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The OMWT-TEMP15 Wireless
Temperature Transmitter is a battery
operated digital temperature sensor
with a microprocessor controlled
418 MHz FCC certified radio
transmitter. The OMWT-TEMP15
has an on board time of day clock
that allows it to spend most of the
time in a low power quiescent state.
At pre-determined time intervals the
clock will wake up the onboard
microprocessor. Unique serial
number information and digital
temperature data are read from a
digital temperature sensor. This
information is combined with a
CRC-16 error check and transmitted
in a very short data packet that
results in a transmitter on time of only
15 milliseconds. This architecture
allows the OMWT-TEMP15 to
consume very low energy resulting in
a battery life of up to 3 years.
The electronics are coated with a
conformal rubber material that
provides a moisture barrier against
condensation. Submersion in water is
not recommended. A hole in the top
ABS cover permits a special tool to
be inserted to activate the service
switch. The device is shipped with
the transmitter turned off (anytime
the device is to be shipped the
transmitter should be turned off or
must be placed in a shielded
container to prevent interference that
might cause shipping problems).
The unit is started by momentarily
pushing the service switch (you will
feel the button click). When the
service switch is pushed, a data
transmission occurs immediately and
a special mark is introduced in the ID
field of the transmitted data packet to
indicate which device is in service or
installation. The service switch is also
used to put the device in a quiescent
mode (no transmissions and very
low power consumption). This is the
state the device is in when you
receive it. Push and hold the service
switch for 10 seconds or more to
enter this powered down state.
Using the OMWT Series Windows
software incoming data being
received from OMWT Series
Wireless Transmitters can be viewed
in a real-time or historical time-base
chart or numerical view. High/low
alarms can also be set for each
transmitter signal with either a visual
or audible alarm indication on the
PC. Data can also be logged to disk
at a user-specified rate in a text file
format that can be opened up into
Microsoft Excel. The OMWT Series
Windows software also includes a
DDE Server that can interface the
data being received from OMWT
Series Wireless Transmitters to
other Windows software packages.
Specifications
Transmission Frequency:
418 MHz *Transmission Range:
up to 180 m (600') depending on environmental conditions Transmission Rate: 10 to 17
seconds random Accuracy: ±0.5°C (±0.9°F)
-10 to 85°C, (-18 to 185°F) Operating Temperature:
-40 to 85°C (-40 to 185°F) Storage Temperature:
-40 to 85°C (-40 to 185°F) Humidity: 10 to 90%RH
non-condensing Battery: 3.6V lithium battery included Battery Life with Transmissions:
3 years Shelf Life with Battery Installed:
5 years in quiescent mode FCC Certified: FCC ID: M5ZCNT Dimensions:
38 H x 53 W x 15 mm D
(1.5 x 2.1 x 0.6") Weight: 43 g (1.5 oz)
注: Each unit comes complete with operator’s manual.
