Fluke 5790B, Руководство по обслуживанию

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Calibration Adjustment and Verification
Calibration Verification
3
3-37
Calibration Verification
Main input verification is presented first, followed by WIDEBAND input
verification.
Note
All performance limits specified in the test records apply to 90-day
specifications for the Product. For Wideband verification, the 2 year
or 1 year specifications are used where there are no 90 day
specifications. If limits to other specifications are desired, the test
records must be modified.
Note
Equivalent equipment and methods, either manual or automated,
may be substituted for the following verification tests as long as the
same points are tested, and equipment and standards used are at
least as accurate as those specified. If standards are less accurate
than specified, appropriate tolerance limit and/or accuracy
reductions must be made to achieve equivalent results.
Verifying the DC Voltage Performance of the Main Input
The calibration verification of the main input dc voltage is done on Input 2.
Although equivalent for transfer function to Input 1, Input 2 is recommended for
the dc voltage function as it offers low thermal connection via the binding posts,
thus minimizing thermals errors. The equipment listed in Table 3-11 is required
for the calibration of the dc voltage function. The Fluke 5730A provides for
reasonable test uncertainty ratio, especially if it is calibrated to its 90 day
specification limits and within the 90 day calibration interval.
Table 3-11. Required Equipment for Calibration of DC Voltage
Required Equipment Manufacture and Model
Multifunction Calibrator Fluke 5730A*
Low-Thermal Test Leads Fluke 5440B-7002 or equivalent
*The 5730A may be used with its characterized values to improve the TUR.
The 90 day specifications are used in the product dc voltage performance
verification (Table 3-12). To evaluate against the 1 year specifications, create a
custom table of the same format where the limits are calculated using the product
1 year specifications.