Svantek SVAN 977A - 5.3 Setting parameters for profiles - Profiles

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SVAN 977A User Manual
Threshold level
The threshold level for the measurement trigger
(Level) can be set with 1 dB step in the range
from 24 dB to 136 dB in sound modes and from
64dB (1.585mm/s
2
) to 176dB (631 m/s
2
) in
vibration modes.
The instantaneous value of the RMS or LEQ
result measured with Filter and Detector
constant selected for the first profile (path:
<Menu> / Measurement / Profiles) compares
with the Level value every 0.5 ms.
Speed of the triggering signal changing
This position appears when the Grad+ trigger is chosen. The speed of the
Source value changing (Gradient) can be set in the range from 1 dB/ms to
100 dB/ms.
5.3 SETTING PARAMETERS FOR PROFILES – PROFILES
The Profiles list enables programming of
three virtual level meters (Profiles), which
measure the set of results with the same
weighting filter (Filter) and exponential
detector time constant (Detector) (see
Appendix D).
<ENT>
Weighting filter selection
Sound measurements
• Z class 1 according to IEC 61672-1:2013,
• A class 1 according to IEC 651 and IEC 61672-1:2013,
• C class 1 according to IEC 651 and IEC 61672-1:2013,
• B class 1 according to IEC 651,
• U class 1 according to IEC 61012:1990,
• AU class 1 according to IEC 61012:1990 and
• LF low frequency (20-200 Hz) Real-Time Band Pass Filter.
Vibration measurements
• acceleration measurements: HP, HP1, HP3, HP10, Wh,
• velocity measurements: Vel1, Vel3, Vel10 and VelMF,
• displacement measurements: Dil1, Dil3 and Dil10.
The characteristics of these filters are given in Appendix C.
RMS detector selection
Available RMS detectors (time constants):
Impulse, Fast and Slow for Sound
measurements and 100ms, 125ms, 200ms,
500ms, 1.0s, 2.0s, 5.0s, 10.0s for Vibration
measurements.