Humidity | Quantum Instruments Cascade Laser Starter Kit specification

Starter Kit Instruction Manual	Maintenance		41
[5] Place the screws (3) in the PET holder (4).
[6] Place the PET holder (4) on the two guides
(5) on the back of the laser receptacle (6)		1
being careful of maintaining the PET holder
higher on the laser side than on the back side.
[7] Once the holder (4) is engaged in the guides,
push it down until contact with the gilded ce-
ramic pads of the laser is established.
[8] Screw the PET holder (4) to the receptacle		2
(6).
[9] Verify that the contact is established by		3
measuring with an ohm meter on the LLH100
low impedance plug.		4
Note: For reproducible measurement be care-
ful of measuring with the positive probe on the
+ LLH100 connection.		5
Note: If the contact is bad, adjust the plas-
tic screws (7) at the pressing end of the PET		6
holder (4).
[10] Place a dry desiccant bag close to the
low impedance line plug. Only applicable if
desiccation is needed and the lasers has been
shipped with a desiccant bag.
Note: This operation is preferably performed		Fig.30: Placing the PET U-shaped holder
in a gloves box under dry nitrogen atmosphere		Fig.30: Placing the PET U-shaped holder
in a gloves box under dry nitrogen atmosphere
if the ambient atmosphere is humid (this is
not necessary under normal conditions 50-60%
humidity).

[11] Close the cover (2) with the screws (1).

Image 42

Quantum Instruments Cascade Laser Starter Kit manual If the ambient atmosphere is humid this is, Humidity

Contents

Quantum Cascade Laser Starter Kit Instructions Manual Web version Contents Maintenance Overview InstallationTroubleshooting Use Appendix Limited waranty IdentiﬁcationDocument Manufacturer Generalities GeneralChapter overview Compliance Product GlossaryPersons Personnel Typographic conventions Commands styleProcedure style Description style See page x-y Troubleshooting style ProblemProcedure eﬀects style Possible causePage Non-compliance with the safety regulations Safety InstructionsImportance of safety instructions Introduction General safety instructions Environmental conditionsCompliance and informa- tion Description System Composition Description DFB and FP Quantum Cascade LasersIf no conﬁguration is speciﬁed, the DN pad is used Geometry of QC lasers Speciﬁcations Electrical model characteristics Electrical model Laboratory Laser HousingLLH100 LLH100 external view description Laboratory Laser Housing internal view LLH100 internal view Speciﬁcations of the Peltier connector Thermo-Electric Cooler TEC and PT100 connections Speciﬁcations of the measurement connector Measurement connection QCL pulser switching unitLDD100 QCL pulser switching unit front and rear view Measured voltages QCL pulse switching measuring unitGeneralities Timing data Laser peak current Duty cycle calculation Laser peak voltage Average dissipationAccuracy considerations Trigger and logic output signals Ω TTL driver circuit QCL pulser timing unit TPG128 QCL temperature controllerTCU151 Peltier and PT100 connections General InstallationChapter overview Packing list Standard items Setting the appropriate AC voltage on TCU151 Procedure110-120V, 60Hz USA 220-240V, 50Hz Europe Installing the starter Kit Before beginning Connecting Starter Kit Use QCL pulse timing unit com- mand description TCU151 command description TCU151 temperature controler front panel Laser utilisation OverviewProceedings Starting the TPG128 Procedure Interlock utilisation Interlock utilisation DC power supply is not ﬂoating TroubleshootingPower supply reaches max cur- rent for a very low voltage Principle QCL laser is not used with the LLH and is grounded Laser draws current but gives no lightLaser does not draw current There is no contact with the laser Maintenance How to remove the covers of TCU151 and TPG128Overview Replacement procedures Quantum Cascade Laser replace Ment Facet on the case, it is extremely fragile + LLH100 connection QCL UP and DN position Exchange Exchanging the laser If the ambient atmosphere is humid this is Humidity Before beggining interlock set Ting TCU151 temperature con Troller interlock settingProcedure interlock setting Needed material 1 TPG128 calibration Calibaration proceduresProcedure calibration Generalities TPG128 main board TPG128 main board 2 TCU151 temperature controller calibration Procedure +5V/-5V power supply check Sensing level and range adjustement = 1.22 to Temperature Reference oﬀset adjustment Oscillator check Current/Voltage ratio adjustmentSetting LCD screen should display 1.00 a 7V = 70 C If needed, adjust it with the trimmer P92 Starting the power section of the instru Ment Current adjustment → Value displayed ≤ 1A→ Value displayed should tend to the deﬁned value Threshold on Miscellaneous functions testing Temperature Limit testing→ The temperature displayed 2 should be 035 C → The red LED 1 should turn oﬀ Direct absorption Application notesDetection techniques Frequency modulation technique Tildas Photoacoustic detection Photoacoustic technique Appendix Bias Circut Bias-TGeneral Utilisation What has to be kept in mind before use? Current and voltage ranges of the Bias-T cir- cuit Avoid reverse polarity on the input Unpacking NS laser from its transportation box Unpacking instructions for NS submounts