b. GR 1987 calibrator.
Set the GR 1565 sound lever meter to the desired range.
90-100 dB or 110-120 dB.
Use the range that is closest to the expected readings.
Depress the A weighting button.
Turn the calibrator onto either 94 or 114 dB.
Place the calibrator onto the sound level meter.
Adjust sound level meter to the appropriate dB level.
a. Set the sound level meter to the highest dB range using the selector knob on
the right side of the instrument.
b. Depress the A weighting bottom (should already be depressed).
Depress the SLOW button.
d. Stand with the instrument extended in front of you with the sound coming from
e. Turn the range selector knob until the needle registers on the scale.
Record the reading.
If the reading is steady, record as ________dB(A).
If the reading is not steady, record as _____/_____dB(A).
END OF APPENDIX G