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Vescent SLICE-QT Manual

Four-channel temperature controller
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2022/07/21 23:14
SLICE-QTC Four-Channel Temperature
Controller
Model No. SLICE-QT and SLICE-QTC
Document Revision: 1
Document Last Updated on 2022/07/20 23:32
Please read
Limited Warranty
Links
Click here for the
SLICE-QTC Quick Start
Click here for the
SLICE-QTC
Click here for the
Ziegler-Nichols loop tuning
Click here for the
SLICE-QTC web
Click here for the
Github page for SLICE-QTC GUI
Click here for the
Github page for SLICE-QTC firmware revisions
Please check back for added functionality. Contact
corrections, or to request added functionality.
Description
The SLICE-QTC is a high-precision temperature controller (see
thermal plants with sub-millikelvin precision.
Fig. 1: The SLICE-QTC
Purchase Includes
SLICE-QTC Temperature Control Unit
AC power cord with appropriate wall plug for you location (if known)
Four single-ended 6-ft control cables
Final Test Documentation
Product Manuals - https://www.vescent.com/manuals/
1/30
and
General Warnings and Cautions
Guide.
API.
instructions.
page.
1)
SLICE-QTC Four-Channel Temperature Controller
prior to operating the SLICE-QTC.
sales [at] vescent [dot] com
figure
1). It will control up to four
for questions and

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  • Page 1 2022/07/21 23:14 1/30 SLICE-QTC Four-Channel Temperature Controller SLICE-QTC Four-Channel Temperature Controller Model No. SLICE-QT and SLICE-QTC Document Revision: 1 Document Last Updated on 2022/07/20 23:32 Please read Limited Warranty General Warnings and Cautions prior to operating the SLICE-QTC. Links Click here for the SLICE-QTC Quick Start Guide.

  • Page 2: Proper Usage

    Last update: 2022/07/20 23:32 slice:qt https://www.vescent.com/manuals/doku.php?id=slice:qt Absolute Maximum Ratings and Power Input Note: All modules designed to be operated in a laboratory environment. Parameter Rating Environmental Temperature >15°C and <30°C Environmental Humidity <60% Environmental Dew Points <15°C Maximum AC Line Input Current 2 A Tab.

  • Page 3: List Of Symbols

    Tab. 3: Specifications of SLICE-QTC Extendable Legs The SLICE-QTC has four extendable legs (figure 2). Extending the front legs allows easy viewing from above (figure 1) and extending the rear legs (figure 3) allows easy viewing from below. Product Manuals - https://www.vescent.com/manuals/...

  • Page 4: Front Panel

    Last update: 2022/07/20 23:32 slice:qt https://www.vescent.com/manuals/doku.php?id=slice:qt Fig. 3: Side view of SLICE-QTC configured for viewing from below Fig. 2: Underside of SLICE-QTC Front Panel An image of the front panel is shown in figure 4. The functions and connections are as follows:...

  • Page 5: Interface Connections

    010500) to your specific plant is given in table Connector Color Function Pin Number TEC/Heater+ Black TEC/Heater- White Thermistor+ Blue Thermistor- Metal Sleeve Ground Shield Tab. 4: Cable pinout Do not have servo loop engaged when connecting Servo Output to your plant. Product Manuals - https://www.vescent.com/manuals/...

  • Page 6: Screen Navigation

    You may purchase more cables separately from Vescent Photonics. We do not recommend making cables, but if you do so, make sure the metal sleeve is well connected to the connector ground to provide proper shielding to the signal cables.
  • Page 7 It is still possible to engage the temperature control loops when system is locked, but it is not possible to change the set point temperature or loop parameters, etc. I/O Button Fig. 10: I/O button Enters the screen for programming the front-panel I/O. System Settings Button Product Manuals - https://www.vescent.com/manuals/...

  • Page 8: Entering Values

    Last update: 2022/07/20 23:32 slice:qt https://www.vescent.com/manuals/doku.php?id=slice:qt Fig. 11: System settings button Enters screen for system control settings (brightness, volume, etc.). Entering Values In order to afford maximum resolution, the least significant digit will not necessarily change to precisely your target value and will be coerced to the nearest acceptable value, which is limited by the digitization scheme for the set point.

  • Page 9: Home Screen

    To set the temperature set point from the home screen, touch the Setpoint window for the desired channel (circled in red for CH 1 in figure 17). A long touch will cause a keypad to appear. Enter Product Manuals - https://www.vescent.com/manuals/...
  • Page 10 Last update: 2022/07/20 23:32 slice:qt https://www.vescent.com/manuals/doku.php?id=slice:qt desired value and touch the accept button. A short touch will highlight the Setpoint window in yellow (figure 18). Use rotary knobs to select digit to edit (left knob) and value for digit (right knob).
  • Page 11 Fig. 19: Menu to adjust y-axis on temperature plot To adjust the time base (∆t) of the graph, either touch the button and select an option from the pop-up menu (figure 20), or turn the left rotary knob. Product Manuals - https://www.vescent.com/manuals/...
  • Page 12 Last update: 2022/07/20 23:32 slice:qt https://www.vescent.com/manuals/doku.php?id=slice:qt Fig. 20: Menu to adjust x-axis on temperature plot Display of Transducer Current, Voltage, and Power As shown in figure 21, the current being delivered to the transducer is displayed in the blue box on the right margin labeled Current [A].

  • Page 13: Channel Settings

    We recommend the Ziegler-Nichols method. Instructions on using this method can be found here. There is also an option to enable or disable each parameter in the loop filter. Product Manuals - https://www.vescent.com/manuals/...
  • Page 14 Last update: 2022/07/20 23:32 slice:qt https://www.vescent.com/manuals/doku.php?id=slice:qt Slew Rate Limit For applications where the rate of change of the temperature of the plant needs to be controlled, it is possible to set an upper limit on the slew rate. This can also be done through the PID Params screen.
  • Page 15 The User can limit the control power available to individual channels. To adjust control capacity from the Home screen, select CH X > Settings > Load Limits and the screen shown in figure 25 will appear. Product Manuals - https://www.vescent.com/manuals/...
  • Page 16 Last update: 2022/07/20 23:32 slice:qt https://www.vescent.com/manuals/doku.php?id=slice:qt Fig. 25: Screen for adjustment of control power capacity Transducer and Thermistor To set the properties of the transducer (TEC or heater) and thermistor for an individual channel from the Home screen, touch CH X > Settings > Plant. The menu in figure 26...

  • Page 17: Front-Panel Inputs & Outputs

    A input, you will be presented with the screen shown in figure 28. You can select the input to be any of the signals shown in table 7 for any of the four temperature-control channels. Product Manuals - https://www.vescent.com/manuals/...
  • Page 18 Last update: 2022/07/20 23:32 slice:qt https://www.vescent.com/manuals/doku.php?id=slice:qt Fig. 28: Programming the input on Channel A Input Each selected function for inputs and outputs will have settings that you can adjust, specific to the chosen functionality. To access these settings, select the Settings (“gear”) icon that is just to the right of the selection window.
  • Page 19 When the slow servo is enabled for a channel, the temperature setpoint field for that channel on the home screen will be highlighted blue, as shown in (figure 30). Product Manuals - https://www.vescent.com/manuals/...
  • Page 20 Last update: 2022/07/20 23:32 slice:qt https://www.vescent.com/manuals/doku.php?id=slice:qt Fig. 30: Slow Servo enabled on channel 1 The setpoint temperature of the slow servo channel can still be adjusted, by touching the Setpoint [°C] field. To adjust the slow servo settings, press and hold on the blue Setpoint [°C] Field. This will bring up the slow servo menu as shown in (figure...
  • Page 21 34. The numeral 1 in the magenta circle in the upper right-hand corner of the Actual [°C] display field indicates that the temperature for CH 4 is being delivered to the front-panel I/O port ch 1. Product Manuals - https://www.vescent.com/manuals/...
  • Page 22 Last update: 2022/07/20 23:32 slice:qt https://www.vescent.com/manuals/doku.php?id=slice:qt Fig. 34: CH 4 ∆T data is being delivered to front-panel I/O channel 1 Choice Comment Off No data delivered to output channel Actual temperature measured by Temperature thermistor Temperature error ∆T = T...
  • Page 23 It can be run from the single channel screen by pressing on the “Servo” button and choosing “Auto Tune”, then pressing “Start” from the “Next” drop down menu. Fig. 36: Auto tune menu showing a tune ready to start Product Manuals - https://www.vescent.com/manuals/...
  • Page 24 Last update: 2022/07/20 23:32 slice:qt https://www.vescent.com/manuals/doku.php?id=slice:qt Note that there is also an “Auto Tune” option under the “Settings” menu. However, this will display the results of the most recent completed auto tune and cannot be used to start an auto tune. Once the auto tune starts, it will progress through several stages, and the user will be updated on its progress through a loading bar.

  • Page 25: System Settings

    From this screen, adjustments to the brightness of the screen and the volume of the audio feedback can be made. Input Impedance Change the input impedance of the two front-panel input ports. Select either 50 Ω or 1 MΩ. Product Manuals - https://www.vescent.com/manuals/...
  • Page 26 2.22 2.51 Tab. 9: Most recent firmware versions as of July 2022 From time to time, Vescent will upgrade the firmware for controlling the SLICE-QTC. The procedure to upgrade the firmware is given here. Host GUI If accessed through a PC Host GUI, the Settings screen (figure...
  • Page 27 first download the latest version, connect the PC to the SLICE-QTC, and assign a COM port to the SLICE-QTC. The following describes the steps involved. Download and store the latest GUI executable from the Vescent FTP site (or request copy of executable GUI from sales [at] vescent [dot] com).

  • Page 28: Firmware Update

    PC. After assigning the COM port, the system will recognize the device in the future (unless you reassign the COM port to another device). Firmware Update From time to time, Vescent will upgrade the firmware for controlling the SLICE-QTC. The procedure to upgrade the firmware is given here and a video tutorial can be found here.

  • Page 29: Maintenance

    Maintenance There are no user-serviceable parts inside this instrument. Refer all repairs to the manufacturer. Work performed by persons not authorized by Vescent Photonics may void the warranty. More cables may be purchased separately; order p/n 50-00005 Located in power receptacle on rear panel Subject to change without notice Nominal value 10 kΩ...
  • Page 30 Last update: 2022/07/20 23:32 slice:qt https://www.vescent.com/manuals/doku.php?id=slice:qt From: https://www.vescent.com/manuals/ - Product Manuals Permanent link: https://www.vescent.com/manuals/doku.php?id=slice:qt Last update: 2022/07/20 23:32 https://www.vescent.com/manuals/ Printed on 2022/07/21 23:14...

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