below
-75
dB
100
Hz
-37.28
to
-38.28
10
kHz
-37.28
to
-38.28
100
Hz
+02.07
to
+02.37
5.
Adjust the
DMM
Calibrator for
an
output
19.000
mA,at a frequency of
lOOHz.
6.
Verify that the display reads between
18.800
and
19.200.
7.
This concludes the
Current
Test. Remove
power from the
DMM
Calibrator
before
dismantling the test setup.
Table
4-6.
Current
Test
STEP
SELECT
INPUT
DISPLAY
RANGE
READING
1
200µA
190µA
189.41to190.59
2
2mA
1.9
mA
1.8941
to
1.9059
3
20mA
19mA
18.941to19.059
4
200mA
190
mA
189.41to190.59
5
2000
mA
1900
mA
1894.1to1905.9
4-40.
Resistance and Conductance Tests
441.
Use
the following procedure to verify the proper
operation
of
the
resistance
and
conductance
measurement functions:
1.
Select
the
kO
function,
2000.
2.
Connect the
DMM
Calibrator to the 8050A
as
follows: HI to the
V
/kO/S
input connector and
LO
to the
COMMON
input connector.
3.
For
each step in Table 4-7, select the range
shown and adjust the
DMM
Calibrator to the
required
8050A
resistance input, then verify
that the
8050A
display reading
is
within the
limits.
4.
This
concludes
the
Resistance
and
Conductance Tests. Remove power from the
DMM
Calibrator before dismantling the test
setup.
4-7