3.4 Effect of environmental conditions
In compliance with paragraph 6.6.9 of IEC 61672-1:2014 Tango_Plus is not appropriate to measure levels
lower than 74 dB for an electric field strength exceeding 10 V/m.
3.4 Effect of environmental conditions
In order to avoid the effect of sound reflections from the body of the operator interfering with the measure-
ment, Tango_Plus should be located as far as possible from the body. Thus, when actually performing the
measurement, the operator should place himself at a distance behind the tripod-mounted meter, or extend
the hand-held meter as far from the body as is comfortable.
NOTICE! When the temperature changes by more than 15
◦
C an acclimatization time
of 30 min must be safeguarded.
Within the limits of the linear operating ranges, the measurement of low sound levels is possible without
restrictions. Then a sufficient signal-to-noise ratio is guaranteed.
NOTICE! If there is a significant change in the static air pressure, an acclimatization
time of 1 min must be observed to ensure pressure equalization through
the holes provided.
3.4.1 Effect of mechanical vibration
To measure the influence of mechanical vibrations you need a second sound level meter with officially verified
calibration as reference device. The microphone of the reference device has to be positioned in a maximum
distance of 0.2 m from the microphone of the tested device and must not be exposed to the mechanical
vibrations of the exciter.
Figure 3.12: Alignment for vibration test
SINUS Messtechnik GmbH 39 of 47 Manual Tango_Plus
To Next Page
Loading...