Manuals / Agilent Technologies / Lawn and Garden / Yard Vacuum

Agilent Technologies e4418b Troubleshooting, Introduction, All/Other, Start, Serial Interface

Models: e4419b e4418b

1 144

Download 144 pages 36.25 Kb

Page 118

All/Other

Troubleshooting

Introduction

All/Other

Figure 6-4: Troubleshooting Guide - RS232/422 Interface

Start

Power up

meter

No

POST

Yes

Pass?

Select

System/Inputs

Which POST Test

Remote Interface

failed?

Select Interface

RS422

Select

Investigate power meter failure

Serial Interface

Select

System/Inputs

Remote Interface

Select Interface

GPIB (IEEE 488)

Prev

Command Set

SCPI

Connect power meter to a GP-IB controller and send the command “*RST”

Did power	Yes
meter reset?

No

Connect RS422 Self Test

Connector to RS232/422

Connector on rear panel

Select

System/Inputs

More

Service

Self Test

Individual

More

Serial Interface

RS422 Loop Back

Run Test

Yes

No Test Pass?

No

Done

System/Inputs

Remote Interface

Select Interface

RS232

Connect RS232 Self Test Connector to RS232/422 Connector on rear panel

Select

System/Inputs

More

Service

Self Test

Individual

More

Serial Interface

RS232 Loop Back

Run Test

Test Pass?

Yes

A2 Processor assy	A4 Comms assy
defective	defective

No fault found with RS232/422 serial interface check user application/ implementation

End

6-10	Agilent E4418B/E4419B Service Guide

Image 118

Agilent Technologies e4418b, e4419b manual Troubleshooting, Introduction, All/Other, Start, Serial Interface

Contents

Agilent Technologies E4418B/E4419B Power Meters Service GuideCopyright 1998, 2003Agilent Technologies Agilent E4418B/E4419B Service GuidePrinted in the UK Legal Information WarrantyCertification Limitation of Warranty Exclusive RemediesEquipment Operation Personal Safety ConsiderationsWarnings and Cautions General Safety Considerations MarkingsStatement of Compliance Installation InstructionsIEC 1010-1 Compliance User EnvironmentList of Related Publications Agilent E4418B/E4419B Service Guide is available by ordering OptionSales and Service Offices Latin America EuropeUnited States Returning Your Power Meter for Service Package the Power Meter for ShipmentChapter 3 Adjustments About this GuideChapter 1 Specifications Chapter 6 TroubleshootingTable of Contents PageSpecification Test SetupProcedure Test ProcedureMeasurement Uncertainty Analysis Instrument Accuracy Test1 Measurement Uncertainty Analysis Power Reference Level Test1 Specifications Introduction IntroductionPower Range Power Meter SpecificationsMeter Power SensorsPower Sensor AccuracyTable 1-1 Zero Set Specifications Instrumentation1 mW Power Reference1 50 MHz nominalMeasurement Speed Power Meter Supplemental CharacteristicsZero Drift of Sensors Normal Mode Measurement NoiseNoise Multiplier Noise MultiplierZero Drift Measurement NoiseSettling Time s Settling TimeFor Agilent 8480 series power sensors Normal ModeNormal Mode For Agilent E-series power sensorsSettling Time s Response Time sMaximum dBm Normal Modex2 Mode Maximum dBmZero Drift Power Sensor SpecificationsDefinitions Zero Set Measurement NoiseWeight Battery Option 001 Operational CharacteristicsService Life Typical Operating TimeLine Power General CharacteristicsRear Panel Connectors Recorder OutputsOperating Environment Environmental CharacteristicsGeneral Conditions Storage ConditionsSafety DimensionsWeight GeneralCommand Language Remote ProgrammingNon-Volatile Memory Battery1-18 Agilent E4418B/E4419B Service GuideSpecifications GeneralPerformance Tests User’s Guide IntroductionPerformance Tests Table 2-1 Required Equipment Equipment RequiredCritical Specification EquipmentPerformance Tests Test ProceduresPerformance Test Record Calibration CycleZero Test SpecificationTest Setup DescriptionProcedure Input SettingsSpecification Test ProcedureInstrument Accuracy Test DescriptionFigure 2-2 Instrument Accuracy Test Setup Test SetupProcedure ConfirmWhen switching the range calibrator to STANDBY, allow enough 10 ∝W 3 ∝W30 ∝W Figure 2-3 Instrument Accuracy Average Path Test Setup Test ProcedureTest Setup EquipmentThere is a small risk of mild electrical shock from the Procedurethe power meter is connected chassis of the 11683A option H01 range calibrator unlessInput Settings , More Table 2-4 Instrument Accuracy Results Description Power Reference Level TestCharacteristics ElectricalEquation 2-4 Power Level Provided By The Reference Oscillator Figure 2-4 Power Reference Level Test Setup Test SetupProcedure PowerActual Result Press , Power Ref OnTable 2-5 Power Reference Level Test Result 0.999 mWProcedure Agilent E-Series Power Sensor Interface TestAgilent E-Series Power Sensor Interface Test Figure 2-5 Sensor Functional Test Setup Agilent E-Series Power Sensor Functional TestProcedure DescriptionFigure 2-6 Sensor Functional Test Setup with Attenuator Table 2-6 Functional Test Result Performance Test Record Performance Test Record1. This test is not channel related Adjustments power applied to the instrument and with protective Safety ConsiderationsAdjustments described in this chapter are performed with covers removed. Maintenance should be performed only byAssembly Replaced Post-Repair AdjustmentsTable 3-1 Post Repair Adjustments, Tests, and Checks Related Adjustments, PerformanceFigure 3-1 Adjustment Setup Power Reference Oscillator Frequency AdjustmentProcedure DescriptionFigure 3-2 A2L9 Adjustment Location Power Reference Oscillator Level Adjustment Power Reference Oscillator Level AdjustmentDescription Thermistor Mount + INPUTINPUT VcompProcedure EquipmentPower Ref On Zero CalMeasurement Uncertainty Figure 3-4 A2R90 Adjustment LocationProcedure Display Brightness and Contrast AdjustmentIntroduction ServiceDisplay Brightness and Contrast Adjustment Agilent E4418B/E4419B Service GuideAdjustments 3-12Theory of Operation Theory of Operation IntroductionIntroduction A1 Power Supply/Battery Charger A1 Power Supply/Battery ChargerA2 Processor Assembly A2 Processor AssemblyAgilent E4418B/E4419B Service Guide The microcontroller circuits that control all the above functions, and pressing System , More , Service , Self Test, Individual A3 Front Panel AssemblyDisplay A4 Comms Assembly A4 Comms AssemblyA5 Daughter Assembly A5 Daughter AssemblyA6 Measurement Assembly A6 Measurement AssemblyAgilent 8480 series power sensors this is 0 V and -10 V at 217 Hz A8 Rechargeable Battery Assembly A8 Rechargeable Battery AssemblyRemove this page and replace with pullout.fm Agilent E4418B/E4419B Service GuideA8 Rechargeable Battery Assembly 4-134-14 Agilent E4418B/E4419B Service GuideA8 Rechargeable Battery Assembly Theory of OperationReplaceable Parts Introduction Replaceable PartsDescription Assembly Part NumbersReference Agilent PartAgilent Part ReferenceDescription DesignatorPower Supply Assembly Types Front Panel Connector Repair Front Panel Connector RepairFirmware Upgrades Downloading FirmwareAssembly and Disassembly Guidelines Removing the Power Meter CoverRemoving the A1 Power Supply Assembly Removing the A2 Processor Assembly n n nRemoving the A4 Comms Assembly screwsRemoving the A5 Daughter or A6 Measurement Assemblies 2. Remove the pins which attach the fan to the chassis Removing the A7 Fan Assembly1. Remove the A1 power supply assembly as shown on page Agilent E4418B/E4419B Service GuideThis power meter uses a lithium battery which may explode if Removing the Power Meter RAM Battery BT1battery terminals or to excessive heat Removing the A3 Front Panel Assembly Replacing the Front Panel Power Sensor Cable Assemblies Front panel sensor retaining clip recess5-17 Agilent E4418B/E4419B Service GuideAssembly and Disassembly Guidelines Replaceable PartsReplacing the Front Panel Power Reference Cable Assembly Rear panel sensor retaining clip recess 5-20 Agilent E4418B/E4419B Service GuideAssembly and Disassembly Guidelines Replaceable PartsReplacing the Rear Panel Power Reference Cable Assembly Option Replacing the Rear Panel Recorder Outputs Cable Assembly Replacing The Chassis Assembly 5-24 Agilent E4418B/E4419B Service GuideAssembly and Disassembly Guidelines Replaceable PartsTroubleshooting Troubleshooting Suggested Diagnostic EquipmentIntroduction Connect Sensor to Channel A Any Sensor Errors? TroubleshootingStart Power Up meter POST Pass? Self Test Errors?Introduction TroubleshootingPreset/local Confirm Meas/Setup Limits Limits On TTL Output TTL Output On, Fail O/P LowConnect Sensor to Channel A Any Sensor Errors? TroubleshootingStart Power Up meter POST Pass? Self Test Errors?Troubleshooting Agilent E4418B/E4419B Service GuideIntroduction Any Sensor Errors?Yes TroubleshootingStart Power Up meter POST Errors?Introduction Agilent E4418B/E4419B Service GuideTroubleshooting DualTroubleshooting Agilent E4418B/E4419B Service GuideIntroduction All/Other TroubleshootingIntroduction StartAppendix A Measurement Uncertainty Analysis Instrument Accuracy TestMeasurement Introduction Power MeterDefine the Measurand UncertaintiesDefine the Measurement Equation Uncertainty Equation u2MA = CTSE ⋅ uTSE 2 + CMV ⋅ u MVStandard Deviation of Power LevelStandard Uncertainty uxi Conversion to Linear UnitsWorst case error on 1V range Worst case error on 0.1V rangeVoltage Error Voltage ErrorPower mW Worst case error on 15.8V maximum power settingVoltage Error DistributionSensitivity Coefficients Ci Combined Standard Uncertainty ucy Expanded Uncertainty kucyMeasurement Uncertainty Analysis - Instrument Accuracy Test Agilent E4416A/E4417A Service GuideA-10 Measurement IntroductionAppendix B Measurement Uncertainty Analysis - Power Reference Level TestMeasurement Uncertainty Analysis - Power Reference Level Test Define the Measurement Equation Measurement IntroductionDefine the Measurand Pmeas =Figure B-1 Measurement Setup Pmeas = fVcomp,V1,V0,R,CF,MsMsUncertainty = 1 ⁄ 1±2PsPd Uncertainty EquationVoltage Measurements Uncertainty 1 j = ∑i +Voltage measurement Mismatch= ±49.25uV UncertaintyVSWR + VSWR1.05 + Sensor Calibration Factor Drift Calibration factoru Ms = ---------------------------------------------------- = 10ppm of reading + 0.5ppm of range ResistanceRepeatability 200 ⋅ 10 + 5 + 3 1000 ⋅ 0.5 +Measurement ADJUST REFTable B-1 Measurement Repeatability Results REF. LEVEL TESTI mW Power Measured = fVcomp, V1, V0, R, CF, Ms Sensitivity Coefficients CiUsing the above values gives 1.224 ⋅Expanded Uncertainty Combined Standard Uncertainty ucyIndex Page Page Agilent E4418B/E4419B Service Guide Index-4