11
Operation
Sound pressure measurement system (sound level meter) calibration
1. Verify that the power switch of the pistonphone is off.
2. Set the frequency weighting of the sound pressure measurement system (sound
level meter) to "Z" or "C".
3. Select the measurement range of the sound pressure measurement system (sound
level meter) so that 114 dB can be measured.
4. Carefully insert the microphone of the sound pressure measurement system (sound
level meter) fully into the coupler of the pistonphone.
Important
When inserting the microphone into the pistonphone, always
proceed very slowly and carefully, to avoid the possibility
of damage to the microphone diaphragm caused by abrupt
changes in air pressure.
Also, do not rotate the microphone or the pistonphone while
inserting. Otherwise the protective grid of the microphone
may become loose or detached, causing damage to the
microphone diaphragm.