Model-TBU-00

Supported Applications

The Dwyer Model TBU-00 is a high precision temperature transmitter designed to mount in most temperature sensor instrument enclosures. It serves as a universal input signal conditioner for process control applications, reducing inventory requirements by supporting multiple sensor types through a single device.

• Temperature measurement using thermocouples (Types J, K, R, S, T, N, E, and B)
• Resistance Temperature Detector (RTD) inputs: 2, 3, or 4 wire Pt100; 2 or 3 wire Pt1000
• NTC thermistor input (2 wire)
• Voltage measurement from 0 to 50 mV

Operating Conditions & Performance

The transmitter operates within an ambient temperature range of -40°F to 185°F (-40 to 85°C). It requires a power supply between 10 and 35 VDC. The typical response time is 1.6 s, with a temperature drift specification of < ±0.16% / 25°C.

Accuracy varies by input type as documented in the series specifications:

• Voltage (0 to 50 mV): ±0.1% FS
• Thermocouples J, K, R/S, T, N, E, B: ±0.1% FS
• Pt100/Pt1000 RTDs: ±0.13% FS
• NTC Thermistor: ±0.3°C

Configuration Options

The Model TBU-00 offers configurable parameters to match specific sensor and process requirements.

Sensor Input Configuration

The universal input accepts the following configurations:

• Thermocouples: J, K, R, S, T, N, E, B
• Pt100 RTD: 2, 3, or 4 wire connections
• Pt1000 RTD: 2 or 3 wire connections
• NTC Thermistor: 2 wire connection
• Voltage: 0 to 50 mV range

Output and Power Options

The output signal is configurable via software:

• Linearized 4-20 mA (direct acting)
• Reverse 20-4 mA loop powered configuration
• Transmitter type: 2, 3, or 4 wire operation

Configuration and Physical Attributes

The device features a micro-USB port for easy configuration and calibration in the lab or field. The physical dimensions are 13/16 [20.5] height by 1-23/32 [43.5] diameter, with a weight of 1.4 oz (40 g). It carries CE approval.

Key Product Differences

The Model TBU-00 is factory set to Pt100 Ω RTD, 0 to 100°C, direct acting by default. Users can reconfigure the input type, measurement range, and calibration using configuration software connected via the micro-USB port.