SLM Sound Level Meter,
S:1/1 Sound 1/1 Octave,
S:1/3 Sound 1/3 Octave,
S:FFT Sound FFT,
RT60 RT60,
TON Tonality
STI STIPA.
VLM Vibration Level Meter,
V:1/1 Vibration 1/1 Octave,
V:1/3 Vibration 1/3 Octave,
V:FFT Vibration FFT.
Note: It is not possible to change the measurement function during a measurement run. In this case,
the instrument displays for about 3 seconds the message: “Measurement in Progress”. To change
the function of the instrument the current measurement must be stopped!
Note: The 1/3 Octave, FFT, RT60 and STIPA functions are optional and should be unlocked by
entering the activation code in the text editor screen, which is opened after first attempt to select it.
Once unlocked, this option will be ready to use permanently.
Optional measurement functions that broaden the application of the instrument can be initially supplied and
activated by the manufacturer or purchased later and activated by the user.
3.3 CALIBRATING THE INSTRUMENT – CALIBRATION
The instrument is factory calibrated with the supplied microphone and
accelerometer for the reference environmental conditions. Because the
'accuracy' of the electronic components can drift so equipment should be
calibrated periodically by a competent laboratory. Because the sensitivity of
the microphone and accelerometer is a function of the temperature, ambient
pressure and humidity and when the absolute sound pressure level value is
important, the absolute calibration of the measurement channel should be
performed before the measurement. It is also good practice to check the
instrument measurement channel before and after measurements.
Due to implemented automatic calibration the instrument can perform the
sound calibration automatically, when the calibrator is placed over the
microphone (switched on or with the auto run function). The calibrator level
is automatically detected, and the calibration measurement is started
automatically. Just press <ENTER> to confirm the calibration results. A
sound measurement cannot be in progress while the automatic calibration is
being performed.
The Calibration list comprises positions
enabling in-situ system checking and
calibration (System Check, Calibr. by
Sensitivity, Calibr. by Measurement),
checking and erasing calibration records
(Calibration History, Clear Calibr. History),
switching on the automatic calibration
(Auto Calibration) as well as adding the
current calibration results to the data files
(Post Calibration).
Note: The calibration factor is always added to measurement results and measurement range limits
of the Level Meter, 1/1 Octave, 1/3 Octave and FFT functions.
Note: The calibration level and the calibration result are expressed in different units depending on the
settings of the instrument. The metric or non-metric Vibration units are set in the Vibration Units
screen (path: <Menu> / Auxiliary Setup / Vibration Units). Additionally, the linear or logarithmic units
are set in the Display Scale screen (path: <Menu> / Display / Display Scale).
Note: To check or calibrate the instrument, the current measurement in progress must be finished!
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