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Chapter 20: Trouble Shooting & FAQ’s
Trouble Shooting- Common Issues
When connecting I am unable to ‘Link’.
Check there is greater than 7VDC at DYNertia3’s power input and ensure the USB is connected. Please see the manual
chapter on “ ‘Setup’ Menu Options”, in the ‘Communications’ Setup section it explains how to check the PC has
recognised that DYNertia3 is connected to the USB.
The usual problem is that during software installation the security settings were not set correctly as stated and the USB
‘driver’ software failed to install correctly.
I don’t know that my sensor is working correctly.
After you first power up DYNertia3 controller the status LED will flash briefly twice and then remain on. After the ‘Linking’
process (menu “Setup/Communication”) the sensor operation can be checked via the button “DYNertia3 Sensor Test”.
The indicator and an audible noise can be used to confirm sensor operation during rotation. The indicator lamp/noise
triggers for a short time as the magnet approaches the sensor (only on approach).
If you use a voltmeter on the sensor input pin it should be 5V and then go close to 0V (less than 1V) when the magnet is
under the sensor.
I don’t want to mount a magnet to my flywheel.
In the chapter ‘Hardware Installation’ is discussed alternate sensors i.e. perhaps you wish to sense form metal, rather
than magnetic target. Please contact us for further information if required
Very large and completely unreasonable spikes in the power readings (displayed on graphs as sharp spikes or
“Over” text on the large run summary).
Generally huge variations in Power readings are due to poor RPM data. This can be from ignition interference, poor
operation of the sensor due to mounting issues (vibration or clearances) or poor RPM input from the ‘RPM Adapter’ input
if being used.
- Use suppressed ignition leads and resistive plugs for the testing and ensure all wiring is as far as possible from the
interference source.
- Avoid using the RPM Adapter input as the primary RPM source, just use it for ‘teaching’ the ratio (see ‘RPM Input
options’ chapter in this manual)
- Power DYNertia3 from a battery supply (with no charger fitted) and not mains supply.
A quick test can be done by observing the RPM gauge operation before testing (press the ‘Gauge’ button and run the
engine)
Check the filter settings are sufficient in menu option
“Setup/Software/Graph Smoothness”
Only use what is needed to create suitable graphs, set correctly it
will filter out some of the ‘spikes’ discussed here. It cannot make up
for poor data from sensor faults and large amounts of interference.
Next to each data channel input (“Setup/Sensor Configuration”) is a slider control for that particular input. This is
particularly important for Channel 5 as a load cell will be connected here. This has a major effect on the appearance of
the graphs in brake dyno mode.
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