Interconnections
The form of interconnection required to ensure optimum conditions for verification
measurements will depend on the individual function being verified, and on the
measuring equipment connected to the 9500B's terminals. Suitable connections are
described in the sub-sections detailing the functions' verification procedures.
Verification Points
The accuracy specifications cover the full range of output values which can be generated
by 9500B, and its accuracy can therefore be verified against the specification at any
number of points in these output ranges.
This section recommends a set of verification points.
Specification Limits
For each chosen verification point it will be necessary to know absolute measurement
limits which can be used to judge whether or not the 9500B is performing within its
specification. As mentioned earlier, the accuracy specifications detailed in the 9500B
Extended Specifications found online are absolute accuracies which incorporate all the
uncertainties involved in calibrating the 9500B up to and including those of National
Standards.
Verification Procedure
Suitability
The procedures given in this section to verify the Model 9500B specification are suitable
for verification both after receipt from the factory, or when associated with user-
calibration.
Traceability
Where, to conform to quality standards, the 9500B is required to be traceable to higher
standards; then all equipment used to verify the 9500B specification must also be
traceable to those standards.
9500B Mainframe Verification by Functions
Section 9500B Mainframe Verification by Functions is a guide to the process of verifying
the Model 9500B functions from the front panel. The following topics are covered:
•
DC/Square Function: DC Output
•
DC/Square Function: Square Output
•
LF Sine Function
•
Time Markers Function
•
Load Resistance Measurement Function
•
Pulse Width Function
High Performance Oscilloscope Calibrator
Interconnections
37
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