Low-Resistance Igniter Tester

Model 4314 Low Ohms

Low-Resistance Igniter Tester
4314 Low Ohms Low-Resistance Igniter Tester Back View
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  • Ultra-Safe Resistance Measurements
  • Ultra Fail Safe Circuitry Limits Current
  • 2 Ohm Range for Low Resistance Applications
  • 100µΩ Resolution to 2kΩ- 4 Ranges
  • Rechargeable Battery Operated
  • Safe Tester for Explosive Devices
  • Safety Approval by US Government/Military
  • Certificate of N.I.S.T. traceability included at no extra charge
  • Now Available with RS-232 Interface


  • Carrying Case
  • 19″ Rack Mount Adaptor

Test Leads:

  • K – Kelvin Lead Set (Alligator Clips)
  • KK – Heavy – Duty Leat Set (Alligator Clips)
  • C – Banana-Clip Cable
  • MP-1 – Kelvin Micro-Probes (Needle)
  • MP-2 – Kelvin Mini-Probes (Needle)
  • MP-S – Single Pointed Probes (Needle)
  • MP-4 – 1″dia Surface Probes
  • MP-5 – 0.5″dia Surface Probes
  • BBL – Banana-to-Banana Cables

Ultra-Safe Low-Resistance Testing

The Alpha 4314 Low Ohms Digital Igniter Tester is a portable digital ohmmeter which has been specifically designed for ultra-safe low resistance testing on explosive devices (i.e. squibs, detonators). This is the first model of the 4314 Series Igniter Testers that features a 2Ohm Range with a resolution of 100uA without compromising the Low Fail Safe and Test Currents. This Model was especially designed to replace the Model 4650A no longer in production. Many versions of the 4314 series have had the unit’s circuitry reviewed and approved by a U.S. Government Safety Board as well as most branches of the armed forces for specific military programs (i.e. Cruise Missile).

Designed with Life Protecting Safety in Mind

There are a variety of critical military, aerospace and industrial applications which utilize squibs and other blasting devices. In each case, it is extremely important that these devices detonate when required. It is equally important that these devices do not detonate while being tested for continuity integrity. To this end, Valhalla equips each instrument with redundant, dual fail-safe current limiting network circuitry to insure that the instrument test currents cannot exceed the specified amount. Even in the unlikely event of a worst case component failure, the output current limiting network is still in effect. To prove that this level of safety is intact in every unit we ship, a worst case component failure is simulated during final test with the resulting output current flow is recorded and that data is attached to the unit.

The Alpha 4314 Low Ohms utilizes a four-wire Kelvin input configuration to eliminate lead wire length and lead contact resistance errors. The units are battery powered with a heavy duty rechargeable Ni-Cad pack for portability and line isolation purposes. An AC adaptor battery charger is standard. For added convenience and safety, the Alpha 4314 feature an internal switching configuration which automatically disables the battery charging circuit when in the operate mode. Alternately, all power is removed from the output circuitry when in the off/charging mode.


As with all Valhalla Digital Ohmmeters and Igniter Testers, the Alpha 4314 is available with a host of 4-wire probes and cable sets. Consult the end of this section for complete information on Options and Accessories.

RS-232 Serial Interface Capability (NEW)

The interface is isolated to 2.5kV on both power and Data lines and uses iCoupler Technology. Option RS-232 provides a safe way to communicate with the Alpha 4314 via a computer or PLC and allows the transfer of single readings or continuous transmission of data. This interface is for data acquisition only and does not provide range control. See Datasheet for more details. Option RS-232 Data Sheet

Range Specifications

Range (ohms)





Resolution (ohms)





Test Current (A)





FailSafe Current (A)





General Specifications:

Accuracy: (180 days 25°C ± 10°C)
±0.03% of reading ±0.02% of range
Display: 4 1/2 digit (19999) L.E.D. – 20,000 counts
Terminal Configuration: Four-wire Kelvin
Overload Indication: Display flashes
Operating Temperature Range: 0°C to 50°C
Temperature Coefficient: ±.002% per °C (from 0°C to 15°C and 35°C to 50°C)
Conversion Rate: 3 per second
Batteries: Rechargeable NiMH (10Ah)
Charger: 115-230 VAC 50-60 Hz to 5.9V @ 1.25A
Size: 27cm/11″ D x 9.5cm/24″ W x 8cm/3″ H
Weight: 1.3 KG/3lbs NET 3 KG/6 lbs shipping