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Chapter 18: Maths Channels
The maths ‘Expression’ (formula for creating data to populate the maths channels) is saved as special files (.D3EXP),
this file can then be ‘loaded’ into math channel 1 or 2 and when back in the ‘DYNertia3 File Explorer’ Window this can
be attached to any file to add the extra channel.
When you have written a maths expression you can save it to file for later use or recall one from file to
either use or to modify and re-save. Double ‘Clicking’ on the name of the file if it is shown in the
expression list (top Left of Window) will also open it for viewing.
The displayed expression can be cleared from the Window.
When you wish to ‘load’ an expression so that it can be applied to a dyno test file, you will
press the appropriate button here and be prompted to select the expression file you wish
to apply to that particular channel (e.g. press “MATH 2” will allow selection of expression
to apply as math channel 2)
When writing an expression these ‘Operators’ are the basic maths
operations that can be used-
‘Functions’ are calculations and conversions already to use
e.g. HP2KW (converts Horsepower into Kilowatts)
A ‘Constant’ is a value that does not change over the course of a
test run (or they are calculated after the actual run).
Note: The values shown in the Right Hand column are just there for
testing that the expression works, they do not represent the actual
‘constants’ real value in use! They can be altered by ‘Clicking’ on
them and typing.
‘Variables’ can be freely used in your expression. These actually
change during the course of the test run, such as Power, Torque,
Speed or data from any of the 5 input channels.
There are also unallocated variables that you can use, these will be
explained in more detail next.
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