USB-DAQ-TD is specifically designed for temperature measurement, providing 2-channel thermocouple input, supporting eight types: K, J, N, R, S, T, E, B. It has a measurement range of -210°C ~ 1800°C, with built-in cold-junction compensation and 50/60Hz noise filtering.
Product Features
- USB 2.0 Full Speed bus-powered
- 21-channel 3.3V Digital I/O (5V tolerant)
- Supports I2C/SPI/UART/PWM/Counter
- 2-channel thermocouple input
- Supports sensor types: K, J, N, R, S, T, E, & B
- Supports Python, C#, and LabVIEWs
Pinout
Thermocouple Wiring Instructions
The USB-DAQ-TD uses standard-specification thermocouple connectors; simply plug in the connector for use. If you purchase thermocouple wire separately and connect it to a standard connector, reverse polarity may occur. If the positive and negative poles of the thermocouple are reversed, the DAQ temperature reading will show a decrease when heating and an increase when cooling. In such cases, swapping the positive and negative wires will resolve the issue.
Product Specifications
| Parameter | Test Condition/Note | Min | Typical | Max | Unit |
|---|
| Input High Voltage | | 3 | 5 | 5.5 | V |
| Input Low Voltage | | -0.5 | 0 | 0.5 | V |
| Input Impedance | | 50k | | | Ω |
Digital Output
| Parameter | Test Condition/Note | Min | Typical | Max | Unit |
|---|
| Output High Voltage | | 3.1 | 3.3 | 3.5 | V |
| Output Low Voltage | | -0.5 | 0 | 0.5 | V |
| Output Current (Source) | | | | 10 | mA |
| Output Current (Sink) | | | | -10 | mA |
| Parameter | Test Condition/Note | Min | Typical | Max | Unit |
|---|
| ADC Resolution | | | 19 | | bit |
| Conversion Time | Var. by mode | 90 | | 185 | ms |
| Temperature Range | Var. by TC type | -210 | | 1800 | °C |
| Rated Temp Res. | | | 0.0078125 | | °C |
| FS & Linearity Err | | | ±0.15 | | % |
| Cold Junction Acc. | | | ±0.7 | | °C |
| Voltage Protection | | | ±45 | | V |
| Noise Rejection | Configurable | 50 | | 60 | Hz |
| CMRR | | | 70 | | dB |
| 50/60Hz Rejection | Base & Harmonics | | 91 | | dB |
Communication Interfaces
| Parameter | Test Condition/Note | Min | Typical | Max | Unit |
|---|
| UART Baud Rate | | | | 460.8k | bps |
| SPI-1 Trans. Rate | | | | 36M | Hz |
| SPI-2 Trans. Rate | | | | 18M | Hz |
| I2C Trans. Rate | | | | 400k | Hz |
