How can the clamp-type ultrasonic flowmeter fail to display the flow rate?

Ultrasonic flowmeters can only measure liquids, such as tap water, sewage, seawater, pure water, and water, and relatively clean liquids. If the liquid contains a large amount of agglomerated dirt or a large number of air bubbles, ultrasonic transmission and reception will be affected. Should not use the external clamp type ultrasonic ultrasonic flowmeter. Most oils and gases are also not suitable for use.
     The main steps for the installation of an external clamp type ultrasonic flowmeter are: selection of mounting points, input of parameters, determination of sensor installation distance, application of a couplant, and bonding of a sensor. Most users can clearly understand how the above steps are performed when they read the manual. However, according to the method, the traffic cannot be displayed. The main reasons are:
1. To understand the installation distance automatically calculated by the flowmeter is too mechanical, to accurately set the distance to the mm to install, in fact, this distance is only a reference distance, due to the influence of the pipeline environment, such as the wall thickness deviation, the inner wall is not smooth, it is possible Causes the deviation of the acoustic signal. Therefore, we have a very practical method for actual installation: first fix the upstream sensor, then press the M90 ​​button on the host to check the signal strength and quality. In general, both UP and DN should be above 80, and Q below 50. The flow meter cannot measure normally.
2. In the user installation problem, the user often has UP and DN are 0 when checking the M90 ​​menu. The main reason for this is that the couplant is not applied or the clamp is not tightened. Another reason is that there is no pipe in the installation. water.
3. The reason why the Q value is 0 is mostly due to improper distance. At this time, open the M90 ​​menu and move the downstream sensor slowly. When the Q value gets a maximum value, it can be fixed.

Horizontal Type Air Handling Unit

Air flow 1,000m3/h-50,000m3/h,Coil type 4rows/6rows/8rows

AMRTA air handling unit mainly constructed with filter, heat exchanger, fan motor, fan blower and other main components.

Operation & Maintenance:
1.Before the unit operation, check the water pipe valves system and duct equipment. Make sure everything is under good condition.
2.Check the fan motor and blower moving parts regularly for their connection, operation and rotating direction. Readjust it if necessary.
3.Air filter cleaning should be carried out every month before and during operation.
4.During winter, coil water should be drained out if not operating. If the unit needs to operate during winter time, make sure when the unit stops running, the coil water must circle the system and the fresh air damper must be closed to prevent coil freezing. If the unit stops operation for a long duration, coil water must be drained out.
5.Clean soft water must be used for chilled water and hot water system. Every year, wafer chemical treatment must be performed to eliminate the contamination in the system and apply compressed air or wafer for cleansing the fin coil surface, drain pan and U-trap bend.
6.Regular checking must be performed for the motor bearing lubrication condition and belt tightness.

Horizontal type air handling unit

Horizontal Type Air Handling Unit

Horizontal Type Air Handling Unit,Horizontal Type Fresh Air Handling Unit,Horizontal Vertical Type Air Handling Unit,Horizontal Type Air Handling Unit Equipments

Jinan Amrta Air Conditioning Co.,Ltd , https://www.amrtaac.com