User manual

Performance
Test Record
Table 2-3 is a form you can copy and use to record performance verification
test results for the relay multiplexer. Information concerning test limits,
measurement uncertainty, and test accuracy ratio (TAR) is provided below.
Test Limits Test limits are defined for closed-channel contact resistance and DC
isolation using the specifications in Appendix A of the Agilent E1460A
User’s Manual. The closed-channel resistance and DC isolation
specifications are single-sided, (i.e., there is an upper limit or a lower limit,
but not both). In the Performance Test Record, either the Minimum or
Maximum column will be blank.
Measurement
Uncertainty
For the performance verification tests in this manual, the measurement
uncertainties are based on 90-day accuracy specifications for the Agilent
3458A Digital Multimeter. The calculations are shown below.
Closed-channel
Resistance Test
Conditions:
• 4-wire ohms function
• 10 Ω range
• 90-day specifications
• Worst-case reading = 3.5 Ω
M.U. = ( 15ppm of Reading + 5ppm of Range )
= ( 15×10
−6
⋅ 3.5 + 5×10
−6
⋅ 10 ) (Ω)
= 1.03×10
−4
Ω___________
DC Isolation Test Conditions:
• 2-wire ohms function
• 1 GΩ range
• 90-day specifications
• Worst-case reading = 1.2 GΩ (highest resistance that can be
measured with the Agilent 3458A)
M.U. = ( 0.5% of Reading + 10ppm of Range )
= ( 0.005 ⋅ 1.2×10
9
+ 10×10
−6
⋅ 1×10
9
) (Ω)
= 6×10
6
Ω_______
Test Accuracy
Ratio (TAR)
Test Accuracy Ratios are not defined for single-sided measurements, so
all closed-channel resistance and DC isolation measurements have ’NA’
(Not Applicable) in the TAR column.
Agilent E1460A Service Manual Verification Tests 31