Fluke ScopeMeter 19 B Series, Руководство по обслуживанию

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Performance Verification
4.6 Scope Input A&B Tests
4
4-11
4.6.3 Input A&B AC Voltage Accuracy Test (LF)
This procedure tests the Volts ac accuracy with dc coupled inputs up to 50 kHz. The
high frequencies are tested in sections 4.6.10 and 4.6.12.
Warning
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.
Proceed as follows to test the Input A and B automatic scope ac Voltage measurement
accuracy:
1.
Connect the test tool to the 5500A as for the previous test (see Figure 4-3).
2. Select the following test tool setup:
•
Recall the created SETUP 1 (see section 4.4.3): press ,
RECALL
,
select
SETUP 1
, press
RECALL SETUP
.
•
Press , then press
INPUT A OPTIONS ...
•
Select
Polarity: Normal | Bandwidth: 20 MHz
•
Press , then press
INPUT B OPTIONS ...
•
Select
Polarity: Normal | Bandwidth: 20 MHz
•
Press
•
Press
READING 1
, and select
on A | V ac
.
•
Press
READING 2
, and select
on B | V ac
.
•
Press to clear the softkey menu, and to see the full screen.
3. Using change the time base to select manual time base ranging. Lock the
time base on 20
μ
s/div for the 20 kHz signals, and on 10 ms/div for the 60 Hz signal.
4. Using and move the Input A and B ground level (indicated by the zero icon
in the left margin) to the center grid line.
5. Using and select manual vertical ranging, and set the Input A and B
sensitivity range to the first test point in Table 4-3.
The sensitivity ranges are indicated in the left and right lower display edge in gray.
6. Set the 5500A to source the appropriate ac voltage.
7. Observe the readings (
1.A
and
2.B
) and check to see if it is within the range shown
under the appropriate column.
8. Continue through the test points.
9. When you are finished, set the 5500A to 0 (zero) Volt, and to Standby.