Keterangan :

Fungsi :

Untuk mengkalibrasi alat monitoring kebisingan. Kalibrasi dilakukan di lapangan sebelum pengukuran dan sesudah pengukuran dilakukan.

Technical Specifications :
Standars :
Standars :
ANSI SI .40-1984 and IEC 942: 1988 Class 1
Output Prequency :
QC-10: 1000 Hz
QC-20: selectable, 250 Hz+ / -2%
Output Amplitude :
QC-10: 114 dB
QC-20: Selectable, 94 dB or 114 dB
Output Accuracy :
+ / - 0.3dB @ 20 ° C 760 mmHg.
Distortion :
Less than 1% within temperature and humidity operating ranges.
Electrial Output :
1 volt RMS sine wave, + / -5% ( 0.4dB) .
Output impedance :
1000 ohms.
Phone jack :
( 1/ 8 " ) compatible with Switchcraft 780 plug or equivalent.
Temperature :
Operating range -10 to + 50 ° C.
1 KHz: within + / -0.3dB from + 5 to 50 ° C.
Below + 5 ° C coefficient of SPL is 0.0 to + 0.01 dB/ C ref.20 ° C
250Hz: within + / -0.3dB from + 5 to 40 ° C.
Below + 5 ° C coefficient of SPL is 0 To 0.02dB/ ° C max ref.20 ° C
Storage temperature -40 to + 65 ° C with battery removed.

Coupler Volume Coefficient :
A 1cc increasa in coupler volume will result in a typical decrease in output of .27dB @ 1kHz and .67dB @ 250 Hz.
Humidity :
Relative humidity 5 to 95% with less than 0.1dB change in output.
Effects due to external field :
60 Hz: No measurable effect up to 5 Oersted ( 1 Oe = 80A/ m)
400 Hz: No measurable effect up to 2 Oersted
( Stated field strengths are magnetic test chamber limits )
Tested for RF susceptibility with no effect at field strengths to 65 V/ m over the
frequency range of 10MHz to 500MHz.
Power :
Battery operated, 9 volt transistor battery, NEDA 1604 type.Projected battery life
greater than 25 operating hours with intermittent use. Battery life is affected by
temperature. Consult battery manufacturers data for specific battery life at a
current draw of 10mA.
Size and Weight :
4.1 " ( 10.4 cm) long, 2.4 " ( 6 cm) dia., 12 oz ( 0.35 kg) .