Campbell CR300 Series Operator's Manual page 39

TABLE 6-1. Resistive-Bridge Circuits with Voltage Excitation
Resistive-Bridge Type and
Circuit Diagram
1,3
Three-Wire Half-Bridge
1,3
Four-Wire Half-Bridge
1,3
Full-Bridge
CR300-Series Datalogger
CRBasic Instruction and
Fundamental Relationship
CRBasic Instruction: BrHalf3W()
Fundamental Relationship 2 :
2���� − ����
���� =
2 1
���� − ����
���� 1
CRBasic Instruction: BrHalf4W()
����
Fundamental Relationship 2 :
���� = =
2
����
1
CRBasic Instruction: BrFull()
Fundamental Relationship :
2
����
���� = 1000 ∙ = 1000 �
1
���� ����
����
����
=
����
����
����
����
����
����
����
���� ����
− �
3 2
+ ���� ���� + ����
3 4 1 2
29