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NI PXIe-4339 Calibration Procedure
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© National Instruments
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21
Table 15.
Ratio Mode Accuracy Limits (±4 V/V Range)
Range (V/V)
Excitation
Setting
(V)
Calibrator
Output
(V)
Measured
Excitation
(V)
Test Point
(V/V)
Lower Limit
(V/V)
Upper Limit
(V/V)
High
Low
4
-4
0.625
2.25
Vm_ex_ch#
(calibrator
output)/
Vm_ex_ch#
(
Test Point
) *
(1 - 0.001) -
2498 µV/V
(
Test Point
) *
(1 + 0.001) +
2498 µV/V
0
Vm_ex_ch#
(calibrator
output)/
Vm_ex_ch#
-2498 µV/V
2498 µV/V
-2.25
Vm_ex_ch#
(calibrator
output)/
Vm_ex_ch#
(
Test Point
) *
(1 + 0.001) -
2498 µV/V
(
Test Point
) *
(1 - 0.001) +
2498 µV/V
4
-4
1
3.6
Vm_ex_ch#
(calibrator
output)/
Vm_ex_ch#
(
Test Point
) *
(1 - 0.001) -
1561 µV/V
(
Test Point
) *
(1 + 0.001) +
1561 µV/V
0
Vm_ex_ch#
(calibrator
output)/
Vm_ex_ch#
-1561 µV/V
1561 µV/V
-3.6
Vm_ex_ch#
(calibrator
output)/
Vm_ex_ch#
(
Test Point
) *
(1 + 0.001) -
1561 µV/V
(
Test Point
) *
(1 - 0.001) +
1561 µV/V
4
-4
1.5
5.4
Vm_ex_ch#
(calibrator
output)/
Vm_ex_ch#
(
Test Point
) *
(1 - 0.001) -
1041 µV/V
(
Test Point
) *
(1 + 0.001) +
1041 µV/V
0
Vm_ex_ch#
(calibrator
output)/
Vm_ex_ch#
-1041 µV/V
1041 µV/V
-5.4
Vm_ex_ch#
(calibrator
output)/
Vm_ex_ch#
(
Test Point
) *
(1 + 0.001) -
1041 µV/V
(
Test Point
) *
(1 - 0.001) +
1041 µV/V
4
-4
2
7.2
Vm_ex_ch#
(calibrator
output)/
Vm_ex_ch#
(
Test Point
) *
(1 - 0.001) -
781 µV/V
(
Test Point
) *
(1 + 0.001) +
781 µV/V
0
Vm_ex_ch#
(calibrator
output)/
Vm_ex_ch#
-781 µV/V
781 µV/V
-7.2
Vm_ex_ch#
(calibrator
output)/
Vm_ex_ch#
(
Test Point
) *
(1 + 0.001) -
781 µV/V
(
Test Point
) *
(1 - 0.001) +
781 µV/V
4
-4
2.5
9
Vm_ex_ch#
(calibrator
output)/
Vm_ex_ch#
(
Test Point
) *
(1 - 0.001) -
624 µV/V
(
Test Point
) *
(1 + 0.001) +
624 µV/V
0
Vm_ex_ch#
(calibrator
output)/
Vm_ex_ch#
-624 µV/V
624 µV/V
-9
Vm_ex_ch#
(calibrator
output)/
Vm_ex_ch#
(
Test Point
) *
(1 + 0.001) -
624 µV/V
(
Test Point
) *
(1 - 0.001) +
624 µV/V