PXI-6115 input voltage range configuration help

[ContemporaryInsanity]

I need to set the analogue inputs on my PXI-6115 to +/-42V, however using Measurement & Automation Explorer, under Traditional NIDAQ Devices - PXI-6115- Configuring Device 1 : PXI-6115, Analogue Input Tab, the Polarity / Range pull down menu only has -10.0V - + 10.0V available for selection.  Any help gratefully received.

[SachaE]

Hi,

The range inside of MAX should read +/- 10 V, the range of the card with a gain of one.

To see a larger range in your application, you must configure the gain to be less than one. For example, the NI 6110 supports gains of 0.5 and 0.2, which allow ranges of +/- 20 V and +/- 50 V. (Remember that the card supports a maximum of 42 V.)

Depending on the range of your input signal, you would want to use the following gain setting:

Range	Gain Setting
-50 to 50 V (not to exceed +/- 42 V maximum)	.2
-20 to 20 V	.5
-10 to 10 V	1
-5 to 5 V	2
-2 to 2 V	5
-1 to 1 V	10
-500 to 500 mV	20
-200 to 200 mV	50

To set the gain in LabVIEW, use the Hardware Configure VI and set the input range of the signal you want to measure, and the VI will select the best gain. Refer to the link below for an example.

To set the gain using NI-DAQ Function Calls, pass in the gain as an integer. If the gain is 0.5 or 0.2, pass in a -1 or -2 respectively.

http://sine.ni.com/apps/we/niepd_web_display.display_epd4?p_guid=B45EACE3E8A156A4E034080020E74861&p_...

Hope that helps

Sacha Emery

National Instruments (UK)

[ContemporaryInsanity]

That helps a lot.  All working now.  Thankyou very much.