Calibration Mode Dip Switch; Dip Switch S4; Dip Switch S3 - Welch Allyn Grason-Stadler GSI 17 Series Service Manual

The Dip Switches, located beneath the HL dial, will be
in reverse numerical order.
in the order in which we anticipate the frequency of usage
be.

4.8.1 DIP SWITCH S4

IF DEFAULT DATA IS LOADED, DIAGNOSTIC MODE D4 PROCEDURE
NOTE :
MUST BE PERFORMED!
DEFAULT CALIBRATION DATA
All calibration data or other data stored in the EEPROM will have
a corresponding set of default data stored in EEPROM which may be
used to initialize the EEPROM.
Calibration Mode with Dip Switch #4 in the ON position.
Transducer SPL calibration data:
This default data is typical of transducers supplied with the
instrument.
Custom RTL values:
This default data consists of the standard GSI RTL values for the
transducer types supplied with the instrument.
Custom RTL vs. GSI RTL selection status:
This will default to the GSI RTL selection.
Attenuator 2.5 V maximum output level limit:
This will default to an attenuator limit for each stimulus.
Checksum:
The EEPROM checksum
EEPROM after all default data has been stored.

4.8.2 DIP SWITCH S3

CUSTOM RTL SELECTION MODE
This mode enables selection of the displayed custom RTL values
only and does not allow adjustment of the transducer's output
level.
If the user desires to use alternate transducers, this mode would
normally be selected first to set the custom RTL values and
the earphone SPL calibration would be performed.
Calibration Mode is entered with Dip Switch #3 in
position, Dip Switch #3 can be used to switch from the custom SPL
selection to the
Calibration Mode.
The reason for this is that they are
This is performed by entering the
is calculated using the
transducer SPL mode while
described
will
contents of
the
then
When the
the ON
remaining in the