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Threshold [THR <OK]
It is possible to select a threshold level for the lower limit of noise levels which
are used to measure dose.
In the
MENU
display screen use the
arrow keys as required until the
following is displayed: -
Press
and the instrument will display the currently selected Threshold
Level, indicated with an asterisk *.
Scroll through the available options using the
arrow keys: -
Display
-10dB
-5dB
OFF
Press
to confirm or
to cancel and return to the Sound Pressure
Level display screen.
Keypad Lock [LOCK <OK]
In the
MENU
display screen use the
arrow keys as required until the
following is displayed: -
Press
to confirm, the instrument is placed in Lock mode and the
instrument displays the battery status.
To UNLOCK the keypad press the following keys in the sequence shown below:-
The LOCK feature is used to lock the instrument keypad. All keypad functions
are therefore disabled including the POWER key. The function is often used to
avoid inadvertent operation or tampering while the instrument is being used.
i
C
OK
OK
C
OK
OK
THR <OK
-10dB *
LOCK <OK
