Buffer and Sweeps
6-3
Clear
To clear the buffer, press CONFIG followed by STORE, then set the reading count to 0
(pressing AUTO will clear the display quickly). Press ENTER with a reading count of 0
displayed to finish clearing the buffer.
Buffer statistics
•
MIN
and
MAX
provides the minimum and maximum readings stored in the buffer.
It also indicates the buffer location of these readings.
•
The PK-PK (peak-to-peak) value is the difference between the maximum and
minimum readings stored in the buffer:
PK-PK = MAX - MIN
•
Average
is the mean of the buffer readings. Mean is calculated as follows:
Where: X
i
is a stored reading
n is the number of stored readings
•
The
STD DEV
value is the standard deviation of the buffered readings. Standard
deviation is calculated as follows:
Where:
X
i
is a stored reading
n
is the number of stored readings
Avg
is the mean of the buffer readings.
NOTE
If any readings stored in the buffer are the result of an overflow or overvoltage
condition, the buffer statistics calculation will not be performed. Buffer recall
via front panel operation will show a series of dashes in place of the requested
buffer statistics value. In remote operation, the corresponding buffer statistics
will be represented by the value +9.91e37.
y
n
Σ
X
i
n
-----
i=1
=
y
n
Σ
Avg
X
i
–
(
)
2
i 1
=
n
1
–
------------------------------------
=
Summary of Contents for 6487
Page 13: ......
Page 15: ......
Page 35: ...1 20 Getting Started Model 6487 User s Manual...
Page 47: ...2 12 Connections Model 6487 User s Manual...
Page 61: ...3 14 Measurements and Sourcing Voltage Model 6487 User s Manual...
Page 85: ...7 8 Remote Operation and Commands Model 6487 User s Manual...
Page 86: ...A Specifications...
Page 88: ...B GeneralMeasurement Considerations...
Page 94: ...C ExamplePrograms...
Page 101: ......
Page 103: ......
Page 104: ......
