Section 4: Basic measurements
Model 6517B Electrometer Reference Manual
4-28
6517B-901-01 Rev. C / August 2015
FILTER
Use this menu item to configure the two basic filter types; averaging and median. Note that you can
use either the averaging filter, the median filter, or both.
The filter menu is available from the function configuration menus (for example, press
CONFIG V
) or
by pressing
CONFIG FILTER
with the desired function already selected.
RESOLUTION
The RESOLUTION parameter sets the display resolution.
AMPSREL
Leakage current in a test fixture can corrupt a resistance measurement. This leakage current can be
cancelled by performing a REL on the current component of the measurement. With this menu item,
you can use the established amps REL value for the resistance measurement (see
Cancelling test
fixture leakage current
(on page 4-22) for more information).
ENABLED: Use this option to use the amps REL value. After this option is selected, the instrument
displays the status of REL for the ohms function and for the amps function. If REL for the amps
function is disabled, then no amps REL operation is performed on the measurement.
DISABLED: Use this option if you do not wish to use the amps REL value for resistance
measurements.
AUTORNG
The AUTORNG option is used to configure autorange for the ohms function. This option allows you to
speed up the autoranging search process by eliminating upper and lower measurement ranges. For
example, if you know that readings do not exceed 1 G
, you can specify the 2 G
range to be the
maximum range. When the instrument autoranges (assuming AUTO range is enabled), it does not
search into the ohms ranges above 2 G
. Note that the 2 T
, 20 T
and 200 T
ranges are not
available for AUTO range.
USE-ALL-RANGES: With this selection, all ohms ranges (except the 2 T
, 20 T
and 200 T
ranges) are used in the autoranging search process.
SET-LIMITS: This selection allows you to specify minimum and maximum ranges in the autoranging
search process:
MIN-AUTO: Use to select the lowest range to which you want the instrument to autorange.
MAX-AUTO: Use to select the highest range to which you want the instrument to autorange.
DAMP
High capacitance seen at the input increases reading noise. This capacitance can be attributed to a
long input cable or to the capacitance of the source, or a combination of both. Enabling damping
reduces this type of noise. However, damping also slows down the response of the measurement.
Do not confuse damping with filtering. Damping is used to reduce noise caused by input capacitance,
while filtering is used to reduce noise caused by a noisy input signal.
ON: Enable current damping
OFF: Disable current damping
