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

Fluke 190-062, -102, -104, -202, -204, -502, -504
Service Manual

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

The test steps for channel C and D are only for the models
190-104, 190-204, and 190-504.
To test the ac-coupled input low-frequency accuracy:
1. Connect the Test Tool to the 5502A as for the previous test (see Figure 4-4).
2. Select the Test Tool setup:
a) Recall the setup (Standard Test Tool Setup). Press
b) Press
c)
d) Press
e) Press
f) Press
g) Press
h) Press
3. Use
4. Use
500 mV.
5. Set the 5502A to source the appropriate ac voltage and frequency listed in
Table 4-5.
6. Observe the reading
shown under the appropriate column.
7. Continue through the test points.
8. When you are finished, set the 5502A to 0 (zero) Volt and Standby.
5502A output, V rms
900 mV
900 mV
4-16
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( select
RECALL) and SETUP
press to recall the setup.
ENTER
.
SCOPE
Press F2 (–
READING
and :
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
F2
and use
B
F2
and use
C
F2
and use
D
F2
and use
CLEAR to clear the softkey menu and see the full display.
s TIME ns
to change the time base to lock the time base on 40 ms/div.
mV RANGE
and to set the Input A, B, C and D sensitivity range to
RANGE V
A, B, C,
Table 4-5. Input A, B AC Input Coupling Verification Points
5502A Frequency
60 Hz
5 Hz
Note
, press ENTER , select the setup name, and
...) and select with F1
to select
COUPLING AC.
to select
COUPLING AC.
to select
COUPLING AC.
to select
COUPLING AC.
and and check that they are within the range
D
2 Ch Reading
873 mV to 920 mV
>630 mV
SAVE
F2
,
(–
READINGS)
4 Ch Reading
859 mV to 933 mV
>630 mV