Arizona MAX-5000XL - Manual (Page 37)

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5.2. Stored Data Menu
This function is used to work with data
stored in the instrument from past tests.
Up to 1,000 test results and 100 graphs
can be stored before the oldest is "pushed
out" (overwritten). To access this function,
go to the Main Menu and select the
STORED DATA MENU. On 21 CFR, Part
11 compliant units, the DELETE is not
available.
Delete Stored Data (Not available on 21 CFR, Part 11 compliant units)
This function is used to delete individual results and is non-reversible. Normally
results are deleted to make management of the data easier. If the test results need to
be saved, they should first be printed or stored in a computer file. Moving the selector
bar to a particular test and pressing [DELETE] will erase the record so be careful! If
the list is empty, the screen will show EMPTY.
Analyze Stored Data
Mean, Standard Deviation, and Relative Standard Deviation are calculated using the
following formulas available on many hand calculators.
Mean = total of results divided by number of results.
Standard Deviation =
1 - n
x - x 2 ) (

Relative Standard Deviation expressed as percentage = Standard
Deviation divided by Mean, multiplied by 100%