Omega Vehicle Security OM51 - Manual

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User’s Guide
O M - 5 1
State Data logger
Shop online at
Introduction
Thank you for buying the OM-51 State
data logger. With proper care it will give
you years of reliable readings. The OM-51
State data logger has two inputs, a magnet-
ic reed switch located in the middle of the
hinge of the case (opposite the connectors),
and an external contact closure input. The
logger will indicate a closed state if either a
magnet is present, or the external contact is
closed.
A different kind of logger
Other loggers record measurements with
their sensors at regular preset intervals.
These loggers record the time evolution of
a physical property (temperature, RH, etc.).
Usually the physical property has a long
time-constant associated with it (water and
air temperatures usually change slowly), so
measuring at an interval that is shorter
than this time-constant will give a realistic
representation of what has happened. The
OM-51 State does not have a preset inter-
val. It will always be monitoring and will
only record when a change of state occurs.
OM-51 State data loggers in detail
OM-51 State data loggers work well when
there are only two values to measure (i.e.
open or closed; on or off). The OM-51 State
data logger records the time at which a state
change occurs (with a resolution of half a
second), and records nothing between these
changes. If you wanted to do this with a
logger that uses preset intervals, you would
have to set it to 1/2 second intervals, and an
8K logger would run out of memory in about
an hour. The OM-51 State data logger checks
for the contact closure every half of a second,
and can record 2000 state changes. Its time
out in the field is limited by the battery (about
one year).
No data is information, too
The OM-51 State logger records the initial
state and a final state at readout, even if the
state has not changed. This allows you to
determine the entire period during which the
OM-51 State was watching for state changes.
Inside this package:
OM-51 is shipped with:
1. OM-51 State data logger
2. Contact closure cable
3. Magnet
4. Mounting Accessories:
Magnet
Hook and loop tape
Double-sided tape
5. This User’s Manual
Mounting options
Included with your OM-51 data logger are
three options for mounting it on location: a
magnet, hook and loop tape, and double-sided
tape. These can be stuck on the back of your
data logger. When using the magnet, note that
it works best on flat surfaces.
D-5385-B M3615/1100
The OM-51 State data logger requires
Logger Software for Windows and PC
interface cable for operation.