Fluke 5725A instruction manual Theory of Operation, Chapter

Chapter 4

Theory of Operation

	Title	Page
4-1.	Introduction	4-3
4-2.	Overall Functional Description	4-3
4-3.	1100V AC Range Functional Description	4-5
4-4.	11A Range Functional Description	4-6
4-5.	Operation in the 11A DC Range	4-7
4-6.	Operation in the 11A AC Range	4-7
4-7.	Voltage and Current Standby Modes	4-7
4-8.	Voltage Standby	4-7
4-9.	Current Standby	4-7
4-10.	How the 5700A and 5725A Communicate	4-8
4-11.	Description of the Out-Guard Lines (5725A Side)	4-8
4-12.	Description of the In-Guard Lines	4-9
4-13.	Functional Summaries by Assembly	4-10
4-14.	Detailed Circuit Description	4-11
4-15.	Interconnect Assembly (A1)	4-11
4-16.	Power Supply Assembly (A4)	4-12
4-17.	High Voltage Supply Section	4-13
4-18.	Switching Section	4-14
4-19.	Current-Limit Section	4-15
4-20.	System Supply Section	4-15
4-21.	Fan Supply Section	4-16
4-22.	Digital Assembly (A5)	4-16
4-23.	Microcomputer	4-16
4-24.	External RAM	4-16
4-25.	External ROM	4-16
4-26.	EEROM	4-18
4-27.	Data Latch	4-18
4-28.	Strobe Lines	4-18
4-29.	Led Driver	4-18

4-1