Hach 910, Instrument Manual

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Safety Precautions
Safety.fm
Safety Precautions
Hazardous Locations
The 910/920/930 Flow Meters are not approved for use in hazardous
locations as defined in the National Electrical Code.
DANGER
Although some Hach products are designed and certified for installation in
hazardous locations as defined by the National Electrical Code, many Hach
products are not suitable for use in hazardous locations. It is the responsibility
of the individuals who are installing the products in hazardous locations to
determine the acceptability of the product for the environment. Additionally, to
ensure safety, the installation of instrumentation in hazardous locations must be
per the manufacturer's control drawing specifications. Any modification to the
instrumentation or the installation is not recommended and may result in life
threatening injury and/or damage to facilities.
Confined Space Entry
The following information is provided to guide users of 950 Flow Meters on the
dangers and risks associated with entry into confined spaces.
DANGER
Additional training in Pre-Entry Testing, Ventilation, Entry Procedures,
Evacuation/Rescue Procedures and Safety Work Practices is necessary to
ensure against the loss of life in confined spaces.
On April 15, 1993, OSHA's final ruling on CFR 1910.146, Permit Required
Confined Spaces, became law. This standard directly affects more than
250,000 industrial sites in the United States and was created to protect the
health and safety of workers in confined spaces.
Definition of Confined Space
A Confined Space is any location or enclosure that presents or has the
immediate potential to present one or more of the following conditions:
• An atmosphere with less than 19.5% or greater than 23.5% oxygen
and/or more than 10 ppm Hydrogen Sulfide (H
2
S).
• An atmosphere that may be flammable or explosive due to gases, vapors,
mists, dusts, or fibers.
• Toxic materials which upon contact or inhalation, could result in injury,
impairment of health, or death.
Confined spaces are not designed for human occupancy. They have restricted
entry and contain known or potential hazards.
Examples of confined spaces include manholes, stacks, pipes, vats, switch
vaults, and other similar locations.
Standard safety procedures must always be followed prior to entry into
confined spaces and/or locations where hazardous gases, vapors, mists,
dusts, or fibers may be present. Before entering any confined space check
with your employer for procedures related to confined space entry.
FCC Requirements
1. The Federal Communications Commission (FCC) has established Rules
which permit this device to be directly connected to the telephone