27
If you select WBCombined filter, Quantity value become initialize to RMS value.
2. 1. 2
Filter selection of sound level meter
A window is opened to press
button like [Fig. IV-2-2]. You can see 2 type filters.
- 1Hz Highpass Filter
- 20Hz Highpass Filter
[Fig. IV-2-2] Parameter Selection Window in Sound Level Meter
2. 2 Integration Time
This parameter is the
T
of <Eq. IV-1-1> and <Eq. IV-1-2> and means the measuring time or the
observation time. The calculated values are saved to file at every integration time. If you select stop
check box in [Fig. IV-2-4] and
[Fig. IV-2-5], RealWave will stop measuring in the integration time.
Also if you select [Timer] in the [Recording Options] and [Stop] in the integration time
simultaneously, the system will stop at a short time. For example, if the timer is set by 10sec and the
integration time is set 2sec without stopping function, the system will save the 5 data at every 2sec
and stop after 10sec.
[Fig. IV-2-3] Timer Setting
[Fig. IV-2-4] VLM Integration Time Setting
Содержание SLA-PA201
Страница 64: ...64 Appendix 1 The Theory for calculating RMS by ISO2631 and ISO8041 ...
Страница 67: ...67 Appendix 2 Frequency Response of Filter in the Vibration Level Meter ...
Страница 75: ...75 Appendix 3 Theory of WBCombined Filter and Frequency Response ISO6954 Filter ...
Страница 79: ...79 Fig 2 Lowpass Filter with 100Hz Cutoff Fig 3 a v transition Frequency Response ...
Страница 88: ...88 Fig 12 Error between theoretical value and measured value ...
