Waygate Technologies Krautkramer USM 100, Руководство по эксплуатации, Страница: 170 / 330

5 Operation Making measurements
170 Rev. 9 (09/2023) Krautkrämer USM 100
5.19 Making measurements
General notes
Please pay attention to the following notes when using
the USM 100 for measurements:
● To ensure proper measurements, please make sure
to calibrate correctly.
● All amplitude measurements are made at the highest
or the first signal in the gate.
● All distance measurements are made at the intersec-
tion point between the gate and the first echo flank
(TOF mode = Flank , J-Flank / First Peak ) or at the
peak of the highest echo in the gate (TOF mode =
Peak ).
● If the amplitudes of the echoes in the gate do not ex-
ceed 5 % screen height, all corresponding sound
path and amplitude readings are rejected. This en-
ables to avoid quickly changing, random readings
based on background noise of the USM 100.
The following example shows the dependency of dis-
tance measurement on the echo waveform, i.e. on the
height of the gate threshold and thus on the selection of
the intersection point at the signal.
Gate A set to 20 % screen height
measured sound path SA/ = 92.63 mm
Gate B set to 80 % screen height
measured sound path SB/ = 93.58 mm