Ultra-Safe Resistance Testing On Low-Current Explosive Devices
Designed with Fail-Safe Circuitry
The Alpha 4314 KRC Digital Igniter Tester is a portable digital ohmmeter which has been specifically designed for ultra-safe resistance testing on explosive devices (i.e. squibs, detonators). Countless critical military, aerospace, and industrial applications utilize squibs and other blasting agents, and it is vital that these devices detonate precisely when required – not sooner, not later, not while testing for continuity integrity. To guarantee both the readiness of the device and the safety of the technician or engineer, the Alpha 4314 KRC is equipped with redundant, dual fail-safe, current-limiting network circuitry that ensures 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 certify that this level of safety is included in your instrument, we simulate a worst-case component failure during final testing and include the resulting recorded output current flow with your order.
Accurate, Portable Precision
The Alpha 4314 KRC 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 rechargable NiMH (10Ah) pack for portability and line isolation purposes. An AC adaptor battery charger is standard. For added convenience and safety, the Alpha 4314 KRC 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 KRC 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.
Range Selection, Resolution, and Accuracy
While standard version of the Alpha 4314 KRC features 20, 200, 2k, and 20k Ohm ranges, it can be configured to meet your needs. The table below lists the nine possible ranges that can be installed in the Alpha 4314 KRC. When ordering, simply specify the four range numbers you want to be installed in your instrument.
The 20MΩ and 100MΩ ranges are only available on the standard current configuration.
|Rng #||Range||Resolution||Test Current||Fail-Safe Current||Test Current||Fail-Safe Current||Accuracy|
|0||2Ω||100µΩ||10mA||16mA||5mA||8mA||± 0.03% of reading ± 0.02% of range|
|1||20Ω||1mΩ||10mA||16mA||5mA||8mA||± 0.03% of reading ± 0.02% of range|
|2||200Ω||10mΩ||1mA||1.8mA||500μA||1.8mA||± 0.03% of reading ± 0.02% of range|
|3||2kΩ||100mΩ||100μA||180μA||50μA||180μA||± 0.03% of reading ± 0.02% of range|
|4||20kΩ||1Ω||10μA||18μA||5μA||18μA||± 0.03% of reading ± 0.02% of range|
|5||200kΩ||10Ω||1μA||1.8μA||500nA||1.8μA||± 0.05% of reading ± 0.05% of range|
|6||2MΩ||100Ω||100nA||180nA||50nA||180nA||± 1% of reading ± 0.2% of range|
|7||20MΩ||1kΩ||10nA||18nA||n/a||n/a||± 2% of reading ± 0.2% of range|
|8||200MΩ||10kΩ||1nA||1.8nA||n/a||n/a||± 3% of reading ± 1% of range|
|Alpha 4314||Alpha 4314 KRC Reduced|
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 KRC 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.
BCD (Binary Coded Decimal) Capability
For applications requiring data output the Alpha 4314 KRC KRC is available with a BCD interface, which does not interfere or change the fail-safe feature of the instrument.