ADCMT 6253 - Page 91

6253 DC Voltage Current Source/Monitor Operation Manual
4.1.2 Remote Sensing (2-Wire/4-Wire Connection)
4-3
Figure 4-2 2-Wire and 4-Wire Connections
NOTE: The maximum remote sensing voltage (tolerable voltage difference between OUTPUT
and SENSE) is
 3 V at both the HI and LO sides.
To satisfy the specified accuracy, maintain the following restriction for r
1 to r4.
r
1, r2  3 V/Io [  ] (Io = Output current)
r
3, r4   220 k  [  ]
(Vos = r
1Io, r2Io)
(Example) If Io = 2 A
r
1, r2  3 V/2 A = 1.5 
r1, r2 = 1.5 
Then,
r3, r4   220 k  = 0.73 
An error may occur due to voltage drop at r
1
and r
2
.
(a) 2-wire connection
(b) 4-wire connection
10 V
Vos
10 V
3 V