Nagman have recently launched a Traceable Flow Meter Calibration Laboratory at Mumbai to calibrate liquid flow meters of flow sizes (DN 15 upto DN 250) with enhanced system features and facilities. This laboratory is capable of calibrating a variety of flow meters, viz., Turbine, Coriolis Mass, Electro-magnetic, Ultrasonic, Vortex, Positive Displacement, Variable Area, Water Meters, etc., typically in sizes from DN 15 to DN 250 through Gravimetric (calibration through comparison methods also are achievable). 

The system’s pump house accommodates an array of pumps with frequency converters (VFDs) which control the complete water circulation between the storage reservoir and collection tanks.

The system’s test bed has three test lines to accommodate/mount ‘Units Under Test’ (UUT). each test line is fitted with a calibrated and certified ‘electromagnetic’ flow meter which serves as flow setting device (Masters). One or more of flow meters (UUTs), depending on the size and types of flow meters, can be mounted and calibrated at a time.

Three steel tanks of nominal volumes from 150 to 6,000 ltr are mounted on matching weighing scales/ load cells. Pressure measurements devices are installed at both upstream/downstream of the test line to measure the inlet/outlet pressure of water. Temperature sensors with transmitters are fitted in each collection/weighing tanks to measure the temperature of water collected.

The speciality of the system is its open type flow diverter system that enables diversion of flow into collection tanks or to water reservoir per flying start/stop operation without disturbing the flow rate. Precise flow control is achieved through employing VFDs (connected to pumps/PLCs) and electrically operated flow control valves.

The system’s control panel is designed in such a way to perform multiple tasks and to mount the weighing indicators and multiple control switches/knobs etc. The control console is also equipped with a PC with software – to handle/operate the process and display the parameters like flow rate/total volume, temperature and pressure readings. The control console is equipped with precise PLC system to take care of the automation process of the system and is loaded with in- house designed “FLOCAL” software which generates the calibration report.

Salient Features:

• 2 Modes of Calibration (Comparison and Gravimetric)

• Semi-automatic/Automatic operation

• CMC/Uncertainty (Comparison 0.25%/Gravimetric 0.1%), and

• Media: Water (correction factors for other process liquids).

Nagman Calibration Services LLP, Mumbai. Tel: 022-65138885. Mobile: 91-98679-12755. Email: cfcmumbai@nagman.com, stephen@nagman.com