Table 1. Required Equipment for Calibration
Required
Equipment
Recommended Model(s) Parameter
Measured
Minimum Specifications
Two digital
multimeters
(DMMs)
NI PXI-4071 All parameters Voltage: < ±200 ppm
accuracy and <30 µV
resolution
Current: < ±0.05%
accuracy and <4 µA
resolution
Programmable
electronic load
Agilent N3302 A or
Sorensen SLM-60-30-150
Load
regulation
Constant current and
constant voltage modes:
sink at least 1 A at 60 V
Two 50 Ω resistors Vishay
PTF5650R000BZEK
Remote sense
output
0.1% tolerance, 1/8 W
1 kΩ resistor Vishay
PTF651K0000BYEK
Remote sense
output
0.1% tolerance, 1/4 W
Test Conditions
The following setup and environmental conditions are required to ensure the NI 4112 meets
published specifications:
• Keep cabling as short as possible. Long cables act as antennas, picking up extra noise that
can affect measurements.
• Verify that all connections to the device, including front panel connections and screws,
are secure.
• Ensure that the PXI chassis fan speed is set to HIGH, that the fan filters (if present) are
clean, and that the empty slots contain slot blockers and filler panels. For more
information about cooling, refer to the Maintain Forced-Air Cooling Note to Users
document available at ni.com/manuals.
• Allow a warm-up time of at least 30 minutes after the chassis is powered on and
NI-DCPower is loaded and recognizes the NI 4112. The warm-up time ensures that the
NI 4112 and test instrumentation are at a stable operating temperature.
• Use shielded copper wire for all cable connections to the device. Use twisted-pair wire to
eliminate noise and thermal offsets.
• To ensure the system has had adequate time to settle, wait one second after requesting a
new current or voltage or after changing a load before taking a measurement.
• Keep relative humidity between 10% and 70%, noncondensing.
NI PXIe-4112 Calibration Procedure | © National Instruments | 3
To Next Page
Loading...
