Switch
#
Function
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
S1
Diagnostic Mode
Selects the Calibration Mode
when the Cal/Normal Switch
is set to the Cal position
if this switch is in the OFF
position.
OFF (down)
ON
(up)
(up)
OFF
Load
GSI
N/A
N/A
OFF
Selected
Custom
The status of Dip Switches
#4
and
#1
are read only when the
Calibration Mode is entered.
Dip Switch
#3
is read and a change
in its position is processed if the Calibration Mode was entered
with this switch in the ON position.
Then the switch cay be
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.
In these cases the Cal Mode will
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
controls
will be inactive.
When the Calibration Mode is entered,
all LCD segments except the
low battery segment will be turned off.
If Dip Switch S4 is
set
to the ON position the process of loading the default calibration
data
will be started and the LCD display will have all
segments
except
the low battery segment turned on to indicate that the
default data and checksum are being loaded.
When completed,
the
display will reinitialize to all segments except the low battery
segment will be off.
-’
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20
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