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6-4
Buffer
Model 6485 Picoammeter Instruction Manual
Buffer timestamps
Use the TSTAMP: menu item to change the timestamp format. To access the menu:
1.
Press MENU.
2.
Scroll to the TSTAMP: menu item using RANGE keys
and
.
3.
Press ENTER.
4.
Using RANGE keys
and
, select desired setting. Available options are ABS
(absolute) or DELT (delta).
5.
ABS: each timestamp is referenced to the first reading stored in the buffer. The first
reading always has a timestamp of 0000000.0000.
6.
DELT: each timestamp provides the time between the readings.
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.
y
n
Σ
X
i
n
-----
i=1
=
y
n
Σ
Avg
X
i
–
(
)
2
i 1
=
n
1
–
------------------------------------
=
Содержание 6485
Страница 1: ...Model 6485Picoammeter Instruction Manual A G R E A T E R M E A S U R E O F C O N F I D E N C E ...
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Страница 44: ...1 20 Getting Started Model 6485 Picoammeter Instruction Manual ...
Страница 66: ...3 6 Measurements Model 6485 Picoammeter Instruction Manual ...
Страница 138: ...9 20 Remote Operation Model 6485 Picoammeter Instruction Manual ...
Страница 159: ...11 CommonCommands ...
Страница 164: ...11 6 Common Commands Model 6485 Picoammeter Instruction Manual ...
Страница 165: ...12 SCPISignalOriented MeasurementCommands ...
Страница 190: ...14 12 SCPI Reference Tables Model 6485 Picoammeter Instruction Manual ...
Страница 214: ...16 14 Calibration Model 6485 Instruction Manual ...
Страница 219: ...A Specifications ...
Страница 221: ...B StatusandErrorMessages ...
Страница 227: ...C GeneralMeasurement Considerations ...
Страница 233: ...D DDCEmulationCommands ...
Страница 247: ...E ExamplePrograms ...
Страница 250: ...E 4 Example Programs Model 6485 Picoammeter Instruction Manual ...
Страница 251: ...F IEEE 488BusOverview ...
Страница 266: ...F 16 IEEE 488 Bus Overview Model 6485 Picoammeter Instruction Manual ...
Страница 267: ...G IEEE 488andSCPI ConformanceInformation ...
Страница 311: ......