Blasting Machine with Digital Ohmmeter
Blasting machine MARS-3 is designed to explode electric detonators and control the electric resistance of a successive switch blasting line in a safe manner.
The integrated ohmmeter measures the detonator line resistance to identify short circuits, breaks in the blasting line or circuits with excessive resistance prior to the blast. For safety reasons, the line tester current is limited to 1mA. Three digit LED display helps to safely control the blasting line of the electric detonators.
MARS-3 includes output pulse tail cutting to limit the output pulse to 4ms and quench the remaining capacitor charge. These safety features are necessary to eliminate potential secondary explosions of the flammable dust generated during the blast.
MARS-3 can be used to explode class C1, C2 and C3 sensitivity electric detonators. For C1 detonators the total line resistance can be up to 450Ω.
The electric unit and the batteries are housed in a plastic body. The ohmmeter display, membrane switches, low battery indicator and capacitor loading signal lamps are on the front panel of the device The connection terminals for the blasting line are on the top.
Features and Benefits
Built-in ohmmeter with digital 0-999Ω reader
Battery level indicator LED
Short 4ms output pulse
Line resistance, max
450 (for class C1 detonators)
180 (for class C2 detonators)
36 (for class C3 detonators)
Firing impulse duration
8 - 15 (depends on battery)
Capacity (in 2.5Ω caps approx.)
Blasts per battery change
500 - 1000 (depends on battery)
Line resistance testing
digital ohmmeter up to 999
Testing current (max)
3 x 1.5V AA batteries
Protection level of machine body
–15 to + 50 at 100 % relative humidity
0.34 (with batteries)
170 x 88 x 33