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© National Instruments Corporation 11 SCXI-1321 Terminal Block Installation Guide
Figure 4. Half-Bridge Nulling Circuit
CH+CH+
CH–
EX+
EX–
+
–
+
–
R
1
R
2
4.5 kΩ
4.5 kΩ
R
SCAL
301 kΩ
R
Tr im
10 kΩ
R
Null
39.1 kΩ
(Screw Adjusts Potentiometer)
R
L
R
L
R
L
R
4
(gauge)
EX+
CH+
CH+
CH–
EX+
EX–
R
Tr im
SCXI-1121 SCXI-1321 Transducer
V
EX
EX–
R
3
(gauge)
Note: R
1
and R
2
are completion resistors.