Quantum Instruments Cascade Laser Starter Kit - Manual (Page 53)

Starter Kit Instruction Manual Maintenance 52
Miscellaneous functions testing Temperature
limit testing
[37] Decrease the temperature limit threshold
from 0.7 V to 0.3 V.
Note: For more details, see Temperature limit
threshold on page 50.
[38] Increase the temperature reference to 35
◦ C.
→ When the threshold is overpassed, the red
LED (1) in front panel should lit.
[39] Wait the real temperature drops 10 ◦ C
below the threshold.
[40] Reset the instrument with the RESET
button (2).
→ The red LED (1) should turn off.
[41] Reset the temperature limit threshold to
0.7 V.
Note: For more details, see Temperature limit
threshold on page 50.
Monitoring
[42] Check the output voltage on the rear in-
strument BNC connector (5).
Note: For 35 ◦ C, the voltage should be 350
mV.
External reference
[43] Plug an external power supply to the Ex-
ternal Reference BNC connector (6).
[44] Set the voltage to 3.5 V.
[45] Set the switch External/Internal (3)
to External.
[46] Set the selector (4) to mode Setting ◦ C.
→ The temperature displayed (2) should be
035 ◦ C.
[47] Set the selector (4) to mode Real ◦ C.
→ The temperature displayed (2) should fol-
low the reference temperature.
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
+
−
1
2
3
4
Fig.49: TCU151 front panel
0
1
US E O NLY WIT H 250 V
FU SE S / E MP LOY ER
UN IQU EM EN T A VEC
DE S F US IBLE S D E 2 50v
110 −12 0V
22 0−2 40 V
UTP
UT Max
: 15
V/6A
MO
NIT
OR
ING
10
mV
/ C
Zou
t: 20
0 oh
m
Exte
rna
l Re
f.
100
mV
/ C
Zin:
1 M
ohm
Inte
rloc
king
6
5
Fig.50:TCU151 rear panel