Calibration is defined as follows: ‘The set of operations that establish, under specified conditions, the relationship between values of quantities indicated by a measuring instrument or measuring system and the corresponding values realized by standards.’ It is important to recognize at the outset the definition of a ‘calibration’ and to note that the ‘comparison’ applies only to the condition...

Open channel junction is one of the most common hydraulic structures that are used in various practical situations such as sewer, drainage, and flood control systems. Knowing the fluid flow behavior, is one of the most important topics in designing the efficient open channel junctions. The complexity and deviation of flow in the junction’s zone disrupts the proper functioning of the flowmeter d...

Permanent magnet metal flowmeters are implemented to monitor the flow of liquid coolant in a nuclear reactor, whose measurement accuracy plays significant role ensure safety and normal operation reactor. According theoretical analysis permanent flowmeter, several factors such as temperature, nonlinear degree, zero potential will affect measuring flow. However, for heavy-caliber influence magnet...

was compared with blood flow simultaneously determined by an electromagnetic flowmneter around the brachial artery before, during, and after intermittent isotonic grip exercise in eight subjects. The comparison of plethysmographic flow (y axis) with simultaneously measured flowmeter flow (x axis) yielded a correlation coefficient of 0.797, a slope of 1.15 and a y intercept of 9.62. When flow wa...

Flowmeter and Calibration Facility P.J. Lefebvre Naval Underwater Systems Center, Newport, R.1. An electromagnetic flowmeter was developed to measure transient flows at a data rate of 60 Hz. The approach taken was to develop suitable electronics to replace the electronics ofa commercially available electromagnetic flowmeter normally used W. W. Durgin for steady-state operation. Use of the comme...

The wide-range ejector flowmeter is an active scavenging system applying calibrated gas removal directly to the anaesthetic circuit. The evacuation rate can be adjusted on the flowmeter under visual control using the calibration scale ranging from 200 ml X min-1 to 151 X min-1. The accuracy of the calibration was tested on three ejector flowmeters at 12 different presettings. The percentage dev...

The application of elbow flowmeter in rotary equipments is beneficial to reduce the pipeline complexity. However, intervention centrifugal acceleration will lead change metrological characteristics flowmeter. Based on analysis differential pressure formation mechanism environmental flowmeter, calculation formula flow rate measurement with rotating state derived, and fitting method discharge coe...