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STANDARDS
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Conforms with the following:
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o IEC 60651 Type 1, 1979 & Amendment 1 1993 & Amendment 2 2000
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o IEC/EN 61672 – Draft March 1998 Class 1
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o EN60651 Type 1
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o EN60804 Type 1
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o ANSI S1.4 –1983 Type S1
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o ANSI S1.43 – 1997 Type 1
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SUPPLIED MICROPHONE
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Type 4188 Prepolarized Free-field 1/2" Condenser Microphone
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Nominal Sensitivity: –30 dB re 1 V/Pa or 31.6 mV/Pa
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Frequency Range: 8Hz–16 kHz }2dB
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Capacitance: 12 pF
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MICROPHONE PREAMPLIFIER
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ZC 0030
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Extension Cables: Available in lengths of 3m and 10 m. No recalibration is required
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MEASURING RANGES
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Dynamic Range: 80 dB, adjustable to give full-scale readings from 80 to 140 dB in 10 dB steps
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Max. Peak Level: 3 dB above full scale reading
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Upper Limit (RMS) for Crest Factor = 10: 17 dB below full scale reading
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Pulse Range: 83 dB
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Linear operating ranges (broadband):
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For the individual level ranges, at 1 kHz, the nominal upper boundary level minus the lowest sound pressure level measurable with a noise margin of 5 dB.
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DISPLAY
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128 pixel × 64 pixel dot matrix display with backlight
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AUTO-START
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Mediator supports a total of four timers which allow setup of measurement start times up to a month in advance
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CALIBRATION
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Semi-automatic, using Sound Level Calibrator Type 4231 or Multifunction Acoustic Calibrator Type 4226.
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The initial factory calibration (sensitivity and microphone serial number) is stored for comparison with later calibrations. When using the supplied microphone the maximum allowed deviation from the initial sensitivity is }1.5 dB. An unspecified microphone can be chosen during calibration, in which case calibration can be made with practically any sensitivity.
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Stored Calibration History: 20 latest calibrations plus initial calibration
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MEMORY
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2Mbytes. Up to 511 measurements can be stored by each loaded software module, including time stamp, complete setup and calibration data
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SERIAL PRINTER
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Measurement data can be printed on Portable Printer Type 2322 or on an IBM® Proprinter-compatible printer
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CLOCK
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Real-time (calendar)
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SERIAL INTERFACE
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Conforms to EIA/TIA 574 (RS–232), coupled as Data Terminal
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Equipment (DTE). Cable (AO 1442) is included
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Connector: 9–pin D-type male
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Baud Rates: 4800, 9600, 19200, 38400 and 115200
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Word Length: 8 bits, no parity, 1 stop bit
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Handshake: Hardwired, modem
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SETTLING TIME
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From Power On: <10 s
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ENVIRONMENTAL EFFECTS
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Storage Temperature: –25 to +70°C (–13 to + 158°F)
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Operating Temperature: –10 to +50°C (14 to 122°F)
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Effect of Temperature: < 0.5 dB (–10 to +50°C)
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Effect of Humidity: < 0.5 dB for 30%< RH< 90% (at 40°C, 1kHz)
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BATTERIES
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Four 1.5V LR6/AA alkaline cells
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Lifetime (at room temperature): Typically > 10 h (with filter set selected typically > 7 h)
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EXTERNAL DC POWER SUPPLY
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Voltage: Regulated 7 to 15 V
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Power: Approximately 150mA at 7V (approximately 210mA with filter set selected)
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WEIGHT AND DIMENSIONS
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460 g (1 lb 2 oz) (with batteries), 257 × 97 × 41mm
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LANGUAGE
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Each instrument is loaded with English, German, French, Italian and Spanish text. You can select one of these languages at any time
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