Information for conformance testing.
Reference Sound Pressure Level:
114.0 dB re 20 μPa.
The reference frequency is 1000 Hz.
Reference Level Range:
The instrument has one level range only.
Microphone type: Nor1225
Preamplifier: Nor1209
Microphone Reference Point and Direction:
The microphone reference point is the geometric centre of the diaphragm of the microphone. The microphone
reference direction is from the microphone and along the axis of rotational symmetry for the microphone and
preamplifier.
Sound calibrator: Nor1251 or Nor1255.
Battery voltage:
The instrument will automatically switch off if the battery or external voltage is too low for operation
within the stated specifications.
Electromagnetic Compatibility:
When the instrument is tested for conformance to electromagnetic compatibility requirements, the instrument should be
in the measurement mode, as this normally will generate the highest levels of emissions. The highest susceptibility
is normally observed when the display faces the principal direction of propagation for the electromagnetic field.
For further information related to type approval periodic verification, consult the factory.