Input A, B, C, D Ac-Coupled Lower Frequency Test - Fluke ScopeMeter 190 III Series Service Manual

Input A, B, C, D AC-Coupled Lower Frequency Test

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
2. Select the Test Tool setup:
a. Recall the setup (see
select SETUP, press
setup.
P
b. Press
2
c. Press
Reading 1, on A, V ac
Reading 2, on B, V ac
Reading 3, on C, V ac
Reading 4, on D, V ac
A
d. Press
B
e. Press
C
f. Press
D
g. Press
I
h. Press
V
3. Use to change and lock the time base on 40 ms/div.
j k
4. Use and 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
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
900 mV
900 mV
Standard Test Tool
E
, select the setup name, and press
.
(– READING ...) and select with
2
and use
2
and use
2
and use
2
and use
to clear the softkey menu and see the full display.
5502A Frequency
60 Hz
5 Hz
Note
Setup). Press
1
to select COUPLING AC.
to select COUPLING AC.
to select COUPLING AC.
to select COUPLING AC.
ScopeMeter® Test Tool
Performance Verification
Figure 3.
S 2
, (RECALL) and
E
to recall the
(– READINGS) and
Table 5.
Reading
873 mV to 920 mV
>630 mV
h i
:
15