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NI PXI-4110 Calibration Procedure
Test Equipment
Table 2 lists the equipment required to calibrate the NI 4110. If you do not have the
recommended equipment, select a substitute calibration standard using the specifications listed
in Table 2.
Test Conditions
Follow these guidelines to optimize the connections and the environment during calibration:
•
Keep cabling wire as short as possible. Long cables and wires act as antennas, picking up
extra noise that can affect measurements.
•
Verify that all connections, including front panel connections, are secure.
•
Ensure that the PXI chassis fan speed is set to HI, that the fan filters are clean, and that the
empty slots contain filler panels. For more information, refer to the
Maintain Forced-Air
Cooling Note to Users
document available at
ni.com/manuals
.
•
Keep relative humidity between 10% and 90%, noncondensing.
•
Maintain an ambient temperature of 23 °C ± 10 °C for verification procedures and an
ambient temperature of 23 °C ± 1 °C for adjustment procedures.
•
Allow a warm-up time of at least 15 minutes after the NI-DCPower driver is loaded. Unless
manually disabled, NI-DCPower automatically loads with the operating system and
enables the device. The warm-up time ensures that the measurement circuitry of the
NI 4110 is at a stable operating temperature.
Table 2.
Required Equipment Specifications for NI 4110 Calibration
Required Equipment
Recommended
Equipment
Specifications
Digital multimeter
(DMM)
NI PXI-4071
Voltage:
≤
±50 ppm accuracy,
≤
30
μ
V resolution;
Current:
≤
±0.04% accuracy,
≤
50 nA resolution
External load
Clarostat 240C
Power resistor decade box with a
range of 4
Ω
to 25,000
Ω
, an
accuracy of ±10%, and
minimum power rating of 40 W
per decade
Auxiliary power supply
NI APS-4100
11 V to 15.5 V, 5 A
Twisted pair, shielded
cabling wire
—
18 AWG to 22 AWG
Variable power supply
Xantrex HPD 30-10
Variable between 11 V and
15.5 V, 5 A
