At 11:12 PM 9/9/2009, you wrote:
> > The OP has not provided enough information to allow anyone to do more than
> > make guesses at what he has and what he needs.
>
>I would strongly recommend that the original poster see what happens if he
>treats the sensor as a current loop device:
>
>Connect +24V to +ve lead of sensor
>Connect -ve lead of sensor to load resistor (250 ohms or so)
>Connect other lead of load resistor to ground
>Scope signal across load resistor
>
>If the device is indeed 4-20ma current loop, then the signal should swing
>somewhere between 1 and 5 volts.
>
>-- Bob Ammerman

If the signal goes up to a large DC value, slowly changes over the next
few minutes, then makes an abrupt change, then you know it is
(was, actually) a VRS. ;-)


Spehro Pefhany --"it's the network..."            "The Journey is the reward"
speff@interlog.com             Info for manufacturers: http://www.trexon.com
Embedded software/hardware/analog  Info for designers:  http://www.speff.com



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