Half-bridge measurement

Typical half-bridge measurement connection shows a typical connection for half-bridge measurements, such as 107 temperature sensors. Using this method, a data logger can make up to 48 half-bridge measurements through a multiplexer. See AM16-32B Example B-5 CR6 107 temperature probe measurements.CR6 and Wiring for Campbell Scientific 107 temperature sensors CRBasic example for the program and wiring diagram, or use Short Cut to create the program. With minor adjustments, the CR6 program can be used with the CR3000, CR1000X, CR800 series, CR300 series, or CR1000. This program measures 48 Campbell Scientific 107 temperature sensors through an AM16/32B. The AM16/32B must be in 4x16 mode.

Typical half-bridge measurement connection

NOTE:

U terminals are only available on the CR6 data logger.

Wiring for Campbell Scientific 107 temperature sensors CRBasic example
CR6	AM16/32B in 4X16 mode		Sensors
CR6	Control and COM terminals	Measurement terminals	Sensors
U3	COM ODD H	Odd-numbered H terminal	Sensor 1, 2, and 3 excitation (black wire)
U4	COM ODD L	Odd-numbered L terminal	Sensor 1 signal (red wire)
U5	COM EVEN H	Even-numbered H terminal	Sensor 2 signal (red wire)
U6	COM EVEN L	Even-numbered L terminal	Sensor 3 signal (red wire)
⏚ (Signal Ground)	COM		Sensor 1, 2, and 3 grounds and shields (purple and clear wires)
12V	12V
G	G
U1	CLK
U2	RES