A)Micro Ultrasonic LCD Display Gas Flow Meter
GFM-100
GFM-100 type Micro ultrasonic gas f low meter case using aluminum alloy die casting, the plastic made of high strength plastic molding and processing.
This high quality materials and rational structure design to ensure that the product in the long-term work conditions, still can reach the target.
Advanced micro ultrasonic principles through the change of piezoelectric sensor airflow, with high quality microprocessor calculation, therefore, is the ideal gas industry measuring instruments.
GFM-100 type micro ultrasound gas flow meter is suitable for natural gas, liquefied petroleum gas (LPG), Methane and clean gas measurement.
Structure:
This product is in order to meet the market demand introduction of acoustic technology products, principle for air through aluminum alloy recessed, produce the vortex flow, its through the film piezoelectric patches, the vibration of the voltage signal, the voltage signal amplified, plastic and flow generation after proportional to the pulse signal.
The monolithic integrated circuit to the pulse signal measurement and analysis, the conversion of the volume of a gas, single-chip microcomputer and the display and storage.
Installation:
- Before installation should read carefully the instructions, should by professional department of qualified for installation, and should comply with GB 50028-93 town gas design the requirement of the specifications.
- According to the pipeline position choice left or right entrance to the entry of the gas meter, mount transition joint according to the airflow direction in entering a pipeline connection.
- In the installation , storage and handling , banned m the cart before the horse and broke touch of strong earthquake and table cover may not arbitrarily open , prevent water , sundry into
- After the completion of installation must be filled with 5 Kpa+ /-0.5 Kpa
Air (or other reliable method)to air tightness inspection and confirm the rear can put into use)
Testing methods and requirements:
Testing methods
Table pulse output port such as above, the output using universal headphones plug , its for three terminal , the intermediate not pick up, the signal is every 0.1 liters output a low pulse , the width of about 10 milliseconds, the ground for signal public end,
Signal for nmos type signal , high weakness, low powerful, drawing as following ; testing equipment sonic nozzle, measureable flow point 1.6,0.32,0.04
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