GE Krautkramer USM 35X - Calibration with Straight- and Angle-Beam Probes

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5-18 Issue 01, 04/2005 Krautkramer USM 35X

Operation

Calibrating the USM 35X

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.

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.