IGN ignition angle measurement module 315
imc CANSAS Users Manual - Doc. Version 1.9 - 05.12.2014© 2014 imc Meßsysteme GmbH
6.11.2 Housing
The installation kit includes pre-mounted brackets. These can be unscrewed either completely to be
removed, or partially to change their angle. This is to make it possible to fasten the module in the test
station area or in a switching cabinet.
6.11.2.1 Grounding bolt
For safe operation according to specifications, the housing must be grounded by means of the grounding
bolt. The module's housing is not electrically in contact with the power supply voltage or with the inputs.
The grounding bolt ensures adequate grounding. Other regions of the housing are mostly not appropriate
for adequate grounding, since the housing has a coat of paint.
6.11.2.2 LEDs
The module comes with an operation status LED using the customary imc CANSAS LED flashing code .
The LED is next to the power supply terminal.
It also comes with four additional green LEDs which indicate for the three input channels (Sparc, Angle,
Ref) whether the signal connected is plausible. The following states can be indicated:
LED shining continuously: Plausible signal with plausible pulse frequency.
LED not shining: No signal or a signal whose pulses can no be detected.
LED flashing very rapidly: A signal with significantly too high pulse sequence has been applied.
The LEDs only roughly reflect the signal state. Please be aware that a rapid transition between states may
cause ambiguous LED flashing patterns, for instance if very slow pulses cause the LED to flash briefly.
When signals are very erratic, it is best to disregard the LEDs.
6.11.2.3 Display
Thanks to the built-in Display unit, it is possible to read measured values even at a distance of several
meters. The Display indicates the momentary ignition angle (in degrees) and the current momentary
RPMs. If the measured values are outside of the valid range, the readout displays "---".
The momentary ignition angle is an averaged value of ignition impulses. All the ignition impulses
extracted from the signal over the configured averaging duration are averaged.
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