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Operation
Calibration with straight- and
angle-beam probes
Case A: With known material velocity
Calibration process
– Set the known material velocity in MTLVEL (function
group BASE).
– Couple the probe to the calibration block.
– Set the required display range in RANGE (function
group BASE). The calibration echo must be dis-
played on the screen.
– Position the gate on one of the calibration echoes
until the sound path of the echo is indicated in the
measurement line.
– After this, change the adjustment of the function
P-DELAY (function group BASE) until the correct
sound path for the selected calibration echo is
indicated in the measurement line.
5-18
Example:
You are carrying out the calibration for the calibration
range of 100 mm/5" via the function group BASE using
the calibration block V1 (thickness 25 mm/1") which is
laid flatwise.
– Set RANGE to 100 mm/5".
– Set the known material velocity of 5920 m/s
(233 "/ms) in MTLVEL.
– Set the gate so that it is positioned on the first
calibration echo (from 25 mm/1").
– Read the sound path in the measurement line. If this
value is not equal to 25 mm/1", change the adjust-
ment for the function P-DELAY until it is at 25 mm/1".
This completes the calibration of the USM 35X to the
material velocity of 5920 m/s (233 "/ms) with a calibra-
tion range of 100 mm/5" for the probe used.
Issue 01, 04/2005
Calibrating the USM 35X
Krautkramer USM 35X
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