General notes
5.10 Calculation of flaw position (function group TRIG)
In the function group TRIG you will find the functions for setting the flaw position calculation when using angle- beam probes.
– If necessary, use E to change the operating level. – Use u to select the function group TRIG.
The functions in the group TRIG enable to automatically calculate the (reduced) projection distance and the real
depth of the flaw in addition to the sound path S, and to digitally display them in the measurement line.
• Projection distance PD:
distance of probe index (sound exit point) from the position of the flaw, projected on the surface • Reduced projection distance rPD:
distance of the probe’s leading face from the position of the flaw, projected on the surface
• Depth d:
Distance between flaw position and surface
Calculation of flaw position (function group TRIG)
Operation
5.10 Calculation of flaw position
(function group TRIG)
In the function group TRIG you will find the functions for setting the flaw position calculation when using angle- beam probes.
– If necessary, use E to change the operating level. – Use u to select the function group TRIG.
The functions in the group TRIG enable to automatically calculate the (reduced) projection distance and the real
depth of the flaw in addition to the sound path S, and to digitally display them in the measurement line.
• Projection distance PD:
distance of probe index (sound exit point) from the position of the flaw, projected on the surface • Reduced projection distance rPD:
distance of the probe’s leading face from the position of the flaw, projected on the surface
• Depth d:
Distance between flaw position and surface
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Operation
When using angle-beam probes, the instrument can additionally calculate the sound path section or so- called leg L up to the next reflection point. This sound path section or leg can be displayed as the measured value La, Lb, or Lc.
ANGLE (angle of incidence)
The ANGLE function enables you to adjust the angle of incidence of your probe for the material used. This value is required for the automatic calculation of the flaw position.
Adjustment range: 0° to 90° Operation:
– Use v to select the ANGLE function, and then use the right-hand rotary knob to select the required setting.
X-VALUE (X-value of the probe)
The function X-VALUE enables you to set the X-value (distance between the probe’s leading face and probe index/sound exit point) of the probe used. This value is required for the automatic calculation of the reduced projection distance.
Adjustment range: 0 to 100 mm / 0 to 40 “ Calculation of flaw position (function group TRIG)
Operation
When using angle-beam probes, the instrument can additionally calculate the sound path section or so- called leg L up to the next reflection point. This sound path section or leg can be displayed as the measured value La, Lb, or Lc.
ANGLE (angle of incidence)
The ANGLE function enables you to adjust the angle of incidence of your probe for the material used. This value is required for the automatic calculation of the flaw position.
Adjustment range: 0° to 90° Operation:
– Use v to select the ANGLE function, and then use the right-hand rotary knob to select the required setting.
X-VALUE (X-value of the probe)
The function X-VALUE enables you to set the X-value (distance between the probe’s leading face and probe index/sound exit point) of the probe used. This value is required for the automatic calculation of the reduced projection distance.
Adjustment range: 0 to 100 mm / 0 to 40 “ Calculation of flaw position (function group TRIG)
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Operation
Operation:
– Use v to select the function X-VALUE, and then use the right-hand rotary knob to set the required value.
THICKNE (material thickness)
Use the THICKNE function to set the material’s wall thickness. This value is required for the automatic calculation of the real depth.
Adjustment range: 1 to 1000 mm / 0.05 to 400 “ Operation:
– Use v to select the THICKNE function, and then use the right-hand rotary knob to set the required value.
Calculation of flaw position (function group TRIG)
DIAMET (outside diameter of the test
object)
You will need the DIAMET function for tests on circular curved surfaces, for example when testing longitudi- nally welded tubes. In order to make the USM 25 carry out the corresponding correction of (reduced) projection distance and depth, you should enter the outside diameter of your test object in this function. Adjustment range: 10 to 2000 mm / 0.4 - 800 “
If you plan to carry out the flaw position calculation for plane-parallel (flat) test objects, the DIAMET function should be set to flat.
Operation:
– Use v to select the DIAMET function, and then use the right-hand rotary knob to set the required value.
Operation
Operation:
– Use v to select the function X-VALUE, and then use the right-hand rotary knob to set the required value.
THICKNE (material thickness)
Use the THICKNE function to set the material’s wall thickness. This value is required for the automatic calculation of the real depth.
Adjustment range: 1 to 1000 mm / 0.05 to 400 “ Operation:
– Use v to select the THICKNE function, and then use the right-hand rotary knob to set the required value.
Calculation of flaw position (function group TRIG)
DIAMET (outside diameter of the test
object)
You will need the DIAMET function for tests on circular curved surfaces, for example when testing longitudi- nally welded tubes. In order to make the USM 25 carry out the corresponding correction of (reduced) projection distance and depth, you should enter the outside diameter of your test object in this function. Adjustment range: 10 to 2000 mm / 0.4 - 800 “
If you plan to carry out the flaw position calculation for plane-parallel (flat) test objects, the DIAMET function should be set to flat.
Operation:
– Use v to select the DIAMET function, and then use the right-hand rotary knob to set the required value.
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Operation
Data saving (function group MEM)