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Technical Specification
The individual characteristic applies to each instrument unless specifically
worded otherwise.
Instrument Standards:
IEC 61672-1 : 2002 Class 1 Group X
IEC 60651 : 1979 Type 1 + A1:1993 + A2:2000 Group X
BS EN 60651 : 1994 Type 1 Group X
IEC 60804 : 2000 Type 1 Group X
BS EN 60804 : 2001 Type 1 Group X
IEC 61252 : 1993
BS EN 61252 : 1993 + A1:2000
Measurement Parameters:
Lp, Leq, Lmax, Pmax, LE, Pa
2
h, Lex, Projected Lex, DOSE%, Projected DOSE%,
Dose Per Hour, Elapsed time
Peak Frequency Weighting:
C weighting to IEC 61672-1 Class 1
Time Weightings:
SLOW and FAST according to IEC 61672-1 Class 1, IEC 60651 Type 1
RMS Frequency Weighting:
A and C weightings according to IEC 61672-1 Class 2, IEC60651 Type 2
Level Ranges (dB) for A & C Weighting:
Linear Operating Range, IEC 61672-1:2002
31.5Hz
1kHz
4kHz
8kHz
41.0 – 60.6
41.0 – 100.0
41.0 – 100.0
41.0 – 99.0
55.0 – 80.6
55.0 – 100.0
55.0 – 100.0
55.0 – 119.0
75.0 – 100.6
75.0 – 140.0
75.0 – 140.0
75.0 – 139.0
