What is the sample rate for meter measuring a 400Hz system?

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Issue
The sample rate is needed for a 400Hz system.

Product Line
ION9000
PM8000
ION7400
ION8650

Environment
400Hz Systems

Resolution
The sample rate given in the technical data sheet is based on 60 and 50Hz systems. The sample rate at 400Hz is calculated by 60*(given sample rate)/400.

For example:
ION7400/PM8000: 60*256/400 = 38 samples/cycle
ION9000/8650: 60*1024/400 = 153 samples/cycle