Hand Cranked Blasting Machine with Line Continuity Tester
ERNA-3 is a medium energy hand cranked blasting machine that comes with a built-in line continuity tester. It uses a hand generator and the operator does not need an external power supply or batteries. The blasting machine is portable, compact and lightweight, and can easily be operated by a single person.
The integrated line tester verifies the line’s integrity and uses a two color LED that indicates to the user whether the resistance of the line and detonators is below or above 380 Ω. For safety reasons, the line tester current is limited to 1 mA.
The device comes in an aluminum enclosure and includes ON or OFF/L-test switch, terminals for connecting the electric detonator line, red/green LED for line testing and a crank handle for capacitor charging. Both sides of the panel include READY LEDs to indicate the capacitor charge state.
Features and Benefits
Medium energy blasting machine
Built-in line tester with two color LED
Maximum permitted line resistance
9 - 11 crank turns
Capacitor nominal value
Capacity (2.5Ω, 1. class detonators)
Two-color LED, testing point 380Ω
Maximum line testing current
–25 to + 55, at 100% relative humidity
142 x 125 x 45