Martel Electronics 320 - Manual (Page 8)

OPERATION:
The Model 320 calibrator is user friendly and menu
driven. A first time user can normally start operating
the unit with few or no instructions. The following
information is intended to provide a detailed
understanding of the unit.
POWER ON SEQUENCE
The calibrator is turned on or off by pressing the
On/Off key. Each time it is turned on, a series of
internal tests and calibrations are performed. The
start-up procedures provide a pass/fail test of certain
internal circuitry. If the tests determine the unit has an
internal failure, a fault message is displayed and the
unit will not operate. Refer to the Service Information
on page 54 for information on how to contact the
factory.
The start-up calibrations provide for dynamic
recalibration of the internal calibrator support
circuitry, by applying the primary reference voltages
to points in the circuitry and recording the readings as
references for further measurements. The start-up
6