| 摘要 |
PROBLEM TO BE SOLVED: To realize a differential pressure transmitter having composite functions as temperature correction by putting a low-power temperature conversion circuit which can be operated with a single power source and building it into a circuit of a two-wire differential pressure transmitter. SOLUTION: A bias resistor 13 is further added in series to a resistance bulb 6 and a reference resistor 7, a constant current is made to flow to these series circuits, and a resistance value of the bias resistor 13 is appropriately selected. Thus in-phase voltage of a signal is set within an operation input range of an operational amplifier for acquiring signals. |
