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What Are the Differences between the NI 9926 Quarter Bridge Completion Accessory (PN:786990-01) and the High Accuracy Quarter Bridge Completion Accessory (PN:786990-02)?

Updated Dec 12, 2024

Reported In

Hardware

  • NI-9926

Issue Details

The NI 9926 Quarter Bridge Completion Accessory comes in two versions: the standard type (PN:786990-01) and the high accuracy type (PN:786990-02). What are the differences between these two?

Solution

fig1.png

The NI 9926 Quarter Bridge Completion Accessory is a bridge completion module used for strain gauge measurements, containing a resistor identified as R3 in the figure. Here are the main differences between the two models:

PN:786990-01 (Standard Type): Resistor Accuracy: 0.1%
PN:786990-02 (High Accuracy Type): Resistor Accuracy: 0.02%

The primary difference lies in the accuracy of the internal resistor. The high accuracy type (PN:786990-02) is suitable for applications where more precise measurements are necessary.

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