12.10 Resolving Measurement Problems; Table 16 Measurement Troubleshooting - Olympus 45MG User Manual

DMTA-10022-01EN, Rev. C, January 2015

12.10 Resolving Measurement Problems

Symptom
No echoes or weak echoes,
and no measurement (LOS)
Strong echoes, no
measurements
Strong echoes, incorrect
measurements
208 Chapter 12

Table 16 Measurement troubleshooting

• There is insufficient couplant, especially on
rough or curved surfaces.
• The gain is set too low.
• The material is too attenuating, or the surfaces
are unparalleled or too rough.
• The gage requires service; try the master reset.
• The echo is too low in amplitude to be
detected. Try increasing the gain.
• The echo may be in a blank area of the
waveform, and cannot be detected.
• The echo is outside of the echo window.
• Out of calibration; perform calibration.
• Differential mode — check DIFF flag.
• Min or Max mode — see "Using the
Minimum, Maximum, or Min/Max Thickness
Mode" on page 129.
• The material is too grainy, has flaws,
inclusions or laminations, or very high surface
noise; try manual gain adjustment or
extended blank.
Possible explanation