Campbell Manufacturing CR10 Description, Description, Instr. # Circuit, Instr. # Circuit, SECTION 13. CR10 MEASUREMENTS, TABLE 13.5-1.Comparison of Bridge Measurement Instructions

SECTION 13. CR10 MEASUREMENTS

FIGURE 13.5-2. Excitation and Measurement Sequence for 4 Wire Full Bridge

	TABLE 13.5-1. Comparison of Bridge Measurement Instructions
Instr. # Circuit	Description	Instr. # Circuit	Description

4	DC Half Bridge	The delay parameter
		allows the user entered
		settling time com-
		pensate for capacitance
		in long lead lengths. No
		polarity reversal. One
		single-ended measure-
		ment. Measured
		voltage output.
5	AC Half Bridge	Rapid reversal of
		excitation polarity for
		ion depolarization.
		One single-ended
		measurement at each
		excitation polarity.
		Ratiometric output.
6	4 Wire	One differential
	Full Bridge	measurement at each
		excitation polarity.
		Ratiometric output.

7	3 Wire	Compensates for lead
	Half Bridge	wire resistance,
		assuming resistance is
		same in both wires.
		Two single-ended
		measurements at each
		excitation polarity.
		Ratiometric output.
8	Differential	Makes a differential
	Measurement	measurement without
	with Excitation	reversing excitation
		polarity. Used for fast
		measurements on load
		cells, PRTs etc.
		Resolution and
		common mode rejection
		worse than 6 if used
		with delay = 0.
		Measured voltage
		output.
9	6 Wire	Compensates for lead
	Full Bridge	wire resistance. Two
	or 4 Wire	differential measure-
	Half Bridge	ments at each
		excitation polarity.
		Ratiometric output.

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