Fluke 8845A, User Manual

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8845A/8846A
Users Manual
4-8
will source current through the
INPUT HI
and
LO
terminals and use the
SENSE HI
and
LO
to measure the resistance.
Making a Two-wire Resistance Measurement
To make a two-wire resistance measurement:
1.
Connect the test leads to the Meter’s input connectors as shown in Figure 4-1.
2. Press
N
.
0.206220
M
Ω
F1 F2 F3 F4 F5
caw030.eps
3. If not already highlighted as shown above, press the
2W 2WX4W
soft key.
Function modifiers:
D FLTR
A filter for quieting noisy measurments. This filter averages readings
to reduce reading noise when in immedicate trigger mode or when in
trigger mode with an unending number of triggers selected. The filter
is only available for dc functions at rates slower than 1 PLC. The
number of readings averaged by the digital filter varies with dc
function and range.
A FLTR
A 3-pole analog filter for improving noise immunity. The filter is
active when this soft key label is highlighted and will increase
stabilization time of the measurement. See Appendix D for more
information on when to use the analog filter.
Note
For best results, the filter may require zeroing during the
ohms function.
Refer to the “Range Keys” section in Chapter 3 of this manual for information on how to
adjust the measurement range.
Making a Four-wire Resistance Measurement
The Meter incorporates two methods of making a four-wire resistance measurement. The
traditional method is to use four meter leads to connect the Meter to the resistance to be
measured. The optional 2X4 Wire test leads simplifies the four-wire measurement so you
only have to plug in two test leads to the front-panel Input HI and LO connectors of the
meter.
To make a four-wire resistance measurement using four test leads:
1.
Connect the test leads to the Meter’s input connectors as shown in Figure 4-2.
2. Press
N
.