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Criterion
Press
MENU
repeatedly until
CRIT < OK
is displayed.
Press
OK
and the instrument will display the options available for CRITERION
Setup.
To change the CRITERION use either the
or
arrow buttons. Pressing
either of these two buttons allows you to scroll through the three available
exchange choices, 80dB, 85dB, 90dB
Note:
The symbol
>
indicates the current selection as you move around the
criterion options.
Threshold
It is possible to select a threshold level for the lower limit of noise levels which
are used to measure dose.
Press
MENU
repeatedly until
THR < OK
is displayed.
Press
OK
once and the instrument will display the currently selected
threshold level, relative to the selected Criterion level. Repeated pressing of
the
or
arrow buttons will alter this figure between 0, -5, -10.
Note:
The symbol
>
indicates the current selection as you move around the
threshold options.
Keypad Lock
Press
MENU
repeatedly until
LOCK?
is displayed.
Press
OK
and the instrument will lock the keypad
.
The status of the battery
will be displayed while the keypad is in lock mode
To UNLOCK the keypad press
C, OK
then
C
respectively
.
The LOCK feature is used to lock the instrument keypad. All keypad functions
are therefore disabled including the POWER button. The function is often
used to avoid inadvertent operation or tampering while the instrument is
being used.
Note:
The LOCK function is only available when the instrument is in PLAY
mode.
