NI PXI-4110 Calibration Procedure
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© National Instruments
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13
Configure the DMM using the configuration settings for channel
x
voltage test points and external load settings that you must measure in DC Voltage mode for each
current range to complete verification. For example, the 1 A range requires verification at
0.02 A, 0.25 A, 0.5 A, 0.75 A, and 1.0 A outputs from the NI 4110, taking measurements using
the external DMM and NI 4110 at each point. When taking measurements with the NI 4110, set
the Samples to Average property to
300
.
To ensure the system has had adequate time to settle, wait three seconds after requesting a new
current before taking a measurement with the DMM and the NI 4110.
Verify that the measurement error falls between the absolute limits listed in the
Test Limit
for the
iteration of channel
x
in Table 8. If the measurement error is outside of the test limit, you must
adjust the NI 4110.
Table 8.
4110 Output Parameters and Test Limits for Current Measurement
Accuracy Verification
Channel(s)
Current
Range
Iteration
Equivalent
Resistance
(
Ω
)
Output
(V)
*
Test Limit
(A)
Published
Specification
(A)
0
1 A
1
open
0
†
±0.002000
±0.004
2
5
1.25
±0.002050
±0.004375
3
5
2.5
±0.002500
±0.00475
4
5
3.75
±0.004000
±0.006063
5
5
5
±0.005500
±0.008000
1, 2
1 A
1
open
0
†
±0.002000
±0.004
2
20
±5
±0.002050
±0.004375
3
20
±10
±0.002500
±0.00475
4
20
±15
±0.004000
±0.006063
5
20
±20
±0.005500
±0.008000
