FIELD: instrument making.
SUBSTANCE: method of diagnostics in process parameter transducer comprises the steps that follow. Process fluid parameter is measured to output control signal to two-wire process control circuit that depends upon measured process parameter. Process control two-wire circuit is connected with current measurement circuit. Note here that current measurement circuit is configured to measure current passing in process control two-wire circuit. Circuit of measuring voltage across terminals is connected to terminals of process parameter transducer. Circuit of measuring voltage across terminals is configured to measure voltage across terminals configured for connection with process control two-wire circuit. Diagnostics signal is received from said process control two-wire circuit to perform diagnostics thereof in response to said diagnostics signal. Note here that diagnostics is carried out using current measurement circuit and voltage measurement circuit. Besides, invention covers also the device for implementation of above described method.
EFFECT: lower probability of error transmission.
20 cl, 6 dwg
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