Patent ID: 9715949
Date: 2017-07-25
CPC Classifications: G01T,G21C,G21D,Y02E

Claim:
1. A radiation monitor comprising: a shutter installed between a check radiation source and a radiation detector; a calculation section which calculates a radiation dose from a detection signal outputted by said radiation detector; an AC solenoid to be operated by an AC power source; a temperature switch which is attached to said AC solenoid and whose contact is reversed from an opened state to a closed state when temperature thereof is equal to or more than a set value; a circuit protector which has a contact and is connected in series to said AC solenoid; and a mode selection switch connected in series to said AC solenoid, wherein said shutter is maintained in a closed state when said mode selection switch is set to a normal mode; said mode selection switch is changed from the normal mode to a check radiation source mode, thereby flowing an AC current through said AC solenoid to change said shutter from the closed state to an opened state; and the contact of said temperature switch is reversed from the opened state to the closed state, thereby disconnecting the contact of said circuit protector to interrupt the AC current that flows through said AC solenoid.