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Lightwave Communications manual Power-Up Sequence, Introduction to the LDT-5525 Front Panel

Models: LDT-5525

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Power-Up Sequence

C H A P T E R 2

O P E R A T I O N

Power-Up Sequence

Power-Up Sequence

With the LDT-5525 Series Precision Temperature Controller connected to an AC power source, pressing the POWER switch will supply power to the instrument and start the power up sequence.

During the power-up sequence, the following takes place. For about two seconds all indicators light up, and all of the 7-segment displays indicate "8". Then all lamps are turned off for two seconds. Then, the sensor switch position is displayed for two seconds. After this, the unit is configured to the state it was in when the power was last shut off (except for the display mode which defaults to I TE measurement). The adjust knob is always disabled at power up.

Introduction to the LDT-5525 Front Panel

The LDT-5525 Temperature Controller's front panel contains displays and controls for the Temperature Controller hardware. Each of the labeled areas on the front panel (i.e. DISPLAY or MODE) is described in this chapter.

Refer to Figure 2.1 for the following discussions of the LDT-5525 Temperature Controller front panel sections. The key words are in capital letters for quick identification.

Error	Parameter		Display	Adjust	Adjust
Indicators	Switch		Switch	Enable	Knob
			Switch
	LDT-5525	TEMPERATURE CONTROLLER

A

kΩ

C

DISPLAY ADJUST

ITE

SENSOR VIEW SET

PARAMETER

		ILIMIT	ENBL
SENSOR OPEN	TE OPEN	T LIMIT
		GAIN

	ANALOG OUT	SENSOR CAL	MODE	OUTPUT
	POWER	C1	I TE
	100 C/V
		C2	R	ON
	10 k Ω/ V
			T

100kΩ/ V

AC POWER	Analog	CAL	Mode	Output
ON/Off	Output	Select	Select	On/Off
Switch	Connector	Switch	Switch	Switch

Figure 2.1 LDT-5525 Front Panel

8 LDT-5525

Image 22

Lightwave Communications manual Power-Up Sequence, Introduction to the LDT-5525 Front Panel, 1 LDT-5525 Front Panel

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