Quantum Instruments Cascade Laser Starter Kit Manuel d'utilisateur télécharger pdf (Page 49)

Starter Kit Instruction Manual Maintenance 48

Temperature Reference oﬀset adjustment

[10] Adjust B13 (3) to 0.000 with P3 (4)

[11] Set the temperature with the Set Tem-

perature potentiometer (Fig.40 (7)) to +5

◦

,→ The temperature reference signal B13 should

be ≥4.3V

[12] Set the temperature with the Set Tem-

perature potentiometer (Fig.40 (7)) to -5

◦

,→ The temperature reference signal B3 should

be ≤4.3V

[13] Check the switch range by setting the

Temperature Reference at + 2

◦

C and -2

◦

B7 = -5V and +5V

B6 = +5V and -5V

[14] Check the output voltage of the transis-

tors

,→ The signals on R78 and R81 should tog-

gle simultaneously with the inversal signa ls on

R79 and R80

CAUTION ! The signals B6 and B7 (2)

must never be at 0V simultaneously. Other-

wise there is a risk of short-circuit!

Fig.41: TCU 151 main board

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Quantum Instruments Cascade Laser Starter Kit Manuel d'utilisateur Page 49