will
be restored.
If this error occurs the calibration
process
can be continued for other frequencies.
4.5.7 RESPONSE SWITCH
This switch
is not used during the transducer
SPL Calibration
Mode.
Operations of the switch are not processed.
4.5.8 HL DISPLAY
a.
This display performsthe 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.
c.
When the stimulus is ON,
the HL display will show the
required transducer output level in
dB
SPL in the format
xxx.x
using digits 1, 2, 3 and 4.
This value is the sum of
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
turned
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:
LOW BAT).
4.5.12
"+"
LCD SEGMENT
This
segment is not used during the transducer
SPL Calibration
Mode and will remain off.
23
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