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Lightwave Communications LDT-5525 manual C1n = U + V * C1 and C2n = V * C2

Models: LDT-5525

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C H A P T E R C

V= (Ta1 - Ta2) / (Td1 - Td2), and U = Ta1 - (Td1 * V) Then C1n and C2n can be determined by the following:

C1n = U + (V * C1) and C2n = V * C2

6Replace C1 with C1n by selecting the C1 parameter and entering the new C1n value. Replace C2 with C2n by selecting the C2 parameter and entering the new C2n value.

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LDT-5525

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Lightwave Communications LDT-5525 manual C1n = U + V * C1 and C2n = V * C2

Contents

Temperature Controller LDT-5525 User’s Guide700199040701 Page Chapter 1 Introduction and Specifications TABLE OF CONTENTSChapter 2 Operation Appendix A Steinhart-Hart Equation Chapter 3 Maintenance and TroubleshootingAppendix B Sensing Current and Thermistor Selection Two Point Calibration Method Appendix C AD590 and LM335 Sensor CalibrationTABLE OF CONTENTS AD590 Sensor LM335 Sensor One Point Calibration Methodiv LDT-5525 TABLE OF CONTENTSLIST OF FIGURES LIST OF FIGURESvi LDT-5525 LIST OF FIGURESSafety Information and the Manual SAFETY AND WARRANTY INFORMATIONGeneral Safety Considerations Safety Marking Symbols SAFETY SYMBOLSLimitations WARRANTYReturning an Instrument WA R R A N T Y Claims for Shipping Damagex LDT-5525 Comments, Suggestions, and Problems WA R R A N T Y We look forward to serving you even better in the futurexii LDT-5525 Product Overview INTRODUCTION AND SPECIFICATIONSC H A P T E R INTR ODUCTION AND SP ECIFI CATIONS Available Options and AccessoriesOutput1 SpecificationsTemperature Control Measurement Display User CalibrationGeneral C H A P T E R SpecificationsINTR ODUCTION AND SP ECIFI CATIONS 6 LDT-5525C H A P T E R AC Power ConsiderationsOPERATION Rack MountingIntroduction to the LDT-5525 Front Panel Power-Up SequenceFigure 2.1 LDT-5525 Front Panel Display AdjustmentsParameters SENSOR CAL Parameter SetupOutput Error IndicatorsControl Mode Back Panel Controls and Connections SENSOR SELECT SwitchAnalog Output Table 2.1 SENSOR SELECT Switch Positions TEC Connector14 LDT-5525 TEC Grounding ConsiderationsO P E R A T I O N Back Panel Controls and ConnectionsWarm-Up and Environmental Considerations General Operating ProceduresTemperature Mode Operation Resistance Mode Operation External Safety Switch OperationBooster Operation C H A P T E R General Operating ProceduresO P E R A T I O N 18 LDT-5525Calibration Overview MAINTENANCE AND TROUBLESHOOTINGC H A P T E R SPECIFICATION Recommended EquipmentEnvironmental Conditions Warm UpThermistor Calibration Calibration AdjustmentsAD590 Sensor Calibration LM335 Sensor Calibration ITE Current Calibration Symptom TroubleshootingCauses and Corrective Actions Unable to adjust output or A P P E N D I X A STEINHART-HART EQUATION1/T = A + B * ln R Equation Computer Program 30 LDT-5525 LDT-5525 C H A P T E R A 32 LDT-5525Thermistor Range SENSING CURRENT AND THERMISTOR SELECTIONA P P E N D I X B SENSING CURRENT Table B.2 10K Thermistor Temperature RangeTEMPERATURE RANGE Table B.3 10K Thermistor Voltage vs. Resolution Temperature ResolutionSelecting and Using Thermistors Selecting the Sensing Currentgenerally 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 AD590 Sensor AD590 AND LM335 SENSOR CALIBRATIONA P P E N D I X C LM335 Sensor Tn = v / 10mV / K - 273.15 - where Tn is in oC Two Point Calibration Method One Point Calibration Method40 LDT-5525 LDT-5525 C1n = U + V * C1 and C2n = V * C2C H A P T E R C 42 LDT-5525