The RP-97 Exploding Foil Initiator (EFI) is a medium cost detonator designed for applications where an EBW detonator is not acceptable.

RP-97 FIRING PARAMETERS

Threshold Voltage	Approx. 1350 volts with 0.25 µFD Capacitor
Threshold Voltage Std. Deviation	50 volts maximum
Function Time	Approx. 1.06 µsec.

Caution: While EBW and EFI Initiators are inherently less susceptible to accidental detonation during handling and set-up than devices containing primary explosives, electrical and electronic firing systems are sensitive to transient electrical energies which could cause premature triggering or firing. The blasting area must be clear of personnel and equipment before the detonator leads are connected to any RISI Firing System. Only approved RISI Firing Systems should ever be used to initiate or detonate any explosive product manufactured and authorized for sale by RISI.