Welch Allyn GSI 38, Service Manual

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Press the Key and the display will stop flashing.
Use the dB HL dial to adjust the Probe Tone Level to 85.5 dB SPL (+/- 0.9
dB). At this point the Probe Tone Frequency may be verified. It should equal
226 Hz (+/- 6 Hz).
5)
Press the Key to store the data in memory. The display will update to
the following ‘Washing” display.
At this point place the probe in the 2 cc test cavity.
6)
Press the Key to start the microphone calibration process. The
display
will update to the following steady state display.
After a few seconds the SAVED indicator will extinguish and the 1.2 indicator
will change to 1.3. When the cycle is complete the display
will update to the
following “flashing” display.
7 ) Press the Key to return to the Main Calibration Mode Menu.
COMPLIANCE CAL
1)
Use the Hz to position the cursor
Mode position.
2)
Press the Key to enter the Compliance
update to the following “flashing” display.
at the Compliance Cal
Cal Model The display will