American Magnetics 175 Industrial Level Transmitter (CE-Marked) - Manual (Page 3)

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SECTION A
Foreword
This section contains the Installation instructions for the American Magnetics (AMI) Model 175
Two-Wire Continuous Level Transmitter. Since it is impossible to cover all possible
sensor/systems configurations, only the most common are discussed in this document. The
user is encouraged to contact an authorized American Magnetics Customer Support
Representative for specific situations.
Foreword discusses safety precautions and safety notations as well as other generic information
used throughout this manual.
Introduction explains the functions and characteristics of the instrument, describes the model
number configurations for the instrument and the probe, and documents the performance
specifications, as well as, an explanation of the operating principle.
Installation describes the procedure for properly unpacking and installing the transmitter into
your vessel.
Safety Precautions
Conventions
The conventions used in this manual follow ANSI Z535.4-2002 for “Product Safety Signs and
Labels”. The safety markings in this manual are as follows:
Cryogen Safety
Cryogenic liquefied gases are potentially extreme suffocation hazards since a small amount of
liquid will vaporize and yield a very large volume of oxygen-displacing gas. Always ensure the
location where the cryogen used is well ventilated.
Cryogenic liquids, due to their extremely low temperatures, will burn the skin in a similar manner
as hot liquids. Never permit cryogenic liquids to come into contact with the skin or allow them to
soak clothing. Serious burns may result from careless handling. Never touch uninsulated pipes
or vessels containing cryogenic liquids. Flesh will stick to extremely cold materials. Even
nonmetallic materials are dangerous to touch at low temperatures. The vapors expelled during
the venting process are sufficiently cold to burn flesh or freeze optic tissues.
Containers of cryogenic liquids are self-pressurizing (as the liquid boils off, vapor pressure
increases). Hoses or lines used to transfer these liquids should never be sealed at both ends
(i.e. by closing valves at both ends).
The properties of many materials at extremely low temperatures may be quite different from the
properties that these same materials exhibit at room temperatures. Exercise extreme care when
handling materials cooled to cryogenic temperatures until the properties of these materials
under these conditions are known.
CAUTION !
CAUTION indicates a potentially hazardous situation which, if not
avoided, may result in minor or moderate injury. This category also
includes potential equipment damage.
WARNING indicates a potentially hazardous situation which, if not
avoided, could result in death or serious injury.
WARNING !