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Lightwave Communications LDT-5525 O P E R A T I O N, General Operating Procedures, C H A P T E R

Models: LDT-5525

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18LDT-5525

C H A P T E R 2

O P E R A T I O N

General Operating Procedures

18LDT-5525

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Lightwave Communications LDT-5525 manual O P E R A T I O N, General Operating Procedures, C H A P T E R

Contents

700199040701 User’s GuideTemperature Controller LDT-5525 Page Chapter 2 Operation TABLE OF CONTENTSChapter 1 Introduction and Specifications Appendix B Sensing Current and Thermistor Selection Chapter 3 Maintenance and TroubleshootingAppendix A Steinhart-Hart Equation Appendix C AD590 and LM335 Sensor Calibration TABLE OF CONTENTSAD590 Sensor LM335 Sensor One Point Calibration Method Two Point Calibration MethodTABLE OF CONTENTS iv LDT-5525LIST OF FIGURES LIST OF FIGURESLIST OF FIGURES vi LDT-5525General Safety Considerations SAFETY AND WARRANTY INFORMATIONSafety Information and the Manual SAFETY SYMBOLS Safety Marking SymbolsReturning an Instrument WARRANTYLimitations x LDT-5525 Claims for Shipping DamageWA R R A N T Y Comments, Suggestions, and Problems xii LDT-5525 We look forward to serving you even better in the futureWA R R A N T Y C H A P T E R INTRODUCTION AND SPECIFICATIONSProduct Overview Available Options and Accessories INTR ODUCTION AND SP ECIFI CATIONSTemperature Control SpecificationsOutput1 User Calibration Measurement DisplayGeneral Specifications INTR ODUCTION AND SP ECIFI CATIONS6 LDT-5525 C H A P T E RAC Power Considerations OPERATIONRack Mounting C H A P T E RFigure 2.1 LDT-5525 Front Panel Power-Up SequenceIntroduction to the LDT-5525 Front Panel Parameters AdjustmentsDisplay Parameter Setup SENSOR CALControl Mode Error IndicatorsOutput Analog Output SENSOR SELECT SwitchBack Panel Controls and Connections TEC Connector Table 2.1 SENSOR SELECT Switch PositionsTEC Grounding Considerations O P E R A T I O NBack Panel Controls and Connections 14 LDT-5525Temperature Mode Operation General Operating ProceduresWarm-Up and Environmental Considerations External Safety Switch Operation Resistance Mode OperationBooster Operation General Operating Procedures O P E R A T I O N18 LDT-5525 C H A P T E RC H A P T E R MAINTENANCE AND TROUBLESHOOTINGCalibration Overview Recommended Equipment Environmental ConditionsWarm Up SPECIFICATIONCalibration Adjustments Thermistor CalibrationAD590 Sensor Calibration LM335 Sensor Calibration ITE Current Calibration Causes and Corrective Actions TroubleshootingSymptom Unable to adjust output or STEINHART-HART EQUATION A P P E N D I X A1/T = A + B * ln R Equation Computer Program 30 LDT-5525 LDT-5525 32 LDT-5525 C H A P T E R AA P P E N D I X B SENSING CURRENT AND THERMISTOR SELECTIONThermistor Range TEMPERATURE RANGE Table B.2 10K Thermistor Temperature RangeSENSING CURRENT Temperature Resolution Selecting and Using ThermistorsSelecting the Sensing Current Table B.3 10K Thermistor Voltage vs. Resolutiongenerally a good choice for most laser diode applications where high stability is required near room temperatures. Similarly, 10 K thermistors are often a good choice for detector cooling applications where you want to operate at temperatures from -30 oC to room temperature A P P E N D I X C AD590 AND LM335 SENSOR CALIBRATIONAD590 Sensor LM335 Sensor Tn = v / 10mV / K - 273.15 - where Tn is in oC 40 LDT-5525 One Point Calibration MethodTwo Point Calibration Method C1n = U + V * C1 and C2n = V * C2 LDT-552542 LDT-5525 C H A P T E R C