Fluke ScopeMeter 190 Series III, Service Manual

Page: 30 / 70

190 Series III
Service Manual
26
c. Press
2
(– READING …) and select with
1
(READINGS 2), and select on
B | V ac .
d. Press
J
to select autoranging (AUTO in upper right LCD edge).
e. Use
j
and
k
to change the sensitivity range to select manual sensitivity ranging and
lock the Input B sensitivity range on 500 mV/div .
f. Press
T
and use
1
to select Input B as trigger source.
3. Set the 5502A to source a sine wave at the first test point in Table 10 .
4. Observe the Input B reading and check that it is within the range shown under the
appropriate column of Table 10 .
5. Continue through the test points.
When you are finished, set the 5502A to Standby.
Input C AC Voltage Accuracy (HF) and Bandwidth Test
Note
The test steps for channel C are only for the 4-channel models.
To test the Input C high frequency automatic scope ac voltage measurement accuracy and
bandwidth:
1. Connect the Test Tool to the 5502A. See
Figure 8 .
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
, then press
2
(READING…) and select READINGS 3 on C | V ac .
c. Press
J
to select autoranging ( AUTO in upper right LCD edge).
d. Use
j
and
k
to change the sensitivity range to select manual sensitivity ranging and
lock the Input C sensitivity range on 500 mV/div .
e. Use
l
to move the Input C trace zero to the center grid line.
f. Press
T
and use
1
to select Input C as trigger source.
3. Set the 5502A to source a sine wave and to the first test point in Table 10 .
4. Observe the Input C reading and check that it is within the range shown under the
appropriate column of Table 10 .
5. Continue through the test points.
When you are finished, set the 5502A to Standby.