Quantum Instruments Cascade Laser Starter Kit - Manual (Page 50)

Starter Kit Instruction Manual Maintenance 49
Oscillator check
[15] Measure the frequency on the pin 7 of
U13 (1).
Note: The value is 28KHz + /- 3KHz
Current/Voltage ratio adjustment
[16] Adjust the trimmer P4 (6) in order to
read B4 = 0.6V (4).
[17] Set the selector (5) to mode Setting +I.
The LCD screen should display 1.00 A.
Note: If it is not the case, adjust it with P2
(2).
[18] Adjust the trimmer P4 in order to read
B4 = 3.0 V.
The LCD screen should display 5.00 A.
Note: If it is not the case, adjust it with P2
(2). Example : 0,6 V ⇒ 0,99 A and 3V ⇒
4,99 A.
[19] Set the switch on the front panel to mode
Setting -I.
[20] Repeat steps [2] and [4] for P5 (7) and
B5 (3).
1
Fig.42: TCU151 main board
2
3
4
Fig.43: TCU151 main board
TCU151
Tem
pera
ture
Con
trolle
r
Alar
m
Res
et
Exte
rnal
Inte
rnal
Rea
l I
Rea
l C Setti
ng
C
Setti
ng
+I
Setti
ng
−I
+
−
5
7
6
Fig.44: TC51 front panel