Two Tech Calls That Make Me Wince

Question 1: Is there a way to access those NIST fluid properties dynamically within a TK rule? I click on the NIST Fluid Properties Wizard and some program called REFPROP pops up. Is there a way to tie the values from that program with TK.
Answer: Ouch... The REFPROP utility is included with TK to help you research fluid or mixture properties. It includes some nice plotting capabilities. But TK also includes built in fluid property functions that can be used in rules and functions. The on-line documentation summarizes these functions but the easiest way to access them is via the Wizards tab at the bottom of the Navigation bar. Click on Function Wizards and you will see Fluid Properties at the bottom.

Question 2: I have multiple sets of x,y data I want to plot on the same graph. How do I do that?
Answer: Well... You need to copy all the x values in series to a single list and then line up the element numbers of the corresponding y value lists so they are the same as the x values. If you need to maintain the original list elements, then you will need to copy (using the LISTCOPY function) the lists to new lists and then reposition those elements. Meanwhile, the pre-release TK6 I'm using has multiple x-axis lists on the plot subsheet, so this question is about to completely go away. I can't wait!

posted by Todd Piefer @ 4:30 PM