Abstract: A method for the validation of a fuse head in an electronic detonator is disclosed, the method including measuring at least once a first charge time; activating a switching means to a second position to replace a reference resistor in an RC circuit with the fuse head; measuring at least once a second charge time; and determining the deviation of the second charge time from the first charge time.

Abstract: There is provided an electronic detonator with electronic delayer, comprising: —a conductive shell comprising —an open end for receiving elements such as an explosive charge, and —a closed end, and —a printed circuit board (PCB) comprising the electronic circuit of the delayer, the printed circuit board being placed inside the conductive shell, characterized in that the electronic detonator further comprises at least a resilient, compressible and conductive gasket —positioned by the open end in a space defined by the PCB and an inner surface of the conductive shell, —filling at least part of the space between the PCB and the inner surface of the conductive shell, such that protection against electromagnetic interferences (EMI) is allowed and —contacting the ground connection of the PCB and the inner surface of the conductive shell such that acts as connection path for grounding the PCB, allowing protection against electro-static interference (ESD).

Abstract: There is provided an electronic detonator with electronic delayer, comprising: —a conductive shell comprising —an open end for receiving elements such as an explosive charge, and —a closed end, and —a printed circuit board (PCB) comprising the electronic circuit of the delayer, the printed circuit board being placed inside the conductive shell, characterized in that the electronic detonator further comprises at least a resilient, compressible and conductive gasket —positioned by the open end in a space defined by the PCB and an inner surface of the conductive shell, —filling at least part of the space between the PCB and the inner surface of the conductive shell, such that protection against electromagnetic interferences (EMI) is allowed and —contacting the ground connection of the PCB and the inner surface of the conductive shell such that acts as connection path for grounding the PCB, allowing protection against electro-static interference (ESD).

Abstract: Method for the validation of a fuse head in an electronic detonator, wherein said detonator comprises: a reference resistor, a fuse head, at least one capacitor and switching means, wherein in a first position of the switching means, the reference resistor is connected to the at least one capacitor forming a first RC circuit, and in a second position of the switching means, the fuse head is connected to the at least one capacitor forming a second RC circuit; the method comprising the following steps: measuring at least once a first charge time; activating the switching means to the second position to replace the reference resistor in the RC circuit with the fuse head; measuring at least once a second charge time; and determining the deviation of the second charge time from the first charge time.

Abstract: A firing system comprising an electronic initiator, and a blasting unit connected to and capable to initiate the electronic initiator, wherein the electronic initiator comprises an external housing made of plastics, an explosive charge, a fuse head and an electronic delay element, the external housing comprising an inner cavity and retaining means adapted to retain at least one shock tube, the explosive charge, the fuse head and the electronic delay element being located in the inner cavity of the external housing, the explosive charge being located at a closed end of the inner cavity, at a position such that the explosive charge is capable to ignite the shock tubes retained by the retaining means in a use situation of the electronic initiator, the fuse head and the explosive charge being located relative to each other such that the fuse head is capable to ignite the explosive charge, and the electronic delay element being connected to the fuse head and being configured to initiate it.