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SLICE-QTC Four-Channel Temperature Controller

Product Manuals - https://www.vescent.com/manuals/

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

and

General Warnings and Cautions

prior to operating the SLICE-QTC.

Links

Click here for the

SLICE-QTC Quick Start Guide

Click here for the

SLICE-QTC API

Click here for the

Ziegler-Nichols loop tuning instructions

Click here for the

SLICE-QTC web page

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

sales [at] vescent [dot] com

for questions and

corrections, or to request added functionality.

Description

The SLICE-QTC is a high-precision temperature controller (see

ﬁgure 1

). It will control up to four

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

Содержание SLICE-QT

Страница 1: ...loop tuning instructions Click here for the SLICE QTC web page 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 sales at vescent dot com for questions and corrections or to request added functionality Description The SLICE QTC is a high precision temperature controller see ﬁgure 1 It wi...

Страница 2: ...ole system controller transducer plant and sensor Tips for Successful Temperature Regulation The transducer plant and sensor must all be in good thermal contact Use thermal paste or 1 epoxy to avoid air gaps between a TEC or heater and the body of the plant as well as to secure the thermistor to the plant Know the electrical limits of of your transducer and set the limits of the SLICE QTC accordin...

Страница 3: ...0 to 120 C Compatible Transducer TEC or resistive heater Compatible Sensor NTC thermistor 4 Temperature Stability 0 2 mK over 10 min 5 Precision 1 mK Control Capacity 40 W total 6 20 W max for a single channel Current Capacity 6 A per channel 7 Compliance Voltage 18 V 8 Input Output I O Voltage Range 10 V Triggering TTL Control Interface Control Front panel touch screen GUI Serial API Connections ...

Страница 4: ...ge of the front panel is shown in ﬁgure 4 The functions and connections are as follows Parameter input adjustment knobs 1 Control signal inputs 2 Signal monitor outputs 3 Touch screen with view of CH 2 Details screen 4 T plotted as a function of time blue line 5 System locked range yellow dashed lines 6 Fig 4 Front of SLICE QTC Rear Panel An image of the rear panel is shown in ﬁgure 5 The function...

Страница 5: ...s for this purpose are provided with the SLICE QTC Each has one end terminated with a CUI Inc PDP 40 connector for connecting to the CUI Inc CP 7240 ND connector on the SLICE QTC The other end is unterminated and is for connecting to your speciﬁc plant The pin out for connecting the cable Beldon 1502R 010500 to your speciﬁc plant is given in table 4 Connector Pin Number Color Function AWG 1 Red TE...

Страница 6: ...y or edit the values in a ﬁeld bordered in blue When a particular ﬁeld is actively being edited its border will change to yellow The Home Screen of the SLICE QTC is shown in ﬁgure 6 From the Home screen summary control over the four channels is possible including setting Tset initiating lock or entering an individual channel s Detail screen In general the status displayed in an editable ﬁeld is th...

Страница 7: ... 8 Back button Returns to previous screen Changes will be lost if not accepted before using the Back button Lock Button Fig 9 Lock button shown in unlocked mode Locks out further modiﬁcation of parameters Touch to lock or unlock parameter entry 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 param...

Страница 8: ...es the physical rotary knobs on the front panel and the pop up keypad on the touch screen When using the knobs to change the value of a parameter changes take eﬀect immediately When using the keypad changes do not take eﬀect until the enter key is depressed Rotary Knobs If you touch an editable ﬁeld for a brief moment a cursor will appear under one of the digits of the parameter value By turning t...

Страница 9: ...s the status of all four channels ﬁgure 6 The data for each channel is arranged vertically At a glance for each channel Tset Tact and T can be read as well as whether servo control is engaged If the loop is engaged and T is smaller than a user deﬁned range the Error value ﬁeld will be green indicating a locked state If T is outside this user deﬁned range this ﬁeld will turn yellow Setting the Temp...

Страница 10: ... button at the bottom of the column for the desired channel The button will turn white and read ON to indicate the SLICE QTC is actively controlling the temperature for that channel PID settings may still need to be input for the SLICE QTC to servo plant temperature correctly In ﬁgure 17 and ﬁgure 18 CH 1 is active and CHs 2 4 are inactive As the system approaches lock it will display T on a yello...

Страница 11: ...d background will change from green to yellow Change the speed of the rolling display touch the button and select from 1 to 20 s div Change the scale of the vertical axis touch the button and select from 1 mK div to 10 K div Pause and restart the rolling screen touch the button Turn on oﬀ cursors on the graph touch the button It is possible to drag the cursors across the display of T to measure an...

Страница 12: ...ng delivered to the transducer is displayed in the blue box on the right margin labeled Current A If you touch the blue box the box will rotate through displaying current through voltage across and power delivered to the transducer From this screen you can also set the various parameters for how the loop will behave Fig 21 Initial view of CH 1 Detail screen Setting Control Modes Touch the Settings...

Страница 13: ...select CH X Settings PID Params and the screen in ﬁgure 23 will appear The parameters for the PID loop ﬁlter are set in this popup screen These parameters control the closed loop behavior of the feedback Each of these parameters will need to be tuned speciﬁcally for your plant either manually or with the Auto Tune feature There are a number of methods to tune a loop We recommend the Ziegler Nichol...

Страница 14: ...te Limit oﬀ when changing use case Maximum Minimum Temperature Lock Range Set Maximum Minimum Temperature The maximum and minimum allowable temperatures Tmax and Tmin can be set as well as the range of T where the system is considered to be locked From a Channel Detail screen ﬁgure 21 tap Settings Temp Limits and the screen in ﬁgure 24 will appear It is advised to set Tmin above the dew point temp...

Страница 15: ...user will be prevented from adjusting the setpoint temperature to outside this range If the actual temperature exceeds this range the temperature will be displayed on a ﬂashing red background Minimum Temp ºC Shutdown Time s Sets the delay between when the temperature goes out of range and when the SLICE QTC shuts the current oﬀ Tab 6 Warning and Max Min If your plant is exposed to the atmosphere u...

Страница 16: ...correctly to NEGATIVE for use with NTC thermistors The thermistor data has been conﬁgured at the factory for a typical NTC thermistor that is 10 kΩ at 25 C Only NTC Negative Thermal Coeﬃcient thermistors can be used You can enter a new Beta value reference temperature and resistance value and the Steinhart Hart constants will be calculated automatically or vice versa NOTE The SLICE QTC can achieve...

Страница 17: ...can be conﬁgured to provide additional functionality A schematic of the input and output functionality is shown in ﬁgure 29 with the light blue boxes indicating the front panel I O The voltage range of the analog I O on the SLICE QTC is 10 V To program the functionality of the front panel I O from any screen touch the I O icon on the left sidebar You will be presented with the screen shown in ﬁgur...

Страница 18: ...speciﬁc to the chosen functionality To access these settings select the Settings gear icon that is just to the right of the selection window A pop up window will be presented that displays the various settings that can be adjusted for that feature Fig 29 Input Channels A B External Set Point In this mode an external signal can be used to supply the set point temperature of the plant The set point ...

Страница 19: ...allows a feedforward signal to be summed into the output of the PID loop ﬁlter The feedforward signal current is related to the input voltage Vin by Feedforward Current A Gain A V x Vin Oﬀset A Touch the Settings icon to the right of the channel selection to adjust the Gain and Oﬀset Slow Servo Input In some use cases it is convenient to have the temperature set point automatically adjusted to kee...

Страница 20: ...ble parameters This can be done either from the home screen or the single channel summary menu Gain polarity and setpoint can also be adjusted from the I O menu by pressing the gear icon next to the A or B input where the slow servo is enabled Choice Comment Oﬀ Value not read External Set Point Externally control the set point temperature External Temp Input Alternate input path for plant temperat...

Страница 21: ...ouch the Settings icon to the right of the channel selection to adjust the Gain and Oﬀset for these output signals as in ﬁgure 33 When porting the Temperature of a given loop to an Output setting the Gain equal to 0 1 V C and the oﬀset to 0 V will give a convenient 2 V output at 20 C Fig 32 Programming the output on Channel 1 Output Fig 33 Adjusting the Gain Oﬀset of Channel 2 Output When the SLIC...

Страница 22: ...LICE QTC is accomplished via a TTL trigger 13 0 to 0 8 V TTL is low and 2 to VCC is TTL high Trigger Out The Trigger Out on the back panel of the SLICE QTC can be forced to go high to alert an external device to a status change To program the trigger from any screen touch I O Trigger Out You will be presented with the screen shown in ﬁgure 35 Select those events on the desired channels for which y...

Страница 23: ...s under trigger control Attempting to run an auto tune on a channel with a trigger input enabled will bring up a dialogue External input not compatible with auto tune Turn external input oﬀ and continue Pressing OK will disable the trigger for that channel and begin the auto tune Pressing Cancel will dismiss the dialogue leaving the trigger enabled and the auto tune will cancel Additionally a trig...

Страница 24: ...rogress through several stages and the user will be updated on its progress through a loading bar Fig 37 An auto tune underway showing the loading bar Once the bar reaches 100 the user is given the option to accept review or cancel the results Fig 38 A completed auto tune with the Accept Review menu displayed Accepting the tune will set the PID parameters of the temperature channel based on the ca...

Страница 25: ... are canceled they can still be seen in the Settings Auto Tune menu System Settings Touching the System Settings button on the Control Bar ﬁgure 11 will open the System Settings screen as seen in ﬁgure 40 Fig 40 User programmable system settings User Interface Appearance From this screen adjustments to the brightness of the screen and the volume of the audio feedback can be made Input Impedance Ch...

Страница 26: ... the COM port for the device If viewed through the GUI there are no brightness or volume controls as these should be set on the PC directly Fig 41 User programmable system settings from host GUI Servo Manual Modes Under most circumstances the system will control the current to the transducer in order to minimize temperature ﬂuctuations of your thermal plant From time to time it may also be desirab...

Страница 27: ...steps involved Download and store the latest GUI executable from the Vescent FTP site or request copy of 1 executable GUI from sales at vescent dot com Connect the SLICE QTC to the PC using a USB type B cable 2 Turn on the SLICE QTC 3 On the PC double click on the SLICE QTC GUI to start the GUI 4 On your PC go to Start Control Panel Device Manager Ports 5 Identify which COM Port is labeled STMicro...

Страница 28: ...44 should appear if the connection is successful Fig 44 Ready to upgrade The GUI should now actively control the SLICE QTC You should only have to do the above steps once from a given 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...

Страница 29: ...ere 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 1 More cables may be purchased separately order p n 50 00005 2 Located in power receptacle on rear panel 3 Subject to change without notice 4 Nominal value 10 kΩ at room temperature Precision at temperatures removed from ...

Страница 30: ...ww vescent com manuals doku php id slice qt https www vescent com manuals Printed on 2022 07 21 23 14 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 ...

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