How can I change range and gain for PCI-6024e?

[Alinii]

Analog input, PCI-6024e board, Labview 7.0

How can I change the voltage range and the gain, to impove the accuracy?

Thank you!

Alinii

[devchander]

If you are using DAQ mx, setting the high and low limit of the signal in the "create virtual channel.vi" function, will automatically set the range/gain for that channel.

for ex, if you want to measure a singal in range of 2Volts, set input hi and low limits as +/- 2.5 volts respectively and it will automatically do required settings

hope this helps

Regards

Dev

Message Edited by devchander on 04-19-2006 10:52 PM

[rjennings]

How is the gain set if I am using tasks created in measurement and automation explorer.  I am using the daqmx start, read, and stop vi. 

[devchander]

open that task in MAX>>Data Neighbourhood>> DAQmx tasks and select suitable Input Range (High limit and low limit)

this will choose a relevant gain for that channel

Message Edited by devchander on 05-18-2006 07:10 AM

Message Edited by devchander on 05-18-2006 07:11 AM

[Ben Yeow]

Does this automated gain/voltage range still apply for the PCI-6024E if you have the device set up under Traditional NI-DAQ (Legacy) and setting up virtual channels for each measurement input?

[Neil_S.]

Ben,

devchandler is correct.  His advice is also valid for Traditional DAQ.  When you set the ranges in your Traditional NI-DAQ Virtual Channels it automatically chooses appropriate gain settings for the DAQ device.  You want to choose the smallest range that will still contain your signal.

Hopefully that helps.

Regards,

Neil S.
Applications Engineer
National Instruments