Product Description; Chapter 1 1.1 Product Description - Lakeshore 335 User Manual

Chapter 1: Introduction
1.1 Product
Description
FIGURE 1-1 Model 335 front view
Features:
Operates down to 300 mK with appropriate NTC RTD sensors
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Two sensor inputs
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Two configurable PID control loops providing 50 W and 25 W or 75 W and 1 W
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Autotuning automatically calculates PID parameters
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Automatically switch sensor inputs using zones to allow continuous measure-
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ment and control from 300 mK to 1505 K
Custom display setup allows you to label each sensor input
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USB and IEEE-488 interfaces
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Supports diode, RTD, and thermocouple temperature sensors
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Sensor excitation current reversal eliminates thermal EMF errors for
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resistance sensors
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10 V analog voltage outputs, alarms, and relays
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Designed with the user and ease of use in mind, the Model 335 temperature control-
ler offers many user-configurable features and advanced functions that until now
have been reserved for more expensive, high-end temperature controllers. The
Model 335 is the first two-channel temperature controller available with user
configurable heater outputs delivering a total of 75 W of low noise heater power:
50 W and 25 W, or 75 W and 1 W. With that much heater power packed into an afford-
able half-rack sized instrument, the Model 335 gives you more power and control
than ever.
Control outputs are equipped with both hardware and software features allowing
you, and not your temperature controller, to easily control your experiments. Output
one functions as a current output while output two can be configured in either cur-
rent or voltage mode. With output two in voltage mode, it functions as a ±10 V analog
output while still providing 1 W of heater power and full closed loop proportional-
integral-derivative (PID) control capability. Alarms and relays are included to help
automate secondary control functions. The improved autotuning feature of the
Model 335 can be used to automatically calculate PID control parameters, so you
spend less time tuning your controller and more time conducting experiments.

1.1 Product Description

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