Agilent Technologies E1465A Manuel de service télécharger pdf (Page 36)

Measurement

Uncertainty

For the performance verification tests in this manual, measurement

uncertainties are calculated based on the Agilent 3458A Digital Multimeter.

The measurement uncertainty shown in Table 2-2 is the accuracy of the

Agilent 3458A using 90-day specifications. The calculations follow.

Closed Channel

Resistance Test

Conditions:

• 4-wire ohms function, 10 Ω range

• 90-day specifications

• Worst-case reading = 2.7 Ω

M.U. = (15 ppm of Reading + 5 ppm of Range)

= (15x10

-6

* 2.7) + (5x10

-6

* 10) Ω

= 9.05x10

-5

Ω

DC Isolation Test Conditions:

• 2-wire ohms function, 1 G Ω range

• 90-day specifications

• Worst-case reading = 1.2 G Ω (highest resistance that can be measured

with the Agilent 3458A)

M.U. = (0.5% of Reading + 10ppm of Range)

= (0.005 * 1.2x10

) + (10x10

-6

* 1x10

) Ω

= 6.01x10

Ω

Test Accuracy

Ratio (TAR)

Test Accuracy Ratios are not defined for single-sided measurements, so all

measurements have ’NA’ (Not Applicable) in the TAR column.

34 Verification Tests Agilent E1465A/66A/67A Service Manual

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Agilent Technologies E1465A Manuel de service Page 36