Svantek SVAN 979, Руководство пользователя

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SVAN 979 User Manual
During the Integration Period , the instrument performs series of 1-second measurements/integrations, and
every second averages 1-second results with the results averaged for n-1 seconds. These averaged results
are displayed and renewed every second for the elapsed measurement time (n seconds). In the end of the
Integration Period the averaged measurement results are saved in the logger file providing that such saving
is enabled.
The measurement will stop automatically after this period and start again if the number of Repetition Cycles
is greater than one.
The definitions of the measurement results in which the integration period is used are given in Appendix D.
To set the integration period you should define the required hours, minutes and
seconds fields.
▪
The appropriate field may be selected with the
◄ / ► key.
▪
Value of hour, minute and second is changing with the
▲ / ▼
key.
The time passed from the measurement start is displayed in the right upper
corner of the measurement screen in the format
mm:ss in the range from
00:00 to 59:59, or in the format hh: mm:ss in the range from 01:00:00 to
99:59:59, or in the format xxxh from 100h to 999h, and >999h if the elapsed
time exceeds 999 hours. Its maximum value is equal to the Integration Period
and the elapsed time is zeroed when the new measurement cycle starts.
Number of measurement repetitions
The Repetition Cycles parameter defines the number of measurements (with
the measurement period defined by the Integration Period ) to be performed by
the instrument after the <Start> keystroke. The Repetition Cycles number
values are within the limits [Inf, 1÷1000].
This enables to make a series of measurements without pressing the <Start>
key and save this series in the file.
For example, if the Integration Period is equal to 8 hours and the Repetition Cycles is equal to 2, the
instrument performs first integration for the 8-hour period from the measurement start and second integration
for the 8-hour period from the end of the first integration. At the end of each cycle the 8 hours LEQ will be saved
in the file.
Note: In case of an infinite integration period or infinite repetition cycles the measurement should
be stopped with the <Stop> key
.
Detector type
The RMS Integration parameter defines the detector type for the integration of
the RMS based results. Two options are available: linear ( Lin ) and exponential
( Exp ). The formulae used for the Leq calculation are given in Appendix D.
For sound measurements, Leq , SEL , LEPd , L(den) results can be calculated
with both detectors, and Lmax , Lmin , Spl , Ltm3 , LTeq results
– only with the
exponential detector.
For vibration measurements, RMS result can be calculated with both detectors,
and Max results
– only with the exponential detector.