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Section 4: Basic measurements
Volts configuration
The following information explains the various configuration options for the volts function. The
configuration menu is summarized in the table below. This menu is accessed by pressing CONFIG
and then V. Note that a function does not have to be selected in order to be configured. When the
function is selected, it assumes the programmed status.
Volts configuration menu
Menu item
GUARD
EXT-FDBK
SPEED
NORMAL
FAST
MEDIUM
HIACCURACY
SET-SPEED-EXACTLY
SET-BY-RSLN
FILTER
AVERAGING
TYPE
NONE
AVERAGING
ADVANCED
AVERAGING-MODE
MEDIAN
DISABLE
ENABLE
RESOLUTION
AUTO
3.5 d, 4.5 d, 5.5 d, 6.5 d
GUARD
The GUARD option is used to enable or disable guard. When disabled, the inner shell (shield) of the
triaxial connector (and cable) is connected to meter input LO. This mode is used for unguarded
voltage, current and charge measurements. When enabled, the inner shell (shield) of the triaxial
connector (and cable) is connected to guard, which follows the potential of meter input HI. This mode
is used for guarded voltage measurements.
Guard is only in effect when the instrument is in the volts function. In any other function, guard is not
used. The following menu items are used to control GUARD:
ON: Enable guard
OFF: Disable guard
4-4
Description
Enable or disable guard
Enable or disable external feedback mode
Measurement speed (integration time) menu:
Select 1 PLC (power line cycle, 16.67 ms for 60Hz, 20 ms for 50Hz and 400Hz)
Select 0.01 PLC
Select 0.1 PLC
Select 10 PLC
Set integration in PLC (0.01-10)
Default to setting appropriate for resolution
Filter menu:
Configure digital averaging filter:
Select type of average filter:
No average filtering performed
Program a simple average filter (1-100 readings)
Program a simple average filter (1-100 readings) with noise tolerance window
0-100 % of range)
Select moving average or repeating average mode
Configure median filter:
Disable median filter
Enable median filter and specify range (1-5)
Display resolution menu:
Default to resolution appropriate for integration time
Select a specific resolution
Model 6517B Electrometer Reference Manual
6517B-901-01 Rev. C / August 2015
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