Svantek Shawcity SVAN 977C, User Manual

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SVAN 977C User Manual
Rolling Time Time frame for the "Rolling Leq" calculation. The Rolling
Leq is presented as LR+<time frame>. For example, if
the
Rolling Time is equal to 30 minutes, the appropriate
result will be named as LR30 and calculated each
second as Leq integrated during last 30 minutes.
Chapter
4.1
Profiles Virtual broadband level meters, which calculate the set
of results with own weighting filter (
Filter ) and exponential
detector time constant ( Detector ).
Chapter
4.3
Filter Weighting filter applied in the profile in accordance with
most applicable world standards:
- for sound measurements: Z, A, C, B, U, AU, LF,
- for vibration measurements:
o
acceleration: HP, HP1, HP3, HP10, Wh,
o
velocity: Vel1, Vel3, Vel10 and VelMF,
o
displacement: Dil1, Dil3 and Dil10.
Chapter
4.3
Appendix C
Appendix D
Detector Exponential RMS detector time constant applied in the
profile:
-
Impulse , Fast or Slow for sound results like Leq, Lmax,
Lmin, SEL, LEPd, Lden, Spl, Ltm3 and LTeq ;
- from 100ms to 10s for vibration results like RMS, MAX .
Chapter
4.3
Appendix D
D.1.2
Compensation Digital filter that compensates some effect: Microphone ,
Free Field , Diffuse Field, Outdoor Environment,
Outdoor Airport and Windscreen .
Chapter
4.5
Microphone Digital filter that compensates the microphone inner
noise. It is switched on by default, however it is possible
to switch it off for electrical measurements (e.g.
laboratory calibration measurements). Chapter
4.5
Free Field This option should be selected for sound measurements
in the free field conditions. The microphone supplied with
SVAN 977C is designed for sound measurements in the
free field conditions. Chapter
4.5
Diffuse Field Digital filter that compensates the diffuse field effect. Chapter
4.5
Outdoor
Environment Digital filter that compensates the effect of the SA 277C
outdoor microphone kit in the free field for the reference
acoustic wave incidence angle 90 deg. Chapter
4.5