5. Decoder Operation
5.1 Decoder Operation
The Decoder Mode of operation is used to detonate a blasting cap for seismic dynamite operation.
Extreme caution needs to be exercised when working around dynamite and detonation equipment.
Review and follow all safety guidelines.
The Decoder unit is connected to a detonation Cap, an uphole geophone, a radio, and a battery.
Whenever the Decoder is connected to the CAP or whenever a radio is used, the CAP can fire at
any time. The unit has been designed to only fire the CAP when both the ARM and the Charge
buttons are held and a valid start code from the Encoder is received. However, potentially there is
a chance that the CAP can accidentally fire from either RF noise or a hardware failure. The
following is the normal A3/UE mode operation procedure:
• The Shooter receives a valid GPS position for the new shot point.
• The Shooter verifies that there is no danger in accidental firing of hole and that all
personnel and livestock are clear of the shot hole.
• The “Shooter” connects the unit to the uphole geophone, and Cap at the new shot hole.
• The Shooter normally checks the resistance of both the geophone and the Cap.
• After all tests are satisfactory, the shooter either calls in that he is ready or uses the
automatic ready signal to notify the recorder that he is ready to shoot.
• The Shooter then presses the “Arm” and “Charge” switches to get the box ready to fire.
• The Boom Box 3 will automatically send back a “Ready Message” if enabled.
• The Encoder then sends a start code and the Decoder fires the Shot.
• The shooter then releases the “Arm” and “Charge” switch and disconnects from the hole.
• The Decoder unit automatically sends the Shot Status Message to the Encoder.
• The Shooter can check the status of the Box immediately after the Shot is fired.
o Test LED = Green when Confirmation Time Break is valid.
o GPS LED = Green when Uphole time is valid
o The display will show the Uphole time, CTB value, and battery voltage.
To Next Page
Loading...
Need help?
General