7.2.5. Removal of oscillograms of tension with oscillograph use
Connect щуп an oscillograph for measurement of special signals (special patterns pick-up) to a conclusion "In" the generator.
Way of measurement
The condition at which is made measurement
Oscillogram of tension of serviceable system of ignition
The tension of the generator measured in a point
Examples of oscillograms of tension not serviceable generator
The tension of the generator measured in a point "In", can wavy change, as is shown in drawing. Such wavy change occurs because of operation of a regulator of the tension caused by fluctuations of a current of loading, and is not a sign of malfunction of the generator. If the amplitude of fluctuation of tension reaches considerable size (about 2 In or more idling), it indicates break of a target chain of the generator because of a peregoraniye of a fusible insert between a conclusion "In" and the storage battery. Generating installation in this case is serviceable.
Examples of oscillograms of tension of the faulty generator
The size of the image on the screen (see the table) can be changed by change of factor of strengthening of an oscillograph.
The analysis of oscillograms is best of all for making at operation of the generator under loading (thus the regulator of tension does not disturb measurements). (Measurements can be made at the included headlights.)
Check a condition of a control lamp of the category of a battery room батереи it (is included/is switched off). Completely check power supply system.