USE OF GR 1565, SOUND LEVEL METERS
1. Activation of instrument.
a. Slide power switch to "on" position.
b. Check batteries by depressing "BAT Check" button.
Replace batteries if needle does not go past the "BAT" mark on the meter
a. GR 1562 calibrator.
Set the GR 1565 sound level meter to the 110-120 dB scale using the
range selector knob on the right side of the meter.
Depress the A-weighting button.
Insert the microphone adaptor into the calibrator.
Check the calibrator battery.
Turn the dial face counterclockwise to the start position and hold in
The light indicates the battery is good.
Set the calibrator to 1000 Hz.
Dial must be held in start position for at least 3 seconds prior to
Do not stop at the off position.
Place the calibrator onto the sound level meter.
Adjust the sound level meter to 114 dB(A) + 0.5.
Use a jeweler's screwdriver to make adjustments.
Adjust screw to the left of the weighting selector
buttons, inside a small hole.