Quantum Instruments Cascade Laser Starter Kit Manuel d'utilisateur télécharger pdf (Page 51)

Starter Kit Instruction Manual Maintenance 50

CAUTION ! For the further steps of this

check, limit the positive current to 1 A and

the negative one with 1.2 A by means of the

5 turns potentiometer)

Temperature limit threshold

[21] Measure the voltage on pin 2 of U10

(1).

Note: The value should be: 0.7V (= 70

◦

(If needed, adjust it with the trimmer P9(2)).

[22] Power oﬀ the instrument.

Starting the power section of the instru-

ment.

[23] Remove the 100 E reference resistor from

J8 (4) and plug the output cable J8.

[24] Plug the external cable into the LLH100,

and verify that the Pt100 is proprely mounted

in the latter.

[25] Use an external power supply (0-30VDC/3 A)

to simulate the internal power supply.

[26] Limit the current to 200 mA and connect

it to main board J1 connector (3).

[27] Power on the instrument and the external

power supply.

Fig.45: TCU 151 main board

Fig.46: TCU 151 main board

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Quantum Instruments Cascade Laser Starter Kit Manuel d'utilisateur Page 51