15.3Preamplifier PR23
The preamplifier is an essential system to adapt the microphonic sensor to the input electronic of the sound level meter.
It is directly connected on the housing or through a cable of variable length (from 3 to 10 m in standard up to 100 m on request)
Features
Preamplifier PR23
Unit
Supply voltage
24
V
Supply current
<1
mA
Input resistance
>30
GΩ
Input capacitance
0,38
pF
Nominal gain
-0,01
dB
Bandwidth (-3 dB)
3-100 k
Hz
Bandwidth with extensions from 3 to 10 m (-3 dB)
3-22k
Hz
Noise (A-weighted)
<3
µV
Size: L - Diam
87
mm
Weight
< 55
gr
15.4Class 1 A – C – Z weightings and free field response
The frequency response of the whole
microphone / windscreen / A, C or Z weightings (sound level meter)
is in compliance with
standards in a given template according to the accuracy class of the instrument:
NF EN 61672-1 / class 1
.
Plots types of free field sound level meter are given below:
15.5Class 2 A – C – Z weightings and free field response
The frequency response of the whole
microphone / windscreen / A, C or Z weightings (sound level meter)
is in compliance with
standards in a given template according to the accuracy class of the instrument:
NF EN 61672-1 / class 2
.
Plots types of free field sound level meter are given below:
Technical features
60
Free field response
with A weighting
Free field response
with C weighting
Free field response
with Z weighting
Free-field response with A weighting
Template class 1 NF EN 61672-1
Free-field response with C weighting
Template class 1 NF EN 61672-1
Free-field response with Z weighting (LIN)
Template class 1 NF EN 61672-1
