Thermocouples provide a low-cost, reliable means of measuring temperature over a wide range. The challenge when using a thermocouple is accurately measuring the very low Seebeck output voltage (fractional to low millivolts) from the element, and providing for cold junction temperature compensation.
The Dallas/Maxim DS2760 High Precision Li+ Battery Monitor is very easily configured into an effective thermocouple interface. The Parallax DS2760 Thermocouple Module capitalizes on this application and provides a complete connection between BS2p BASIC Stamp microcontroller and a standard thermocouple element.
Features:
- 1-Wire interface allows multiple devices with just one BASIC Stamp I/O pin
- Cold Junction measurement: 0°C to +127°C (0.125°C resolution)
- Low power consumption: Active current = 90 µA max, Sleep current: 2 µA max
In addition to the module (shown above at left), the kit includes three Thermocouple elements:
- K-type (Chromel / Alumel) Range: 32 F to 1873 F (0 to 1023 C)
- J-type (Iron / Constantan) Range: 32 F to 1873 F (0 to 1023 C)
- T-type (Copper / Constantan) Range: 32 F to 752 F (0 to 400 C)
This product is ideally suited to work with a BASIC Stamp 2p module (#BS2P24-IC, #BS2P40-IC, or #BS2PE). We recommend the BS2p series because other BASIC Stamp modules will require a Serial-to-1-Wire protocol converter, as well as code, to manage the large tables across program slots.
Downloads:
DS2760 Thermocouple Kit Documentation (.pdf)
DS2760 Thermocouple Kit App Note (.pdf)
DS2760 Demo Source Code (.zip)
DS2760 Advanced Source Code (.zip)