Fluke 5790B - Page 29

Theory of Operation
Functional Block Diagram Discussion 2
2-3
BINDING
POSTS
TYPE ‘N’
CONNECTOR
ATTENUATORS
AND
PROTECTION
MODULE
TRANSFER
SWITCH
PROTECTION INTERRUPT
AMPLIFIERS
RMS
SENSOR
A/D
DAC
CPU
M1
CHOPPER
MEASURE INPUT
28 Hz
BINDING
POSTS
TYPE ‘N’
CONNECTOR
ATTENUATORS
AND
PROTECTION
MODULE
PROTECTION INTERRUPT
AMPLIFIERS
RMS
SENSOR
A/D
DAC
CHOPPER
CPU
M2
MEASURE
INPUT=M1
SET
DAC
MEASURE
DAC=M2
M1-M2<
IDELTAI?
NO
YES
ADJUST
DAC
DISPLAY
MEAS
1
MEASURE DAC
2
FLOWCHART
1
2
elu002.eps
Figure 2-1. Functional Block Diagram