F
IXTURES
P
AGE
5-20 V
OLTECH
AT
I
U
SER
M
ANUAL
4-wire measurement circuit
The current flowing is the same:
I = 100.0mV / 1014m
Ω
Ω
Ω
Ω
= 98.62mA
But the voltage measured is now: 1.000
Ω
x 98.6mA = 98.6mV
And the dc resistance calculated is:
V
M
/R = 98.6mV / 98.6mA = 1.000
Ω
Ω
Ω
Ω
4-wire R = 1.000
Ω
Ω
Ω
Ω
– The correct result.
In general, a true Kelvin connection provides the most accurate means of
sensing the voltage across any impedance (AC or DC) and hence helps to
produce an accurate measurement of that impedance without errors due to
lead and contact resistance. The voltage measured can also be used to trim
Vm to the desired voltage.
R = 1.000
Ω
V = 100mV
Vm
RL
RL
RL
RL
RL
I
Im 0
≅
I
I
RC
RC
RC
RC
RC
2m
Ω
2m
Ω
2m
Ω
2m
Ω
2m
Ω
2m
Ω
5m
Ω
5m
Ω
5m
Ω
5m
Ω
5m
Ω
5m
Ω
P-
P+
S-
S+
2m
Ω
5m
Ω
Summary of Contents for AT360
Page 8: ...INTRODUCTION PAGE 1 2 VOLTECH ATI USER MANUAL...
Page 10: ...INTRODUCTION PAGE 1 4 VOLTECH ATI USER MANUAL...
Page 35: ...VOLTECH ATI USER MANUAL PAGE 2 1 2 Getting Started...
Page 36: ...GETTING STARTED PAGE 2 2 VOLTECH ATI USER MANUAL...
Page 102: ...GETTING STARTED PAGE 2 68 VOLTECH ATI USER MANUAL...
Page 123: ...VOLTECH ATI USER MANUAL PAGE 3 1 3 PROGRAM EDITOR...
Page 124: ...PROGRAM EDITOR PAGE 3 2 VOLTECH ATI USER MANUAL...
Page 151: ...PROGRAM EDITOR VOLTECH ATI USER MANUAL PAGE 3 29 Minimum limit only Maximum limit only...
Page 172: ...PROGRAM EDITOR PAGE 3 50 VOLTECH ATI USER MANUAL...
Page 173: ...VOLTECH ATI USER MANUAL PAGE 4 1 4 AT SERIES SERVER...
Page 174: ...AT SERIES SERVER PAGE 4 2 VOLTECH ATI USER MANUAL...
Page 176: ...AT SERIES SERVER PAGE 4 4 VOLTECH ATI USER MANUAL...
Page 225: ...VOLTECH ATI USER MANUAL PAGE 5 1 5 FIXTURES...
Page 226: ...FIXTURES PAGE 5 2 VOLTECH ATI USER MANUAL...
Page 228: ...FIXTURES PAGE 5 4 VOLTECH ATI USER MANUAL...
Page 248: ...FIXTURES PAGE 5 24 VOLTECH ATI USER MANUAL...
Page 249: ...VOLTECH ATI USER MANUAL PAGE 6 1 6 FRONT PANEL MODES...
Page 250: ...FRONT PANEL MODES PAGE 6 2 VOLTECH ATI USER MANUAL...
Page 252: ...FRONT PANEL MODES PAGE 6 4 VOLTECH ATI USER MANUAL...
Page 299: ...VOLTECH ATI USER MANUAL PAGE 7 1 7 TESTS AND TEST CONDITIONS...
Page 425: ...VOLTECH ATI USER MANUAL PAGE 8 1 8 SPECIFICATIONS...
Page 426: ...SPECIFICATIONS PAGE 8 2 VOLTECH ATI USER MANUAL...
Page 461: ...VOLTECH ATI USER MANUAL PAGE 9 1 9 WARRANTY AND SERVICE...
Page 462: ...WARRANTY AND SERVICE PAGE 9 2 ATI USER MANUAL...
Page 464: ...WARRANTY AND SERVICE PAGE 9 4 ATI USER MANUAL...