INDIA’S FIRST IN-HOUSE FULLY AUTOMATIC AIR VELOCITY CALIBRATION AS PER ISO 17025

Are you able to find a reliable manufacturer of Insertion Thermal Mass flow meter with an In-house calibration facility in INDIA?

Facing problem in validating/calibration of your existing Insertion Thermal Mass flow meter, or Air velocity Instruments?

THEN, THIS ARTICLE IS FOR YOU.

LEOMI has developed ways to optimize your existing air & gas flow measurement systems. LEOMI has newly commissioned India’s first in-house latest State-of-the-art Wind Tunnel, Made in Germany for Air Velocity Calibration and anemometer calibration services. It is certified as per ISO-17025 and DAkkS Germany traceability for air flow velocity ranges from 0.2 m/s to 75 m/s with flow uniformity of ±0.2%.

The wind tunnel is constructed according to the Göttinger-type is a Closed designed circular tunnel with 180mm Nozzle diameter with 320mm open working section. Göttinger-type may be operated optionally using a closed section of measurements. The design requires low blower power and silence than other Eiffel-type wind tunnels. 

 

Calibration and test in wind tunnel up to 75m/s

The wind tunnel is equipped with a precise flow calculation system that measures and control all functions as below:


  • the measurement of airflow velocity at the outlet of the nozzle with Prandtl-tube (high velocity) & thermal anemometer (low velocity)

  • Temperature, Relative humidity 

  • Barometric pressure


Flow calculation system uses multiple range differential pressure sensors for measurement of differential pressure across Prandtl type Pitot-static tube. The system uses a barometrical pressure sensor & temperature humidity sensor to calculate the actual density of the air. A special software (Lab View) uses these physical values to calculate the flow velocity at the outlet of the nozzle. For low velocity, a precise low-velocity thermal anemometer is used as a reference which is a switchover as velocity setpoints. The flow calculation system has a USB 2.0 interface to connect it to a computer.  

 

Leomi develops a proprietary calibration software 

 

With a wind tunnel flow calculation system, Leomi developed a customized LabView based calibration software that is capable of 

  • measuring all data from wind tunnel flow calculation system via TCP/IP

  • measuring required parameters from the test instrument (Leomi-586) under calibration 

  • recording system log of all wind tunnel parameters and test instrument

  • transfer calibration table to test instrument

  • preparing calibration protocol & printed 

  • customize for other instruments calibration and test

This customized software program is for controlling the wind tunnel and taking the measurement values of all sensors, included the calibrated sensor. All data will be completely recorded. Calculated data and status information will also be recorded. All relevant data are shown on the screen and add the calibrating curve. The calibrating is done completely under the control of this program. The curve in the following screenshot is the result of a calibration done completely without any influence of the user. After the calibration, the calculated data could be transferred to the calibrated unit. At last, after the calibration, a protocol will be printed.

LEOMI a registered #startupindia company by DPIIT Government of India, LEOMI has developed Insertion Thermal Mass (Calorimetric) Flowmeters in India by technology transfer agreement from founders of Softflow.de, Germany. This will greatly help India for its self-sufficiency in such technology demand against import substitutes. Support us by Being  “Vocal for Local”. 

We just don’t stop here, LEOMI provide support for Air Velocity calibration services of other manufacturer’s product of various types of Air Velocity Instruments such as Insertion Thermal Mass Flowmeter, Hot-wire / Vane Anemometer, L Type & S Type Pitot Tube, etc.

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