Onset RXW-TMB-868, RXW-TMB-921, RXW-TMB-922 User Manual

HOBOnet® Wireless Sensor Network

W

O

RXW Temperature Sensor (RXW-TMB-xxx) Manual

This sensor measures temperature and is designed to work with the HOBOnet (HOBO® RX)
Wireless Sensor Network in which data is transmitted wirelessly from the sensor mote across
the network to the station and then uploaded to HOBOlink® web-based software. With
HOBOlink, you can monitor sensor readings, view graphs, set up alarms, download data, and
more.

Specifications

Sensor

Measurement Range -40° to 100°C (-40° to 212°F)

RXW Temperature
Sensor

Models:

• RXW-TMB-900 (US)

• RXW-TMB-868 (Europe)

• RXW-TMB-921 (Taiwan)

• RXW-TMB-922

(Australia/NZ)

Included Items:

• Cable ties

• Screws

Accessory:

• Solar radiation shield
(RS3-B)

Accuracy ±0.25°C from -40° to 0°C (±0.45°F from -40° to 32°F)

Resolution 0.02°C (0.036°F)

Drift <0.01°C (0.018°F) per year

Response Time (typical,
to 90% of change)

ireless Mote

perating Temperature

Range

Radio Power 12.6 mW (+11 dBm) non-adjustable

Transmission Range Reliable connection to 457.2 m (1,500 ft) line of sight at 1.8 m (6 ft) high

Wireless Data Standard IEEE 802.15.4

Radio Operating
Frequencies

Modulation Employed OQPSK (Offset Quadrature Phase Shift Keying)

Data Rate Up to 250 kbps, non-adjustable

Duty Cycle <1%

Maximum Number of
Motes

Logging Rate 1 minute to 18 hours

Number of Data
Channels

Battery Type/
Power Source

Battery Life With NiMH batteries: Typical 3–5 years when operated in the

Memory 16 MB

Dimensions Sensor: 5.3 x 33 mm (0.2 x 1.3 inches)

Weight Sensor and cable: 82.5 g (2.91 oz)

Materials Sensor: Stainless steel waterproof tip

Environmental Rating Sensor and cable: Immersion in water up to 50°C (122°F) for 1 year

±0.20°C from 0° to 70°C (±0.36°F from 32° to 158°F)
±0.25°C from 70° to 100°C (±0.45°F from 158° to 212°F)

Without solar radiation shield: 2 minutes, 30 seconds in air moving 1
m/sec
With RS3-B solar radiation shield: 5 minutes in air moving 1 m/sec

-25° to 60°C (-13° to 140°F) with rechargeable batteries

-40° to 70°C (-40° to 158°F) with lithium batteries

Reliable connection to 609.6 m (2,000 ft) line of sight at 3 m (10 ft) high

RXW-TMB-900: 904–924 MHz
RXW-TMB-868: 866.5 MHz
RXW-TMB-921: 921 MHz
RXW-TMB-922: 916–924 MHz

Up to 50 wireless sensors or 336 data channels per one HOBO RX station

2

Two AA 1.2 V rechargeable NiMH batteries powered by built-in solar
panel or two AA 1.5 V lithium batteries for operating conditions of -40° to
70°C (-40° to 158°F)

temperature range -20° to 40°C (-4°F to 104°F) and positioned toward the
sun (see Deployment and Mounting), operation outside this range will
reduce the battery service life

With lithium batteries: 1 year, typical use

Cable length: 5 m (16.4 ft)
Mote: 16.2 x 8.59 x 4.14 cm (6.38 x 3.38 x 1.63 inches)

Mote: 223 g (7.87 oz)

Mote: PCPBT, silicone rubber seal

Mote: IP67, NEMA 6

22243-E

RXW Temperature Sensor (RXW-TMB-xxx) Manual

C

Specifications (continued)

ompliance Marks

RXW-TMB-900: See last page

RXW-TMB-868: The CE Marking identifies this product as
complying with all relevant directives in the European Union
(EU).

RXW-TMB-921: See last page

RXW-TMB-922: See last page

Mote Components and Operation

Mounting
Tab

Solar Panel

Sensor Cable

Sensor Mote Closed, Front Sensor Mote Closed, Back

Solar Panel Cable

Latch

Eyelet

Ground Wire
Port

LEDs

Battery Holder

Button

USB Port

Antenna

LCD Screen

then slowly as the mote registers with the network. Once the
network registration process is complete, the blue LED blinks at
4 seconds to indicate normal operation. If the mote is not
currently part of a network, the blue LED will be off. If the blue
LED is on and not blinking, there is a problem with the mote.
Contact Onset Technical Support.

Solar Panel Cable: This cable connects the built-in solar panel
to the mote circuitry.

Battery Holder: The location where the batteries are installed
as shown (see Battery Information).

USB Port: Use this port to connect to the mote to a computer
via USB cable if you need to update the firmware (see Updating

Mote Firmware).

Button: Push this button for 1 second to illuminate the LCD or 3

seconds for the mote to search for an RX Wireless Sensor
Network to join (see Adding the Mote to the RX Wireless Sensor
Network).

LCD Screen: The mote is equipped with an LCD screen that
displays details about the current status. This example shows all
symbols illuminated on the LCD screen followed by definitions
of each symbol in the table.

Sensor Mote Opened

Mounting Tab: Use the tabs at the top and bottom of the mote

to mount it (see Deploying and Mounting).

Solar Panel: Position the solar panel towards the sun to charge
the mote batteries (see Deploying and Mounting).

Sensor Cable: This is the cable that connects the mote to the
sensor.

Eyelet: Use this eyelet to attach a 3/16 inch padlock to the
mote for security.

Latch: Use the two latches to open and close the mote door.

Ground Wire Port: Use this port to connect a ground wire (see

Deploying and Mounting).

Antenna: This is the built-in antenna for the radio
communications across the RX Wireless Sensor Network.

LEDs: There are two LEDs to the left of the LCD screen. The
green LED blinks during the process of joining a network,
blinking quickly while the mote searches for a network and

LCD Symbol Description

The battery indicator shows the approximate battery
charge remaining.

This is a signal strength indicator. The more bars, the
stronger the signal between motes. If there is no x
icon next to the signal strength indicator, then the
mote is part of a HOBOnet Wireless Sensor Network.

An empty signal strength icon plus the x icon
indicates that the mote is not currently part of a
network. See Adding the Mote to the HOBOnet
Wireless Sensor Network for details on how to add a
mote to the network.

When the mote is in the process of joining a
network, the signal strength icon will blink and then
the bars in the icon will cycle from left to right. The x
icon will blink during the last step in the network
registration process (see Adding the Mote to the
HOBOnet Wireless Sensor Network for details).

This indicates a problem with the sensor itself (the
mote is operational). Check the sensor and make any
adjustments to it as needed. Contact Onset
Technical Support if the problem persists.

1-508-759-9500 (U.S. and International) 2 www.onsetcomp.com
1-800-LOGGERS (U.S. only)