BI Technologies Develops Active Temperature Compensation Module
BI Technologies Electronic Components Division has developed a cold junction compensation module. Designated the 143-131A model, the module utilizes a PN junction that enables accurate temperature measurements when used with standard thermocouples.
According to Mike Ochoa-Hougan, Hybrid Program Manager for BI Technologies' Electronic Components Division, the Cold Junction Compensation Module provides a cost-effective method for obtaining accurate temperature readings. "The 143-131A module is compatible with common thermocouples, to accurately correct for the temperature of the cold junction," said Ochoa-Hougan. "The module is available in a standard three-terminal package, making it compatible with most data acquisition manufacturers' mounting boards and terminal blocks."
The Cold Junction Compensation module features laser-trimmed accuracy as well as an environmentally stable, robust construction that includes a ceramic base and hybrid technology to ensure thermal equilibrium. According to Ochoa-Hougan, when the module is affixed to the "cold junction" terminal block of a thermocouple circuit and appropriate excitation is provided, it will generate an accurate offset voltage to compensate for unwanted "cold junction" voltage.
The 143-131A Cold Junction Compensation module features an output voltage slope of -2.5mV/°C and an accuracy of ±1.25°C within the operating temperature range of -40 to +85°C. BI Technologies will also produce devices outside these specifications to meet customer requirements.
Typical pricing for the 143-131A CJC module is approximately $3.00 each in volume, with lead times from stock to 8 weeks.
