User's Manual

Page 4 of 10
Issuer: IWT, Inc. Doc. Num.: 6650-11-0040 Rev: A
Revised: Dec 15, 2011
Approval:
guarantee that interference will not occur in a particular installation. If this equipment does
cause harmful interference to radio or television reception, which can be determined by turning
the equipment off and on, the user is encouraged to try to correct the interference by one or more
of the following measures:
-- Reorient or relocate the receiving antenna.
-- Increase the separation between the equipment and receiver.
-- Connect the equipment into an outlet on a circuit different from that to which the receiver is
connected.
-- Consult the dealer or an experienced radio/TV technician for help.
2.2 Requirements for MSHA Compliance
This device has been evaluated by the Mine Safety and Health Administration (MSHA) per Title
30 Code of Federal Regulations Part 23.
MSHA Intrinsic Safety Evaluation Number: 23-XXXXXX
Per MSHA’s evaluation, this product has been determined to be intrinsically safe and may be
used in areas where permissible equipment is required under the following conditions:
 The Sentinel Beacon is approved for use by MSHA with the following C size batteries
ONLY: Duracell MN1400, PL1400, Energizer E93
 Do NOT mix batteries of different types or manufacturers.
 Replace both batteries at the same time.
 The Sentinel Beacon’s antenna must be located greater than 3.3 feet from blasting
circuits.
 Where magnetic mounting is used for the Sentinel Beacon, the magnets must comply
with MSHA Program Information Bulletin (PIB) 09-36 which states permanent magnets
may not be used in the same mining section as remote control equipment using Hall-
effect switches.
The Sentinel Beacon is approved for use by MSHA with the (non-detachable) Astron Wireless:
NP91WGIR3MMX9I.