Cirrus Optimus+, Instrument Handbook

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Page 28
Sound Level Meters – User Manual
The displayed values will differ depending upon the language selection chosen for the
instrument.
5.1.11 Vehicle noise view
The vehicle noise view and optional wired remote is designed to meet the requirements of ISO
5130-1982 & §29 StVZO for the noise testing of motor vehicles, suitable for use in workshops,
garages and laboratories.
Each time the remote button is pressed an LAFMax value is taken, and the last three
measurements are averaged and displayed.
Please note that the instrument should be configured to display Fast time weighting.
5.2 High-level noise measurement
The GPS sound level meters can be used to measure high noise levels (up to 170 dB)
with the use of the optional MV:200EH high level noise measurement option.
This consists of a microphone capsule, attenuator, and preamplifier, supplied as a complete unit.
Switch off the instrument before fitting the MV:200EH.
Once the unit is fitted, calibrate the sound level meter as standard. The instrument will detect
the MV:200EH and adjust the measurement span to 50-170 dB.
If the standard microphone and preamplifier are replaced, re-calibrate the instrument to return
the measurement span to the standard 20-140 dB range.