Fluke 8508A User Manual page 43

ACV Configuration (4 wire Sense, Resolution, RMS Filtering, Transfer mode, DC-
Coupled and Spot Frequency)
Press the
Config
Allows operation with calibrators which provide a remote 4 wire sensing
4wV
capability by providing, at an internal reference plane within the DMM,
connections between
SENSE LO
AC transfer, or 4wire AC – DC transfer applications.
The 4wV annunciator in the left-hand display indicates that 4-wire sensing
is active.
Provides selection of the resolution for subsequent readings.
Resl
Provides selection of various filters for the RMS converter, allowing
Filt
measurements to be made down to the chosen filter frequency. One of four
filters is always in circuit. The 40Hz filter is the default selection at power
on.
The Filter annunciator on the left-hand display indicates that the filter is
active and indicates its frequency.
Controls the internal electronic AC-DC transfer for AC measurement,
Tfer
improving linearity and temperature performance at the expense of read
rate.
The Tfer annunciator on the left-hand display indicates that internal AC-
DC transfer is active.
DC couples the input circuitry to include DC signal components in the AC
DCcp
measurement when selected.
The DC coupled annunciator in the left-hand display indicates active state.
Selects the Spot Frequency measurement mode, where calibration
Spot
constants derived for up to six previously calibrated spots (Sp1 thru 6) are
applied for signal frequencies within ± 10 % of a spot frequency. This can
be used to significantly reduce flatness errors in Sine Wave (low crest
factor) measurement applications.
The Spot annunciator on the left-hand display indicates that Spot
corrections are active.
key to see the
ACV CONFIG
ACV CONFIG Menu
INPUT HI
. Use of an internal reference plane can be helpful in 4wire AC,
on is the default selection at power on.
Tfer
Using the Measurement Functions
menu.
and and between
SENSE HI
Making Measurements
adj067f.eps
and
INPUT LO
3
3-9