Keithley 486

SECTION 5 - Performance Verification
5.1 INTRODUCTION
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5.2 ENVIRONMENTALCONDITIONS
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5.3 INITIALCONDITIONS
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5.4 REQUIREDTESTEQUIPMENT
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5.5 VERIFICATION PROCEDURES ........................................................
5.5.1 PicoammeterVeri~cation..
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5.5.2 Voltage Source Verification (Model 487). ...............................................
SECTION 6 - Theory of Operation
6.1
INTRODUCTION
6.2 ANALOG CIRCUITS.
6.2.1 Input Amplifier.
6.2.2 Analog Filter
6.2.3 Multiplexer . ..__. .., ., ,., ._, ,_
6.2.4 +2.8V Reference
6.2.5 Analog Output
6.2.6 Voltage Source (Model 487).
6.3 ANALOG CONTROL CIRCUITRY.
6.4
A/D CONVERTER
6.5 DIGITAL CIRCUITS
6.5.1
Digital Block Diagram.
6.5.2
Microcomputer
6.5.3 Display/Keyboard.
6.5.4 IEEE-488 Interface .
6.6 POWER SUPPLIES
6.6.1 ACLineInput..........................
6.6.2
*15V Supplies
6.6.3
+5VA Supply. .
6.6.4
+6.5V Supply.
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SECTION 7 - Maintenance
7.1 INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . .._.
7.2 LINE FUSE REPLACEMENT.
7.3
CALIBRATION.
7.3.1
Recommended Calibration Equipment.
7.3.2
Environmental Conditions
7.3.3
CAL LOCK Switch.
7.3.4 Warm-Up Period.
7.3.5 Front Panel Calibration
7.3.6 IEEE-488 Bus Calibration . .
7.4 HANDLING AND CLEANING PRECAUTIONS
7.5 DISASSEMBLY................................
7.5.1 CoverRemoval..............................
7.5.2 Shield Removal.
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