Exact Flow”s Flow Gator calibrator features an extended-range, dual-manifold capability. Utilizing a two-meter manifold control system, this portable, automated flow transfer standard operates in single viscosity fluids from 0.1 to 310 GPM (over 3000:1). Calibrations in multiple viscosities can be achieved from 0.35 to 310 GPM (886:1 turndown). Instead of removing flowmeters from service for recalibration, the Flow Gator flow transfer standard allows users to bring the calibrator to the flowmeter. This field flow calibrator is intended for in-line calibration and validation of meters using the actual process liquid. It is compatible with any meter with an electronic output or visual indicator. The calibrator incorporates hand-held
electronics, thus eliminating the need to carry a laptop computer into
the field. Two dual-rotor turbine flowmeters, which provide repeatability of +/-0.02 percent, enable the Flow Transfer Standard system uncertainty to be <+/-0.25 percent of reading. The calibrator automatically selects the appropriate master meter, based on the current flowrate. Flow conditioners are built into the manifold, as well as the temperature sensor. The calibrator reads signals from the master meters, the flowmeter under test and a fluid temperature sensor. The embedded flow computers process these signals to enable viscosity compensation, linearization and processing of the UUT output.