BRUEL & KJAER 2240 Guia Del Usuario página 39

Elapsed Time Display: from 00 m 00 s up to 60 m 00 s
SETTLING TIME
Less than 5 s
REFERENCE CONDITIONS
Reference Frequency: 1000 Hz
Reference Sound Pressure Level: 94 dB
Reference Temperature: 20
Reference RH: 65%
Reference Range: 60 – 140 dB
Reference Direction of Incidence: Frontal
ENVIRONMENTAL EFFECTS
Storage Temperature: –25 to 60
Operating Temperature: –10 to 50
Effect of Magnetic Field: 80 A/m (1 oersted) at 50 Hz
gives less than 30 dB (A-weighted)
BATTERIES
Two 1.5 V LR 6/AA-size alkaline batteries
Power Consumption During Normal Operation:
Less than 300 mW
Fig.7.1 Relative response of 'A' and 'C' frequency weightings
Note: This chapter comprises the specifications that are needed for evaluation of instrument performance
characteristics and proper use of the instrument. Some of the applicable sound level meter standards require
additional technical documentation, in particular for pattern evaluation (type approval) purposes, but have no
bearing on normal use. The additional technical documentation is given in a separate Brüel & Kjær instruction
manual (BE 1694). For a copy, contact your local Brüel & Kjær representative.
° °
C (68 F)
° °
C (–13 to 140 F)
° °
C (14 to 122 F)
Relative Response
(dB)
2
0
C
– 5
– 10
– 15
5 10 20 50 100 200
Frequency (Hz)
Lifetime (at room temperature): Approximately 16 h
PHYSICAL CHARACTERISTICS
Dimensions: 230 × 78 × 31 mm including microphone
Weight: 245 g (8.64 oz) including batteries
ORDERING INFORMATION
Type 2240 Integrating-averaging Sound Level Meter
Type 2240 A Integrating-averaging Sound Level Meter
plus Type 4231 Sound Level Calibrator
Included Accessories:
• Type 4188 Prepolarized Free-field 1/2
Microphone
• DZ 9566 Random-incidence Corrector
• KE 0443 Pouch
• UA 1236 Protective Cover
• QA 0229 Screwdriver
• Two alkaline batteries
Optional Accessories:
• Type 4231 Sound Level Calibrator (included with
Type 2240 A)
A
C
500 1k 2k 5k 10k 20k
980385/1
PART 1
English
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