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The current circuit of the type 4 to 20 milliamperes or 0 to 20 milliamps, equipped with a test circuit in parallel
The current circuit of the type 4 to 20 milliamperes or 0 to 20 milliamps, equipped with a test circuit in parallel
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机译：4至20毫安或0至20毫安类型的电流电路，并联装有测试电路
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摘要
Invention Patent: B "TYPE 4-20 MILIAMPERES OR 0-20 MILIAMPERES, COMPORTING A PARALELO TESTING CIRCUIT" D . Type 4 -20 milliampiliers or 0-20 milliampulators current circuit, with a parallel test circuit. The flow circuit of type 4 -20 milliampores or 0-20 milliampores connects an analog catcher (1) to an acquisition system (3),respectively passed through a stream of manifolds (Ic) and a current of acquisition (Ia). A test circuit is mounted in parallel to the current circuit to inject a superposition current (Is) into that circuit that supersedes the current of the collector (Ic) or the acquisition (Ia). According to a first mode of realisation, a variable voltage generator (7) injects the superposition current (Is) by addition to the acquisition current (Ia),this allows to control a low current limit of the acquisition system (3). According to a second mode of realization, a variable current regulator injects the superposition current (Is) by adding to the stream of the receiver (Ic),This allows to control a high current limit of the purchasing system. The low and high limits test of the purchasing system is done without opening the current circuit.
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