Svantek SV 971A, Руководство пользователя

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SV 971A User Manual
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Delay of measurement start
The Start Delay parameter defines the delay period from the <Start/Stop>
keystroke to the real start of the measurement (digital filters of the instrument
constantly analyse the input signal even when the measurement is stopped). This
delay period can be set from
0 second to 60 minutes . Its value by default is set
to 1s .
Note: In the Simple interface mode, the Start Delay parameter is hidden, but the instrument
will use settings previously defined in the Advanced mode or default settings (1s)
.
Note: The minimum delay period is equal to 0 second. In the Calibration mode, the delay
period is always equal to 3 seconds.
Note: After turning on, the instrument requires 30 seconds to warm up. If you press the
<Start/Stop> key earlier, the instrument will start a measurement not earlier than after 30
seconds.
Synchronisation of measurement cycles
The Start Sync.
parameter defines synchronisation points with the instrument’s
RTC. The Start Sync. parameter can be set as: Off , 1m , 15m , 30m and 1h . For
example, if 1h is selected, the measurement will start from the beginning of the
first second of next hour after the <Start> keystroke, and then will be repeated
also from the first second of the following hour after elapsing the integration
period if the number of cycles is greater than one. The default value is set to
Off .
Integration period
The Integr. Per parameter defines the period during which the signal is being
measured (and for some results averaged/integrated) and measurement results
are logged in the logger file as
Summary Results (see description of the
Logger Setup ). The integration period can be infinite ( Inf ) or selected from the
set: 24h , 8h , 1h , 15m , 5m , 1m , from 1s to 59s with 1s step, from 1m to 59m with
1m step, from 1h to 24h with 1h step.
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 the 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 switched on.
The measurement will stop automatically after this period and start again if the number of measurement
repetitions (
Rep. Cycles ) is greater than one.
The definitions of the measurement results in which the integration period is used are given in
Appendix D.
Number of measurement cycles
The Rep. Cycles parameter defines the number of measurements (with the
measurement period defined by the Integr. Per parameter) to be performed by
the instrument after the <Start> keystroke. The Rep. Cycles number values are
within the limits [Inf, 1÷1000]. Its value by default is set to
1 .
For example, if Integr. Period is equal to 8 hours and Rep. 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
logger file.
Note: In the Simple interface mode, the Rep. Cycles parameter is hidden, but the instrument
will use settings previously defined in the Advanced mode or default settings (1)
.