Chapter 6 – Specifications
Specifications
58
Brüel & KjærIntegrating Sound Level Meter Type 2239 A
User Manual
6.1 Specifications
STANDARDS
Conforms with the following:
• IEC 60651 Type 1 (1979) and amend-
ment 1 (1993) and Amendment 2 (2000)
• IEC 60804 Type 1 (2000)
• IEC/EN 61672 – Draft July 2000 Class 1
• EN 60651 Type 1 and Amendment 1
(2000)
• EN 60804 Type 1 and Amendment 1
(2000)
• ANSI S1.4 –1983 Type S1
• ANSI S1.43 – 1997 Type 1
MEASURING RANGES
NOISE FLOOR
Below measurement range – less than
30 dB
DETECTORS
Simultaneous RMS and Peak with inde-
pendent frequency weightings
Linearity Range: 70 dB
Pulse Range: 73 dB
Non-linear Distortion: Too small to affect
accuracy
Peak Detector Rise Time: < 100 µs
FREQUENCY WEIGHTINGS
RMS: A and C
Peak: C
TIME WEIGHTINGS
Fast, Slow, and Impulse (F, S, I)
DISPLAY
4 line LCD showing:
• Input signal level – indicated with a
quasi-analog bar (updated 15 times per
second)
• Selected parameters with level
• Warnings for: battery low and overload
• Measuring range
• Time weighting setting
• Elapsed measurement time
• Menus for displaying and editing set-
tings
• Recalled records
Features a back-light for easy viewing,
which can be turned on and off and in-
cludes an auto time-out to save batteries.
Displayed parameters updated once per
second.
PARAMETERS
Type s : L
eq
(L
Im
), MaxP, Peak, MaxL, MinL,
SPL, Inst
Resolution: 0.1 dB
EXCHANGE RATE
3dB
MEMORY
40 Records of measurement results
MICROPHONE
Type 4188 Prepolarized Free-field 1/2″
Condenser Microphone
Sensitivity: –30 dB re 1 V/Pa ±2dB
Frequency Range: 8 Hz to 16 kHz ±2dB
Capacitance: 12 pF
SERIAL INTERFACE
Compatible with:
EIA–574
EIA–232–E with 25-pole adaptor
Baud Rate: 9600
Data Bits: 8
Stop Bit: 1
Parity: None
Handshake: XON/XOFF
Result Output Formats:
Buffer (printer format) or all records
(spreadsheet format)
Range (dB) Max. Peak
level (dB)
Upper Limit (RMS) for Signals
with Crest Factor 10 (dB)
30 – 100 103 83
50 – 120 123 103
70 – 140 143 123
bb221911.book Page 58 Tuesday, July 24, 2001 11:23 AM
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