User's Manual

1673 OPERATION MANUAL REV A
1
1. INTRODUCTION
1.1. THEORY OF OPERATION
1.1.1. The Remote Firing Device (RFD) is used to activate both electric and non-
electric detonator devices. The system is strictly an electronic device, containing no
explosive. The Remote Unit is placed at the explosive site, with a shock tube or the
electric detonator firing cable running to the detonator(s). The Controller is placed at
the intended firing position.
1.1.2. Using remote control technology allows the blaster to increase his standoff
distance for maximum safety. With the blaster unconnected to the firing line, he is free
to move around to achieve both the safest firing position, as well as the preferred
viewing position. Blast efficiency is improved as the consumption of non-electric lead-
in-line is reduced by as much as 90%. In subsurface operations, safety is achieved
when all headings are fired from one position with all personnel above ground.
Significant cost savings may be found in comparison to expensive mains firing systems.
1.1.3. Critical features of this Remote Firing Device over other systems are the two-
way communication link and the timed automatic-disarming function. The two-way
communication feature provides a high degree of safety, by allowing the blaster to verify
that each Remote Unit is disarmed before approach. The automatic-disarming function
ensures that the unit returns to a safe state in the event of a loss of communications,
after a time out period.
1.1.4. In subsurface operations, safety is achieved when all headings are fired from
one position with all personnel above ground. Significant cost savings may be found in
comparison to expensive mains firing systems. The motion detection feature can be
used to help determine if the blast has been initiated successfully.
1.2. STORAGE AND ENVIRONMENTAL CONDITIONS
1.2.1. The Controller Unit and the Remote Unit cases (with lids closed) are airtight,
watertight, and dustproof. The Remote Unit should normally be operated with the lid
closed and fastened. The internal case contains the circuit electronics and should
remain sealed.
1.2.2. The Controller and the Remote Units are shock resistant and will handle
considerable abuse. They have been drop tested from 6 feet (1.8 m) onto concrete.
1.2.3. The Remote Unit firing terminals are electrically isolated from the firing energy
at all times except when firing.
1.2.4. The RFD system should be stored in a cool, dry place. The storage
temperature range is -4 to 86 F (–20 to 30 C). Exceeding the storage temperature
range may result in damage to the internal battery packs.