Svantek SVAN 958A - Page 200

200
SVAN 958A User Manual
Table C.2.9. Typical noise level of the VLM with accelerometers
Filter
Type 3143M1, nominal
sensitivity 10 mV/ms
-2
Type 3023M2, nominal
sensitivity 1 mV/ms
-2
HP1
8,4 mm/s
2
107,0 mm/s
2
HP3
8,1 mm/s
2
84,5 mm/s
2
HP10
8,0 mm/s
2
77,7 mm/s
2
Wk
2,1 mm/s
2
56,2 mm/s
2
Wd
2,5 mm/s
2
41,1 mm/s
2
Wc
2,9 mm/s
2
70,8 mm/s
2
Wj
4,5 mm/s
2
59,0 mm/s
2
Wm
2,0 mm/s
2
51,0 mm/s
2
Wb
2,1 mm/s
2
48,6 mm/s
2
Wg
1,7 mm/s
2
50,4 mm/s
2
Wh
1,7 mm/s
2
28,2 mm/s
2
Vel1
180,0 m/s
10,8 mm/s
Vel3
51,2 m/s
2,1 mm/s
Vel10
16,5 m/s
445,0 m/s
Dil1
44,0 m
1,9 mm
Dil3
4,2 m
160,0 m
Dil10
320 nm
10,2 m
VelMF
12,0 m/s
323,0 m/s
Environmental, electrostatic and radio frequency criteria
Note: In the measurement conditions with the strong electromagnetic disturbances (e.g. near the
high-voltage transmission lines) the lower measurement limit can be drastically shifted as the
result of the external field influence on the measurement cables. In such cases, the careful
shielding of the measurement cables is strongly recommended. It is worth to underline the
estimation of the external influence can be performed in-site by the observations of the
measurement signal spectrum.
Effect of humidity <± 0.5 dB (for 30% < RH < 90% at 40C and 1000 Hz)
Effect of magnetic field < 25 dB (for 80 A/m and 50 Hz)
Effect of radio frequency fields (meets requirements of the ISO 8041-1:2017)
The greatest susceptibility (the least immunity) is achieved when in the VLM the HP1 weighting filter is selected
and the RMS measurements are considered.
The greatest susceptibility is achieved when the VLM and accelerometer with cable is placed along field and
the cable is coil as solenoid.