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SVAN 971 User Manual
– Appendixes
143
APPENDIX C. TECHNICAL SPECIFICATIONS
C.1
S
PECIFICATION OF
SVAN 971
AS SOUND LEVEL METER
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%.
Note: For the conformance electrical tests the Microphone Compensation must be set to the
“OFF”! (path: MENU / Measurement / Compensation Filter).
Note: For the conformance acoustical tests the Microphone Compensation must be set to the
“On”! (path: MENU / Measurement / Compensation Filter).
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