FIELD: measurement equipment.
SUBSTANCE: volume flow meter comprises the following components serially connected to an input channel: a summator, a flow meter of discharge flow and a flow divider, a device to compare flow rates and a flow indicator. At the same time upstream the summator for a back flow there is a pump connected with "pressure-flow" characteristic, connected with the device of flow comparison, and which is disconnected by its signal.
EFFECT: expanded range of flow rate measurement, reduced error and possibility to receive various functional connection between values of discharge and back flows of medium.
2 cl, 3 dwg
