Máy đo mức độ ồn thấp Larson Davis SoundAdvisor™ 831C-LOWN

831C-LOWN SPECIFICATIONS

Calibration

Requires 94 dB re 20 μPa calibrator such as CAL200

Self-generated Noise (typical)

Weighting

0 dB Gain

A

5.5 dB

C

10 dB

Z

18 dB

Alkaline Battery Life

Decreased approx 15% when using 378A04

831C-LOWN Included Items

831C

Model 831C Sound Level Meter

831C-ACC

Accessory kit for Model 831C

ADP074

Adapter for ICP® input (BNC)

378A04

Low noise ICP® microphone and preamplifier

012A10

BNC cable, 10 ft (3 m)

BNC M-M

BNC male to male connector

ADP032

Adapter to mount ½ inch preamplifier to tripod (1/4-20 thread)

Ordering Information

831C-LOWN

Low noise system including Model 831C, 378A04 low noise microphone & preamplifier and accessories

Optional Accessories

CAL200

Class 1 acoustic calibrator, 94 or 114 dB at 1 kHz (The 378A04 must be calibrated at 94dB)

PRM831-FF

PRM831 preamplifier with free field microphone (377B02)

PRM831-RI

PRM831 preamplifier with random microphone (377B20)

TRP001

Tripod with ADP032 for mounting ½ inch preamplifier

Software

SWW-DNA

Software and USB dongle for evaluation and reporting

SWW-DNA-831

Instrument driver for SWW-DNA to provide control, live display, and data translation from Model 831

378A04 SPECIFICATIONS

Acoustic

Sensitivity

450 mV/Pa
-7 (±2 dB) re 1 V/Pa

Frequency Range

10 to 16,000 Hz

Inherent Noise

< 6.5 (5.5 typical) dB re 20 μPa

3% Distortion Limit

Level (dB re 20 μPa)

Frequency

100 dB

< 5 kHz

80 dB

> 5 kHz

Environmental

Operating Temperature

14 °F to 176 °F (- 10 °C to 80 °C)

Operating Humidity

0 to 99% relative humidity, non-condensing

Electrical

Polarization

0 V

Output Voltage

± 2 V peak maximum

ICP constant current

4 to 20 mA (4 mA supplied by Model 831C)

Physical

Diameter with Grid

0.52 in (13.2 mm)

Height with Grid

4.02 in (102.1 mm)

Equalization Vent

Rear

Weight

1.8 oz (51.3 grams)

Maximum Sound Pressure

130 dB re 20 μPa peak

Mechanical

Grid cap and microphone not removable