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6012A
Operating and service manual
HP 6012A Operating And Service Manual
Autoranging dc power supply
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Table Of Contents
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Contents
Table of Contents
Troubleshooting
Table of Contents
Safety Information
Table of Contents
Description
Instrument and Manual Identification
Options
Accessories
Specifications
Meters and Indicators
Multiple Unit Operation
Temperature Ratings
Backpressure
Installation
Initial Inspection
Repackaging for Shipment
Location and Cooling
Input Power Requirements
Power Connection
Power Cord Preparation
AC Line Impedance Check
Line Voltage Option Conversion
Rack Mounting
Operating Instructions
Turn-On Checkout Procedure
Connecting the Load
Front Panel Controls and Indicators
Copper Wire Current-Carrying Capacity
Connecting a Bypass Capacitor
Protective Circuits
Operating Modes
Normal Operating Mode
Normal Strapping
Constant Voltage Operation
Constant Current Operation
Overvoltage Protection (OVP)
Overrange
Remote Voltage Sensing
Remote Programming
Resistance Programming of Output Voltage
Voltage Programming of Output Voltage
Scaled Voltage Programming of Output Voltage
Current Programming of Output Voltage
Resistance Programming of Output Current
Voltage Programming of Output Current
Auto-Parallel Operation
Scaled Voltage Programming of Output Current
Current Programming of Output Current
Auto-Series Operation
Setting the Voltage and Current Controls
Overvoltage Protection in Auto-Parallel
Auto-Parallel with Remote Sensing
Resistor Values
Auto-Tracking Operation
Overvoltage Protection in Auto-Series
Auto-Series with Remote Sensing
Setting the Current Controls
Auto-Tracking with Remote Programming
I-Monitor Output Signal
Principles of Operation
Autoranging Power Supply Vs. Conventional Power Supply
Simplified Schematic Description
Input AC Circuits
Simplified Schematic
Constant Voltage (CV) Circuit
Constatr Circuit (CC) Circuit
Control Voltage
Pulse Width Modulator (PWM)
PWM Fast Turn off
FET Control Signals Timing Diagram
Primary Current (Ip) Limit
Down Programmer
Overvoltage Protection Circuit (OVP)
Bias Voltage Detector
Maintenance
Test Equipment Required
Performance Test
Measurement Techniques
Constant Voltage Tests
Select a Load
Load Effect (Load Regulation)
Source Effect (Line Regulation)
PARD (Ripple and Noise)
Ripple Measurement Techniques
Ripple Measurement Procedure
Noise Spike Measurement
Load Transient Recovery Time
Temperature Coefficient
Drift (Stability)
Constant-Current Tests
Current Output and Ammeter Accuracy
Troubleshooting
Overall Troubleshooting Tree
Troubleshooting Bias Supplies
Overall Trouble Isolation
Slow Start Setup
Bias Voltage Check
Slow Start Procedure
Relay Driver
Clock and PWM
FET Assemblies
CV Circuit
Repair and Replacement
Outside Cover Removal
CC Circuit
OVP Circuit
A2 Control Board Removal
A3 FET Boards and A4 Output Diode Board Removal
FET Board Disassembly
Output Diode Board Disassembly
A1 Main Board Removal
Relay K1 Removal
Component Access through Bottom Chassis
Front Panel Removal
Adjustment and Calibration
Meter Zero Adjustment
Ip Limit Adjustment
Constant Voltage Offset Adjustment
Constant-Current-Source Adjustment
Ammeter Adjustment/Voltmeter Adjustment
Replaceable Parts
Component Location Illustrations and Circuit Diagrams
System Option 002
System Option 002 Installation and Operation
Connector Assembly Procedure
Resistance Control
Voltage Control
Current Control
Resistance Programming of Output Voltage And/Or Current
Remote Monitoring
Calculating Value of Series Dropping Resistor
Status Indicators
Remote Control
Remote Reset
Power-On Preset
Multiple Supply System Shutdown
Remote/Local Programming
Bias Supplies
Option Board Maintenance
Removal of the Option Board
Troubleshooting Resistance and Voltage Programming
Troubleshooting Current Programming
Troubleshooting Status Indicators
Bias Supply Adjustments
Troubleshooting Remote Shutdown
+15 V Supply Adjustment
-15 V Supply Adjustment
Logic Symbols and Definitions
Indicator and Qualifier Symbols
Option 002 Board Component Location
Option 002 Schematic Diagram
100 Vac Input Power Option 100
Quick Links
Table of
Contents
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Table of Contents
Troubleshooting
Troubleshooting
38
Overall Troubleshooting Tree
39
Troubleshooting Bias Supplies
40
Option Board Maintenance
77
Troubleshooting Status Indicators
78
Bias Supply Adjustments
79
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