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General| Temperature Resolution | 0.001 K |
|---|---|
| Sensor Inputs | Up to 4 |
| Heater Outputs | 2 |
| Control Algorithm | PID |
| Input Channels | 4 |
| Output Channels | 2 |
| Control Output | PID |
| Input Type | Voltage |
| Heater Power | 50 W |
| Display | LCD |
| Communication Interfaces | RS-232 |
| Power Requirements | 100-240 VAC, 50/60 Hz |
| Dimensions | 89 mm |
| Weight | 4.5 kg |
Details on the Model 335's sensor input capabilities, compatible sensor types, and configuration.
Explains the temperature control features, PID loops, setpoint ramping, and zone tuning.
Describes the USB and IEEE-488 interfaces for computer control and data gathering.
Guides users on selecting appropriate temperature sensors based on range, sensitivity, and environment.
Provides detailed specifications for the Model 335's inputs, outputs, and general parameters.
Detailed specifications for sensor inputs, including range, excitation, and accuracy.
Explains how to configure sensor inputs, including type, isolation, and resolution.
Details the Model 335's control capabilities, including PID control and heater outputs.
Describes the specifications and configurations of the Model 335's heater outputs.
Covers the IEEE-488 and USB interface capabilities and settings.
Provides an overview of installation instructions and safety precautions for the Model 335.
Guides users on selecting appropriate temperature sensors based on range, sensitivity, and environment.
Explains calibration services, SoftCal™, and using standard curves for sensor data.
Details precision calibration services, accuracy, and the components of a calibrated sensor.
Describes SoftCal™ as a solution for improving individual sensor accuracy using known temperature points.
Introduces the Curve Handler software for loading and manipulating sensor curves.
Guidelines for proper sensor installation, including mounting materials and location.
Explains how to choose the optimal location for sensors for accuracy and control.
Information on selecting and installing resistive heaters for temperature control systems.
Details heater resistance and power ratings for Model 335 outputs and calculating maximum power.
Discusses factors affecting good temperature control, including thermal conductivity and lag.
Discusses thermal lag and its impact on controller performance and stability.
Introduces the PID control algorithm used by the Model 335 for closed-loop operation.
Explains the proportional term (gain) in the PID control equation and its operation.
Describes the integral term (reset) in the PID control equation and its contribution to error elimination.
Details the derivative term (rate) in the PID control equation and its role in system response.
Explains the manual output function, used for open-loop control or supplementing PID output.
Provides an overview of installation instructions and safety precautions for the Model 335.
Describes how to properly connect the Model 335 to line power, including voltage configurations.
Explains the importance of the line fuse and how to replace it with the correct type and rating.
Details how to connect diode and resistor sensors to the Model 335 inputs.
Defines the pins and connections for the 6-pin DIN sensor input sockets.
Explains how to ground and shield sensor leads to reduce noise and avoid ground loops.
Explains the purpose and technique of four-lead measurement to eliminate lead resistance errors.
Provides techniques to reduce measurement noise through proper instrument hardware setup.
Covers heater wiring from the vacuum shroud to the instrument for both heater outputs.
Details the variable DC current sources for heater outputs and their configurable ranges.
Details how to set up and configure sensor inputs for various sensor types.
Specific setup instructions for diode sensors, including input ranges and excitation current.
Details the thermal EMF compensation algorithm and current reversal feature.
Guides on selecting appropriate sensor curves for temperature conversion and control.
Explains the temperature limit feature to protect equipment from damage by shutting down outputs.
Instructions for configuring outputs and setting up control loops (closed or open loop).
Details the Model 335's heater outputs, their power capabilities, and configurations.
How to configure Output 2 as a current or voltage source for different applications.
How Max Current and Heater Resistance parameters work together to limit power and protect heaters.
Explains how to use the User Max Current setting for optimal current limiting with non-standard heaters.
Details the four output modes: Off, Closed Loop PID, Zone, and Open Loop.
Explains the most common mode for tightly controlling temperature using PID feedback.
Describes Zone Mode for automatic control parameter changes based on temperature zones.
Details control parameters like Control Input, P, I, D, Setpoint, and Heater Range.
How to assign a sensor input to create a control loop for temperature control.
Explains setting the Proportional (gain) parameter for PID control loops.
Describes setting the Integral (reset) parameter for PID control loops.
Explains setting the Derivative (rate) parameter for PID control loops.
Instructions for setting the desired load temperature (setpoint) for a control loop.
How to set up setpoint ramping for smooth temperature changes and overshoot minimization.
How to set the heater output range (Off, Low, Medium, High) for Outputs 1 and 2.
Overview of the Model 335's IEEE-488 and USB computer interfaces.
Details the USB interface, its virtual serial port emulation, and driver installation.
Details the Autotune feature for automatically tuning PID control parameters of cryogenic systems.
Explains how to set up custom temperature zones with pre-programmed PID values and parameters.
Setting up high and low alarms for sensor inputs and configuring relay outputs.
How to configure alarm setpoints, enable/disable alarms, and set audible/visible indicators.
Configuring relay assignments for alarm functions or manual control.
Describes operations for editing, erasing, copying, and creating SoftCal curves via the front panel.
Explains the SoftCal™ feature for inexpensive sensor calibration and accuracy improvement.
Details SoftCal™ calibration for silicon diode sensors and required data points.
Step-by-step procedure for creating a SoftCal™ calibration curve using the front panel.
Details the IEEE-488 interface, its standards compliance, and functions (Talker, Listener).
Explains the Model 335's status system, including registers and Service Request (SRQ).
Details the USB interface, its virtual serial port emulation, and configuration.
Step-by-step guide for installing the USB driver from Windows Update, web, or CD.
Procedures for manual driver installation in Device Manager for various Windows versions.
Lists and describes interface commands alphabetically with syntax and remarks.
Command to configure alarm parameters for sensor inputs (setpoints, latching, audible/visible).
Command to initiate the Autotune process for PID control loops.
Command to reset all configuration values to factory defaults.
Command to configure heater output settings like output, type, resistance, and max current.
Command to assign a curve number to a specific sensor input.
Command to set the sensor type, autorange, range, compensation, and units for an input.
Command to set the output mode (Off, Closed Loop PID, Zone, Monitor Out, Warmup Supply).
Command to set PID control loop values (Proportional, Integral, Derivative) for an output.
Query to retrieve the PID control loop values for an output.
Command to configure setpoint ramp parameters, including on/off and rate.
Command to set the heater output range (Off, Low, Medium, High) for Outputs 1 and 2.
Command to configure relay modes, input alarms, and alarm types for relay control.
Command to generate a SoftCal™ curve from standard data and user inputs.
Command to set the desired load temperature (setpoint) for a control loop.
Command to set a temperature limit to shut down outputs if exceeded.
Command to configure zone table parameters for advanced temperature control.
Troubleshooting steps for issues related to USB interface installations and operation.
Troubleshooting steps for new USB installations, checking drivers and settings.
Troubleshooting steps for USB issues with existing installations that stop working.
Troubleshooting common issues with IEEE-488 interface installations and operation.
Troubleshooting steps for new IEEE-488 installations, checking addresses and commands.
Troubleshooting steps for IEEE-488 issues with existing installations that stop working.
Step-by-step instructions for safely removing and replacing line fuses.
Accessing the Factory Reset menu to restore default parameters or clear curve memory.
A list and descriptions of error messages that may be displayed during operation.
Information on Electrostatic Discharge (ESD) and potential damage to electronic components.
Precautions for handling ESDS components to prevent damage during installation.
Instructions for updating the instrument's firmware from the Lake Shore website.
Key safety precautions for handling LHe and LN2, emphasizing ventilation and protection.
