| Sponsor |
|
Digital Warehouse Automation in High-Mix PCB Assembly
High mix SMT production demands full material visibility. This white paper shows how ASTER improved traceability, inventory accuracy and FIFO control through integrated automation and reel-level tracking across warehouse operations.
Essegi Automation
|
|
| Sponsor |
|
Epoxy Offers Ultra High Heat Transfer
Bond EP5TC-80 is a NASA low outgassing rated epoxy that achieves a thermal conductivity of 3.3-3.7 W/(m·K), while also retaining its electrical non-conductivity.
Master Bond
|
|
Calibration of Tweezer Meters Enabling Sub 1 pF and Sub 10 nH
The importance of calibration for two-wire measurement setups is reaffirmed. For tweezer meters, this issue is critical due to the higher offset values, which can be as large as 19 nH.
Technical Paper
DOWNLOAD
|
Authored By:
Michael S. Obrecht, Ph.D.
Siborg Systems Inc
Ontario, Canada
Summary
The increasing popularity of tweezer meters has highlighted the need for calibration tools to mitigate the inherent parasitic capacitance and inductance in test leads. Due to their similar mechanical design, most tweezer meters face the same limitations when measuring very small capacitance and inductance values, caused by these parasitic.
Properly compensating for parasitic effects is crucial for enhancing measurement accuracy and extending the measurement range. Parasitic capacitance can reach up to 0.3 pF, while parasitic inductance can exceed 15 nH, making accurate measurement of small components nearly impossible. These parasitics are influenced by the distance between the test leads - parasitic capacitance increases as the distance decreases, while parasitic inductance increases as the distance grows. A straightforward but effective calibration method is available to address these issues.
Conclusions
The importance of proper calibration for two-wire measurement setups is reaffirmed. For tweezer meters, this issue is even more critical due to the potentially higher offset values, which can be as large as 19 nH.
Initially Published in the SMTA Proceedings
|
Comments
|
No comments have been submitted to date.
|
|
|
|
Free Newsletter Subscription
Circuitnet is built for professionals who bear the responsibility of looking ahead, imagining the future, and preparing for it.
Insert Your Email Address
|
|
