Sound Level Meter Model 831 Larson Davis

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18 / 08 / 2020

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PALLSCIENTIFIC,
adalah perusahaan swasta nasional yang bergerak di bidang Hygiene Industri dan Kesehatan Lingkungan. Bertujuan untuk menjembatani dan memenuhi kebutuhan dunia industri khususnya dan masyarakat pada umumnya. perusahaan yang bergerak di bidang perdagangan barang dan jasa dengan meng-khususkan lingkup usaha perusahaan dalam bidang pengadaan peralatan hygiene industri dan kesehatan lingkungan, Peralatan Laboratorium, alat-alat kesehatan, serta penyediaan jasa pemantauan, pengukuran lingkungan dan perbaikan peralatan.

PERDAGANGAN BARANG.
Produk yang diperdagangkan perusahan utamanya adalah produk produk yang berkaitan dengan hygiene industri, kesehatan lingkungan, kesehatan & keselamatan kerja dan Peralatan laboratorium dan alat alat kesehatan . Produk produk tersebut antara lain :

A. Peralatan Pemantau Hygiene Industri dan Keselamatan Kerja Peralatan pemantau higiene industri dan keselamatan kerja meliputi :

Alat ukur suara ( Sound Level Meter & Noise Dosimeter)

Alat ukur getaran ( Vibration Monitoring)

Alat detector gas berbahaya & mudah terbakar ( Gas Detektor & Flamable Gas Detector)

Alat untuk pengambilan sampel gas, debu, mist, fume & aerosol ( gas, fume, aerosol sample pump & monitoring)

B. Peralatan Pemantau Lingkungan Jenis peralatan tersebut antara lain :

Peralatan sampling dan analisa udara maupun peralatan untuk sampling kualitas udara pada cerobong secara isokinetik otomatis

Alat pantau cuaca stasioner yang dilengkapi dengan penyimpanan data ( data logging) sesuai parameter yang diukur.

Peralatan pemantau kwalitas Air Bersih dan Air Minum ( Microbiologi, PH, Conductivity, ORP, Salinity, Dissolved, Turbiditi, TDS, Resisvity, Ion Meter dll..)

Perlatan pemantau kadar kimia dalam makanan

C. Scientific Instrument, untuk :

Laboratorium Kimia Dasar & Kimia Klinik : Laboratorium Bio Kimia, Kimia Klinik , Kimia Analitik, Mikrobiologi, Hematologi, Parasitologi, Kimia Farmasi & Toksikologi, Serologi, Virologi & Immunologi, Kimia Air, Kimia Makanan & Minuman, dll

Laboratorium Fisika & Biologi : Laboratorium Instrumentasi, Fisika dasar, Elektronika Medik, Radiology, alat elektronik, Elektronika Medik, Anatomi & Fisiology, Farmakologi dll.

D. Media dan Reagensia, Untuk:

Menunjang kebutuhan reagent pada Rumah Sakit, Puskesmas, Klinik, dan Laboratorium.

E. Survey Meter

F. Farmasi

Perhatian !

Perusahaan ini terdaftar sebagai Free Member. Hindari melakukan pembayaran sebelum bertemu penjual atau melihat barang secara langsung. COD (Cash On Delivery) atau bertemu langsung dengan penjual merupakan metode transaksi aman yang kami sarankan.

Deskripsi Produk Deskripsi

Detail Sound Level Meter Model 831 Larson Davis

Sound Level Meter Model 831 Larson Davis
Sound Level Meter Specifications
Averaging ( Integration method )	Linear or Exponential
RMS Time Weighting	Slow, Fast or Impulse
Frequency Weightings	A, C or Z
Peak Detector Frequency Weighting	A, C or Z
Gain	0 dB or +20 dB
Exchange Rates	3, 4, 5, or 6 dB with optional 831-IH
Sample Rate	51,200 Hz
Peak Rise Time	30 μμs
Physical Characteristics
Length with Microphone and Preamplifier	11.35 in	29.0 cm
Length, Instrument Body Only	8.8 in	22.4 cm
Width	2.8 in	7.1 cm
Depth	1.6 in	4.1 cm
Weight with Batteries, No Preamplifer or Microphone	13.6 oz	390 g
Weight with Batteries, Preamplifer and Microphone	1.2 lb	550 g
General Specifications
Reference level	114.0 dB re. 20 μPa
Reference level range	Single large range for SLM Normal for OBA option, Gain 0 dB
Reference frequency	1000 Hz
Reference direction	0° is perpendicular to the microphone diaphragm
Temperature	≤ ± 0.5 dB error between +14 to +122 °F ( -10 to 50 °C )
Storage temperature	-13 to +158 °F ( -25 to +70 °C )
Humidity	≤ ± 0.5 dB error from 30% to 90% relative humidity at 104°F (40 °C)
Equivalent Microphone Impedance	12 pF for Larson Davis 1/2 in microphone
Range Level Error ( OBA option )	≤ ± 0.1 dB relative to the reference range
Digital Display Update Rate	Four times per second ( 0.25 sec between updates ). First display indication is available 0.25 seconds after initiation of a measurement.
Effect of an Extension Cable	None ( up to 200 ft or 61 m with EXCxxx cable )
Electrostatic Discharges	The instrument is not adversely affected by electrostatic discharges
Extended Weather Options	-40 to +158 ºF ( -40 to +70 ºC ) operation with CER-831-E
Resolution Specifications
Levels	0.1 dB
Dose	0.1 %
Elapsed time	0.1 second
Real time clock	1 second
Calendar Through	31 Dec 2100
Integration Time
Time Averaged Levels and Sound Exposure Levels ( s )
Minimum	0.1 second
Maximum with Daily Autostore Enabled	Unlimited
Maximum with Daily Autostore Disabled	> 23 days with error < 0.5 dB
Dosimeter Metrics : TWA, Dose ( s )
Minimum	0.1 second
Maximum	Unlimited
Ln Statistics
Number of selectable parameters	6 in xx.xx% format, visible on the Model 831
Storage of Complete Table	0.1 dB Steps
Spectral Statistics	Requires Octave Analysis option ( 831-OB3 )
Markers
Number of Markers	10
Prenamed Markers	5 : Truck, Automobile, Motorcycle, Aircraft, Exclude
Link Marker to Automatic Sound Recording	Yes, requires Sound Recording option ( 831-SR )
Back Erase
Back Ease Time	5 or 10 seconds
Supported Modes	Manual
Measurement Control Modes
Available Modes	Manual Stop, Timed Stop, Stop when Stable, Continuous, Single Block Timer, Daily Block Timer
Timed Stop Time in	hh:mm:ss
Stop When Stable	Delta level in xx.x dB and time in hh:mm:ss
Continuous with Daily Auto-Store	1, 2, 4, 6, 12, 24, 48, 96 or 144 files per day, automated file numbering “yymmddnn.LD0”
Continuous Restart on Power Failure	Automatic if powered by 12VDC
Single Block Timer	Start date and time to End data and time
Daily Block Timer	Up to 3 blocks with each start and end date, blocks can cross date line
Clock Stability
< 1 sec in 24 hours, at 75 ºF ( +24 ºC )
< 10 sec in 30 days, at -40 to +158 ºF ( -40 to +70 ºC )
Digital Voice Annotation
Annotate Recordings	Use headset ( ACC003 ) or measurement microphone
Recording Sample Rate	8 ksps
Listening Options	On the Model 831 or using processing software for .wav files