Dear all I would appreciate some help with a maths equation problem I have.
I am writing some software to test our IRcels, these are infra red gas detection sensors used to detect CO2 or hydrocarbons eg pentane. For the test I have to calculate the standard fractional absorbance(X) of the test gas from the following equation. %CO2=(((3.10933*(X*X))+(.5602*X)))/(0.30204-X) For a gas bottle of 2%CO2 I have been given a value of 0.19144 for X so far so good. Plug a value of 0.19144 into the equation and you will get a solution of 1.99999 In reality the gas concentration would not be 2.00 it would probably be 2.05 for example therefore I have to use the equation in an iterative manner, modifying the value of X each time until the solution = 2.05 I have tried changing the value of X by the percentage difference the solution is away from the required solution but this results in under shooting then overshooting the required solution in larger and larger jumps. Can anybody recommend any of the maths functions in labview or just point me in the right direction as maths was never my strongest subject. I am using LV 7.1 on windows 2000 Thanks for any help Ian Lloyd Extn 304 Direct number 023 92288140 _____________________________________________________________________ This message is intended solely for the use of the individual or organisation to whom it is addressed. It may contain privileged or confidential information. If you have received this message in error, please delete accordingly. If you are not the intended recipient, you should not use, copy, alter, or disclose the contents of this message. All information or opinions expressed in this message and/or any attachments are those of the author and are not necessarily those of City Technology Ltd. City Technology Ltd accepts no responsibility for the loss or damage arising from its use, including damage from virus. _____________________________________________________________________ This message has been checked for all known viruses by UUNET delivered through the MessageLabs Virus Control Centre. For further information visit http://www.uk.uu.net/products/security/virus/
