Haltech E6M - Manual (Page 140)

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positive to negative seen in figure E.5a corresponds to the metal being directly in line
with the sensor.
E.2.1 The E6M Internal Reluctor Adaptor
The operation of the Reluctor adaptor is as follows:
The voltage input of the reluctor adapter must first go to a positive peak, which arms
the circuit. When the signal rises to approximately 70 - 80% of the peak value the
reluctor adapter will generate a falling edge, and when the signal crosses zero volts a
rising edge triggers the Haltech ECU. If the wires are reversed and the signal goes
negative first, the Reluctor adapter will generate a pulse but it will NOT trigger the
ECU correctly resulting in incorrect ignition timing.
WARNING:
AN INCORRECTLY WIRED RELUCTOR WILL RETARD IGNITION
TIMING AS RPM INCREASES OR GENERATE MULTIPLE
TRIGGERS. INCORRECT WIRING OF A RELUCTOR TRIGGER
CAN CAUSE SERIOUS PROBLEMS. IF YOU ARE USING A
RELUCTOR PICKUP ENSURE THAT THEY ARE WIRED WITH THE
CORRECT POLARITY.
Normal configuration of the E6M is for a Hall Effect input. To configure the E6M for
a reluctor type pickup it is necessary to change the Trigger Input on the Ignition Set-up
page to Int. Reluctor. This tells the E6M to use the internal reluctor adaptor to convert
the trigger input into a square wave for processing. When this is selected, the Trigger
Gain may be adjusted in the line below the Trigger Input. This gain is used to adjust
the electronics inside the E6H/E6M to provide the best conversion of the reluctor
input signal. Different reluctor sensors will provide different signal amplitudes which
the software allows for, the adjustable gain is designed to allow the user to adjust the
sensitivity of the Reluctor Adaptor. Start with a smaller gain and increase the value
until the Reluctor Adaptor is reading Engine RPM correctly. When the desired level is
achieved the Internal Reluctor Adaptor is now fully configured and ready to convert
reluctor signals for processing.
Following is a diagram showing the trigger input into the internal reluctor adaptor and
the square wave output it provides for processing.
+ V
GND Input Trigger Signal
- V TRIGGER POINT IS RISING EDGE
ZERO VOLT CROSSING
+5-12V
Output Trigger Signal
GND
Figure E.5. Top diagram is the signal from the magnetic reluctor sensor. Bottom diagram is the signal
after modification by the on-board Reluctor Adapter circuit.