Agilent Technologies E3631A guide

Chapter 3 Calibration Procedures

Constant Current (CC) Verifications

Normal Mode Current Noise (CC Ripple and Noise)

The normal mode current noise is specified as the rms output current in a frequency range 20 Hz to 20 MHz with the power supply in constant current operation.

1Turn off the power supply and connect the output to be tested as shown in Figure 3-1with a load resistor (1.29 for +6V supply and 259 for ±25V supplies) across output terminals to be tested. Connect a rms voltmeter across the load resistor. Use only a resistive load for this test.

2Turn on the power supply and select the output to be tested using the meter selection key on the front panel. Enable the outputs and set the display to the limit mode. When the display is in the limit mode, program the current to full- scale value and the voltage to the maximum programmable value.

3The output current should be at the full-scale rating with the CC annunciator on. If not lit, adjust the load so that the output voltage drops slightly until the CC annunciator lights.

4Divide the reading on the rms voltmeter by the load resistance to obtain rms current. The readings should be within the limit specified below for each output tested.

Output	Specification

+6V	2 mA

+25V	0.5 mA

-25V	0.5 mA

5Repeat steps (1) through (4) for the remaining outputs.

58

Image 59

Agilent Technologies E3631A manual Normal Mode Current Noise CC Ripple and Noise

Contents

3DUW1XPEHU $SULO Service Guide Flexible system features Convenient bench-top features Front Panel at a Glance Before performing calibration T e Front-Panel Voltage and Current Settings Display Annunciators Rear Panel at a Glance This Book Page Contents Theory of Operation Contents Calibration ProceduresService Replaceable Parts Contents ServiceBackdating Schematics Contents Specifications Specifications Specifications Performance Specifications Performance Specifications Specifications Performance Specifications Voltage Programming Speed Supplemental Characteristics Specifications Supplemental Characteristics Dimensions of Agilent E3631A Power Supply Specifications Supplemental Characteristics Quick Start Quick Start Enable the outputs To prepare the power supply for useQuick Start To prepare the power supply for use Connect the power cord and turn on the power supply 100 or 115 Vac, 2.5 AT fuse 230 Vac, 2 AT fuse Turn on the power supply To check the rated voltages of the power supplyQuick Start To check the rated voltages of the power supply Check the voltage function for the -25V supply Adjust the voltage limit value to 1.0 volt To check the rated currents of the power supplyQuick Start To check the rated currents of the power supply Check the current function for the -25V supply Check the current function for the +25V supply Connect a load to the desired output terminals To use the power supply in constant voltage modeSet the display for the limit mode Return to the meter mode Adjust the knob for the desired output voltage Quick Start To use the power supply in constant current mode To use the power supply in constant current mode Verify that the power supply is in the constant current mode Adjust the knob for the desired output current Verify that ±25V supplies track each other properly To use the power supply in track modeQuick Start To use the power supply in track mode Quick Start To store and recall the instrument state Set up the power supply for the desired operating stateTurn on the storage mode To store and recall the instrument state Recall the stored operating state Turn on the recall modeRestore the operating state To rack mount the power supply To rack mount the power supply Quick Start To rack mount the power supply Calibration Procedures Calibration Procedures Calibration Interval Agilent Technologies Calibration Services Recommended Test Equipment Automating Calibration Procedures Test Considerations U t i o n Calibration Procedures Test Considerations Performance Verification Tests Calibration Procedures Performance Verification TestsPerformance Verification Tests Self-Test Measurement Techniques Setup for Most Tests Current-Monitoring Resistor Voltage Programming and Readback Accuracy Constant Voltage Test SetupCalibration Procedures Constant Voltage CV Verifications Constant Voltage CV Verifications MEASVOLT? P6VP25VN25V CV Load Regulation CV Line Regulation Normal Mode Voltage Noise CV Ripple and Noise Common Mode Current Noise Load Transient Response Time Current Programming and Readback Accuracy Constant Current Test SetupCalibration Procedures Constant Current CC Verifications Constant Current CC Verifications MEASCURR? P6VP25VN25V CC Load Regulation CC Line Regulation Normal Mode Current Noise CC Ripple and Noise CV Performance Test Record Performance Test Record for Agilent E3631A CC Performance Test Record Calibration Security Code Calibration Procedures Calibration Security Code Move to the security code by pressing the Secure key To Unsecure the Power Supply for CalibrationTurn on the front-panel calibration mode Unsecured Turn off the calibration mode To Unsecure the Power Supply Without the Security Code Calibration Message Calibration Procedures Calibration CountCalibration Count General Calibration/Adjustment Procedure Cal mode Hi +5.7000v Hi +4.750 a Lo +0.100 aLo +0.099 a Hi +4.999 a Cal setup Aborting a Calibration in Progress Calibration Procedures Aborting a Calibration in Progress Calibration Record for Agilent E3631A Calibration Procedures Calibration Record for Agilent E3631A Self-Test Error Messages Error MessagesCalibration Procedures Error Messages System Error MessagesPage Calibration Program Calibration Procedures Calibration Program END if Output Calibration Procedures Calibration Program Theory of Operation Theory of Operation Theory of Operation Block Diagram Overview Block Diagram Overview Block Diagram Theory of Operation AC Input and Bias Supplies AC Input and Bias Supplies Theory of Operation Floating Logic Floating Logic Serck Xfpsk Theory of Operation To-A Converter To-A Converter Theory of Operation To-D Converter To-D Converter Theory of Operation Power Mesh and Control Power Mesh and Control Theory of Operation Power Mesh and Control Theory of Operation Earth-Referenced Logic Earth-Referenced LogicFront Panel Service Service Service Operating Checklist Operating ChecklistIs the Power Supply Inoperative? Does the Power Supply Fail Self-Test? Express Exchange U.S.A. only Types of Service AvailableStandard Repair Service worldwide Service Types of Service Available Repacking for Shipment Service Repacking for Shipment Surface Mount Repair Electrostatic Discharge ESD PrecautionsTo Replace the Power-Line Fuse Service Electrostatic Discharge ESD Precautions Unit is Inoperative Troubleshooting HintsUnit Reports Errors 740 to Service Troubleshooting Hints Bias Supplies Problems Complete Self-Test Self-Test ProceduresPower-On Self-Test Service Self-Test Procedures 100 101 Service Self-Test Procedures 102 Replaceable Parts To Order Replaceable Parts E3631-60002 Top PCB Assembly 106 107 108 109 110 CR1 CR2 E3631-60003 VFD Assembly E3631-60004 Bottom PCB Assembly E3631-60004 Bottom PCB Assembly 113 114 115 E3631-60005 Power SupplyAssembly E3631-60005 Front Frame Assembly Manufacturer’s List Manufacturer’s List 118 Backdating Lqfoxghglqwklvfkdswhu Schematics ‡ $&DQG$&6FKHPDWLFSDJH ‡ &RPSRQHQW/RFDWRUSDJHPage Page Page Page Page Page Page Page Page Page Warranty