TM9-1375-213-12
When the handle of the test set is depressed, a minute
open or contains a high resistance, no current (or a
amount of current flows from the generator, through
very small amount) flows and the switching circuit is
the blasting circuit, and through a switching circuit. If
not actuated. The test set may be issued in lieu of the
the blasting circuit is continuous and has less than 200
blasting galvanometers, both as a component of demoli-
ohms resistance, the current can flow through the
tion kits or as a separate item of issue.
f. Box, Blasting Cap. Specially designed empty
blasting circuit and actuate the switching circuit,
which lights the indicator lamp. The indicator lamp
boxes of 10-cap capacity are provided for blasting dem-
will also light if circuit is shorted since a short circuit
olition kits. These boxes consist of rectangu-
is, in fact, a continuous circuit. If the blasting circuit is
Figure 1-41. Blasting circuit test instruments
Change 5
