Dwyer Instruments TBU-00 Specifications-installation And Operating Instructions

Model TBU-00 Temperature Transmitter

TO PC USB PORT

®

Specications - Installation and Operating Instructions

Bulletin T-TBU-00

The Model TBU-00 Temperature Transmitter is a high precision temperature
transmitter designed to easily mount in most temperature sensor instrument
enclosures. The universal input reduces inventory while the micro-USB port facilitates

easy conguration, and calibration in the lab or in the eld. The versatile TBU
model allows for selection and conguration of input type, measurement range, and
calibration. The output can be set as either direct 4 to 20 mA, or reverse 20 to 4 mA,
through easy to use conguration software.

Conguration

During the setup, the transmitter is powered by the USB, and does not require an
external power supply. See Figure 1. The transmitter setup can also be made by

connecting it to the loop using the loop power supply. There is no electrical insulation

between the transmitter and the communication port (interface), therefore do not
congure the transmitter when it is connected to the process.

PLUG A

POWERED
CURRENTS
LOOP

FACTORY SETTING AND CONFIGURATION

When the transmitter is used with the factory setting, no further action is required
and the transmitter is ready to be installed. Changes to the conguration are possible
through the TBU software, provided free of charge on the Dwyer website. The factory
setting for the TBU is for a Pt100 3-wire sensor with a range of 0 to 100°C with 0°C
zero correction and an output of 4 to 20 mA.

CAUTION

equipment is powered may result in equipment damage.

After these connections, the user must run the TBU software. See Figure 2 for software

screen.

TRANSMITTER USB CABLE

Figure 1: USB cable connections

The USB communication port (micro-USB) of the TBU-00 is not
electrically insulated from the transmitters input. Connection while

MICRO B

13/16 [20.5]

SPECIFICATIONS
Input: Thermocouples J, K, R, S, T, N, E, and B; 2, 3, or 4 wire Pt100 RTD, 2 or 3

wire Pt1000 RTD, 2 wire NTC thermistor, or 0 to 50 mV voltage.

Output: Linearized 4 to 20 mA, 2 wire or 20 to 4 mA loop powered.
Transmitter Type: 2, 3, or 4 wire.
Temperature Limits: -40°F to 185°F (-40 to 85°C).
Power Requirements: 10 to 35 VDC.
Accuracy: See chart below.
Temperature Drift: < ±0.16% / 25°C.
Response Time: 1.6 s, typical.
Weight: 1.4 oz (40 g).
Agency Approvals: CE.

ACCURACY CHART

Input Type

Voltage

Thermocouple J

Thermocouple K

Thermocouple R/S

Thermocouple T

Thermocouple N

Thermocouple E

Thermocouple B

Pt100/Pt1000 RTDs

NTC Thermistor

Max. Temperature

Range

0 to 50 mV

-148 to 1400°F
(-100 to 760°C)

-238 to 2498°F
(-150 to 1370°C)

-58 to 3200°F
(-50 to 1760°C)

-256 to 752°F
(-160 to 400°C)

-454 to 2372°F
(-270 to 1300°C)

-130 to 1328°F
(-90 to 720°C)
932 to 3308°F
(500 to 1820°C)

-328 to 1202°F
(-200 to 650°C)

-22 to 248°F
(-30 to 120°C)

1-23/32 [43.5]

Min. Temperature
Range Accuracy (Typical)

5 mV
212°F (100°C)

212°F (100°C)

752°F (400°C)

212°F (100°C)

212°F (100°C)

212°F (100°C)

752°F (400°C)

104°F (40°C)

104°F (40°C)

±0.1% FS
±0.1% FS

±0.1% FS

±0.1% FS

±0.1% FS

±0.1% FS

±0.1% FS

±0.1% FS

±0.13% FS

±0.3°C

The elds in the software screen pictured in Figure 2 mean:

1. General Information: This eld shows information that identies the transmitter.
This information could be sent to Dwyer Instruments when additional technical
assistance is requested.

2. Sensor: Select the type of sensor to be used.

3. Measuring Range: Sets the measurement range of the transmitter.

Lower Range Limit: Equivalent temperature for a current of 4 mA.
Upper Range Limit: Equivalent temperature for a current of 20 mA.
Sensor Range: The values chosen cannot exceed the range of the sensor.
Minimum Range: Do not set a lower band (span) than the minimum range indicated.

4. Sensor Failure: Establishes the output behavior when the transmitter indicates a

failure.
Minimum: Output current goes to < 3.6 mA (down-scale), typically used for
refrigeration.
Maximum: Output current goes to > 22.0 mA (up-scale), typically used for heating.

5. Zero Offset: Offset allowing for small deviations presented in the transmitter output.

6. Send Conguration: Once set, the setup will be uploaded to the transmitter.

7. Read Conguration: Reads the current setup in the connected transmitter.

DWYER INSTRUMENTS, INC.

P.O. BOX 373 • MICHIGAN CITY, INDIANA 46360, U.S.A.

Figure 2: Software screenshot

Phone: [phone]

Fax: [phone]

www.dwyer-inst.com

e-mail: [e-mail]

MECHANICAL INSTALLATION

Pt100 SENSOR

The TBU-00 transmitter is suitable to be installed in instrument enclosures. Vibrations,
moisture, extreme temperatures, electro-magnetic interference, high voltage, and
other interferences can permanently damage the unit, and could cause an error in the

measured value.

Pt100 SENSOR

4-WIRE

ELECTRICAL INSTALLATION

Recommended wire size: 26 AWG to 16 AWG (0.14 to 1.5 mm

2

).

Recommended terminal torque: 7.08 in-lbf (0.8 Nm).

RECOMMENDATIONS FOR INSTALLATION

Separate signal lines from facility power lines. The use of grounded conduit is
recommended.

The instrument must be powered from the instrumentation power supply circuit.
Transient suppression should be used with inductive loads such as contact coils and

solenoids.

ELECTRICAL CONNECTIONS

The gures below shows the electrical connections required. Terminals 3, 4, 5 and
6 are dedicated to the sensor connection. LOAD represents the 4 to 20 mA current
measuring device (indicator, controller, recorder, etc.).

Note: When using a Pt100Ω 2-wire RTD, terminals 3 and 4 must be interconnected,
according to Figure 3 below. The Pt100 wire length should be less than 12 in (30 cm)
to maintain the measurement error within specications (electrical resistance).

2-WIRE

JUMPER

LOAD

POWER
SUPPLY

Figure 5: Pt100 4-wire

NTC SENSOR

2-WIRE

TRANSMITTER

LOAD

LOAD

POWER
SUPPLY

POWER
SUPPLY

Figure 3: Pt100 2-wire

Pt100 SENSOR

3-WIRE

TRANSMITTER

TRANSMITTER

POWER
SUPPLY

LOAD

LOAD

POWER
SUPPLY

Figure 6: NTC 2-wire

THERMOCOUPLE

SENSOR

TRANSMITTER

TRANSMITTER

Figure 7: ThermocouplesFigure 4: Pt100 3-wire