Philips pm2521 - Page 29

When making
the AUTO CAL IV
measurement,
the
juP
programs
the
OQ0063
to give a
current
of 1mA
through R606.
The
resulting IV across R606 is
also counted
and
stored in a
RAM
as
a
reference
for
further
rneasurements. In
this case, a
different sensitivity
of the ADC is
chosen
(i.e. IV).
29
5
IRX
C653
C602