Sleep Mode - Welch Allyn Grason-Stadler GSI 17 Series Service Manual

The RAM will be tested using a read after write verification
process.
initialized
will be displayed on the HL display and the instrument
halt.
The EPROM will be tested by reading the complete
generate a
stored in the EPROM.
using any of the RAM.
will be displayed on the HL display and the instrument
halt.
The operating mode of the instrument will be determined by
the position of the Cal/Normal Switch and the four Cal
Option Dip
Calibration and Diagnostic Mode initialization.
remaining initialization process will be performed for the
Normal Mode.
The current
initialized
initialized to their currently selected positions.
be
analog hardware
selections.
After
initialization, the instrument will remain idle
all controls active.

2.5 SLEEP MODE

The GSI 17 has a mode which is designed to lengthen battery life.
unit has been left on, under
When the
operation for
Mode. It is important to emphasize that this mode
Sleep
only when the unit is operating with batteries, and is not
available when connected to mains (ac) power.
If a period
operated (front panel, internal, external) the unit will go to
"sleep", thus drawing minirnal current.
Prior to entering the Sleep Mode, the display will be updated to
indicate 3 dashes ' - - - 'I to advise the operator of its
mode status. It will also disable the voltage converter (+7 to -
7 Volt) which will disable much of the analog circuitry.
the unit enters
disconnected,
a STOP state which will halt its operation.
The
Sleep Mode is exited, and normal
either the Present Bar or power switch are toggled.
After each location is tested its value
to 0. If an error is detected, an
checksum which will be compared to a
This test will be performed without
If an error is detected an error code
Switches.
HL selection
to 0 HL. All other controls and displays
will be initialized
more than 5 minutes, the GSI 17 will
of 5 minutes has elapsed
the sleep
the channel will turn OFF and the CPU
Refer to Sections 3 for the
and
the HL display
according to
battery power,
since
mode, all
transducers
operation
will be
error code
will
EPROM to
checksum
will
The
will be
will
All
these
with
without
enter the
exists
any control was
sleep
When
will be
will enter
resumed, when