Abstract: A flowmeter test system that tests a test target flowmeter by flowing fluid through the test target flowmeter and measuring the fluid having flowed through the test target flowmeter by a measurement part different from the test target flowmeter is disclosed. The flowmeter test system includes, a storage part to store the fluid, a distribution flow path to distribute the fluid between the storage part and the test target flowmeter, a measurement part introduction path to be connected to the distribution flow path and introduce the fluid into the measurement part, and a flow path switching part to switch between the distribution flow path and the measurement part introduction path. A pressure loss in a flow path from the flow path switching part to the storage part and a pressure loss in a flow path from the flow path switching part to the measurement part are same.

Abstract: A testing method for testing a liquid flowmeter, the method including introducing a test liquid and a sealant having a specific gravity smaller than that of the test liquid into a weighing tank until an outlet of a pipe is submerged in the test liquid; causing the test liquid to pass through the pipe; acquiring readings of a weighing scale configured to measure a weight of the weighing tank at multiple time points, and time information representing the time points; acquiring readings of the liquid flowmeter; calculating a standard flow rate of the test liquid based on the readings of the weighing scale at the multiple time points and the time information; and calculating an instrumental error between a measured flow rate based on the readings of the liquid flowmeter and the standard flow rate.

Abstract: A method and device for determining the flow rate of a flowing medium according to the plummet principle is characterized by a simplified determination of the calibration data sets in that at least one set of calibration data is recorded with at least one reference medium under at least one reference measurement condition. Then, a position of a plummet which is dependent on the flowing medium is determined under a measurement condition which differs from the reference condition. Here, the set of calibration data is converted from the reference measurement condition to the measurement condition, and from a determined position of the plummet, a measure for the flow rate of the medium is then determined.

Abstract: Systems and methods that improve farmers' ability to measure quantities of dry agricultural materials and rates of change of those quantities are disclosed. Also disclosed are systems and methods to rapidly and effectively communicate materials quantities and rates between farm equipment operators.

Abstract: A method of determining a flow rate of a pump involves determining a volume capacity for a flow line carrying produced fluids from the pump, determining a starting pressure for the flow line and setting an arbitrary target pressure for the purpose of testing. The test is initiated by preventing flow in the flow line while continuing to operate the pump and monitoring pressure in the flow line to determine a time interval required to reach the target pressure. The method then involves performing calculations to determine flow rate using the volume capacity, the starting pressure, the change in pressure over the time interval required to reach the target pressure. The flow rate is equivalent to ?V divided by a change in time ?T. The method is preferably used as part of a manual or automated pump control strategy to keep the pump operating within flow rate ranges that provide optimum pump efficiency.

Abstract: A gas flow stand (200) is provided according to an embodiment of the invention. The gas flow stand (200) includes a weighing device (210) and a meter under test (203) positioned on the weighing device (210). The gas flow stand (200) further includes a gas source (201) positioned on the weighing device (210) and conduit (205) connecting the gas source (201) and the meter under test (203). The weighing device (210) generates a weight measurement for the meter under test (203), the gas source (201), and the conduit (205).

Abstract: A system and method is provided for remotely and automatically calibrating a mass-flow sensor in a yield monitor of a combine. The invention uses a wireless communication device installed on a combine and a remote wireless communication device installed on a grain carrier or truck carrier. Once an actual weight is obtained, calibration information is sent to the combine to calibrate the mass-flow sensor.

Abstract: A calibration rig for calibration and/or re-calibration of flow meters (5) and/or flow meter calibration carts (7) is described comprising: a source (1) of pure sterilized water or a source (40) of a sterile conductive solution, a piping manifold (3) connected to the source (1), at least one flow meter (5) connected to the source (1) via the piping manifold (3) and/or at least one flow meter calibration cart (7) connected to the source (1) via the piping manifold (3) and a drain pipe (23) connected to each flow meter (5) and to each flow meter calibration cart (7) to guide liquid from the flow meter (5) and/or the flow meter calibration cart (7) to a drain (23).

Abstract: A gas flow stand (200) is provided according to an embodiment of the invention. The gas flow stand (200) includes a weighing device (210) and a meter under test (203) positioned on the weighing device (210). The gas flow stand (200) further includes a gas source (201) positioned on the weighing device (210) and conduit (205) connecting the gas source (201) and the meter under test (203). The weighing device (210) generates a weight measurement for the meter under test (203), the gas source (201), and the conduit (205).

Abstract: A calibration rig for calibration and/or re-calibration of flow meters (5) and/or flow meter calibration carts (7) is described comprising: a source (1) of pure sterilized water or a source (40) of a sterile conductive solution, a piping manifold (3) connected to the source (1), at least one flow meter (5) connected to the source (1) via the piping manifold (3) and/or at least one flow meter calibration cart (7) connected to the source (1) via the piping manifold (3) and a drain pipe (23) connected to each flow meter (5) and to each flow meter calibration cart (7) to guide liquid from the flow meter (5) and/or the flow meter calibration cart (7) to a drain (23).

Abstract: A control system for controlling a variable of a device by an end element is disclosed. The control system has as its input a magnetostrictive position sensing probe for measuring the value of the variable of the device at time intervals and a digital controller reading the value from the magnetostrictive position sensing probe and having an output and means for calculating control output from the updated value of the variable during the time interval. The digital controller is close coupled to the magnetostrictive position sensing probe to permit time intervals that are very short, such as 500 microseconds to 1 millisecond.

Abstract: A mass flow sensor apparatus (30) for a billet harvester(10) for sugar cane of the type having an elevator (20) with a plurality of flights (24) that transfer batches of billets (5) through an elevator housing and having a floor section (23) proximate an upper end (22) of the elevator housing, the mass flow sensor apparatus including: a weigh pad (31) for receiving batches of billets (5); a first transducer means (34) operatively associated with the weigh pad for producing mass signals (39) indicative of a mass received by the weigh pad and error correction mechanism (37, 38) for correction of measurement errors in the mass signals; whereby, in use, the weigh pad (31) is substantially co-planar with the floor section (23) in the elevator housing such that batches of billets (5) traverse the weigh pad and the error correction mechanism (37) is operatively associated with the crop harvester (10). A yield mapping system employing DGPS positioning techniques with the mass flow rate sensor is also disclosed.

Abstract: A ball type flowmeter having an external transparent housing on which a flow rate scale is pre-printed, and contained in the housing is a transparent tube having a floating ball, the tube being slidable in the housing and having upper and lower flanges to be moved into and then fixed at a position at which the ball indicates the flow rate of a test gas.