Page 22
Trouble Shooting:
Question
Answer
My instrument will not turn on?
Check that there is a battery fitted to the
instrument.
Check that the battery is not flat.
What is this white plastic cap
fitted to the top of the
microphone?
This is a protective cover for the sensitive
microphone. You must remove it before
using the instrument.
Where have my results gone?
The GA113 does not have a backup
memory so all readings are lost when the
instrument is switched off. Always take a
note of important readings before
switching off the instrument
My instrument is on but will not
respond to keypad presses?
Have you locked the keypad – see page 10
for details on this function.
I keep getting CAL FAIL when
trying to calibrate my instrument
– what am I doing wrong?
Is the instruments microphone properly
inserted in the calibrator?
Is the calibrator switched on and working?
Has the instrument and/or calibrator
been knocked or moved as the calibration
routine is taking place?
Has the microphone been damaged?
What is the black o-ring inside my
calibrator’s cavity for?
The o-ring is essential to seal around the
microphone stabilising the pressure in the
calibrator’s cavity. If the o-ring is missing
and/or damaged the instrument will not
calibrate properly (see above).
When taking readings the display
is constantly flashing *UR* –
what does this mean?
This means that the noise you are
measuring is below the bottom of the
range you have the instrument selected to.
Try selecting a lower range (see page 11
for details).
My readings are within range but
I keep getting **OL** flashing
on the screen – why is this?
The overload is triggered by the Peak
reading whereas LP and LEQ are rms
figures which are lower. Some noises
feature very high peaks compared to the
rms.
