User's Manual

123
Service Manual
4-16
2. Select the following test tool setup:
• Press to select auto ranging (AUTO in top of display).
Do not press
anymore!
• Press to open the INPUT A MEASUREMENTS menu, and choose:
MEASURE on A: ■ VAC
• Press to open the INPUT B MEASUREMENTS menu, and choose:
INPUT B: ■ ON | MEASURE on B: ■ VAC
• Move the Input A and Input B ground level (indicated by zero icon ) to the
center grid line. Proceed as follows:
Press
to enable the arrow keys for moving the Input A ground level.
Press
to enable the arrow keys for moving the Input B ground level.
Using the
keys move the ground level.
3. Using
set the Input A and B sensitivity to the first test point in Table 4-3.
The corresponding range is shown in the second column of the table.
4. Set the 5500A to source the required AC voltage (NORMAL output, WAVE sine).
5. Observe the Input A and Input B main reading and check to see if it is within the
range shown under the appropriate column.
6. Continue through the test points.
7. When you are finished, set the 5500A to Standby.
Table 4-3. Volts AC Measurement Verification Points
Sensitivity
(Oscilloscope)
Range
1)
(Meter)
5500A output
Volts rms
5500A
Frequency
Reading A-B
200 mV/div 500 mV 500 mV 60 Hz 494.0 to 506.0
500 mV 20 kHz 486.0 to 514.0
2V/div 5V 5V 20 kHz 4.860 to 5.140
5V 60 Hz 4.940 to 5.060
20V/div 50V 50V 60 Hz 49.40 to 50.60
50V 20 kHz 48.60 to 51.40
1)
The 500V and 1250V range will be tested in Section 4.5.14
4.5.11 Input A and B AC Input Coupling Test
Proceed as follows to test the Input A and B AC coupled input lower transition point:
1. Connect the test tool to the 5500A as for the previous test (see Figure 4-5).
2. Select the following test tool setup:
• Use the setup of the previous step (AUTO time base, traces at vertical center).
• Using
select 200 mV/div for Input A and B (500 mV range).