GHM DeltaOHM HD2010UC, Руководство по эксплуатации

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HD2010UC
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V4.2
DESCRIPTION OF THE DIFFERENT INTEGRATION MODES
The 2010UC makes measurements according to two different acquisition modes either single
(standard for 2010UC) or multiple (“Advanced Data Logger” required) .
The single integration begins by resetting the integrated levels (e.g. the Leq) and ends when the set
integration time Tint is elapsed or when the acquisition is manually interrupted by the RUN/STOP
key. The following figure shows the Leq Short profile calculated twice per second and the integrat-
ed Leq over a measurement time of 1 minute in single mode.
In the measurement time span, the Leq Short (LAeqS) shows three phases with high noise,
about 80dB, and a variable 52-60dB background noise.
The Leq profile shows that the integration of the three high noise phases gives an equivalent level
stabilizing at about 77dB at the end.
It is often necessary, or convenient, to divide the measurement time in equal duration intervals and
calculate the integrated levels, as Leq, maximum and minimum levels, etc. on each interval sepa-
rately instead of on the entire measurement. The multiple integration mode serves this purpose.
The multiple integration divides the measurement in equal intervals according to the set in-
tegration time (Tint). Each single interval begins by resetting the levels and ends when the set inte-
gration time is elapsed; the integration levels sequence ends when manually interrupted by the
RUN/STOP key.
The following figure shows the Leq Short profile calculated twice per second, and the integrated
Leq over intervals of 20seconds during a measurement time of 1 minute in multiple mode.
The Leq Short profile is similar to that of the previous figure. The Leq Short profile shows the
multiple integration mode divided the measurement time three intervals of 20 seconds, each isolat-
ing the three noise phases. Some markers point out the beginning of each interval, when the Leq
was reset. Three equivalent levels at about 75dB are obtained, corresponding to each interval.
To select the integration mode select the proper parameter (MENU >> Instrument >> Measurement
>> Integration Mode) as
SING for single integration or MULT for multiple integration.
To perform the setting directly from the keyboard, press SELECT to choose the integration interval.
When the integration interval numeric value flashes, press RIGHT to set the
multiple integration
mode or LEFT to set the single integration mode. When the integration mode is set on MULT, the
“Tint” symbol flashes.