Quantum Instruments Cascade Laser Starter Kit manual Temperature Reference offset adjustment

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 ◦C

,→ The temperature reference signal B13 should be ≥4.3V

[12]Set the temperature with the Set Tem- perature potentiometer (Fig.40 (7)) to -5 ◦C

,→ The temperature reference signal B3 should be ≤4.3V

[13]Check the switch range by setting the Temperature Reference at + 2 ◦C and -2 ◦C

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 signals 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!

1

3

2

4

Fig.41: TCU151 main board