Lake Shore Model 331 Temperature Controller User’s Manual
112-334.bmp
Figure 7-1. Model 331 Sensor and Heater Cable Assembly
10' - P/N 112-334, 20' - P/N 112-334
7.4 MODEL 3003 HEATER OUTPUT CONDITIONER
The Lake Shore Model 3003 Heater Output Conditioner is a passive filter which reduces the already
low noise present in the heater output of the Model 331. The Model 3003 connects between the heater
output terminals on the rear panel of a controller and a resistive heater. See Figure 7-2.
Specifications are as follows:
Max Current: 2 A
Max Voltage: 60 V
Attenuation: 50 or 60 Hz (line frequency): 20 dB
100 Hz and above (line frequency harmonics): 40 dB
Enclosure Size: 144 mm wide × 72 mm long × 165 mm deep (5.7 × 2.8 × 6.5 inches)
Weight: 1.6 kilograms (3.5 pounds)
The Model 3003 is a passive filter and requires no external power supply. The High and Low terminals
on the controller must be connected to the
High and Low terminals marked From Controller on the
Model 3003. The binding posts or a dual banana plug can be used to connect to the model 3003.
Precautions must be taken to ensure the High and Low terminals are not reversed. A diode in the
Model 3003 shorts the heater output if the polarity of the terminals is reversed.
The High and Low terminals marked To Heater on the Model 3003 should be attached to a resistive
heater used for temperature control. The binding posts or a dual banana plug can be used to connect to
the Model 3003. The ground terminals on the Model 3003 continue the shield if the heater cable is
shielded.
HI
FROM CONTROLLER
LO
CAUTION:
THIS HI TERMINAL
MUST BE
CONNECTED TO
HI TERMINAL OF
THE CONTROLLER
HI
TO HEATER
LO
3003 Heater Output Conditioner
F-331-7-2.eps
Figure 7-2. Model 3003 Heater Output Conditioner
7-4 Options and Accessories
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