Aerotech Encoder Conditioning Unit Manual page 7

ECU Hardware Manual
1.1.3. Calibration Procedure
The calibration procedure is required to optimize the gain, balance and offset of the analog input signals in
the ECU interface.These settings are then stored and recalled for initial use at startup.
To calibrate the system, the following sequence should be carried out:
Prior to calibration, AGC should be off. To switch AGC on or off, the calibrate button should be
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pressed for more than 3 seconds. When AGC is on, the CAL/AGC LED will be on and when AGC is
off, the CAL/AGC LED will be off.
Install the readhead and set up to obtain optimum (1 Vpp) signal amplitude
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Enter the calibration routine by pressing the CALIBRATE button momentarily. The calibration
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routine is indicated by slow flashing of the CAL/AGC LED.
Traverse the readhead slowly past the scale until the CAL/AGC LED stops flashing. The calibration
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cycle is now complete.
If calibration fails, the CAL/AGC LED will flash quickly instead of switching off. If this happens the
CALIBRATE button should be pressed momentarily to exit the calibration routine. The calibration procedure
should then be repeated.
If the unit continues to fail calibration, factory default settings should be restored by powering down, then
pressing the CALIBRATE button as power is re-applied. The calibration procedure should then be repeated.
N O T E : To exit the calibration routine at any time, the CALIBRATE button should be pressed
momentarily.
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Encoder Conditioning Unit
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