NI PXI-4110 Calibration Procedure
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© National Instruments
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7
Verifying Voltage Programming Accuracy
To verify the voltage programming accuracy, compare a set of requested voltage test points to
measurements of the actual voltage at the output by the DMM. Refer to Figure 1 for the
necessary connections.
Figure 1.
Voltage Verification Connection Diagram
Table 5 lists the voltage output test points that you must request for each channel with the
NI 4110 and measure with the DMM to complete verification. Take voltage measurements using
the DMM at each voltage test point and compare the reading with the value from the Output
column of Table 5. Verify that the measurement error falls between the tolerances listed in the
Test Limit (V)
column for the iteration of channel
x
in Table 5. If the output voltage that you
measure is outside the test limit, you must adjust the NI 4110.
To ensure that the system has had adequate time to settle, wait one second after requesting a new
voltage before taking a measurement with the DMM.
The voltage measurement test limits in Table 5 are derived from the voltage programming
accuracy specifications plus an offset voltage.
NI 4110
HI
LO
+
–
DMM
Volt
a
ge
Mode
