Landtek SL-1256DOS Logging Personal Noise Dose Meter

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Product Description

Landtek SL-1256DOS Logging Personal Noise Dose Meter

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 Landtek SL-1256DOS Logging Personal Noise Dose Meter

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.

Specifications Landtek SL-1256DOS Logging Personal Noise Dose Meter

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)

 

Accessories

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

 

Setup

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

 

Measurements Parameters

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

 

Landtek SL-1256DOS Logging Personal Noise Dose Meter Datasheet

 

 

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