dtec DYNertia3 - Creating and Saving a Maths Expression; Applying an Expression to a Dyno File

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Chapter 18: Maths Channels
Creating and saving a math’s expression
Note: This expression below could be constructed in many simpler ways to give the same answer; we have chosen one
that demonstrates the use of several concepts.
The expression is typed into the fields-
Following each part of the expression
is a comment. These can be added
as after the “ ‘ “ everything is ignored.
You can notice that the expression
has been given a channel name, this
will appear with the data when
analysing, just as you might call a
conventional input channel “Lambda”
if you had a Lambda meter
connected!
Once created this expression would be tested by pressing the “Evaluate Expression” and the result confirmed by
checking actual outcome and observing “SYNTAX PASS” indicator.
The result would be then saved for future application by using this button.
Applying an expression to a dyno file
In this example we wish to apply an expression to ‘Maths 1’ channel, we would therfore press this “MATH
1” button in ‘Expression Builder’ and then choose the file that contained the expression we want.
When we now close down ‘Expression Builder’ and return to ‘DYNertia3 File
Explorer”, we will now see the green indicator that lets us know an expression
is loaded and ready to apply to a file of choice (1 in this example).
‘Clicking’ on a file of choice in ‘DYNertia3 File Explorer’ will now give you the
option of applying the expression to the file, you will see the columns of
previewed data change to add the new values.
A Window will then appear that
gives the option of changing
the names and scales of the
newly created data channels.
This could be handy if there
are some extremely hi or low
data values that would create a
poorly scaled trace on the
graph screen otherwise.
Re-type the scales, name and
description if required.