High Performance Oscilloscope Calibrator
9500B Mainframe Verification by Functions
39
Verification Setup
1.
Connections:
Ensure that the 9500B is connected to the DMM as
shown in Figure 3, or via a similar BNC-4mm
adaptor, and that both instruments are powered on
and warmed up.
2.
9500B:
Ensure that the 9500B is in MANUAL mode and
then select the DC/Square; DC Voltage (Positive)
function (from MANUAL mode entry default, press
the WAVEFORM soft key and then press the
soft key on the right of the screen). Select the
required output Signal Channel (1 M
Ω
Load),
trigger channel and Trigger Ratio (if required).
Verification Procedure
Refer to Tables 2 and 3. Follow the correct sequence of verification points as shown on
the tables, and carry out the following operations (1) to (6) at each verification point.
1.
DMM:
Select the correct DCV range for the verification point
Output Voltage.
2.
9500B:
Set the O/P Volts p-p and polarity as required for the
verification point.
3.
4955:
If using the Model 4955 Calibration Adaptor, set its
switch to DCV o/c. Otherwise ensure that the DMM
input is at high impedance.
4.
9500B:
Set Output ON and wait for the DMM reading to
settle.
5.
Amplitude: a.
Measure the DCV output value.
b.
Record this value in the Measured Value column of
the copy of the Table.
c.
Check that the Measured Value is at or between the
Absolute Limits.
6.
Set Output OFF.
