Svantek SV 200A User Manual

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SV 200A User Manual
Weighting filters (see C.3)
• Z meeting requirements of the IEC 61672-1:2013 standard for the Class 1 “Z“ filter
• A meeting requirements of the IEC 651 and IEC 61672-1:2013 standard for the Class 1 “A” filter
• C meeting requirements of the IEC 651 and IEC 61672-1:2013 standard for the Class 1 “C” filter
• B meeting requirements of the IEC 651 and IEC 61672-1:2013 standard for the Class 1 “B” filter
Table C.1.2. Self-generated noise for different weighting filters
Electrical *)
Acoustical compensated
Weighting filter
A
C
Z
A
C
Z
Noise
< 13 dB
< 14 dB
< 15 dB
< 15 dB
< 15 dB
< 20 dB
*) measured with the ST 02 microphone equivalent impedance 18 pF +/-10%
Special filters (see Section C.1)
Frequency response of SV 200A is compensated by means of two digital filters:
• Environmental compensation filter improving the complete instrument
frequency response in the free field for the reference
acoustic wave incidence angle 90 deg
• Airport compensation filter improving the complete instrument
frequency response in the free field for the reference
acoustic wave incidence angle 0 deg
RMS detector
• Digital “True RMS“ with Peak detection,
• Resolution 0.1 dB
• Range 327.7 dB
• Crest Factor unlimited (for signals in 20 kHz band).
Overload detector
The instrument has the built-in overload detectors. The overload in the measurement channel (in its
analogue part) and the overload of the analogue / digital converter are both detected. The “overload”
indication is when the input signal amplitude is 0.5 dB above the declared “Peak measurement range”.
Underrange detector
The instrument has the built-in underrange detector. The “underrange” indication appears when the
minimum value of the RMS detector output goes below the specified lower linear operating range.
Time weighting characteristics (Exponential averaging)
Slow “S“ according to IEC 61672-1:2013 Class 1, Equivalent Time Constant 1000 ms
Fast “F” according to IEC 61672-1:2013 Class 1, Equivalent Time Constant 125 ms
Impulse “I” according to IEC 60804:2000 Class 1, Equivalent Time Constant 35 ms, Hold Time
1500 s
Reference conditions
• Class of the acoustic field Free field
• Reference acoustic pressure 114.0 dB (related to 20 Pa)

Svantek SV 200A Specifications

General

Brand	Svantek
Model	SV 200A
Category	Measuring Instruments
Language	English