System Description

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UTM-00355 | Rev 2

Page 253 of 261

Stemming of Charged Holes

When stemming holes with aggregate it is important to do the following:

 Position the down-line wire to mitigate damage as much as possible.

 Pull down-line wire away from the side from which stemming material is being poured down the hole.

Ensure that all slack is taken-up to prevent kinking inside the stemming column. Kinking will result in the cable

snapping if slumping is experienced.

Tagging of Charged Holes with DigiShot

Detonators

Tagging according to a plan and ensuring all Users adhere to this plan is important to reduce errors during blasting:

 Always ensure that a proper blast and tagging plan is available and that all personnel partaking have a

clear understanding of the tagging method and channel allocation. Duplicate, missing or extra detonators

and/or detonators on the wrong channel will have a negative impact at blasting time if discovered on the

Bench Ranger.

 Ensure that CE4 Tagger head is clean and free of water droplets or emulsion especially between the two

Pogo-pin connectors. This helps to prevent a conductive path between the connectors that will add leakage

during tagging and testing.

 When tagging using the “through holes” ensure that the CE4 Tagger head is regularly cleaned and

connectors closed and placed properly on the stake.

 When tagging directly on the tines, inspect the tines for alignment with harness wire guiding groves, that the

spade gap is in good repair and ensure that connector is properly closed and placed on the stake

 Ensure that Tagging is performed according to tagging plan and that all detonators are tagged to prevent

the system discovering extra or missing detonators during blasting

 When the connector is damaged or does not make proper contact and needs to be removed, cut the down-

line wires and strip the insulation sufficient in length to fit into the Back-to Back Connector without

protruding on either side of the connector as this can result in a short circuit.

LWAYS USE

ACK

-B

ACK

ONNECTORS AS A CONNECTOR REPLACEMENT KIT

Harnessing of the Blast

Harnessing according to the blast design will reduce fault diagnostics. Also take note of the following:

 Always use the correct harness wire as specified in the UTM’s.

 Test roll of harness wire with CE4 Tagger to ensure it is in good repair and that no short circuits are present

inside coil.

 When uncoiling the harness wire, ensure that it is uncoiled from the inside out to prevent tangling of wire.

 Where possible, connect harness wire in the same sequence as tagging, keep to the system limits and to

the tagging plan.

 Open detonator connector and ensure it is free of dirt or moisture as well as being in a good condition,

separate twisted pair with thumb, place harness wire onto connector aligning it with the guiding grooves and

corresponding tines. Next, tighten wire over connector ensuring that harness wires are properly aligned

and close connector until it clicks shut. If both wires are pushed into the same tine it will result in a short

circuit. If the harness wire is not properly positioned it can become trapped between the closing lid of the

connector and the top of the tine which will result in a harness break or intermittent connection, which will

be time consuming when doing fault diagnostics

 When joining of the harness wire is required, always use a Back-to Back Connector to ensure a proper