Input A And B Dc Voltage Accuracy Test - Fluke ScopeMeter 123 Service Manual

123
Service Manual

4.5.9 Input A and B DC Voltage Accuracy Test

Proceed as follows:
1. Connect the test tool to the 5500A as for the previous test (see Figure 4-5).
2. Select the following test tool setup:
3. Using
4. Set the 5500A to source the appropriate DC voltage.
5. Observe the main reading and check to see if it is within the range shown under the
6. Continue through the test points.
7. When you are finished, set the 5500A to 0 (zero) Volt, and to Standby.
4-14
Dangerous voltages will be present on the calibration source
and connecting cables during the following steps. Ensure that
the calibrator is in standby mode before making any connection
between the calibrator and the test tool.
•
Press select auto ranging (
•
Press to open the INPUT A MEASUREMENTS menu, and choose:
I
MEASURE on A:
•
Press to open the INPUT B MEASUREMENTS menu, and choose:
I
INPUT B: ON | MEASURE on B:
•
Using change the time base to select manual time base ranging, and lock
the time base on 10 ms/div.
•
Press to open the SCOPE INPUTS menu.
•
Press to open the SCOPE OPTIONS menu, and choose:
I
SCOPE MODE: NORMAL | WAVEFORM MODE:
•
Move the Input A and Input B ground level (indicated by zero icon
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
set the Input A and B sensitivity to the first test point in Table 4-2.
The corresponding range is shown in the second column of the table.
appropriate column.
WARNING
in top of display).
AUTO
VDC
I
VDC
keys move the ground level.
I
SMOOTH
) to the