APPENDIX C. FORMULAS page24

C.6. VARIANCE

The variance analyzer mode is used to check whether the counts seen by the controller are actually from the proper distribution. If the distribution approaches normal, the resulting number will approach 0. Any significant deviation from the normal distribution will result in a larger number.

The two most common problems resulting in variance failure are light leaks in the detectors, and periodic noise in the electronics. Periodic noise will result in a number of about 1, a light leak will usually result in a number larger than 2. The number displayed during a variance test is the absolute value of the average of a number of these tests, with one test being performed every

nnseconds. The data is valid after three iterations of nn seconds. The pass/fail criteria varies from unit to unit and is included in the variance section of the manual on most units.

Where:

R = the quality factor

C = each of the individual counts

N = number of counts taken

_

R = mean variance

I = number of iterations

Model AM-255

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Sigma AM-255 service manual Appendix C. Formulas page24
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AM-255 specifications

The Sigma AM-255 is a cutting-edge, versatile piece of equipment designed to meet the demands of professionals across various industries. Known for its robust engineering and innovative technologies, the AM-255 stands out as a reliable solution for tasks requiring precision and efficiency.

One of the primary features of the Sigma AM-255 is its advanced processing capabilities. Equipped with a high-performance processor, the AM-255 is capable of handling complex calculations and data processing tasks with ease. This results in faster operation speeds, reducing downtime and allowing users to focus on their workload without the frustration of lagging performance.

The AM-255 also integrates state-of-the-art connectivity options. With multiple ports for USB, HDMI, and Ethernet, users can easily connect the device to various peripherals and networks. This flexibility is crucial for professionals who rely on external devices and need to transfer data seamlessly.

In terms of user interface, the AM-255 boasts an intuitive touch screen display that responds quickly and accurately to input. The interface is designed to simplify navigation, making it accessible even for those who may not be tech-savvy. This attention to user experience not only enhances productivity but also encourages proactive engagement with the system.

Another notable characteristic of the Sigma AM-255 is its durability. The device is engineered with high-quality materials that withstand harsh working conditions, making it ideal for fieldwork or industrial environments. Its rugged construction ensures longevity, minimizing maintenance costs and providing peace of mind for users.

Furthermore, the AM-255 features energy-efficient technologies, contributing to a lower carbon footprint. This aligns with global trends towards sustainability, allowing organizations to adopt more eco-friendly practices without sacrificing performance.

Security is also a top priority in the design of the Sigma AM-255. With advanced encryption protocols and secure user authentication features, the device protects sensitive data and prevents unauthorized access, which is crucial for businesses handling confidential information.

In summary, the Sigma AM-255 is a remarkable solution that combines performance, connectivity, user-friendliness, durability, energy efficiency, and security. These main features make it a valuable asset for professionals seeking to enhance their operational efficiency and productivity in today’s fast-paced, technology-driven environment. As new technologies continue to evolve, the Sigma AM-255 is well-positioned to adapt and meet future industry challenges.
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