Wireless Current Transmitter |
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The OMWT-AIN20MA Wireless
Current Transmitter is a battery
operated 12 bit analog-to-digital
converter with a microprocessor
controlled 418 MHz. FCC certified
radio transmitter.
The OMWT-AIN20MA
has an on board time of
day clock that allows it to spend
most of the time
in a low power
quiescent state. At predetermined
time intervals the clock will wake up
the onboard microprocessor.
Unique serial number information is
read from a semiconductor digital
device and analog data is read from
a 12-bit analog to digital converter.
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-AIN20MA
to consume very low
energy resulting in a battery life of
up to 2 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 OMWT-AIN20MA 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). Start the device
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 from the manufacturer.
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.
Tranmission Distances Up to 20 Miles with Optional Repeater and Transceiver
The OMWT-REP-900 Wireless Repeater is a 418 MHz RF receiver with an integrated 900 MHz RF
transceiver. It receives data packets from all OMWT Series 418 MHz Wireless Transmitters within its range,
and then transmits the data via the built-in 900 MHz radio to an
OMWT-XREC-SER-900. Data received by the OMWT-XREC-SER-900 receiver with serial interface can be displayed and
logged using the OMWT-SOFT Windows Software.
* Indoors(with 1/2 wave antenna, conditions allowing) up to 1500ft
Outdoors(with Dipole antenna, conditions allowing) up to 7 mi
Outdoors(with Yagi antenna, conditions allowing) up to 20 mi
See the Related Links section below for links to the Repeater and Transceiver.
Specifications
Current Input Range: 0 to 20 mA
Input Impedance: 120 Ohm
A/D Resolution: 12-bit
Accuracy: ±0.15%FSR
Transmission Frequency: 418 MHz
Transmission Rate:
10 to 17 seconds random
Transmission Range: Up to
180 m (600')
(actual distance can be
much less depending on
environmental conditions)
Operating Temperature:
-40 to 85°C (-40 to 185°F)
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Storage Temperature:
-40 to 85°C (-40 to 185°F)
Humidity: 0 to 90%RH
non-condensing
Battery: 3.6 V lithium battery included
Battery Life: 2 years
Shelf Life with Battery Installed:
5 years in quiescent mode
FCC Certified: FCC ID:M5ZANA
Dimensions:
38 H x 53 W x 15 mm D
(1.5 x 2.1 x 0.6")
Weight: 43 g (1.5 oz)
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† All dollar amounts on this site are shown in US currency.
Note: Each unit comes complete with operator’s manual.
Ordering Example: (1) OMWT-AIN20MA Wireless current transmitter, $156, plus (1) OMWT-REC232 Wireless receiver and 1.8 m (6') RS-232 cable with DB9F termination, $222, plus (1) OMWT-SOFT OMWT Series Windows software, $100, $156 + 222 + 100 = $478.00
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Related Links -
Related Products
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Related Products
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OMWT-SOFT:
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Windows Software for OMWT Series Wireless Transmitters
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OMWT-XREC-SER-900:
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Wireless Transceiver with RS-232 Interface for OMWT Series Transmitters/General Purpose Radio Modem
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OMWT-REP-900:
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Wireless Repeater for OMWT Series Wireless Transmitters
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