Figure 4-13. M60 weatherproof fuse igniter.

TM 9-1300-277

Figure 4-13. M60 weatherproof fuse igniter.

4-5. DEMOLITION EQUIPMENT

a. Circuit Testers.

(1) Blasting galvanometer (fig. 4-18). The

blasting galvanometer is an instrument used in testing

the electric firing systems to check the continuity of the

Figure 4-14. M1 flash-vented electric squib.

circuit (the blasting cap, firing wire, wire connections and

splices). Its components include a D'Arsonval meter

and a small, special silver-chloride battery. Where the

c. Connector, detonating cord (fig. 4-17). This

meter is connected to a closed (continuous) circuit, the

connector is cylindrical and is composed of either white

flow of current from the battery moves the meter needle

or blue plastic molding material. It is 1.72 inches long

across the scale. The extent of the needle's deflection

by 0.62 inch diameter with a 0.12 inch diameter hole

is in proportion to the amount of resistance in the closed

located through the body of the connector. Also, two

circuit (and on the strengths of the battery). Two types

65slots are located on the same end as the holes and

of batteries are authorized for use, one for temperature

aid in easy installation of the detonating cord. The

above 0 , and the other for temperatures below 0

detonating cord connector is used to connect two

strands of detonating cord. Connections are made more

quickly with the connector than with knots.

Change 1

4-13