SG Module Functions

Topics
	Module Properties Functions
	Standard Operation Functions
	Channel Configuration Functions
	BIT Functions
	Interrupt Functions
	Raw Register Access Functions

Detailed Description

While there are several methods of measuring mechanical strain, the most common is with a strain gage. The gage provides electrical resistance that varies in proportion to the amount of strain in the device. The most widely used gage is the bonded metallic strain gage. To measure such small changes in resistance, strain gages are almost always used in a bridge configuration with a voltage excitation source. The general Wheatstone bridge (conventional, 4-arm bridge) consists of four resistive arms with an excitation voltage, Vexc, that is applied across the bridge. NAI's strain gage smart function module uses four independent, isolated input A/Ds. This module is designed to read output signals from a completed Wheatstone bridge (i.e., it can be used with one or more strain gage elements as a completed 4-arm Wheatstone bridge) and is commonly used in applications requiring pressure, weight, and stress transducers interface/measurement.