dtec DYNertia3 User Manual

www.dtec.net.au
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Chapter 1: Introduction
Features
Overview-
Suitable for chassis and engine dyno designs, either direct or indirect drive to the inertia flywheel. Power measurement
can also be taken from a ‘load cell’ for use on brake style dynos (e.g. water, eddy current, hydraulic, friction). DYNertia3
does not control the actual load on a brake style dyno, the load must be controlled manually (i.e. it’s not closed loop).
For closed loop control of a load please see our optional ‘Load controller’ unit and related chapter.
Software provided handles all data management, analyzing and graphing required for your dyno project with powerful
features yet a ‘clean’ interface. Both Metric and Imperial modes are provided, Power, Torque and setup parameters are
changed from kph/Kw/Nm/ºC to mph/Hp/Ft Lb/ ºF etc.
Comprehensive Manual provided, also design & construction information is available for the mechanical dyno system,
including an Excel spread sheet to assist with choosing and calculating the moment of inertia for your requirements.
Included magnetic sensor (hall effect) has an indicator for diagnostics. Integrated ‘optical isolation’ circuitry in the data
acquisition systems helps limit ignition interference and provides PC protection.
As an inertia dyno, accuracy is only limited by mechanical system variation, internally each rotation is timed to 1μs (1
millionth of a second). Dual microprocessors share the data acquisition and precision timing tasks.
Ideal for portable applications (track days & exhibitions). Power supply can be from a simple 12VDC battery, 7 to18VDC
is required, e.g. a cordless drill or bike battery is ideal! We recommend a battery as resistance to interference and data
acquisition signals is far better than with a ‘plug pack’!
Compact, approximately 110L x 83W x 45H (mm) with a small remote sensor for easy adaptation to your design.
No ignition system adapters are needed for RPM sensing. It can determine engine RPM from shaft RPM by ‘learning’
their relationship (ratio). Up to 8 gears can be learnt and later selected for quick testing in any gear; the ratio can also be
manually entered if no tachometer, simply based on number of sprocket teeth (e.g. for chain drive kart engine dynos).
If an engine RPM input (not otherwise required) from the engine is available, then this can not only be used as engine
RPM but also means the difference between engine and shaft/flywheel RPM can be plotted to show clutch engagement
RPM or reveal wheel slip on a chassis dyno.
Inertia value for up to 3 Inertia mass flywheels can be stored and easily selected for designs with adjustable Inertia mass
to tailor to engine characteristics.
Compensation for Dyno Inertia during ‘brake’ testing is easily applied. Great if you have an inertia dyno, but wish to add
an additional load (brake/retarder) for ‘running in’ engines or ‘steady state’ testing.
Analysing Test Results-
Supports multiple monitors, if a second monitor is available then key Windows can be viewed separately to allow clear
analysis, even if viewing and comparing many test results.
Overlay up to 10 Power and Torque graphs simultaneously, including the ‘Last Run’ which automatically appears after
your Run is completed. Run trace color sets are user selectable, however ‘Last Run’ always graphed in red for quick
identification.
Analyse and compare test results by easily ‘hiding’ any particular Run trace or quickly replacing with other saved Runs
for comparison.
A reference Run trace can be locked so that it always stays on the screen for comparisons against other tests.
Up to 4 sets of Runs can be merged to create a brand new 'averaged' Run. Perfect for getting the most from
analysis. The new generated file appears just like any other in DYNertia3. Comments are automatically attached that
reveal the individual runs that it was generated from for future reference.
All 5 analogue channels are recorded with each Run for analysis and their value at the cursor are shown in a floating
'data box' (which can also be saved to ‘clipboard’). DYNertia3 can overlay 2 chosen data channels with the existing
Power and Torque traces for display or all of the data for any trace can be shown in a separate single Window for
detailed analysis.
Select a graph trace; an onscreen cursor makes the dials (power, torque and RPM/speed) display exactly what was
happening at that point in the test Run.
Advanced torque analysis is provided to graphically display ‘area under the curve’ and related statistics for comparing
multiple traces.

dtec DYNertia3 Specifications

General

Brand	dtec
Model	DYNertia3
Category	Measuring Instruments
Language	English