Load Transient Response Time | Agilent Technologies E3631A guide

Chapter 3 Calibration Procedures

Constant Voltage (CV) Verifications

Load Transient Response Time

This test measures the time for the output voltage to recover to within 15 mV of nominal output voltage following a load change from full load to half load, or half load to full load.

1Turn off the power supply and connect the output to be tested as shown in Figure 3-1with an oscilloscope. Operate the electronic load in constant current mode.

2Turn 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 to the maximum programmable value and the voltage to the full-scale value (see Table 3-2).

3Set the electronic load to transient operation mode between one half of the output's full scale value and the output's full scale value at a 1 kHz rate with 50% duty cycle.

4Set the the oscilloscope for ac coupling, internal sync, and lock on either the positive or negative load transient.

5Adjust the the oscilloscope to display transients as shown in Figure 3-2. Note

that the pulse width (t2-t1) of the transients at 15 mV from the base line is no more than 50 msec for each of the three outputs.

6Repeat steps (1) through (5) for the remaining outputs.

3

Figure 3-2. Transient Response Time

53

Image 54

Agilent Technologies E3631A manual Load Transient Response Time

Contents

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