User's Manual

Revised: 4/29/2011 6650-11-0014 R4
Approval: Page 5 of 17
2.2 DEVICES USED IN UNDERGROUND COAL MINES:
This device has been evaluated by the Mine Safety and Health Administration (MSHA) per Title
30 Code of Federal Regulations Part 23.
MSHA Approval Number: TBD
Per MSHA’s evaluation, this product has been determined to be intrinsically safe under the
following conditions of use:
TBD
Never disassemble the handset, add or remove accessories, change or charge the battery,
while underground. Doing so may create an unsafe condition.
2.3 PROXIMITY TO BLASTING COMPONENTS:
The transmitted waveform characteristics are short duration (milliseconds/second) pulses, with
a power level of one (1) watt or less. For this reason the energy density is very low such that
the handset is classified as a low Power RF source as defined by the Institute of Makers of
Explosives, Safety Library Publication No. 20. Therefore, the Handset shall not be turned on
or operated within five (5) feet with respect to explosives or blasting components.