Calculating channels from previous calculations

AndrewS

Hi,

I'm having trouble using the calculator tool to create an output channel. I used the Calculator tool to create an intermediate 208Pb channel that was corrected for radiogenic 208Pb from 232Th. I want to ratio that channel with other Pb isotopes (e.g., 208c/206). However, whenever I try and perform these calculations, the calculator doesn't recognize the 208c channel that I have already created. Any ideas?

Thanks!

Joe

Hi Andrew,

Can you please post what your calculator channel names, expressions and types were? I just tried creating a series of channels that depended on one another and it worked as expected.

Many thanks,

AndrewS

Hey Joe,

Thanks for the response. Here's an image of the calculations.

Cheers,
Andrew

Calculation

Joe

AndrewS

The image did not come through. Can you please email it to support@iolite-software.com?

Bence

AndrewS Thanks for sending that image through. I can see now what the issue is: although the Calculator will allow you to call a new channel a name starting with a number, you won't be able to use that channel in subsequent calculations.

Your current code looks something like:

208c = Pb208_CPS - (Th232*0.37)
208c/206 = 208c / Pb206_CPS

You should give the following a try:

Pb208c = Pb208_CPS - (Th232*0.37)
Pb208c/Pb206 = Pb208c / Pb206_CPS

Please let us know how it goes.

-Bence

AndrewS

Hi Bence,

That works well now! Thanks!

Cheers,
Andrew