AutoTest® Digital Sound Level Meter

It is used to measure and monitor noise levels to ensure that volume levels are within tolerances or an expected range in any industrial or domestic application. This sound and vibration tool is commonly used to test automotive exhausts volume in road worthy checks carried out by an Approved Inspection Station (AIS). A sound level meter can also be used to monitor sound levels within workplaces, such as factories and plants and ensure that employees are guided to wear hearing protection when excessive noise levels are present. It is also commonly used on construction sites when commercial machinery such as excavators and bulldozers are used. Other uses include road noise studies for setting up sound breaks along freeways and for ensuring concerts and public events maintain an acceptable volume within local regulations. Sensitivity can be adjusted for different ambient conditions and environments.

Operation Directions:

Turn on power.
Select desired response and weighting, also select desired range.
If weighting for general noise sound level, please select dBA.
If the sound source consists of short bursts, set response to FAST. To measure average sound level, use the SLOW setting.
When MAX mode is chosen, the instrument will capture and hold the maximum noise level.

The unit complies with IEC651 TYPE 2 & Ansi S1.4 TYPE 2 for sound level meters
Instantaneous level measurement
Measurement range: 30 – 130 decibel
With two equivalent weighted sound pressure levels, A and C
Fast and slow modes
AC output for frequency and analyser level recorder, FFT analyser, graphic recorder etc

Accuracy	±1.5dB
Frequency Range	31.5Hz to 8.5kHz
Linearity Range	50dB
Measuring Level	30 – 130dBA, 35 – 130dBC
Frequency Weighting	A, C
Digital Display	5 digits
Resolution	0.1dB
Bar Graph	50dB scale at 1dB step for monitoring current sound pressure level
Display Period	50mS
Level Ranges	30 – 80dB; 50 – 100dB 60 – 110dB; 80 – 130dB Overrange indicator;underrange indicator
AC Output	1.707 Vrms at FS output inpedance approx 600Ω
DC Output	100mV/ dB output impedance approx 1000Ω
Time Weighting	Fast/ Slow
Microphone	½inch Electret Condenser Microphone
Max	Maximum Hold
Power Supply	1*9V alkaline cells or DC 9V adapter
Power Life About	30hrs (alkaline cells)
Self Calibration Time	10 sec (at turn on)
Operating Temperatur	e 0°C – 40°C 10% to 80% RH
Storage Temperature	-10°C to 60°C