The Valhalla Scientific 4314A Digital Igniter Tester is a portable, four-wire Kelvin resistance meter engineered for safe, accurate testing of explosive devices and volatile components. This specialized ohmmeter delivers precision resistance measurements for igniters, fuses, squibs, explosive bolts, and airbag initiators while maintaining strict current limiting to prevent component ignition. Dual fail-safe current-limiting circuitry ensures test currents never exceed specified thresholds, even under worst-case failure conditions.
Technical Specifications
• Measurement Type: Resistance (Ohmmeter)
• Display: 4½-digit LED, 20,000 counts (0–19999)
• Conversion Rate: ~3 measurements per second
• Ranges: Configurable selection of 4 from 9 available ranges (2Ω to 200MΩ)
• Resolution: Down to 1 mΩ or 100 µΩ depending on range
• Accuracy: ±0.02% of reading ±0.02% of range (lower ranges); ±0.05% to ±3% of reading (higher ranges); Temperature coefficient ±0.002% per °C (0–15°C and 35–50°C)
• Input Configuration: Four-wire Kelvin eliminates lead wire and contact resistance errors
• Test Currents (Standard/KRC options): 10 mA/5 mA (2Ω, 20Ω); 1 mA/500 µA (200Ω); 100 µA/50 µA (2 kΩ); 10 µA/5 µA (20 kΩ); 1 µA/500 nA (200 kΩ); 100 nA/50 nA (2 MΩ); 10 nA/n/a (20 MΩ); 1 nA/n/a (200 MΩ)
• Current Limiting (Standard): 16 mA maximum
• Current Limiting (KRC Reduced): 8 mA maximum
• Maximum Input: 250 VDC or peak AC without damage
• Overload Indication: Display flashes
• NIST Traceability: Certificate included
– Key Features
• Certified safe for explosive and volatile atmospheres (MIL-Std 810 Method 511)
• Complies with EWR 127-1, Section 3.13.8.1-2
• U.S. Government Safety Board and Armed Forces approved
• Redundant fail-safe current limiting for intrinsically safe operation
• Rechargeable battery (nickel-cadmium or D-cell NiMH)
• Standard AC adapter charger (115 VAC to 6 VDC, 300 mA)
– Typical Applications
• Explosive device resistance testing
• Initiator and squib continuity verification
• Airbag system igniter qualification
• Military ordnance assembly inspection
• Pyrotechnic safety validation
– Compatibility & Integration
Configurable range selection accommodates diverse test protocols. Standard configurations typically include 2Ω, 20Ω, 200Ω, and 2 kΩ ranges. KRC (Reduced Current) option available for applications requiring lower test currents.
