Making Measurements
Using the Measurement Functions
3
ACV Configuration (4 wire Sense, Resolution, RMS Filtering, Transfer mode, DC-
Coupled and Spot Frequency)
Press the
Config key to see the ACV CONFIG menu.
adj067f.eps
ACV CONFIG Menu
Allows operation with calibrators which provide a remote 4 wire sensing
capability by providing, at an internal reference plane within the DMM,
connections between
INPUT HI and SENSE HI and between INPUT LO and
SENSE LO. Use of an internal reference plane can be helpful in 4wire AC,
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.
Provides selection of various filters for the RMS converter, allowing
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,
improving linearity and temperature performance at the expense of read
rate.
Tfer on is the default selection at power on.
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
measurement when selected.
Note
DC-coupled should be selected for signal frequencies
less than 40 Hz.
The DC coupled annunciator in the left-hand display indicates active state.
Selects the Spot Frequency measurement mode, where calibration
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.
3-9
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