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Models GA116I, GA216I, GA116B, GA216B, GA257B
Display
Description
Instrument
CAL <OK
Calibrate Instrument
ALL
ET <OK
Set Exposure Time
GA116I/GA216I/GA257B
WTG <OK Set Frequency & Time Weightings
GA116I/GA116B
EXCH <OK
Set Exchange Rate
GA116I/GA257B
CRIT <OK
Set Criterion Level
GA116I/GA257B
THR <OK
Set Threshold Level
GA116I/GA257B
LOCK <OK
Lock Instrument Keypad
GA116I
CONT <OK
Adjust Display Contrast
ALL
Calibration [CAL <OK]
It is recommended that the instrument’s calibration is checked and adjusted
where necessary with a calibrator before readings being taken. The calibration
should be re-checked after taking readings to confirm the validity of the results.
The calibrators recommended for use are the Castle GA601/GA607, which
supply typically 94dB/ 104dB (relative to 20µPa pressure) at a frequency of
1kHz.
Press
to check the battery condition, scroll to the battery indicator screen
using the
arrow keys if required. Replace the battery if the indication is low.
In the
MENU
display screen use the
arrow keys as required until the
following is displayed: -
Press
and the instrument will now display the previous calibration level e.g.
>94.0.
OK
i
CAL <OK
