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Chapter 4
Specifications
4.1 Specifications
Unless specifically noted otherwise, specifications are given as typical data under Reference
Environmental Conditions.
4.2 Standards
Type 2240 conforms to the following International Standards and Classes/Types/Groups:
• IEC 60651 (1979) plus Amendment 1 (1993 – 02) and Amendment 2 (2000 – 10), Type 1, Group X
• IEC 60804 (2000 – 10), Type 1, Group X
• IEC 61672 - 1 (2002 – 05), Class 1, Group X
• DIN 45657 (1997 – 07)
• ANSI S1.4 – 1983 (R 1997) Type S1
• ANSI S1.43 – 1997, Type 1
In the text elsewhere in this manual, references to these standards are shortened to the standard’s name
but are to be understood as the full text above.
The International IEC Standards are adopted as European standards by CENELEC. When this happens,
the letters IEC are replaced with EN and the number is retained. Type 2240 also conforms to these EN
Standards.
4.3 Reference Environmental Conditions
Air Temperature: 23°C
Static Pressure: 101.325 kPa
Relative Humidity: 50%
4.4 Reference Conditions for Acoustic Calibration
Reference Range: 60 – 140 dB
Reference Sound Pressure Level: 94.00 dB re 20 μPa
Reference Frequency: 1 kHz
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