Check that the resistance between pins 1
and 2 of the altitude corrector is 2.0-3.0 kohm.Check that the resistance between pins 2
and 3 of the altitude corrector is 0.5-4.5 kohm at an altitude of
less than 1200 metres.Check that the resistance between pins 2
and 3 of the altitude corrector is 2.5-6.0 kohm at an altitude of
over 1200 metres.