User Manual

Confidential
Patent #’s 7,420,471
5,939,986 and 6,810,353
Patent Pending
Page 4 of 6
Strata Proximity Systems Surface Silent Zone Assembly Users Manual v1.0
Confidential and Proprietary
December 19,
2011
1.3 Label Information
The Surface Display label is located on the face of the unit. A picture of the Strata label is below:
The Strata label defines the model and serial number of the Surface Silent Zone Assembly also
MSHA and Commonwealth of Pennsylvania information.
1.3.1.1 MSHA Blasting Distance
MSHA has published Program Policy Letter P11-V-07 concening Two Way Communications and
Blasting Circuits.
SPS magnetic field generators produce a magnetic field that at 100 kHz or .1000 MHz does not
achieve the Critical H Field until 1.42 m with a blasting cap having a pickup area of 10 sq.
meters.
SPS magnetic field generators are safe to 1.42 m from the blasting caps. SPS does recommend
a minimum distance of 25’ as a precaution.
1.3.1.2 Pennsylvania Blasting Distance
At this date, Pennsylvania has not made a recommendation or statement concerning surface
systems.
1.4 FCC Information
The FCC ID for the Surface Silent Zone Assembly is ZQ3-SPS-SSZON. When configured by Strata
for surface use, the device complies with Part 15 of the FCC Rules. Operation is subject to the
following conditions:
(1) This device may not cause harmful interference.
(2) This device must accept any interference received including interference that may
cause undesired operation.