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Front panel view of the Measurements International Model 8110A Zener Diode Voltage Standard. The instrument displays “Zener Diode Standard (+/-10V)” on its LCD screen, with clearly labeled Standard Output terminals (S+, V+, S-, V-), DC/AC Power indicators, and ±10V Local controls. Designed for NMI-grade DC voltage reference applications requiring direct SI traceability, the 8110A features built-in battery backup, a reversing switch for positive and negative 10V output, and industry-leading annual stability of ±1.5 µV/V. Manufactured by Measurements International, Prescott, Ontario, Canada.

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