Does anyone know the matematic formulas to determine an exposure time? I want to do a spreadsheet based on these formula's but dont know what they are. They are obviously logarithmic functions as can be seen by the layout of the slide rules, but i dont know how to calculate it.

Appreciate any help.

I want to be able to determine by spreadsheet safe working distances based on size and thickness of piping, use and size of collimator, whether pipe is full or empty, any other shielding in area, etc....

By having spreadsheet I can do what if scenarios very easily to determine this.

Re: Mathematical Formula's For Gamma exposures ----------- Start Original Message ----------- : Does anyone know the matematic formulas to determine an exposure time? I want to do a spreadsheet based on these formula's but dont know what they are. They are obviously logarithmic functions as can be seen by the layout of the slide rules, but i dont know how to calculate it. : Appreciate any help. : I want to be able to determine by spreadsheet safe working distances based on size and thickness of piping, use and size of collimator, whether pipe is full or empty, any other shielding in area, etc.... : By having spreadsheet I can do what if scenarios very easily to determine this. ------------ End Original Message ------------

Ice, provide me with your email address. I have some excel spreadsheets that do that.

05:58 Jul-09-2005 Ed Ginzel R & D, - Materials Research Institute, Canada, Joined Nov 1998 ^{1208}

Re: Mathematical Formula's For Gamma exposures Some years ago we provided NDT.net a series of simple problem solving software. These can be freely downloaded at http://www.ndt.net/publicat/bibliog/pss.htm

Exposure times as were determined by the old slide rules are included in the RT ProblemSolver Regards Ed

----------- Start Original Message ----------- : : Does anyone know the matematic formulas to determine an exposure time? I want to do a spreadsheet based on these formula's but dont know what they are. They are obviously logarithmic functions as can be seen by the layout of the slide rules, but i dont know how to calculate it. : : Appreciate any help. : : I want to be able to determine by spreadsheet safe working distances based on size and thickness of piping, use and size of collimator, whether pipe is full or empty, any other shielding in area, etc.... : : By having spreadsheet I can do what if scenarios very easily to determine this. : Ice, provide me with your email address. I have some excel spreadsheets that do that. ------------ End Original Message ------------

Re: Mathematical Formula's For Gamma exposures Thanks Ed. But what are the actual formuala to use to calculate this mathematically. I would like to configure a spreadsheet for my own specific uses and applications.

----------- Start Original Message ----------- : Some years ago we provided NDT.net a series of simple problem solving software. These can be freely downloaded at http://www.ndt.net/publicat/bibliog/pss.htm : Exposure times as were determined by the old slide rules are included in the RT ProblemSolver : Regards : Ed : : : Does anyone know the matematic formulas to determine an exposure time? I want to do a spreadsheet based on these formula's but dont know what they are. They are obviously logarithmic functions as can be seen by the layout of the slide rules, but i dont know how to calculate it. : : : Appreciate any help. : : : I want to be able to determine by spreadsheet safe working distances based on size and thickness of piping, use and size of collimator, whether pipe is full or empty, any other shielding in area, etc.... : : : By having spreadsheet I can do what if scenarios very easily to determine this. : : Ice, provide me with your email address. I have some excel spreadsheets that do that. ------------ End Original Message ------------

Re: Mathematical Formula's For Gamma exposuresIn Reply to IClampers at 03:06 Jul-08-2005 (Opening).

IClampers,

did you ever get this figured out?

I have a formula, however, Im having difficulties fine tuning it... its a little out from the times we are using... I can achieve these times by adjusting a tuning value, but its no help when its for every weld :D

IClampers/ALL ,
I am uploding a capsule to you .about RT formula ++++ other information alsoplease download the attach file ( F F# Film Factor)
Thanks&Regard