Figure 20. Testing for continuity using the M51 blasting cap test set.
Test Electric Blasting Caps. Test the electric blasting caps using the steps that follow.
Place the blasting cap under a sandbag.
Uncoil or unfold the blasting cap lead wires.
If using the galvanometer, touch one cap lead wire to one galvanometer post and the other lead wire to the
other post. If the galvanometer's needle deflects widely, the cap is satisfactory. See Figure 21.
If using the M51 blasting cap test set, attach one cap lead wire to one binding post. Tie the other lead wire to
the other post and squeeze the test set handle. The blasting cap is satisfactory if the indicator lamp flashes.
See Figure 21.
Figure 21. Testing electric blasting cap.