Test Equipment
The following table lists the equipment NI recommends for the performance verification and
adjustment procedures. If the recommended equipment is not available, select a substitute
using the minimum requirements listed in the table.
Table 1. Required Equipment for Calibration
Required
Equipment
Recommended Model(s)
Parameter
Measured
Minimum
Specifications
Digital
multimeter
(DMM)
Keysight 3458 A
All parameters
except remote
sense accuracy
Voltage: < ±9 ppm
accuracy and < 100 nV
resolution.
Current: < ±25 ppm
accuracy and < 10 pA
resolution.
1 MΩ current
shunt
IET Labs SRL-1M/1Triax
1 μA and 10 μA
current accuracy
< 4 ppm accuracy, <
0.2 ppm / °C tempco.
1 Ω current
shunt
Ohm Labs CS-1
1 A current
accuracy
<65 ppm accuracy, <
5 ppm / °C tempco.
333 mΩ current
shunt
Ohm Labs CS-3
3 A current
accuracy
< 120 ppm accuracy, <
5 ppm / °C tempco.
3 kΩ resistor
Vishay PTF563K0000BYEB Remote sense
accuracy
0.1% 250 mW
Test Conditions
Follow the setup and environmental information below to ensure the PXIe-4139 meets the
published specifications. Test limits in this document are based on the January 2016 edition of
the
PXIe-4139 Specifications
, except for more recently revised remote sense test limits.
•
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 PXIe-4139, 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 PXIe-4139 Calibration Procedure
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© National Instruments
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