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PXIe-4302/4303 and TB-4302C Calibration Procedure
Complete the following steps to connect the TB-4302.
1.
Install the PXIe-4302/4303 and the TB-4302 in the PXI Express chassis according to the
instructions in the
NI PXIe-4302/4303 and TB-4302/4302C User Guide and Terminal
Block Specifications
.
2.
Configure the PXIe-4139 to voltage output mode and enable remote sensing. Connect the
PXIe-4139 output to the TB-4302 as shown in Figure 2.
3.
Use two 10 k
resistors with 1% or better tolerance to build a voltage divider to bias the
PXIe-4139 output and set the common-mode input of the PXIe-4302/4303 to zero volts.
Connect one resistor between AI+ and AIGND and the other between AI- and AIGND as
shown in Figure 2.
4.
Connect the PXI-4071 to measure the differential voltage across the TB-4302 AI+ and AI-
terminals. A detailed wiring diagram is shown in Figure 2.
Figure 2.
Connecting the TB-4302
Table 2.
TB-4302 Analog Signal Names
Signal Name
Signal Description
AI+
Positive input voltage terminal
AI-
Negative input voltage terminal
AIGND
Analog ground input
4071
4139
HI
LO
SENSE HI
SENSE LO
HI
LO
AI0+
AI0–
AI1+
AI1–
AI31+
AI31–
10 k
Ω
10 k
Ω
TB-4302
