Handheld Digital Sound Level Meters HD-824 30 ~ 130dBA for noise study
 
 
Quik details :
 
Model Number:  HD-824
Type:Digital multi-function Sound Level Meter
Level Ranges:     30~80dB, 40~90dB, 50~100dB, 60~110dB, 70~120dB, 80~130dB, 30~130dB
Accuracy:      ±1.5 dB
Frequency Range:    31.5 Hz to 8.5k Kz
Linearity Range: 50dB
Measuring Level:     30~130dBA, 35~130dBC
Frequency Weighting:   A, C
Resolution:    0.1dB
 
 
Discription :
 
Digital multi-function Sound Level Meter designed to measure sound pressure level and are commonly used in noise pollution studies for the quantification of almost any noise, but especially for industrial and environmental. The device meets the measurement requirements of Safety Engineers, Health, Industrial Safety Offices and Sound Quality control in various environment. It features Bar-graph Indicating & Max Value Holding, built-in condenser mic and digital display. It accurately measures the sound level of just about anything from sound of level of environment to mechanic, vehicle, ship, loudness of computer fans and other noise with ±1.5 dB accuracy. It has the following advantages: 30~130dB range, with A/C weighting, fast/slow response, equipped with Max mode that captures and hold the maximum noise level, provides a windscreen for filter-out unwanted signals and a 9V battery with no extra charge. In almost all countries, the use of A-frequency-weighting is mandated to be used for the protection of workers against noise-induced deafness and the only weighting mandated by the international standard, the frequency weightings "C" being optional fitments.
 
 
Features :
 
Has CE marking, conforms with the essential health and safety requirements set out by the European Directives
Durable and built to last long and approved by strict quality and safety standards
Completely conforms to the IEC651 TYPE 2 and ANSI S1.4 TYPE 2 set standards
Wide measurement range of 30-130dB and Instantaneous sound measure function
With two equivalent weighted sound pressure levels, A and C
With fast and slow dynamic characteristic modes
AC and DC signed output for frequency analyzer level recorder, FFT analyzer, graphic recorder etc.
Equipped with windscreen that filters the undesired or unwanted signal
With Bar-graph Indicating & Max Value Holding with large LCD screen and 4-digit LCD display readings
With Tripod mounting provision on the back of the unit for field use
With FREE protective carrying case with contoured hardened foam inside fits the instrument securely. The device is sandwiched between hardened foam when closed to achieve optimum shock absorption
 
 
 
Specifications :
7 Sound Levels: 30 ~ 130 dB selectable using the Level Selecting Button switch
level 1: 30 ~ 80dB
level 2: 40 ~ 90dB
level 3: 50 ~ 100dB
level 4: 60 ~ 110dB
level 5: 70 ~ 120dB
level 6: 80 ~ 130dB
level 7: 30 ~ 130dB
Accuracy: ±1.5 dB
Frequency Range: 31.5 Hz to 8.5k Kz
Linearity Range: 50dB
Measuring Level: 30~130dBA, 35~130dBC
Frequency Weighting: A, C
Digital Display: 4 digits
Resolution: 0.1dB
Display: 0.5 secretary
Bar Graph: 50dB scale at 1dB step for monitoring current sound pressure level display period of 50mS
Level Ranges: 30~80dB, 40~90dB, 50~100dB, 60~110dB, 70~120dB, 80~130dB, 30~130dB
Over indicate over range: Under indicate less than lower limit of the range
AC output: 0.707 Vrms at FS output impedance approx 600 Ω
DC output: 10 mV / dB output impedance approx 100 Ω
Time weighting: Fast / Slow
Microphone: ½ inch electret condenser microphone
Max: Maximum hold
Power Supply: 6F22 9V alkaline cells (30 hrs life span) or DC 9V 100mA
Operating Temperature: 0°C to 40°C
Operating Humidity: 10% to 70% RH
Storage Temperature: -10°C to 50°C
Storage Humidity: 10% to 80% RH
Dimensions: 235mm(L) x 70mm(W) x 30mm(H)
Weight: approx 350g
 
 
Application :
 
This equipment has been designed to meet the measurement requirement of Safety Engineers,Health,Industrial Safety offices and Sound Quality control in various environment,which include factory,office,traffic,fam