CESVA VC431, User Manual, Page: 59 / 72

VC431
Instruction manual
57
4.7 Accelerometers
The VC431 is designed to work with these three accelerometers: AC031, AC032 and AC033.
AC031 AC032 AC033
Application
Hand-Arm
Buildings
Structure
Whole Body
Output IEPE IEPE IEPE
Transducer Piezoelectric Piezoelectric Piezoelectric
Design of the accelerometer Shear Shear Bending
Sensitivity 10 mV/g ± 5% 500 mV/g ± 5% 100 mV/g ± 5%
Dynamic acceleration range ± 600 g ± 12 g ± 60 g
Maximum shock acceleration
(destruction limit)
8000 g 2000 g 1000 g
Frequency range (f
10%
) 0.4 Hz .. 17 kHz 0.13 Hz .. 4.8 kHz 0.25 Hz .. 4kHz
Resonance frequency 42 kHz 9 kHz 10 kHz
Cross sensitivity < 5% < 5% < 5%
Intrinsic noise < 3000
μg
(3 .. 50kHz)
< 26
μg
(0.5 .. 20kHz)
200
μg
(20 .. 50kHz)
Noise spectrum density
0.1 Hz
1 Hz
10 Hz
100 Hz
300
μg/√Hz
100 μg/√Hz
30 μg/√Hz
10 μg/√Hz
2
μg/√Hz
0.8 μg/√Hz
0.2 μg/√Hz
0.08 μg/√Hz
Constant power feed current 2 .. 20 mA 2 .. 20 mA 2 .. 20 mA
Polarisation output voltage 12 .. 14 V 12 .. 14 V 8 .. 12 V
Output impedance < 150
Ω
< 100
Ω
-
Environmental Characteristics AC031 AC032 AC033
Operating range -20 / 120 °C -30 / 90 °C -10 / 50 °C
Temperature sensitivity
coefficient
-20 / 20 °C

0.05%/K
20 / 80 °C

±0.02%/K
80 / 120°C

-0.06%/K
- 0.05%/K - 0.11 %/K
Temperature sensitivity
gradient
0.03 ms
-2
/K 0.0005 ms
-2
/K 5 ms
-2
/K
Degree of protection IP60 IP67 IP60