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NI 6738/6739 Calibration Procedure
•
Maintain an ambient temperature of 23 °C ±5 °C. The device temperature will be greater
than the ambient temperature.
•
Keep relative humidity below 80%.
Device Setup
1.
Configure the hardware using Measurement & Automation Explorer (MAX).
2.
Launch the Calibration Executive procedure and complete the setup wizard. For
information, refer to
3.
Complete the following steps to create fixtures that will be used to connect the switches to
the DMM.
Create the NI PXI/PXIe-2529 Fixture
1.
On the TB-2636, connect the positive (+) and negative (-) terminals together for C0–C31.
2.
Connect all + terminals together for R0 to R3, and wire them out using two separate wires
to banana connectors labeled
DMM HI
and
DMM HI Sense
.
3.
Connect all - terminals together for R0 to R3, and wire them out using two separate wires
to banana connectors labeled
DMM LO
and
DMM LO Sense
.
To run the procedure, connect the TB-2636 to the PXI/PXIe-2529 switch, and connect the four
banana connectors to the appropriate terminals on the DMM.
Test Limit Equations
These switch tests are not intended to be a validation of the full warranted performance of these
devices. The parameters and limits used in these tests are based on the measurement
requirements of this procedure.
Test Conditions
Follow these guidelines to optimize the connections and the environment during calibration.
•
Keep connections to the device as short as possible. Long cables and wires can act as
antennae, which could pick up extra noise that would affect measurements.
•
Verify that all connections to the NI 6738/6739 are secure.
•
Use shielded copper wire for all cable connections to the device. Use twisted-pair wire to
eliminate noise and thermal offsets.
•
Maintain an ambient temperature of 23 °C ±5 °C throughout the
procedure. The device temperature is greater than the ambient temperature.
Refer to the
section for more information about calibration
temperatures and temperature drift.
Table 4.
NI PXI-PXIe-2529 Test Limits
Thermal EMF
Path Resistance
Relay Count
±9
V
<1
For all relays (0–127), <100,000 for each
Summary of Contents for NI 6738
Page 1: ...PXIe 6738...