Signal Express project document questions

[bon2b]

Hi,

I'm using Signal Express 2009 to log two current signals(4-20mA) from a NI9219 card mounted on cDAQ9172 chassis.

Signal #1 on NI9219 channel ai1 is a pressure signal, scaled unit for this signal is PSIA

Signal #2 on NI9219 channel ai2 is a differential pressure signal, scaled unit for this signal is inch.water

I have no trouble to view the signals on Data View, both are displayed with the correct value with correct engineering unit shown on Y-axis.

But when I display the two signals in Project Document, wierd thing happened: signal #1 is displayed in correct value but in inch.water; while signal #2 is displayed in correct value but in PSIA.

Anybody knows what went wrong?

[Luke_W]

Hey bon2b,

         When I opened your file, The inlet pressure is in psia and the differential pressure is in inches of water in the project documentation. From what I understand, that is what you wanted. Is that correct? If so you might just need to close and reopen it. Are you talking about the compound graph in the project documentation? I dont see any graphs of individual data, so for the compound graphs, both scales are present on the y-axis. 

Luke