BB106411.book : 2237-ch6 Black 3
Chapter 6 – Specifications
BB1064–11
6–3
2237 Controller
User Manual
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)
AC Output:
Short-circuit protected coaxial LEMO series 00
socket
Max. Output: 0.5V RMS corresponding to the top
of the selected measurement range ±3dB depend-
ing on the microphone’s sensitivity
Output Resistance: 100Ω
Output: Output signal from preamplifier (un-
weighted)
Clock:
Real-time (calendar) and measurement duration
Factory set to Central European Time
Start-up Time:
Less than 10 s
Effect of Magnetic Field
80A/m (1Ørsted) at 50 Hz gives <30 dB (A)
Fig.6.1 Response of the sound level meter to tone bursts of varying characteristics
110
0
–10
– 20
– 30
100
nominal
I
F
measured
Pulse length (ms) t
Reading in dB referred to continuous signal level (dB)
931682e
t
4 kHz
S
Calibration Conditions:
Reference Frequency: 1000Hz
Reference SPL: 94dB
Reference Temperature: 20°C (68°F)
Reference RH: 65%
Reference Range: 50– 130 dB (set automatically
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)
Effect of Humidity: <0.5dB for 30%<RH<90%
(at 40°C, 1kHz)
Vibration Sensitivity
<80dB at 1m/s
–2
horizontally
<85dB at 1m/s
–2
vertically
Batteries:
Four 1.5V 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.
Physical Characteristics:
Size: 257×97×41mm
Weight: 460g (incl. batteries)
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