Section 8: Buffer (data store) Model 6517B Electrometer Reference Manual
8-8 6517B-901-01 Rev. C / August 2015
MAX: maximum reading in buffer, for example:
MAX=+1.635968e+00 at RDG# +00090
Notes:
Display response may be slow due to calculation of statistics for large buffers
Exponents are in terms of primary units of function on top line (for example, volts, not
millivolts)
MIN: minimum reading in buffer, for example:
MIN=+1.627611e+00 at RDG# +00012
Average: This math operation displays the mean value of the buffered readings, for example:
Average = +1.6345e+00
The equation used to calculate the mean is:
Where: x
i
is a stored reading, and n is the number of stored readings Note that if n = 0,
the result is NAN (not a number).
StdDev: This operation displays the standard deviation of the stored readings, for example:
StdDev = 1.4944e-03
The equation used to calculate the standard deviation is:
Where: x
i
is a stored reading, and n is the number of stored readings.
Note that if n1, the result is NAN (not a number). These statistics are invalid if the measurement
function changed during data store (for example, when scanning different functions). The Model
6517B uses IEEE-754 floating point format for math calculations.
The last display in this series allows you to send the buffered readings to a printer.
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