Calibration Mode Entry - Welch Allyn Grason-Stadler GSI 17 Series Service Manual

Switch #
s4 Default Data
Loads the default Calibration
data into EEPROM when the
Calibration Mode is entered.
s3 Custom SPL Mode
Enables the selection of user
specified SPL values during
the transducer calibration
procedure when set to the
Custom position.
s2
Not used
Diagnostic Mode
S1
Selects the Calibration Mode
when the Cal/Normal Switch
is set to the Cal position
if this switch is in the OFF
position.
The status of Dip Switches #4 and #1 are read only when the
Calibration Mode is entered.
in its position is processed if the Calibration Mode was entered
with this switch in the ON position.
returned to the OFF position without exiting the Calibration
Mode.
4.3

CALIBRATION MODE ENTRY

The Calibration Mode can be entered via the Cal/Normal Switch at
any time except during the power up initialization phase or when
a stimulus is being presented.
be entered when the initialization is complete or the stimulus
turned off. The indication that the instrument is in the
Calibration Mode will be the non integer value in the format of
xx.x on the HL Display.
During the Calibration Mode initialization process all
will be inactive.
When the Calibration Mode is entered, all LCD segments except the
low battery segment will be turned off.
to the ON position the process of loading the default calibration
data will be started and the LCD display will have all
except
the low battery segment turned on to indicate that the
default data and checksum are being loaded.
display will reinitialize to all segments except the low battery
segment will be off.
Function
Dip Switch #3 is read and a change
In these cases the Cal Mode will
OFF (down) ON (up)
OFF Load
GSI Custom
N/A
N/A
OFF Selected
Then the switch cay be
If Dip Switch S4 is
When completed,
controls
set
segments
the