| 摘要 |
PURPOSE:To avoid the erroneous display of the depth of water caused by the offset change of the amplifying circuit incorporated in an exterior case generated by a clocking change in the timepiece. CONSTITUTION:Pressure memory data Da, Db of two different values necessary for a calculation formula for measuring the depth of water and an A/D conversion value Dc again taken under the same pressure of either one of the memory data after an amplifing circuit is incorporated in an exterior case are compared by a sensor data processing circuit 50 and the comparison result is displayed on a display device 6. The offset of the amplifying circuit can be confirmed in the state incorporated in the exterior case and can be simply calibrated. |
