Dosimeters and Radiation Detectors
Dosimeters and Radiation Detectors
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MARS-3
Blasting Machine with Digital Ohmmeter
Blasting machine MARS-3 is designed for blasting electric detonators and safety control of the electric resistance of blasting line.
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. 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 indication
Short 4ms output pulse
Technical Specifications
Metric
Units
Value
Line resistance, max
Ω
450 (for class C1 detonators)
Ω
180 (for class C2 detonators)
Ω
36 (for class C3 detonators)
Firing voltage
V
500
Firing energy
J
8.5
Firing impulse duration
ms
3.1-3.9
Capacitor charging
s
8 - 15 (depends on battery)
Capacitor rating
μF
68
Capacity (for 2 Ω C1 class caps, approx.)
caps
220
Blasts per battery change
blasts
500 - 1000 (depends on battery)
Line resistance testing
Ω
digital ohmmeter up to 999
Testing current (max)
mA
1
Power supply
V
3 x 1.5V AA batteries
Protection level of machine body
IP67
Operating temperature
°C
–25 to +50 at 100 % relative humidity
Weight
kg
0.34 (with batteries)
Dimensions
mm
170 x 88 x 33