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TBX-1328 Installation Guide
14
ni.com
depends on the cable length, and on the strain-gauge value and
configuration. The SH32-32-A cable has a resistance (
R
L
) of 0.21
Ω
/m.
Figure 6 shows a typical full-bridge strain-gauge circuit.
To determine the amount of error introduced by the cable, complete the
following steps:
1.
Calculate the total resistance (
R
TL
) of the cable, based on the cable
length.
Note
Remember to include the lead resistance of both V
ex
+ and V
ex
–.
2.
Determine the bridge resistance of the strain gauge (
R
SG
) connected at
the TBX-1328.