IGNITER CIRCUIT TESTERS
 Measure Resistance of Explosive Devices

Model 101-5HJ-NAV with test leads

Documentation

Product Literature:  Igniter Circuit Testers Product Sheet  Igniter Circuit Testers Specifications Technical Article: Theory of Operation

Typical Applications

Missiles and bombs: • Missiles Squib circuits • Detonators • Fuzes in sensor-fuzed weapons • Fuzes in missile simulators and targets Mining: • Blasting caps, explosive primers Automotive: • Airbag squib circuit • Belt pretensioner circuit Aircrafts: • Squib circuit ground studs of the engine fire extinguisher bottles • Resistance of pressure cartridge of escape slides Pyrotechnic: • Pyro-firing initiator • Explosive bolts

PRODUCT OVERVIEW

From checking missile fuzes to testing airbag squib circuits, Space Electronics' 101-5HJ series of fail-safe circuit testers can measure resistances with great accuracy while dramatically reducing the risks of accidental detonations because of their built-in fail-safe modules.

Our igniter circuit testers are specialized fail-safe ohmmeters that measure the resistance of electro-explosive circuits, using a test current which is a 1000 times less than a conventional precision low resistance ohmmeter.

Our 101-5HJ-NAV tester is a direct replacement for the discontinued Alinco 101 tester. Our tester overcomes the defects that made the Alinco 101 unsafe.

KEY BENEFITS

• Fail-safe module limits test current. Since excessive test current could cause bodily injury or death, protection for all modes of failure or operator error is built into the tester. A sealed, tamperproof, fail-safe module guarantees that the test current will be less than 10 mA even under worst case conditions of simultaneous failure of multiple circuit elements.

• Ease of operation - Direct reading. No need to balance bridge or subtract test lead resistance. The 4-wire test leads, which automatically compensate for lead resistance, are attached to the igniter circuit and the appropriate range button is depressed.  The digital LCD readout then displays resistance.

• 0.001 ohm resolution. A milliammeter and three built-in precision resistors permit verification of test current and accuracy.

• Genuine Portability - These testers are housed in a small "military" type case with a carrying handle and space for storage of test leads.

APPROVAL

Our igniter circuit testers have been approved by the US Navy for measurement of munitions and rocket motor igniters.

WHY MEASURE?

Measuring igniter circuits is necessary to make sure that the circuit will work when it is needed:
• For the military, it is critical to avoid duds (unexploded ordnance) which could be turned by the enemy into IED (improvised explosive devices).
• In an aircraft, the critical items that need to work when ignited are the fire extinguishers (in case of an engine fire) and the emergency slides.
• In an automobile, airbags and seat belt pretensioners need to work 100% of the time in case of an accident.

PHYSICAL SPECIFICATIONS

For all testers:
• Terminal Configuration: 4 wire (Kelvin)
• Power: Rechargeable internal battery
• Temperature Range: 0 - 50^oC
• Size: 20 cm. wide X 18 cm. deep X 22 cm. high
• Weight: 1.5 Kg
• Case: "Military" type with handle and cable storage