Common Mode Current Noise | Agilent Technologies E3631A specs

Chapter 3 Calibration Procedures

Constant Voltage (CV) Verifications

Common Mode Current Noise

The common mode current is that ac current component which exists between any or all outputs or output lines and chassis ground. Common mode noise can be a problem for very sensitive circuitry that is referenced to earth ground.

When a circuit is referenced to earth ground, a low level line-related ac current will flow from the output terminals to earth ground. Any impedance to earth ground will create a voltage drop equal to the output current flow multiplied by the impedance.

1Turn off the power supply and connect a 100 kW resistor (RS) and a 2200 pF capacitor in parallel between the (-) terminal and chassis ground for +6V output or between the (COM) terminal and chassis ground for ±25V outputs.

2Connect a digital voltmeter across RS.

3Turn on the power supply and select the output to be tested using the meter and adjust 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 of the selected output to the maximum programmable value and the voltage to the full-scale value (see Table 3-2).

4Record the voltage across RS and convert it to current by dividing by the resistance (DVM reading/100 kW). Note that the current is less than 1.5 mA for each of the three outputs.

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

52

Image 53

Agilent Technologies E3631A manual Common Mode Current 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 Quick Start To prepare the power supply for use To prepare the power supply for useConnect the power cord and turn on the power supply Enable the outputs 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 Turn on the storage mode Set up the power supply for the desired operating stateTo store and recall the instrument state Quick Start 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 TestsSelf-Test Performance Verification Tests Measurement Techniques Setup for Most Tests Current-Monitoring Resistor Calibration Procedures Constant Voltage CV Verifications Constant Voltage Test SetupConstant Voltage CV Verifications Voltage Programming and Readback Accuracy MEASVOLT? P6VP25VN25V CV Load Regulation CV Line Regulation Normal Mode Voltage Noise CV Ripple and Noise Common Mode Current Noise Load Transient Response Time Calibration Procedures Constant Current CC Verifications Constant Current Test SetupConstant Current CC Verifications Current Programming and Readback Accuracy 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 Calibration Procedures Error Messages Error MessagesSystem Error Messages Self-Test 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 Is the Power Supply Inoperative? Operating ChecklistDoes the Power Supply Fail Self-Test? Service Operating Checklist Standard Repair Service worldwide Types of Service AvailableService Types of Service Available Express Exchange U.S.A. only Repacking for Shipment Service Repacking for Shipment To Replace the Power-Line Fuse Electrostatic Discharge ESD PrecautionsService Electrostatic Discharge ESD Precautions Surface Mount Repair Unit Reports Errors 740 to Troubleshooting HintsService Troubleshooting Hints Unit is Inoperative Bias Supplies Problems Power-On Self-Test Self-Test ProceduresService Self-Test Procedures Complete Self-Test 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