Instruction Manual

Sound Level Meter Types 2245 – Instruction Manual Page 57 of 110
4.9.3 Primary Indicator Range
Primary Indicator Range according to the International Standard IEC 60651:
Table 4.4 Primary Indicator Range
4.9.4 Indicator Range
Indicator Range according to the international standard IEC 60804:
Table 4.5 Indicator Range
Please note: For Sound Exposure Levels, the stated ranges are valid if 10*lg(Δ t ) is added
to the limits. Δ t being the averaging time interval, indicated as Elapsed
Time , expressed in seconds.
4.9.5 Linearity Range
Linearity Range according to the international standard IEC 60804 is the difference
between the Upper and Lower Limit in the following table:
Table 4.6 Linearity Range
Please note: For Sound Exposure Levels, the stated ranges are valid if 10*lg(Δ t ) is added
to the limits. Δ t being the averaging time interval, indicated as Elapsed
Time , expressed in seconds.
A-weighting
(dB)
B-weighting
(dB)
C-weighting
(dB)
Z-weighting
(dB)
123.6 21.4 21.1 23.6 30.3
Upper
Limit
(dB)
Lower Limit
A-weighting
(dB)
B-weighting
(dB)
C-weighting
(dB)
Z-weighting
(dB)
140.6 21.4 21.1 23.6 30.3
Upper
Limit
(dB)
Lower Limit
A-weighting
(dB)
B-weighting
(dB)
C-weighting
(dB)
Z-weighting
(dB)
142.1 19.3 19.0 21.5 28.2
Upper
Limit
(dB)
Lower Limit