What does it mean when Autotune indicates ‘Abort’ or ‘Fail’ on Cryo-con Temperature Controller?
If Autotune indicates a status of 'Abort' on your Cryo-con Temperature Controller, it means the control loops are not engaged or there is an invalid temperature reading on the control input channel. If it shows 'Fail', it means Autotune cannot generate a solution because of issues in the system dynamics.
Why does Cryo-con Temperature Controller periodically reset?
If your Cryo-con Temperature Controller periodically resets, or resets when the Control key is pressed, this is generally caused by low AC line voltage. Check the AC voltage and ensure it matches the instrument’s voltage selection.
What does Readback displayed mean on Cryo-con Temperature Controller?
If 'Readback' is displayed on the Cryo-con Temperature Controller, it means the control loops were disengaged by the heater current read-back monitor. The most likely cause is an open heater.
How to reduce noise on temperature measurements with Cryo-con Temperature Controller?
Noise on temperature measurements could be due to excessive noise pickup, especially AC power line noise. Check your wiring and shielding to minimize this interference.
What to do if Cryo-con Temperature Controller shows complete failure?
If your Cryo-con Temperature Controller experiences complete failure, a possible cause is a blown fuse. Before replacing the fuse, check the line voltage selection.
Why is my Cryo-con Temperature Controller showing unstable control?
If your Cryo-con Temperature Controller system is oscillating, it indicates unstable control. Try de-tuning the PID values by decreasing P, increasing I, and setting D to zero. You can also optimize the control loop parameters using the Autotune feature.
How to fix Overtemp displayed on Cryo-con Temperature Controller?
If 'Overtemp' is displayed on your Cryo-con Temperature Controller, it means the control loops were disengaged due to excessive internal temperature. Check the heater resistance, ensuring it matches the actual heater resistance. Also, verify that the AC power line voltage matches the actual voltage. Make sure the instrument’s fan is running and that there's adequate airflow around the sides and rear panel.
Details the four identical input channels supporting various cryogenic sensors and their measurement principles.
Describes the four independent control loop outputs, including heater and analog voltage outputs.
Explains the Model 24C's TFT LCD display, keypad, and menu-driven interface for instrument control.
Covers standard remote interfaces like Ethernet and RS-232 for instrument communication and control.
Lists all components included with the Model 24C controller for initial setup.
Instructions on checking and setting the correct AC power line voltage for the instrument.
Steps for connecting power and initiating the controller's self-test procedure.
Ensures proper installation and ventilation for benchtop or rack-mounted use.
Details on using optional kits for mounting the controller in a standard 19-inch rack.
Explains how to identify the Model 24C's model number on the instrument and displays.
Details standard configurations and optional modules available for the Model 24C.
Provides contact information for Cryo-con technical support and firmware updates.
Outlines the procedure for returning the instrument for repair or recalibration.
Lists available accessories for the Model 24C, such as rack mount kits and cables.
Details compatible cryogenic sensors, heaters, and wires for use with the controller.
Provides a high-level overview of the instrument's UI, input channels, and supported sensors.
Details performance metrics for diode and PTC resistor sensors, including accuracy and resolution.
Describes the instrument's measurement resolution and factors affecting control stability.
Details the specifications for the four control loop outputs, including heater and analog outputs.
Covers relay output capabilities and standard remote interface options like Ethernet and RS-232.
Explains the function keys, keypad layout, and data entry methods on the front panel.
Describes Home Status, Temperature, and Loop Status displays, and their configurations.
Guides users through accessing and navigating instrument setup menus from the front panel.
Step-by-step guide for selecting and configuring sensor types for input channels.
Explains how to load custom sensor calibration curves into the instrument.
Details the autotuning process for optimizing PID control loop parameters.
Describes how to perform temperature ramps using specified rates and setpoints.
Explains the CalGen feature for generating custom sensor calibration curves.
Guide for installing and setting up thermocouple sensors with the optional module.
Information on obtaining low-cost recalibration services from Cryo-con.
Guidance on determining appropriate intervals for instrument recalibration.
Covers Ethernet, IEEE-488 (GPIB), and RS-232 interface setup and parameters.
Steps for configuring IP address, subnet mask, and gateway for LAN communication.
Introduction to the SCPI language used for instrument control and programming.
Explains the hierarchical structure, command format, and syntax rules of SCPI.
Lists frequently used SCPI commands for instrument identification and control.
Details status registers (ISR, ESR, STB) for monitoring instrument conditions.
Provides a hierarchical listing of all available remote commands for programming.
Lists factory-installed sensors with their index, name, and description.
Details how to install custom sensors and their default names and indices.
Lists sensor curve files (.crv) provided on the software CD.
Describes the structure and format required for custom sensor calibration files.
Explains the process and requirements for updating the instrument's firmware.
Guides on establishing a network connection between PC and instrument for firmware updates.
Steps for loading, programming, and verifying the new firmware using the utility.
Lists common error messages and their conditions, like out-of-range measurements.
Diagnoses issues related to control loops, heaters, and their status indicators.
Addresses problems like noise and offset errors affecting temperature readings.
Troubleshoots issues with RS-232, IEEE-488, and LAN interface communication.
Covers common issues like controller resets and complete instrument failures.
Overview of methods for obtaining PID coefficients for accurate control.
Detailed methods for manually tuning PID loops, including Ziegler-Nichols.
Discusses tuning modes (P, PI, PID) and their relation to system noise.
Steps for configuring and executing the automatic PID tuning process.
Provides temperature vs. voltage data for various silicon diode sensors.
Presents temperature vs. resistance data for Ruthenium-Oxide sensors.
Provides temperature vs. resistance data for CLTS sensors.
Includes temperature vs. resistance data for various Cernox™ sensors.
Details the pin assignments for sensor input connectors (DIN-6).
Diagrams and pin assignments for Loop #1 (banana plug) and Loop #2/Relays (terminal block).
Explains the physical connections for Ethernet, GPIB, and RS-232 interfaces.
General| Temperature Stability | ±0.001 K |
|---|---|
| Number of Sensor Inputs | 4 |
| Number of Control Outputs | 2 |
| Control Algorithm | PID |
| Computer Interface | RS-232, IEEE-488 (GPIB) |
| Display | LCD |
| Power Requirements | 100-240 VAC, 50/60 Hz |
| Sensor Types | Thermocouple |
| Cooling Power | Not applicable |
| Control Interface | Computer |
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