Voltage signal (-0.40mV ~ 7.60 mV) to NI card and LV

[Lathe_Biosas]

Hi

I'm trying to plot a voltage signal (-0.40 mV ~ 7.60 mV) on LabView
unfortunatelly I haven't achieved reading the signal with mV
resolution, my conclusion is that the signal needs to be amplified.

Could anyone please tell me if amplifing the signal would help? If yes
how can it be amplified?

I have an Analog Devices AD595 (Monolithic Thermocouple Amplifier)

http://www.analog.com/UploadedFiles/Data_Sheets/421725987AD594_5_c.pdf

and I was wondering if it would help

Any help or hints would be kindly appreciated
Best Regards

 

[Bob Masta]

Hi

I'm trying to plot a voltage signal (-0.40 mV ~ 7.60 mV) on LabView
unfortunatelly I haven't achieved reading the signal with mV
resolution, my conclusion is that the signal needs to be amplified.

Could anyone please tell me if amplifing the signal would help? If yes
how can it be amplified?

I have an Analog Devices AD595 (Monolithic Thermocouple Amplifier)

http://www.analog.com/UploadedFiles/Data_Sheets/421725987AD594_5_c.pdf

and I was wondering if it would help

Any help or hints would be kindly appreciated
Best Regards

What is the stated sensitivity of the data acquisition board
you are using with Labview? How many bits of resolution?
Many boards have selectable sensitivity ranges, so you
should definitely check into that before adding anything
external. If you do need an external amp, be aware that
thermocouple amps may include cold-junction compensation
that will add a temperature drift to your data. (Don't know
about the part you mentioned).

Best regards,


Bob Masta
dqatechATdaqartaDOTcom

D A Q A R T A
Data AcQuisition And Real-Time Analysis
www.daqarta.com
Home of DaqGen, the FREEWARE signal generator