Fluke 8508A User Manual page 46

8508A
Users Manual
OHMS Configuration (Resolution, Filter, Fast, Low Current and 4-Wire Operation)
Press the
Resl
Filt
Fast
LoI
4w&
OHMS Resolution
Press the
5
6
7
8
Refer to table 3-1 for the ADC integration times applicable to the various resolution and
Fast On/Off settings.
To revert to the
3-12
key to see the
Config
Provides selection of the resolution for subsequent readings.
Controls a single-pole analog filter for increased noise rejection.
The Filter annunciator on the left-hand display indicates that the filter is
active.
The pole or time constant of the filter is formed by a
Capacitance of 22 nF across the resistor under test.
Select a higher read rate. This will result in an increase in uncertainty due
to noise.
The Fast annunciator on the left-hand display indicates that the higher read
rate is active.
Controls the measurement currents. The current in use for the selected
range is indicated in the left-hand display together with the maximum
voltage that will appear across the measured resistance at full scale.
Low Current resistance measurement may be desirable to
reduce any self-heating in the device under test or to avoid
conduction of any parallel semi-conductor junction.
Selects 4-wire resistance measurements in which the stimulus current is fed
through the test resistance from the instrument's
terminals. The resulting potential difference is sensed by the
and terminals. Otherwise all measurements are 2-wire, current being
Lo
sourced and potential differenced sensed from the
terminals.
The 4w annunciator in the left-hand display indicates that 4 wire sensing
is active.
key to see the
Resl
5-1/2-digits resolution
6-1/2-digits resolution
7-1/2-digits resolution
8-1/2-digits resolution
OHMS CONFIG
menu.
OHMS CONFIG
OHM CONFIG Menu
Note
Note
menu:
OHMS RESL
OHM RESL Menu
menu, press the
Config
and
INPUT Hi Lo
SENSE Hi
and
INPUT Hi Lo
key.
adj074f.eps
adj075f.eps