Auto-Calibration; Oscilloscope - AC STAG-4 QBOX BASIC User Manual

on the sensor results in immediate indication of the LED diodes. It is also used for checking the
correct operation of the indicator and the switch. When the window is closed (normal operation),
changes in gas level are updated on the LED switch with a delay.
In LED-400 and LED-401 switches, it is also possible to change the sequence of gas level diode
activation (the left one is considered as the first one, bottom one with respect to the buzzer), adjust the
buzzer volume (1-minimum, 4-maximum), adjust the diode brightness (LED-401 also allows automatic
adjustment).

2.6. Auto-calibration

The auto-calibration window is used to calibrate the engine at idle run. After starting and warming up
the engine, when Lambda sensor starts operating, start the auto-calibration. During the auto-
calibration the engine should work at idle run. Switch off air-conditioning and lights and do not turn the
steering wheel. During the calibration, the controller will automatically switch from petrol to LPG. The
controller will be automatically switching on selected LPG cylinders. Once the auto-calibration is
complete, the controller displays a message informing the auto-calibration has finished successfully.
The following messages may appear during the calibration:
During calibration, the following messages may appear:
 No ignition switch – check the connection of the ignition switch
 High/low rpm – engine rpm is too low/high; check the rpm settings

No injection pulses - no signal at the petrol injector ; check the connection of the
emulator's wire

Intake manifold pressure too high - the collector pressure may be not correct; check
the connection of the manifold pressure sensor

Unstable engine operation – manifold pressure and/or rpm signals show excessive
variations. Verify if the selected injectors match engine power, check system tightness
and make sure that air-conditioning is off.

2.7. Oscilloscope

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Fig. 27 Oscilloscope window
within this document, in particular photographs, drawings, illustrations, trademarks, etc
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