Fluke ScopeMeter 190 Series III, Руководство по обслуживанию

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ScopeMeter® Test Tool
Performance Verification
15
Input A, B, C, D AC-Coupled Lower Frequency Test
Note
The test steps for channel C and D are only for the 4-channel models.
To test the ac-coupled input low-frequency accuracy:
1. Connect the Test Tool to the 5502A as for the previous test. See
Figure 3 .
2. Select the Test Tool setup:
a. Recall the setup (see Standard Test Tool Setup ). Press
S
,
2
(RECALL) and
select SETUP , press
E
, select the setup name, and press
E
to recall the
setup.
b. Press
P
.
c. Press
2
(– READING …) and select with
1
(– READINGS) and
h i
:
Reading 1, on A, V ac
Reading 2, on B, V ac
Reading 3, on C, V ac
Reading 4, on D, V ac
d. Press
A
and use
2
to select COUPLING AC.
e. Press
B
and use
2
to select COUPLING AC.
f. Press
C
and use
2
to select COUPLING AC.
g. Press
D
and use
2
to select COUPLING AC.
h. Press
I
to clear the softkey menu and see the full display.
3. Use
V
to change and lock the time base on 40 ms/div.
4. Use
j
and
k
to set the Input A, B, C and D sensitivity range to 500 mV.
5. Set the 5502A to source the appropriate ac voltage and frequency in Table 5 .
6. Observe the reading A , B , C , and D and check that they are within the range shown under
the appropriate column.
7. Continue through the test points.
When you are finished, set the 5502A to 0 (zero) Volt and Standby.
Table 5. Input A, B AC Input Coupling Verification Points
5502A Output, V rms 5502A Frequency Reading
900 mV 60 Hz 873 mV to 920 mV
900 mV 5 Hz >630 mV