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