AI_Configure analog inputs

[Nilkrub]

I have a PCI-6025E card with a VB6 application. I have discovered that I can not get more than +/- 5vdc measurement on any analog input. The specs on the board state +/-10v. I have tried MAX and it appears to allow the board to measure +/- 10vdc. The graphical display shows what one would expect +10 to –10.

When I run the application and try to use AI_configure I do not seem to be able to change any thing. I am using VB6.0 SP6 and NI-DAQ 7.4.1f4 The application is a very simple analog measurement. Take 10 readings slight delay and produce an average.  I have tried input mode in all three modes.

I have spare card and have tried it in two Dell computers. Same result with both cards in both computers. This was a working application. Problems started after HD failure. The board is acting like it will only measure +5 to –5vdc.

Global Const DEVICE_1 = 1

Global Const CHANNELS_ALL = -1

Global Const INPUT_MODE_DIFF = 0

Global Const INPUT_MODE_RSE = 1

Global Const INPUT_MODE_NRSE = 2

Global Const BIPOLAR = 0

Global Const UNIPOLAR = 1

Sub Init_National_Ports()

Dim status As Integer

status = AI_Configure(DEVICE_1, CHANNELS_ALL, INPUT_MODE_RSE, 20, BIPOLAR, 0)

If status <> 0 Then

MsgBox ("Error detected while starting Analog Inputs Status = " & Str$(status)

End If

Exit Sub

For Count = 0 To 9

status = AI_VRead(1, AD0_HP_VOLTAGE, GAIN_1, Voltage)

Call Sleep(20) ' --- just delay a bit between measurments

Average = Average + Voltage

Next Count

Average = (Average / 10)

[Dennis_Knutson]

You posted to the LabVIEW forum and not many here use VB. We like to program with pictures.

I'll take a stab at your problem though. I think the gain has to be set to .5 in order to get the +/- 10V range.

[Nilkrub]

I found it this evening.  The gain setting was not correct.  Some how this application has never see > 5v.  Thank You.

And I hope my next project is with pictures - I always get stuck with the old stuff.   Thanks again.