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USER MANUAL MAGIC 500 PLUS ULTRASOUND UNIT
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2. Put ultrasonic coupling gel to the appropriate site of swine’s back, in order to make good contact between the swine skin
and the sound window. The probe is placed against the skin of the animal and is kept perpendicular to the back. Move the
probe gently, make sure there are no air bubbles between the skin and probe. Keep the swine quiet during the test (you
can feed the swine during the test).
3. After the image is automatically frozen, the machine automatically displays four groups’ measurement data and the
corresponding waveform.
Note: You can get accurate values of the three layers of backfat at the P2 site (the last rib). Many hogs have a thin third layer
of backfat. As they increase in weight and age, the third layer becomes thicker and wider spread over the body. Measurement
at P1 site (the trailing edge of shoulder: about 4 – 5 rib) is more diffi cult and inconsistent. P3 site (the lumbosacral junction)
will get accurate measurement for two layers of backfat but may not give an accurate measurement for the third layer due to
the muscle tissue.
9.3 Measurement of Swine’s Lean Percentage
1. In real-time A mode, press key to enter the main menu, press direction keys to move the cursor to “Weight” in
the display area. Press direction keys to adjust the “Weight” (range: 37 ~ 300kg).
2. Put ultrasonic coupling gel to the appropriate site of swine’s back, in order to make good contact between the swine skin
and the sound window. The probe is placed against the skin of the animal and is kept perpendicular to the back, move the
probe gently, make sure there are no air bubbles between the skin and probe. Keep the swine quiet during the test (you
can feed the swine during the test).
3. After the image is automatically frozen, the backfat thickness and loin thickness are measured, and the lean percentage
is automatically displayed in the right area of the screen.
4. Press key to return the real-time status.
Explanation: Before measuring the swine’s lean percentage, you must enter the weight of the swine (weight range 37 to 300 kg);
otherwise, the default weight is 100 kg.
9.4 Measurement Considerations
1. When measuring older animals, it might be necessary to remove the hair at the site and wet the skin with hot water, then
apply light oil to wet the skin one minute or two before measuring. Always keep the probe perpendicular to the swine’s
back; measurement errors may result if the probe is at an angle. If you choose the inaccurate site, such as animal shoulder
or arm, the measured result is not accurate.
2. When the probe leaves the measuring site, it needs to reapply ultrasonic coupling gel evenly to continue measurement.
3. If you have a bad contact, fi rst remove any possible manure, straw and excess hair, etc., which may cause a poor contact
between the sound window and skin, leading to inaccurate measured results.
4. Recommend using dedicated ultrasonic coupling gel.
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