Olympus Sonic 1200S/HR, Руководство пользователя

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Applications 91
8. Repeat steps 4 - 8 to verify that both the0.100 and 0.500 inch signals line up.
9. Check the 0.200, 0.300 and 0.400 inch steps. If they line up, the Sonic
®
1200S/HR is
calibrated. If they do not line up closely, repeat calibration steps 4 - 8.
5.3.2 Instrument Calibration - Other Ranges
The instrument is calibrated similarly for other ranges and materials. Use step blocks made of
the same test material and thickness range as the material being measured.
With practice, you may optimize the displayed ultrasonic signals by the use of Gain, Damping,
Display, and Reject controls. Reject controls can be used to improve the display by eliminating
small baseline signals or noise.
5.3.3 Instrument Calibration - Testing
When using the delay line method, the best results are obtained only when several multiples or
echoes are displayed. In some attenuative materials or plastics, only one back echo may be
obtained. In this case, the surface echo to 1st back echo signals can be used as a measurement,
but accuracy will not be quite as good.
5.3.4 Thickness Measurements From Delay Line Interface to
the 1st Back Wall Reflection
Press the GATE1 menu key and the following menu will appear. This menu provides
changeable parameters, such as Polarity, Level, Position, and Width, for either flaw or
thickness measurements of Gate1.
For thickness measurements, adjust the controls as follows.
1. To enable Gate1, press the GATE1 menu key again, and rotate the SmartKnob™ to select
the “+” Gate1 alarm.
2. Press the Gate LEVEL menu soft key and rotate the SmartKnob™ to the desired screen
height, such as 40%.