Instructions: 1. Press the "test" button with your thumb, you will hear the "drop" sound, indicating that the machine is normal, sufficient power. If there is no sound, one is that the machine battery is not enough, please replace the battery; the other is that the machine has trouble, please contact the dealer in time. 2. Before the test, the ultrasonic coupling agent was applied to the sound window of the pregnancy tester to ensure that there was sufficient and good contact between the sound window of the pregnancy tester and the sow skin. It is advisable to use special ultrasonic coupling agent or vegetable oil. 3. keep the pigs quiet during the test period (* feed them during the test). 4. Place the probe on the inside of the sow's right hind leg at an angle of 45 degrees from the hind leg inches (approximately between the penultimate second and third nipples) (see Figure 2). 5. whenever the probe leaves the measuring point, it is necessary to reapply the ultrasonic coupling agent and continue the test. Note: this requirement is extremely important and must be observed.
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