Calibration is a crucial aspect of many industries, ensuring that instruments and equipment operate accurately and reliably. However, even with the most precise calibration procedures in place, problems can arise.Â
Component shift, drops, and overloads are three of the main causes of calibration problems that can affect the accuracy and performance of equipment. In this article, we will explore these three causes of calibration problems and their effects on instrumentation. Understanding the root causes of calibration issues can help businesses and organizations prevent these problems and maintain the accuracy and reliability of their equipment.
Learn more about each causes here:
Component shift. First, the major components of test instruments (for example, voltage references, input dividers, current shunts) can simply shift over time. This shifting is minor and usually harmless if you keep a good calibration schedule; this shifting is typically what calibration finds and corrects.
Drops.  Suppose you drop a current clamp — hard. How do you know that clamp will accurately measure now? You don’t. It may well have gross calibration errors.
Overloads. Â Exposing a digital multimeter (DMM) to an overload can throw it off. Some people think this has little effect because the inputs are fused or breaker-protected. But those protection devices may not trip on a transient. Also, a large enough voltage input can jump across the input protection device entirely. (This is far less likely with higher-quality DMMs.)
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