10
9. CALIBRATION PROCEDURES
Using a standard acoustic calibrator
1. Make the following switch
settings.
Display : SPL (dBA)
Time constant:
S
SLOW
2. Insert the microphone housing
carefully into the insertion hole
of the calibrator.
3. Turn on the switch of calibrator and
adjust the CAL screw of the
instrument, until the level display
will indicate the desired level.
Note: Our products are all well
calibrated before shipment.
Recommended calibrator cycle
is one year.
Fig 3