How to sell ultrasonic level meter / gauge manufacturers

YEH-X ultrasonic level meter / ultrasonic sensors an ultrasonic level gauge user self-test: A, the instrument is the most simple test method: Wall turned adequate power supply for the ultrasonic transmitter mouth open wide in vertical alignment (fairly level) as the reflective surface of the ultrasonic waves, while observing the air L (L can continuously press the Shift key to view) figures, when the digital display L and the actual distance was described measurements often Description: 1, the test The process should pay attention: when the actual air meter distance L exceeds the maximum measurement distance L, as invalid 2, under normal circumstances, the blind range of the instrument d + C = meter maximum measurement distance L (max) 3, instrument range d.. is the output current and relevant parameters P, and other unrelated. B, the ultrasonic transmitter to the open mouth of the sky, one minute less than the meter should show F00F, in principle, said meter at this time there is no echo received describing your meter jamming performance is good. C, press the Shift key to find P (Instrumented should output current), a direct measurement of the output current with the ammeter and P values ??should be fairly described output is normal. After more than three items of inspection, the user can ease of use of the two, ultrasonic level meter basic parameters and functions: 1, the signal output → 4 ~ 20mA standard or optional 2 485,232, ranging capability → known range 4,7,10,12,15 , 17,20 m and power 50m 3, launch full-→ 7 ° ~ 12 ° emission angle is proportional to the size and range capability. 4, the mode of → measurement distance L and H mode transition measure level, menu options. 5, blind → 0.25 ~ 1.0m → blind spots inherent in the menu to be investigated. 6, the resolution → measuring distance <10m → 1mm. Measuring distance ≥10m → 10mm 7, protection class → Ip66. 8 ,, precision → 0.5%. 9, Ambient temperature → -15 ~ + 55 ℃ Third, the ultrasonic level meter Selection: Selection of the election was whether the right of subsequent use of results play a key role, and here we only provide general principle of selection for reference purposes only 1. When using a good environment and the system needs to collect only relevant data, without significant when the second field, generally used in the transmitter can be, when you have other requirements, such as: the need to control the output relay switch other electrical mechanism, which When the best choice for fission. 2, when the ambient humidity, no ventilation, more dust and other harsh environment is recommended split nearly pass type, pass near the transducer sealed with a certain explosion-proof, able to withstand harsh environments, Its only drawback is the small point transmission distance (limit cable length about 30m).