4-8
Ohms Measurements
2400 Series SourceMeter
®
User’s Manual
Figure 4-3
4-wire resistance sensing
Sense selection
Use the following procedure to select 2-wire or 4-wire sense operation:
1.
Press CONFIG then
Ω
to display the ohms configuration menu.
2.
Select SENSE MODE, then press ENTER.
3.
Select 2-WIRE or 4-WIRE as desired, then press ENTER.
4.
Press EXIT to return to normal display.
SourceMeter
4-wire Sense HI
4-wire Sense LO
I
Input/Output HI
V
M
V
R
Test Current (
I
)
Resistance
Under Test
Lead
Resistances
R
S
R
LEAD
R
LEAD
= Current sourced by SourceMeter
= Voltage measured by SourceMeter
= Voltage across resistor
I
V
M
V
R
and measured resistance = =
V
M
I
V
M
Sense Current (pA)
Input/Output LO
R
LEAD
R
LEAD
Because sense current is negligible, =
V
M
V
R
I
V
R
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Содержание SourceMeter 2400
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