Q&A on Thermocouples and Compensation Wires: Effects of Reduced Insulation Resistance in Thermocouples
Answering questions about the effects of decreased insulation resistance in thermocouples!
Thermocouples may experience a decrease in insulation resistance during use on-site due to factors such as the influence of the installation location, the aging of insulation materials, and moisture intrusion during manufacturing. While there are many cases where they can be used without issues, what is the actual extent of the impact in such cases? Additionally, to what degree of insulation resistance reduction can be tolerated? A: When simply evaluating the integrity of a thermocouple, it is common to use the presence of continuity and high insulation resistance as benchmarks. For product shipments, the specifications for thermal electromotive force characteristics and insulation resistance are outlined in JIS C1602/1605 as part of the handover inspection. The current JIS has been aligned with IEC standards, so the specified insulation resistance value at the time of shipment is set quite high at 100MΩ / 500VDC. Previously, when Japan had its own unique standards, it was 5MΩ / 500VDC. There is no performance-based rationale for this change; it was simply an alignment of values with the IEC standards, and there is no clear justification for requiring insulation resistance to be this high. However, in most cases, the performance is judged solely based on this figure. *For more details, please refer to the PDF document or feel free to contact us.
basic information
For more details, please refer to the PDF document or feel free to contact us.
Price range
Delivery Time
Applications/Examples of results
For more details, please refer to the related link page or feel free to contact us.
