Response Switch; Hldisplay; Response Led; Stimulus On - Welch Allyn Grason-Stadler GSI 17 Series Service Manual

will
be restored.
can be continued for other frequencies.

4.5.7 RESPONSE SWITCH

This switch is not used during the transducer
Mode. Operations of the switch are not processed.
4.5.8 HL DISPLAY
a. This display performs the dual function displaying the
Calibration HL level and the SPL to which the transducer
output level must be adjusted for correct calibration.
b. When the stimulus is OFF, the HL display will show the
current Calibration HL level in dB HL in the format xx.0
using digits 1, 2 and 3.
When the stimulus is ON, the HL display will show the
c .
required transducer output level in dB SPL in the format
xxx.x using digits 1, 2, 3 and 4.
the current Calibration HL and the Reference Threshold Level
(RTL) for the current transducer and frequency and does not
indicate correction for the sound level meter frequency
response.

4.5.9 RESPONSE LED

This LED is used to indicate the correct storage of calibration
data in the EEPROM when the Extended Range Pushbutton is
operated. This LED is normally OFF and will be turned ON for 2
seconds after the calibration data has been stored and verified.
If the data is not stored correctly the LED will remain off and
the word "CAL" will be flashed on the HL display and then the
previously displayed transducer output level SPL value will be
restored.
4.5.10 STIMULUS ON LED
This LED is used to indicate the ON or OFF state of the stimulus.
While the stimulus is OFF the LED will be OFF and will be
ON while the stimulus is ON.

4.5.11 LOW BATTERY SEGMENT

This LCD segment will indicate a low battery voltage condition as
in the Normal Mode (ie:

4.5.12 "+" LCD SEGMENT

segment is not used during the transducer
This
Mode and will remain off.
If this error occurs the calibration
LOW BAT).
SPL Calibration
This value is the sum of
SPL Calibration
process
turned