Technical Specifications - Velleman AVM2050 Manual Del Usuario

11. CAL (calibration)
 The device has been calibrated very accurately. Normally, the device
will not need to be recalibrated.
 Contact your dealer if it should be done.
12. Measurements
 Do not keep the meter too close to your body when measuring; the
sound reflection could cause false results. Keep the meter at arm's
length and aim it straight toward the sound source.
 Take care when working with the AVM2050. The microphone and the
part with the pointer are very sensitive. They can easily be damaged
when the device falls.
 Do not use the device in a humid environment.
FOLLOW THESE STEPS TO DETERMINE THE APPROPRIATE
RESPONSE, WEIGHTING AND RANGE:
1. Set the RESPONSE switch to FAST if the sound consists of short signals
or when you only want to measure sound peaks. Set RESPONSE to
SLOW if you're more interested in an average value.
2. Set WEIGHTING to A if you want to measure the noise level and select
C to measure the sound level of music.
3. Set the RANGE selector to the highest level (120 dB) and lower it
gradually until the pointer clearly moves. Always set RANGE as low as
possible for optimum accuracy.
Example: if RANGE is set to 80 dB and the pointer indicates more or
less -5, then set RANGE to 70 dB so the pointer can show +3 for a
73 dB level.
Important:
For correct results, the signal to be measured must be at least 10 dB louder
than the background noise.

13. Technical Specifications

range ................................................................... ≤ 126 dB
positions .............................. 60, 70, 80, 90, 100, 110, 120 dB
load impedance ..................................................... 1 kΩ min.
distortion ............................................ < 2 % @ 1 kHz, 0.5 V
microphone ..... electret condenser microphone, omnidirectional,
.......................... directionality increases at higher frequencies
precision .................................................... ± 2 dB @ 144 dB
weighting .................................................................. A or C
response ............................................................ slow or fast
output signal ......... max. 1 V deviation @ 1 kHz for entire range
V. 02 – 18/04/2016
AVM2050
5 ©Velleman nv