Re: Calibration problems

On Wednesday 26 July 2006 11:39 am, hhumphre wrote:
> I'm not sure I'm calibrating correctly.  I'm not running the calibration
> in my startup scripts.  I'm doing it manually in the terminal.  I am
> just doing the following:
>
> [root_at_odex comedi_calibrate]# ./comedi_calibrate
> eeprom reference lsb=130 msb=253
> resulting reference voltage: 4.99936
> Id: comedi_calibrate.c,v 1.92 2004/03/29 01:34:15 fmhess Exp
> Driver name: ni_pcimio
> Device name: pci-6036e
> Id: ni.c,v 1.130 2004/09/09 21:43:16 fmhess Exp
> Comedi version: 0.7.70
> Applied calibration for subdevice 0, channel 0, range 0, aref 0
>
> I've read that the NI-6036E board that I'm using generates an internal
> voltage of 5 Volts for calibration.  So the resulting reference voltage
> looks good.

You know, it's not actually doing a new calibration.  It's just reading 
values from a file produced by an old calibration (probably one that 
failed pretty badly) and applying them.  You might try running 
comedi_calibrate with the options "--calibrate --results --verbose" and 
sending me the output.

-- 
Frank