STANDARDS

Conforms with the following:

o IEC 60651 Type 1, 1979 & Amendment 1 1993 & Amendment 2 2000

o IEC/EN 61672 – Draft March 1998 Class 1

o EN60651 Type 1

o EN60804 Type 1

o ANSI S1.4 –1983 Type S1

o ANSI S1.43 – 1997 Type 1

SUPPLIED MICROPHONE

Type 4188 Prepolarized Free-field 1/2"" Condenser Microphone

Nominal Sensitivity: –30 dB re 1 V/Pa or 31.6 mV/Pa

Frequency Range: 8Hz–16 kHz }2dB

Capacitance: 12 pF

MICROPHONE PREAMPLIFIER

ZC 0030

Extension Cables: Available in lengths of 3m and 10 m. No recalibration is required

MEASURING RANGES

Dynamic Range: 80 dB, adjustable to give full-scale readings from 80 to 140 dB in 10 dB steps

Max. Peak Level: 3 dB above full scale reading

Upper Limit (RMS) for Crest Factor = 10: 17 dB below full scale reading

Pulse Range: 83 dB

Linear operating ranges (broadband):

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.

DISPLAY

128 pixel × 64 pixel dot matrix display with backlight

AUTO-START

Mediator supports a total of four timers which allow setup of measurement start times up to a month in advance

CALIBRATION

Semi-automatic, using Sound Level Calibrator Type 4231 or Multifunction Acoustic Calibrator Type 4226.

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.

Stored Calibration History: 20 latest calibrations plus initial calibration

MEMORY

2Mbytes. Up to 511 measurements can be stored by each loaded software module, including time stamp, complete setup and calibration data

SERIAL PRINTER

Measurement data can be printed on Portable Printer Type 2322 or on an IBM® Proprinter-compatible printer

CLOCK

Real-time (calendar)

SERIAL INTERFACE

Conforms to EIA/TIA 574 (RS–232), coupled as Data Terminal

Equipment (DTE). Cable (AO 1442) is included

Connector: 9–pin D-type male

Baud Rates: 4800, 9600, 19200, 38400 and 115200

Word Length: 8 bits, no parity, 1 stop bit

Handshake: Hardwired, modem

SETTLING TIME

From Power On: <10 s

ENVIRONMENTAL EFFECTS

Storage Temperature: –25 to +70°C (–13 to + 158°F)

Operating Temperature: –10 to +50°C (14 to 122°F)

Effect of Temperature: < 0.5 dB (–10 to +50°C)

Effect of Humidity: < 0.5 dB for 30%< RH< 90% (at 40°C, 1kHz)

BATTERIES

Four 1.5V LR6/AA alkaline cells

Lifetime (at room temperature): Typically > 10 h (with filter set selected typically > 7 h)

EXTERNAL DC POWER SUPPLY

Voltage: Regulated 7 to 15 V

Power: Approximately 150mA at 7V (approximately 210mA with filter set selected)

WEIGHT AND DIMENSIONS

460 g (1 lb 2 oz) (with batteries), 257 × 97 × 41mm

LANGUAGE

Each instrument is loaded with English, German, French, Italian and Spanish text. You can select one of these languages at any time