Chapter 6 – Specifications
Specifications
BB 1219 – 11
59
Integrating Sound Level Meter Type 2239 A
User Manual
AC OUTPUT
Short-circuit protected coaxial LEMO se-
ries 00 socket
Max. Output: 0.5 V RMS corresponding to
the top of the selected measurement
range ±3 dB depending on the micro-
phone’s sensitivity
Output Impedance: 100 Ω
Output: Output signal from preamplifier
(unweighted)
CLOCK
Real-time (calendar) and measurement
duration
Factory set to Central European Time
START-UP TIME
Less than 10 s
EFFECT OF MAGNETIC FIELD
80 A/m (1ørsted) at 50 Hz gives <30 dB (A)
CALIBRATION CONDITIONS
Reference Frequency: 1000 Hz
Reference SPL: 94 dB
Reference Temperature: 20°C (68°F)
Reference RH: 65%
Reference Range: 50 – 120 dB (set auto-
matically during calibration sequence)
Reference Direction of Incidence: Frontal
ENVIRONMENTAL EFFECTS
Storage Temperature: –25 to +60°C (–13
to +140°F)
Operating Temperature: –10 to +50°C (14
to 122°F)
Effect of Temperature: <0.5dB (–10 to
+50°C) (14 to 122°F)
Effect of Humidity: <0.5 dB for
30%<RH<90% (at 40°C (104°F)
EMC
Classification Group: X
Reference Direction for Testing Radio Fre-
quency Susceptibility: Microphone facing
antenna
EMC IMMUNITY
Maximum sensitivity is achieved with In-
terface Cable AO 1422 and Output Cable
AO 0403
EMC EMISSION
For all settings and configurations, the
emission is much lower than specified by
IEC 60651 Amendment 2 (2000), Draft
IEC 61672
VIBRATION SENSITIVITY
<80 dB at 1 m/s
2
horizontally
<85 dB at 1 m/s
2
vertically
BATTERIES
Four 1.5 V LR6/AA size alkaline cells
Lifetime (at room temperature): Typically
>12h
Internal back-up battery:
Keeps clock and memories operating for
at least 6months (typically) if fully
charged. Fully charged in about 24 hours
when main batteries are inserted
PHYSICAL CHARACTERISTICS
Size: 257×97×41 mm (10.1×3.8×1.6 in)
Weight: 460 g (incl. batteries) (1.0 lb)
bb221911.book Page 59 Tuesday, July 24, 2001 11:23 AM
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