Configuring Filters; Buffer (Data Store); Storing Readings - Keithley 6517B User Manual

Model 6517B Electrometer User's Manual

Configuring filters

Each measurement function has its own filter configuration. Perform the following steps to
configure filter:
1.
2.
3.
4.

Buffer (data store)

The Model 6517B has a buffer that can store from one to 15,706 readings. The actual number of
readings that can be stored in the buffer depends on how many optional data elements are
included for each reading (see Section 8 of the Reference Manual).
The basic data elements include the reading, units, reading number, and status (overflow or
underflow). In addition to these items, recalled data also includes statistical information such as
minimum, maximum, average, and standard deviation, which are part of the NEXT displays (see
Multiple displays
Optional data elements include timestamp, humidity, external temperature, channel number (for
scanning) and the V-Source level.

Storing readings

The following procedure to store readings uses a typical data store configuration: a user-defined
number of readings will be stored in the buffer (fill-and-stop). All aspects of data store configuration
and operation are detailed in Section 8 of the Reference Manual.
1.
2.
6517B-900-01 Rev. A / Jun 2008
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Select the measurement function.
Press CONFIG and then FILTER to display the following menu items:
AVERAGING:This item is used to control and configure the digital filter
MEDIAN:This item is used to control and configure the median filter
The menu structure for the two filters (averaging and median) is shown as follows:
a. AVERAGING (digital) filter options (TYPE is used to select the digital filter type):
• NONE: Disables the digital filter.
• AVERAGING: Selects the averaging filter and prompts you to enter
the number of readings to average (stack size).
• ADVANCED: Selects the advanced filter and prompts you to enter.
the number of readings to average (stack size); after entering the
stack size, you are then prompted to enter the noise tolerance level (0
to 100%).
AVERAGING-MODE is used to select the filter mode; either
MOVING or REPEAT.
b. MEDIAN filter options:
DISABLE: Disables the median filter.
ENABLE: Enables the median filter and prompts you to enter the range (1 to 5).
Use the menu items to configure a filter. A menu item is selected by placing the cursor on it
and pressing ENTER. Parameter values are changed using the cursor keys
)
the RANGE ( and
for more information).
Set up the instrument for the desired measurements (function or range).
Configure the data store as follows. A menu item is selected by placing the cursor on it and
pressing ENTER. Parameters are changed using the RANGE (
pressing ENTER (see Menus
structure).
a. Press CONFIG.
b. Press STORE.
c. Select CONTROL.
Return to Section Topics
keys, and then pressing ENTER.
for more information on navigating through the menu
Section 4: Measurement Options
( )
and and
)
and keys and
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