Making A Four-Wire Resistance Measurement - Tektronix DMM4040 User Manual

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.
3. If not already highlighted as shown above, press the 4WIRE soft key to switch to a
four-wire measurement.
Figure 4-2. Input Connections for 4-wire Resistance Measurements
Note
For best results, the filter may require zeroing during the
ohms function.
0.217384
F1 F2 F3
Making Measurements
F4 F5
INPUT
V
2W/4W 2
HI
1000 V CAT I
600V CAT II
LO
FUSED
400
mA
REAR
Measuring Resistance
caw031.eps
SENSE
4 W
HI
300V
LO
1V
10A
FRONT
caw023.eps
4
4-9