Takeyoshi Hamabe, president and CEO for NTK International (right), shakes hands with

Mark Oehrlein, CFO for COX Instruments, at a ceremony for the new NTP/Cox flowmeter calibration rig in Tokyo.

COX Instruments (www.cox-instruments.com), a supplier of flow measurement instrumentation, opened a primary standard flowmeter calibration center in Tokyo, Japan. Operated under an agreement with NTK International Corporation (www.ntkinternational.com), the lab is designed to provide primary standard NIST-traceable liquid calibrations for all types of flow measurement devices, ranging from 0.01 to 300 GPM in fluids from 0.5 to 100 centistokes.

Common flowmeters calibrated at the new calibration center include:

turbine, positive displacement, Venturi/nozzle, rotameter, orifice-plate, Coriolis, ultrasonic, vortex and variable area. The facility offers liquid flowmeter calibration services for end-users and OEM production.

The calibration center verifies flowmeter accuracy by comparing the meter-under-test with a primary flow standard traceable to a recognized international standard, such as the U.S. National Institute of Standards and Technology (NIST, www.nist.gov). The calibration service team takes into account key factors affecting flowmeter performance, such as orientation of the meter, operating temperature and pressure, and flow medium and viscosity.

The calibration service center utilizes advanced Flow Dynamics (www.flow-dynamics.com) PDCL-10 and PDCL-300 primary standard flow calibrators with an uncertainty of ±0.05% of reading. The positive-displacement calibrators precisely control the flow of liquid passing through the flowmeter-under-test, while monitoring fluid temperature.