Svantek SVAN 958A - Page 45

45
SVAN 958A User Manual
• if Slope + is selected, the triggering condition is fulfilled only when the rising value of Source is passing
the level determined by Level.
• if Slope – is selected, the triggering condition is fulfilled only when the falling value of Source is passing
the level determined by Level.
• if Grad + is selected, the triggering condition is fulfilled only when the signal has the greater level than
determined by Level and the gradient of the signal is greater than determined by Gradient. Otherwise
the triggering condition is not fulfilled.
• if Grad - is selected, the triggering condition is fulfilled only when the signal has the lower level than this
determined by Level and the gradient of the signal is lower than determined by Gradient. Otherwise the
triggering condition is not fulfilled.
Step for checking the triggering condition
The Integr. position enables the user to select time (integration period) for
condition evaluation: equal to Logger step (path: <Menu> / Input /
Measurement Setup), 100ms, 1.0s, equal to Int. Period (path: <Menu> / Input
/ Measurement Setup) or current measurement time calculated from
measurement start - Meas. Time (path: <Menu> / Input / Measurement Setup).
If Meas. Time is selected the triggering condition is checked every second and
RMS is averaged from the begining of the measurement (Meas. Time is
displayed in the right upper corner of the display right under the real Time
Clock).
Source for triggering condition
The Source position enables the user to select
the type of source for triggering condition
calculation – result calculated for the selected
profile:
- PEAK, MAX, MIN or RMS for acoustic input
and
- PEAK, P-P, MAX, MIN, RMS or VDV for
vibration input.
►
Threshold definition
The Level position enables the user to select the value of threshold for
triggering condition in the range of 60 dB to 200 dB for Sound input and of
1.00 mm/s
2
to 10.0 km/ s
2
for vibration input. The vibration units can be set in
the Display Scale window (path: <Menu> / Display / Display Setup / Channel x
/ Display Scale).
Speed of the triggering signal change
The Gradient position appears when the Grad - or Grad + trigger is chosen.
The speed of the triggering signal changes can be set from 1 dB to 100 dB
range. Speed is defined as dB per Logger Step.