Signal Conditioning

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dynamic strain measurement

Sir,

My experiment involves the measurement of strain on the specimen on the application of torque.

I'm using SC-2043SG for the quarter bridge ,with an internal excitation of 4.13V.

The problem is that when i apply 1.5 Nm and 2Nm torque, both are showing the same strain, 243 microstrain.

Whereas in the digital multimeter they show .7mV and .9mV respectively.

The strain is supposed to vary , which is not happening for every 0.5Nm. The multimeter is showing a

variation of .1mV for every 0.5Nm increase in torque. But this is not being shown in the strain output. Only

when it reaches 3Nm it shows 486 Nm. But this remains the same even for 4Nm.

external signal conditioning is also not helping.

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Hi indu,

What data acquisition device are you using with the SC-2043 SG?  Also, what DAQ drivers and driver version number are you using?  Is this behavior being shown in both your application and also a test panel within Measurement and Automation Explorer?

Regards,
Andrew W
National Instruments
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thanks for replying ,
 
The DAQ device i m using is PCI -MIO-16E4
The DAQmx Device driver version is 7.5 0f 1
 
 
im attaching the program i made for my application.kindly see through it
 
thanks a lot
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Hi indu,

Since you have been more active on your other forum post related to this subject, please continue any further discussion here.

Regards,
Andrew W
National Instruments
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