Lake Shore Model 346 temperature controller User’s Manual

Updated September 2, 2026

Manual version 2.3

Written for firmware version 2.3

Lake Shore Cryotronics, Inc.

575 McCorkle Blvd.

Westerville, Ohio

43082-8888 USA

sales@lakeshore.com

support@lakeshore.com

www.lakeshore.com

Fax: (614) 891-1392

Telephone: (614) 891-2243

• 1. Introduction
  • 1.1. Product Description
  • 1.2. Model 346 Key Specifications
  • 1.3. Safety Summary and Symbols
  • 1.4. Legal Disclaimers
• 2. Installation
  • 2.1. Inspection and Unpacking
  • 2.2. Front Panel
  • 2.3. Rear Panel Overview and Line Input
  • 2.4. Diode/Resistor Sensor Inputs
  • 2.5. Thermocouple Sensor Inputs (Model 3402)
  • 2.6. Heater Output setup
• 3. Operation
  • 3.1. General
  • 3.2. Display Overview
  • 3.3. Input Setup
  • 3.4. Output and Control Setup
  • 3.5. Locking and unlocking the front panel
• 4. Advanced Operation
  • 4.1. Curve Setup and Usage
  • 4.2. Zone Settings
  • 4.3. Heater Groups
  • 4.4. Monitor Out
  • 4.5. Control Stability
  • 4.6. Warm-up
  • 4.7. Alarms
  • 4.8. Relays
  • 4.9. System Settings
• 5. Remote Interface Operation
  • 5.1. Message Flow Control
  • 5.2. USB Interface
  • 5.3. Ethernet Interface
  • 5.4. GPIB Interface
  • 5.5. Model 346 Command Summary
• 6. Options and Accessories
  • 6.1. General
  • 6.2. Models
  • 6.3. Options
  • 6.4. Accessories
  • 6.5. Rack Mounting
  • 6.6. Input Option Card Installation
• 7. Service
  • 7.1. General
  • 7.2. USB Troubleshooting
  • 7.3. Calibration Information
  • 7.4. Rear Panel Connectors
  • 7.5. Error Messages
  • 7.6. Firmware Updates
  • 7.7. Electrostatic Discharge
  • 7.8. Summary of Internal Memory Devices
  • 7.9. Technical Inquiries