IMPORTANT
Install a 12 amp in-line fuse between the power supply output and the electrical
feedthrough. This will prevent damage to the heater due to a broken thermocouple, a
malfunctioning temperature controller, or a power surge.
Use a DC or AC power supply (e.g., AC “Variac”, 0-120V) or a temperature controller
(e.g., Eurotherm Models 808 controller and 425 SCR). The output of your power source
should not exceed:
45V DC or AC
rms
(typ.) for the 2″ heater, or
85V DC or AC
rms
(typ.) for the 3″ heater
Refer to the heater tag for the correct maximum voltage for your heater. DO NOT USE
120V LINE VOLTAGE. If a temperature controller is used, it may be necessary to use
a transformer to reduce the output voltage. Some controllers have a voltage limiter that
can be adjusted by the user.
A
A
A
L
L
L
W
W
W
A
A
A
Y
Y
Y
S
S
S
M
M
M
E
E
E
A
A
A
S
S
S
U
U
U
R
R
R
E
E
E
T
T
T
H
H
H
E
E
E
V
V
V
O
O
O
L
L
L
T
T
T
A
A
A
G
G
G
E
E
E
A
A
A
C
C
C
R
R
R
O
O
O
S
S
S
S
S
S
T
T
T
H
H
H
E
E
E
H
H
H
E
E
E
A
A
A
T
T
T
E
E
E
R
R
R
W
W
W
H
H
H
I
I
I
L
L
L
E
E
E
I
I
I
T
T
T
I
I
I
S
S
S
I
I
I
N
N
N
U
U
U
S
S
S
E
E
E
Back to Table of Contents
Issued September 11, 2008 6
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