The following appendix effects for firmware version 1.11.1 or greater.
C.1.1 Specification of SVAN 971 as SLM in the standard configuration
The SVAN 971 instrument working as the SLM meets requirements of the IEC 61672:2013 for the Class 1
instruments.
The configuration of the complete SLM and its normal mode of operation
SVAN 971 sound analyzer
SV 18 microphone preamplifier
A.C.O. 7052E measuring prepolarized free-field microphone (1/2", nominal
sensitivity 35 mV/Pa, polarization 0 V)
SV 35A acoustic calibrator, B&K 4231 (or equivalent)
Accessories included in SVAN 971 instrument set
SC 156 USB 2.0 cable
SA 22 windscreen
Accessories available
SV 75 RS 232 interface for SVAN 971 instrument series
SA 271 outdoor protection unit
Measured quantities
The measured quantities for SLM mode are: Lpeak, SPL, Lmax, Lmin, Leq, RLeq, SEL, Ltm5, Lden, LEPd,
Lnn. The definitions for above mentioned parameters are given in Appendix D.
Additional functions
Overload indication see Chapter 3 or Appendix A.
Under-range indication see Chapter 3 or Appendix A
Battery state indication see Chapter 3
High self-vibration warning see Chapter 3
Conformance testing
This chapter contains the information needed to conduct conformance testing according to the specified
standards.
Mounting for acoustical tests The microphone must be mounted on the preamplifier.
Electrical substitute for the microphone To obtain a BNC Class electrical input, the microphone
must be replaced by an electrical microphone impedance
ST 02 with the serial capacitance 18 pF ± 10%.
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