Manuals / Lightwave Communications / Computer Equipment / Network Card

Lightwave Communications LDT-5525 manual Recommended Equipment, Environmental Conditions, Warm Up

Models: LDT-5525

1 56

Download 56 pages 22.8 Kb

Page 34

Recommended Equipment

C H A P T E R 3

MAINTENANC E AND TR OUBLESHOOTING

Calibration Overview

Recommended Equipment

Recommended test equipment for calibrating the LDT-5525 Temperature Controller is listed in Table 3.1. Equipment other than that shown in the table may be used if the specifications meet or exceed those listed.

Table 3.1

DESCRIPTION	MFG / MODEL	SPECIFICATION

DMM	HP 3457A	DC Amps (@ 1.0A): +0.02%
		Resistance (@ 10Ω): 0.02%
		0.1 ∝A or 0.1 mW resolution
Resistors	Metal Film	15 KΩ (for ITE calibration)
		4	KΩ and 40 KΩ (for 100 mA calibration)
		4	KΩ and 400 KΩ (for 10 mA calibration)
		4	KΩ and 10 KΩ (for LM335 calibration)
		10 KΩ and 20 KΩ (for AD590 calibration)
	High Power	1	Ω, 20W, low TCR (for ITE calibration)

Environmental Conditions

Calibrate this instrument under laboratory conditions. We recommend calibration at 23oC ± 1.0oC. When necessary, however, the LDT-5525 Temperature Controller may be calibrated at its intended use temperature if this is within the specified operating temperature range of 0 to 40oC.

Warm Up

The LDT-5525 Temperature Controller should be allowed to warm up for at least 1 hour before calibration.

20 LDT-5525

Image 34

Lightwave Communications LDT-5525 manual Recommended Equipment, Environmental Conditions, Warm Up, Description, Mfg / Model

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 AD590 Sensor LM335 Sensor One Point Calibration Method Appendix C AD590 and LM335 Sensor CalibrationTABLE OF CONTENTS Two Point Calibration MethodTABLE OF CONTENTS iv LDT-5525LIST OF FIGURES LIST OF FIGURESLIST OF FIGURES vi LDT-5525Safety Information and the Manual SAFETY AND WARRANTY INFORMATIONGeneral Safety Considerations SAFETY SYMBOLS Safety Marking 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 Available Options and Accessories INTR ODUCTION AND SP ECIFI CATIONSOutput1 SpecificationsTemperature Control User Calibration Measurement DisplayGeneral 6 LDT-5525 SpecificationsINTR ODUCTION AND SP ECIFI CATIONS C H A P T E RRack Mounting AC Power ConsiderationsOPERATION C H A P T E RIntroduction to the LDT-5525 Front Panel Power-Up SequenceFigure 2.1 LDT-5525 Front Panel Display AdjustmentsParameters Parameter Setup SENSOR CALOutput Error IndicatorsControl Mode Back Panel Controls and Connections SENSOR SELECT SwitchAnalog Output TEC Connector Table 2.1 SENSOR SELECT Switch PositionsBack Panel Controls and Connections TEC Grounding ConsiderationsO P E R A T I O N 14 LDT-5525Warm-Up and Environmental Considerations General Operating ProceduresTemperature Mode Operation External Safety Switch Operation Resistance Mode OperationBooster Operation 18 LDT-5525 General Operating ProceduresO P E R A T I O N C H A P T E RCalibration Overview MAINTENANCE AND TROUBLESHOOTINGC H A P T E R Warm Up Recommended EquipmentEnvironmental Conditions SPECIFICATIONCalibration Adjustments Thermistor CalibrationAD590 Sensor Calibration LM335 Sensor Calibration ITE Current Calibration Symptom TroubleshootingCauses and Corrective Actions 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 AThermistor Range SENSING CURRENT AND THERMISTOR SELECTIONA P P E N D I X B SENSING CURRENT Table B.2 10K Thermistor Temperature RangeTEMPERATURE RANGE Selecting the Sensing Current Temperature ResolutionSelecting and Using Thermistors 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 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 C1n = U + V * C1 and C2n = V * C2 LDT-552542 LDT-5525 C H A P T E R C