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首页Metallurgical Equipmentsother meter Logging Personal Noise Dose Meter SL-1256DOS
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Logging Personal Noise Dose Meter SL-1256DOS

Logging Personal Noise Dose Meter SL-1256DOS

The personal noise dose meter is test equipment to evaluate the noise condition of working environment by measuring the accumulated noise exposure.

Principle of Measuring Accumulated Noise Exposure

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分类: Metallurgical Equipments, other meter 标签: Logging Personal Noise Dose Meter SL-1256DOS
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描述

Logging Personal Noise Dose Meter SL-1256DOS

The personal noise dose meter is test equipment to evaluate the noise condition of working environment by measuring the accumulated noise exposure.

Principle of Measuring Accumulated Noise Exposure

DOSE is a parameter used to quantify noise exposure measured in a period, during turns of % noise exposure relative to 90dBA for 8 hours.
i.e. 100% DOSE = 90dBA for 8 hours
This is known as the Criterion. Other criterion are available such as 100% DOSE = 85dBA for 8 hours to meet legislation in different countries.
If the person stayed in this environment for 4 hours, he would receive 50%DOSE.
Also if the noise level was say 93dBA, 3dB higher, a 100% DOSE would be accumulated in only 4 hours, The above example is for a dose meter with 3dB Exchange Rate, where a 3dB increase in sound level corresponds to a doubling energy. A dose meter with 5dB Exchange Rate is also, available where the sound must increase by 5dB to double the dose as required to meet noise legislation in some countries.

Features

This Noise Dose Meter meets the GB/T 15952 standard.
The Noise Dose Meter measure the frequency weighted noise exposures and peak sound levels simultaneously.
* Simple operation, including direct read–out of results.
* Eight built–in standard dose measurement setups : OSHA80, OSHA90, MSHA-80, MSHA-90, DOD, ACGIH, ISO85 and ISO90.
* Nine user – defined measurement setups.
* A single sound level meter (SLM) setup.
* A single sound level meter (SLM) setup.
* 50 dose (DATA) result stores.
* Download of setups from PC to the meter.
* Keypad lock protects meter against accidental operation.
* Timers support pre–selection of measurement time and duration.
* Use USB data output to connect with PC.
The meter is ideal for quick on–site surveys and for monitoring personal noise exposure in accordance with European ISO or USA OSHA, MSHA, DOD AND ACGIH standards.
The meter is two overlapping measurement ranges : 60 – 130 & 70 – 140dB, A & C RMS weightings, Linear & C Peak weightings, Fast & Slow time weightings, and energy exchange rates (Q) of 3, 4, 5 & 6. In dose measurement mode, it display % dose, % dose projected for an 8 hour period, peak level and measurement duration.
For countries that are subject to European Union regulations or the equivalent ISO standards,   the   meter   measure   the   daily   sound   exposure   level   (LAeq,8hr,Pa2h according to IEC 61252, which is identical with the L EX,8h   required by ISO 1999), while for USA OSHA/MSHA regulations they measure the Time Weighted Average level (TWA).
When used as a sound level meter it display sound level, time–averaged (L Aeq) sound level, peak and sound exposure level (SEL).
The meter is automatic run timing facilities controlled by the built–in clock and time–history recording capabilities. Sampling times can be specified between 1s and 1 hour, while storage is 120000 data points.
The meter is able to measure and save up to five specified Ln values (Statistical noise levels). Run duration, start and stop times preset, and other setting via the meter keys or software.

 

Standard Applied IEC61252, ANSI S1.25 – 1992 for dose meter and sound exposure meters. IEC 61672-1-2013 Class 2
Microphone 1/2-inch electret condenser microphone with 31-inch integral cable
Display Liquid Crystal Display
Measurement Ranges (Linearity and Indicator ranges at 4KHz) 60 – 130 : 60 – 130dB (A and C)
70 – 140 : 70 – 140dB (A and C)
Peak   Ranges   (C–weighted   or   Linear   Peak   over the   top   40dB   of   each   measurement   range) 60 – 130 : 93 – 133dB Peak
70 – 140 : 103 – 143dB Peak
Frequency Weightings RMS Detector: A or C
Peak Detector: C or Z (Linear)
Time Weightings Fast and Slow (RMS detector)
Exchange Rate 3, 4, 5 or 6dB
Stabilization Time 10 seconds from power on
Threshold and Criterion Levels (From the setup, predefined in the built – in setup according to applicable standards) User–defined setups in the following ranges :
Threshold Level : 70 – 90dB in 1dB steps
Criterion Level : 80, 84, 85 or 90dB
Criterion Level : 80, 84, 85 or 90dB At 0.1dB above the top of the selected measurement range
At 0.1dB above the top of the selected measurement range Under–Range Indications
High Level Detector 115dB
Keypad Lock Lock and unlock by pressing key combinations: Up and right arrows to lock; left and down arrows to unlock
Clock Real–time clock with calendar
Memory Results from 50 measurements can be stored for later viewing and download
Measurement Control Measurement Duration : May be set to 5, 10, 15, or 30 minutes or 1, 2, 4, 8, 10, 12, or 24 hours
Timers Up to 16 timers(automatic start and stop)can be set(maximum up to one month ahead of measurement time)
Timer Controlled Started / Stop Set up from the PC software or meter keypad
Logging All measurement parameters values can be logged
Logging Period (LP) 1s, 2s, 5s, 10s, 15s, 20s, 30s, 1min, 2min, 5min, 10min, 15min, 20min, 30min or 60min
Logging Capacity 120000 values can be stored at any one time
Setup Eight built–in (predefined) default setups are included. Nine additional user–defined setups can be stored
Output USB interface
Power Supply 4×1.5V AAA Size (UM-4)Battery
Battery Indicator Symbol indication battery voltage level in 4 steps. Indicator flashes when voltage is insufficient for operation
Operating Temperature & Humidity 0 – 50ºC (32 to 122ºF) ,10 – 90%RH
Storage Temperature & Humidity -10 – 60ºC(14 to 140ºF) ,10 – 75%RH
Size 140x72x34mm
Weight Approx. 350g (including batteries)

 

Standard Accessories Main Unit
External Probe
Screwdriver
Carrying Case (B04)
Operation Manual
Optional Accessories USB Data with Software
Bluetooth Data Adapter with Software

 

Setup OSHA-80 OSHA-90 MSHA-80 MSHA-90 DOD ACGIH ISO-85 ISO-90 User1-9 SLM
Measurement Range (dB) 70–140 70–140 70–140 70–140 70–140 70–140 70–140 70–140 70–140 70–140
Time Weighting Slow Slow Slow Slow Slow Slow Fast Fast Fast Slow
Frequency Weighting A A A A A A A A A A
Peak Frequency  Weighting Lin Lin Lin Lin Lin Lin C C C Lin
Exchange Rate 5 5 5 5 4 3 3 3 3 3
Threshold (dB) 80 90 80 90 80 80 70 70 80 N/A
Criterion Level (dB) 90 90 90 90 85 85 85 90 90 N/A
Allow User to Change Setup No No No No No No No No Yes Yes

 

OSHA-80 OSHA-90 MSHA-80 MSHA-90 DOD ACGIH ISO–85 ISO–90 User1-9 SLM
DOSE% DOSE% DOSE% DOSE% DOSE% DOSE% DOSE% DOSE% DOSE% SPL
PDOSE% PDOSE% PDOSE% PDOSE% PDOSE% PDOSE% PDOSE% PDOSE% PDOSE% MAX
TWA TWA TWA TWA TWA LEPd LEPd LEPd TWA LEQ
PTWA PTWA PTWA PTWA PTWA LEQ LEQ LEQ PTWA LEQ
LAVG LAVG LAVG LAVG LAVG SEL SEL SEL LAVG PKZ
LEQ LEQ LEQ LEQ LEQ SE(Pa2h) SE(Pa2h) SE(Pa2h) LEPd
SEL SEL SEL SEL SEL MAX MAX MAX LEQ
MAX MAX MAX MAX MAX PKZ PKZ PKZ SEL
PKZ PKZ PKZ PKZ PKZ L10 L10 L10 SE(Pa2h)
L10 L10 L10 L10 L10 L50 L50 L50 MAX
L50 L50 L50 L50 L50 L90 L90 L90 PKZ
L90 L90 L90 L90 L90 L95 L95 L95 L10
L95 L95 L95 L95 L95 L99 L99 L99 L50
L99 L99 L99 L99 L99 SPL SPL SPL L90
SPL SPL SPL SPL SPL L95
99
SPL
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