问题：
What is not lost when the NVRAM is erased?
答案：
The following information is not lost when NVRAM is erased:
- Serial number of the oscilloscope
- Accumulated time the oscilloscope has been on
- Number of times the oscilloscope has been powered on
- Factory calibration constants, which are established at the factory and cannot be changed by the user or the oscilloscope
- Enhanced Accuracy calibration constants, which are periodically calculated and updated
- Time and Date
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常见问题 ID 57736
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