TM 9-1375-213-12
as far as possible from operator and pointing
(c) Touch one cap lead wire to one galva-
nometers post and other cap lead wire to other
away from him (i.e., blasting cap leg wires are
toward operator). Make sure cap is pointed away
post. If galvanometers needle deflects slightly
less than it did when instrument was tested ( (a)
from other personnel and caps.
above), blasting cap is satisfactory; if not, cap
WARNING
is defective and should not be used.
When uncoiling cap lead wires, the cap will
not be held directly in the hand, but will be
NOTE
held by the wires approximately one inch
If battery is no good condition, galva-
from the cap. Lead wires should be
nometers should read 25 units when in-
straightened out as far as necessary by
strument is tested and about 24 units
hand and shall not be thrown, waved
when a good blasting cap is tested.
through the air, or snapped as a whip to
loosen wire coils.
(1) When using blasting cap tests set M51:
c. Testing Series Circurts.
(a) Check test set as described in a. (1)
(a) above.
(either method).
( 2 ) When usingblasting cap test M51,
6) from
lead wires of
electric blasting cap.
connect free ends of blasting cap lead wires to
(c) Attach lead wires to posts.
test set binding posts. Indicator lamp should
(d) Squeeze test set handle. If indicator
flash when test set is functioned.
lamp flashes, blasting cap is satisfactory. If it
(3) When using galvanometers, touch blast-
does not flash, cap is defective and should not be
ing cap lead wires to galvanometers posts. This
used.
should cause a wide deflection of needle. If no
(2) When using blasting galvanometer:
wide deflection occurs, circuit is defective.
(a) Check galvanometers as described in
d. Testing Entire Circuit.
a(2) (a) above.
(1) Splice firing wires to series circuit and
move to firing position.
6) from
lead wires of
electric blasting cap.
Change 8