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UTM-00339 | Rev 19
Page 253 of 253
DetNet South Africa Copyright © 2021
DigiShot
®
Plus 4G
Detonator
An electronic detonator that has been designed and developed by DetNet South
Africa
Initiation point
This is the location where the blast is initiated. The initiation point is always at a
place-of-safety (see below).
Initiation time
Time delays that are programmed into detonators.
Detonator harness
The cable that attaches to the detonator that allows detonators to be connected one
after another. The harness has two parameters: an inter-hole length and a down-line
length.
Place-of-safety
A location specified by the main blasting authority that guarantees human safety with
respect to fly rock, fumes, concussion and fall of ground.
Equipment safe
This is an area close to the bench, where equipment can be located with reasonable
assurance that it will not be damaged during or immediately after blast.
Blast voltage
The principal requirements for firing a DigiShot
®
Plus 4G Detonator are a minimum
supply voltage and the fire command. The minimum voltage required to fire a
DigiShot
®
Plus 4G Detonator is known as ‘blast voltage’.
Inherently safe
Equipment that is unable to transfer sufficient energy to the detonator to cause it to
initiate, even in the event of failure of certain safety interlocks in the detonator and
test equipment.