AVM2050 – ANALOGUE SOUND LEVEL METER
1. Introduction and Characteristics
Thank you for buying the AVM2050! Please read the manual thoroughly before bringing this device into service.
If the device was damaged in transit, don't install or use it and contact your dealer.
The AVM2050 allows you to measure the sound level in virtually every acoustic environment (high or low frequency,
high or low sound levels, broadband, interrupted or continuous). It can be used to measure the noise level in
factories, schools, offices and airports, or to test the acoustics of studios, theatres and hi-fi installations. The
AVM2050 has an easily readable result readout, which allows swift measurements in any location.
• Battery level readout (see §3)
• 7 selectable ranges: for 50 to 126dB measurements (see §4)
• RCA output: to connect the device to a hi-fi installation or test equipment (see §5)
• Measuring frequency: fast / slow response: to measure sound peaks or average sound levels (see §6)
• A & C weighting: for acoustic analyses and measurements (see §7)
2. Specifications
Selector position
60dB
Measuring range
50-66dB
Load impedance
Distortion
Microphone
Power
Accuracy
Standard
Weighing
Response
Output signal deviation
Battery test
Battery life
Dimensions (H x W x D)
Weight
3. Battery
The AVM2050 requires one 9V battery. Alkaline batteries usually give better results and last longer. Open the battery
compartment and remove the old battery. Insert the new one. Mind the polarity.
To test the battery, put the RANGE selector to BATT: if the meter moves to the BATT TEST area, the battery is OK.
REMARKS:
• Set the RANGE selector to OFF when you are not using the AVM2050. That way the battery will last longer.
• Remove the battery when you will not be using the AVM2050 for a while.
4. Range
Select 1 of the 7 measuring ranges (16dB per range) using the RANGE selector. The numbers refer to the zero point
of each of the 7 ranges. The pointer indicates the sound level compared to the reference value.
Example: when the RANGE selector is set to 80dB and the pointer points to -3, the sound level is 77dB.
AVM2050
70dB
80dB
60-76dB
70-86dB
min. 1K
< 2% @ 1kHz, 0.5V
electret condenser microphone, omnidirectional,
more directional at higher frequencies
1 x 9V battery
± 2dB @ 144dB
0.2dB
A or C
fast or slow
max. 1V @ 1kHz
"OK" between 7 & 10.5V
110 hours (alkaline battery)
160 x 62 x 44mm
± 185g
Referencia Electrónica Embajadores:
90dB
100dB
80-96dB
90-106dB
- 1 -
INPA250
110dB
120dB
100-116dB 110-126dB
VELLEMAN