TE Technology TC-720 Instruction Manual

Thermoelectric cooler temperature controller

Table of Contents

Quick Links

15 90 K e an e Dr i ve

Tr a ve r se Ci ty , M I 49 6 96 U SA

www .te te c h .c o m

Instruction Manual

for

Model TC-720

and

Model TC-720 OEM

Thermoelectric Cooler

Temperature Controller

February 8, 2018

Drawing #5252 Rev. C

TECHNOLOGY, INC.

Ph o n e : ( 23 1) 92 9 -3 9 66

Fa x:

( 23 1) 9 29 - 41 63

e-m a il :

c o o l@ te te c h .c o m

Table of Contents

Need help?

Do you have a question about the TC-720 and is the answer not in the manual?

Questions and answers

Summary of Contents for TE Technology TC-720

Page 2 Instruction Manual apply to both the TC-720 and TC-720 OEM versions of the controller. Where “TC-720” is referenced, it is used generically and interchangeably for both the TC-720 and the TC-720 OEM versions of the controller, except where otherwise specifically noted.
Page 3 (including reasonable attorneys’ fees), injuries, liabilities or damages of any kind or nature whatsoever, arising out of the use or inability to use this TE Technology, Inc. product, from the omission or failure to use protection devices, or from failure to comply with this manual.
Page 4: Table Of Contents
Troubleshooting Controller ......................66 TC-720 Electrical Connections ...................... 69 TC-720 Mechanical Package Drawing ................... 70 TC-720 OEM Mechanical Package Drawing .................. 71 APPENDIX A-Thermistors Available for TC-720 ................72 Appendix B - USB Communications ....................78 Appendix C – Programming Custom Sensor Curves ..............96 Appendix D –...
Page 5: License Agreement
TE TECHNOLOGY, INC. (TE TECH) License Agreement CAREFULLY READ THE FOLLOWING TERMS AND CONDITIONS BEFORE OPENING THIS PACKAGE OR SIGNIFYING YOUR ACCEPTANCE BY CLICKING THE APPROPRIATE DIALOG BOX. OPENING THIS PACKAGE, CLICKING THE APPROPRIATE DIALOG BOX OR USING ANY PART OF THE SOFTWARE SIGNIFIES YOUR ACCEPTANCE OF (1) THESE TERMS AND CONDITIONS FOR THE LICENSED SOFTWARE, AND (2) THE TERMS OF ACCEPTANCE OF TE TECH FOR ANY PRODUCTS PURCHASED FROM TE TECH.
Page 6 EXCEPT AS PROVIDED IN SECTION 2.2 ABOVE, IF YOU TRANSFER POSSESSION OF ANY COPY OF THE LICENSED SOFTWARE TO ANOTHER PARTY WITHOUT WRITTEN CONSENT OF TE TECH, YOUR LICENSE IS AUTOMATICALLY TERMINATED. Any attempt otherwise to sublicense, assign or transfer any of the right, duties or obligations hereunder is void.
Page 7 The provisions of the United Nations Convention on the International Sale of Goods shall not apply to this Agreement Should you have any questions concerning this Agreement, contact TE TECH by writing to: TE TECHNOLOGY, INC., 1590 KEANE DRIVE, TRAVERSE CITY, MI 49696.
Page 8: Features
FEATURES TC-720 Temperature Controller The TC-720 is a bipolar temperature controller capable of automatically reversing power to Peltier thermoelectric (TE) devices to provide heating or cooling as required to maintain a specific set point temperature. It incorporates a keypad and a liquid-crystal display housed in a die-cast aluminum box.
Page 9 A potential disadvantage to PWM control is the generation of electromagnetic noise, particularly in high current applications. In such cases, the TC-720 can be configured as part of a linear control system to provide (1) a proportional analog output signal, and (2) a means of reversing the polarity of a drive voltage generated by an external power supply.
Page 10 CONTROL RANGE The TC-720 is supplied with one MP-3193 thermistor which provides a control range from -20 °C to +100 °C. For controllers with firmware revision K or later, the control range can be extended to -60 °C to +110 °C using the MP-3176 thermistor.
Page 11 The TC-720 is available in an OEM version, model TC-720 OEM. This is a basic version of the controller for Original Equipment Manufacturers (OEM’s). It is intended to be used in locations where the controller can be protected by a secondary enclosure and where the display, keypad, and box cover are not needed.
Page 12 A thermistor following the 10k-2 TP-53 curve, for example, is not a standard product offered by TE Technology and must be purchased separately from a third party. Other thermistors are available from www.tetech.com.) 2.
Page 13 • LED indicators for active USB communication, alarm conditions, and controller OK are included on both the TC-720 and TC-720 OEM. • ESD protection on USB port and inputs, when using provided external earth ground connection. • Computer programmable via USB communication. (A USB cable is required to interface with the controller, the cabled is included with the TC-720, but is not included with the TC-720 OEM.)
Page 14: Setup
In addition, the sensor itself needs to have a good thermal connection to the temperature control location. Thermal grease, such as the TP-1 from TE Technology, or other suitable thermal interface material should be applied to the interface of the sensor and temperature-control location.
Page 15 To connect the sensor leads to the controller (as well as other wire connections), you will first need to open up the controller. Remove the four screws from the top of the lid. Lift the lid from the controller, and set it face down next the box.
Page 16 See “Programming Custom Sensor Curves” in the appendix for instructions. The TC-720 can be used with either one or two separate DC power supplies for bipolar control of one TE device. If the maximum TE device operating voltage is less than 12 V, then two power supplies must be used with the controller.
Page 17 It is further recommended that such devices require the user to remove and correct the root cause of a fault before allowing the TC-720, the TE device, and related equipment to be re-energized. Protection devices should include, but are not limited to: •...
Page 18 1.3.1 ONE POWER SUPPLY OPERATION: Make sure the power supply is NOT energized while making electrical connections to the controller. The output voltage of the TE Power Supply should not exceed the maximum desired input voltage of the thermoelectric device, or the rated input voltage of the cooling assembly. If voltage is not between 12 V to 36 V then a two power supply configuration is necessary.
Page 19 1.3.2 TWO POWER SUPPLIES OPERATION: Make sure the power supplies are NOT energized while making electrical connections to the controller. The output voltage of the TE Device Power Supply should not exceed the maximum desired input voltage of the thermoelectric device, or the rated input voltage of the cooling assembly. If voltage is not between 12 V to 36 V then a two power supply configuration is necessary.
Page 20 1.3.3 LINEAR CONTROL OPERATION (ANALOG OUT CONTROL MODE): Make sure the power supplies are NOT energized while making electrical connections to the controller. The maximum output voltage of the TE Device Programmable Power Supply should not exceed the maximum desired input voltage of the thermoelectric device, or the rated input voltage of the cooling assembly.
Page 21 NOTE: LID IS REMOVED TO SHOW WIRE CONNECTIONS PIN 1 PIN 1 USB COMMUNICATION PORT to JP7-1 to JP7-2 WIRES MUST PASS THROUGH GASKET HOLES TE DEVICE to JP7-3 TE DEVICE PROGRAMMABLE POWER OPTIONAL CONTROL SUPPLY SECONDARY to JP7-4 SENSOR SENSOR JP2-1 (+) and JP2-4 (+) and...
Page 22 TE device and JP7-2. b) If a TE Technology cooler is being used, remove jumpers from the terminal block as described below. TE Technology’s standard thermoelectric cooling assemblies (TCA) usually have at least one fan on the heat sink. The standard configuration has the thermoelectric modules and fan(s) wired to a terminal block with jumpers across the terminals so that the fans and TE modules are connected electrically in parallel.
Page 23 The printed circuit board underneath the JP7 terminal block can reach a normal operating temperature of approximately 90 °C. The controller specifications are based on using wires connecting to JP7 to meet UL 1015 requirements and have a wire size of 2.02 mm effective cross-sectional area, which is comprised of 41 strands of 0.254 mm diameter copper wire.
Page 24 Connect other applicable devices to the controller: a) Connect optional external alarm LED indicators to JP2-10 (ALARM2) and/or JP2-8 (ALARM1), assuming ALARM1 will not be configured for PWM fan control. b) Connect optional enable/disable switch between JP2-6 and JP2-7 (or other circuit ground location). The controller will need to be software programmed to enable this feature (described in Section 4).
Page 25 If the fan only has two or three wires, it is likely not rated for PWM fan-speed control. If the fan is not rated for PWM fan-speed control it should not be used in this configuration. Using PWM fan-speed control with a fan that is not rated for it can damage the fan.
Page 26 d) ALARM1 or ALARM2 outputs could also be configured to power on or off devices such pumps or fans. Each alarm can manage up to 2 A of current. However, the total current comprised of the current passing through the alarm outputs plus the current passing through the TE device should not be allowed to exceed 20 A.
Page 27 Turn on power supply to the controller and power supply to the TE device if applicable and set controller and tuning parameters as necessary, described in Section 2 and Section 3 or in Section 4 using the software. The factory default is set to have output power to the TE device disabled when the controller is powered on for the first time.
Page 28: Display And Menu Options
2.0 DISPLAY AND MENU OPTIONS Note: this section applies only to the TC-720. Setup, programming, and communications with the TC-720 OEM controller can only be accomplished by using the computer software. Changes made to the controller using the keypad are always...
Page 29 DECREASE HIGH xxx LOW xxx TE TECHNOLOGY WWW.TETECH.COM INCREASE ALARM 1 TEMPS DECREASE HIGH xxx LOW xxx TE TECHNOLOGY TC-720 REV x T1=xx.xx°C BEGIN ALARM 1 FUNCTION OUT= OFF T2= xx KEEP OUTPUT ON OUTPUT ENABLE ALARM 2 TEMPS INCREASE...
Page 30 FROM PREVIOUS PAGE INCREASE TEMP1 OFFSET DECREASE x.xx°C INCREASE TEMP2 OFFSET DECREASE x.xx°C INCREASE CONTROL RANGE DECREASE HIGH xxx LOW xxx INCREASE CONTROL RANGE DECREASE HIGH xxx LOW xxx 15K-1 10K-2 10K-1 SENSOR 1 TYPE 5K-1 15K-1 USER DEF 230K-1 50K-1 15K-1 10K-2...
Page 31 T1= xx.x BEGIN EXIT START Be sure that OUTPUT ENABLE has been set to ON; otherwise, the ramp/soak program will run but the percent output power will remain a 0%. T1= xx.xx Sn= xx.xx T1= xx.x RESUME R/S PROGRAM T1= xx.x COMPLETE OUT= 0%/OFF T2= xx/RS OFF*...
Page 32 2 TEMPS must be turned OFF and/or ALARM 2 FUNCTION must be set to KEEP OUTPUT ON. LED Indicators The lower left of the TC-720 contains an ALARM LED underneath the symbol. The LED will be green if there is no alarm condition or orange if there is an alarm condition.
Page 33 Values: NO, YES Description: Leads to the Ramp/Soak program control, see sub flowchart #1. The Ramp/Soak program must be programmed using the TC-720 software. See the RAMP/SOAK CONFIGURATION under section 4.0 of the manual for further information. To run the program from the controller keypad: Be sure to set OUTPUT ENABLE to ON before starting the ramp/soak program.
Page 34 Note: For firmware J or earlier, the range of values is limited to -40.00 °C to +199.00 °C, or as defined by the limits set by CONTROL RANGE. If the set temperature in the TC-720 software program is set to less than -40.00°C while using firmware J or earlier, the set temperature will automatically update to a temperature within the -40.00 °C to...
Page 35 For example, suppose the controller has a set point of 10.00 °C, the bandwidth is set to 5 °C, and the TE device needs to cool in order to reach this temperature. The controller will provide -100% power (cooling mode) until the sensor temperature reaches 12.5°C.
Page 36 It works in a similar way to the integral gain, but it acts upon the change in the error, not the absolute error. For many thermoelectric systems such as the standard cooling assemblies sold by TE Technology acceptable control can be achieved by turning this function off (0.00).
Page 37 Description: This sets the high and low temperatures for signaling an alarm based on the optional, secondary sensor temperature. Adjustments are in 1 °C increments, and the high setting must be higher than the low setting. If the HIGH setting is increased past 199, OFF is indicated and no alarm will be signaled based on the secondary sensor for over-temperature conditions.
Page 38 Speed control should only be used on fans designed to have a controllable speed. Standard two-wire fans not designed for speed control may fail if operated with speed control, creating a hazardous condition. Fans supplied on TE Technology, Inc. products are NOT designed for speed control unless specifically stated. 2.4.12 TEMP 1 OFFSET Values: -10.0 °C to +10.0 °C...
Page 39 menu, the SET TEMPERATURE will automatically reset to be within the CONTROL RANGE, and the output power will adjust accordingly. The SET TEMPERATURE can then only be set within the CONTROL RANGE. 2.4.15 SENSOR 1, SENSOR 2 TYPE Values: 15K-1, 10K-2, 10K-1, 5K-1, User Defined, 230K-1, or 50K-1 Default value = 15K-1 Description: 15K-1 should be selected when using the supplied MP-3193 thermistor or other thermistors with equivalent...
Page 40: Controller Tuning
3.0 Controller Tuning This tuning method follows the Ziegler-Nichols closed-loop tuning principals. Briefly, the controller will first be set to a high proportional bandwidth setting with no integral or derivative function (integral gain and derivative gain = 0). Then, the bandwidth is gradually decreased until the temperature approaches set point and a small, sustained oscillation in temperature is observed.
Page 41 The control parameters are approximate settings. Further adjustments might be needed. Tuning Example using proportional bandwidth and integral gain: A. Suppose that smallest PROPORTIONAL BW setting that causes oscillation was determined to be 2.1 °C. B. It was then observed that the natural period of this oscillation was 2 minutes. C.
Page 42: Controller Software And Usb Communication
TC-720.exe file, and various support files to your hard drive. (The runtime engines require a minimum of approximately 320 MB of hard-disk space and 256 MB of RAM.) The LabVIEW runtime engine is required since the TC-720.exe is actually an executable version of a LabVIEW .vi file. The computer should ask you to restart. However, you might want to shut down the computer all the way first if you have not connected the controller to the serial port yet.
Page 43 “TC-720” if you are in fact using a TC-720 or TC-720 OEM supplied by TE Technology, Inc. For future use of the TC-720 when it is not connected to the computer, the DISPLAY CONTRAST dial can be adjusted to alter...
Page 44 If you are not able to establish communication with the controller, check the following conditions: 1) Verify the controller itself is receiving power from the power supply. 2) Make sure you the USB cable is securely connected to the port on the controller and on the computer. 3) Try closing the software program and restarting.
Page 45 CONTROL TEMPERATURE BOX The menu options allow for adjustment of the set temperature, whether a temperature from the secondary thermistor is displayed, and for adjusting the high and low limits of the set temperature. The values can be changed using the up or down menu buttons or by clicking on the number and typing in the desired value and then pressing enter.
Page 46 The 50k-1 TS-104 provides a control range from 0 °C to +150 °C. The MP-3022 is of this type. The 230k-1 TS-165 provides a control range from +25 °C to +199 °C. TE Technology does not offer standard thermistors of this type at the present time.
Page 47 Be sure that you have selected the correct sensor type. A dangerous condition could exist because the actual temperature could be higher or lower than the temperature being interpreted by the controller. The 5k-1 TS-141 sensor resolution will be reduced from 0.01 to 0.02 from -47 °C to -53 °C, and from 0.02 to 0.03 from -53 °C to -60 °C.
Page 48 This allows the controller to remember its settings even after power to the controller has been turned off. The TC-720 and TC-720 OEM automatically turn on EEPROM WRITE ENABLE when power is applied to the controller regardless of whether EEPROM WRITE ENABLE was turned off when power to the controller was removed. With EEPROM WRITE ENABLE turned on, any changes to the controller settings are automatically written to EEPROM.
Page 49 3. Select the file you wish to import and click Next 4. Choose to import Delimited Data Type and click Next 5. Select TAB as the delimiter and click Finish NOTE: If you want to save graphed data points to Microsoft Excel, you can use the computer mouse to right click on the graphed data and select “Export to Microsoft Excel”.
Page 50 put into JP7-3 and JP7-4. The H-bridge circuitry within the controller is used strictly to control the polarity of the voltage to the thermoelectric device, and is not used to vary the magnitude of that voltage. The magnitude of the voltage to the thermoelectric device is controlled by the analog output signal and a programmable linear-output power supply.
Page 51 RAMP/SOAK CONFIGURATION Clicking on the “CONFIGURE RAMP/SOAK” OK button calls up the following screen: The Ramp/Soak configuration contains 8 program steps. Each step has settings for the following: 1. Set Temp.—the set temperature that the controller should maintain 2. Ramp Time—the approximate amount of time the controller should take to reach the set temperature 3.
Page 52 “CONFIGURE RAMP/SOAK” screen may become buried at the bottom of the windows, including under the TC-720 main screen. Avoid navigating away from this screen, or if you do navigate away be aware that you need to minimize the other screens in Windows before you can see the “CONFIGURE RAMP/SOAK” screen.
Page 53 PROPORTIONAL + DEADBAND MODE CONFIGURATION This feature is typically used with air-to-air cooling assemblies (TE Technology AC-XXX models) when controlling the internal temperature of an enclosure. This feature is particularly useful to minimize power usage for applications that have a relatively wide portion of their operating temperature range in which heating or cooling is not required.
Page 54 enclosure to always be energized, even when the when an enclosure is being heated. In this case you may wish to use ALARM 2 to energize and de-energize the fan. To accomplish this, the following steps would be taken: 1. The negative terminal of the external fan would be connected to the ALARM 2 terminal, JP2-10. If using a TE Technology standard cooling assembly, be sure to remove the electrical jumper in the terminal block which connects the negative terminal of this fan to the negative terminal of the internal fan.
Page 55 ALARMS BOX The ALARM indicator will be grey if no alarm condition exists. It will flash between yellow and red if an alarm condition exists. The menu provides for adjusting alarm settings. The ALARMS text box will indicate the nature of the alarm if an alarm conditions exists. ALARM 1 SIGNAL provides three options: 1.
Page 56 Using PWM control on a fan not designed for it can create a hazardous condition by damaging or overheating the controller, the fan, and the TE device. The fans used in TE Technology’s Thermoelectric Cooling Assemblies are NOT designed to be speed controlled using PWM unless specifically indicated as such in the product literature.
Page 57 Alarm latches can be cleared by clicking the “CLEAR LATCHES” OK button in the GUI, by pressing the “up arrow” for 3 seconds (TC-720 only), or by de- energizing and reenergizing the temperature controller.
Page 58 The HIGH ALARM 2 SETTING, LOW ALARM 2 SETTING, and ALARM 2 DEADBAND function in the same manner as described above for ALARM 1 settings except that they are referenced to the secondary sensor. FAN CONTROL CONFIGURATION PRINCIPAL OF OPERATION: Fan speed control is designed to adjust the speed of the heat sink fan only. It allows the fan to operate at reduced speeds, and is used when the resulting loss of cooling capacity during speed regulation is an acceptable tradeoff for achieving lower fan noise.
Page 59 The FAN OPERATION HEAT MODE determines how the fan will be powered when the TE device is in the heating mode (main output% ≥ ~1%). • FAN OFF turns off output power to the fan when the controller switches to the heating mode. •...
Page 60 Example 1 Parameter Setting FAN OPERATION, HEAT MODE FAN OFF FAN PWM % MAXIMUM OUTPUT 100 % FAN PWM % MINIMUM OUTPUT 50 % INCREASE FAN SPEED STARTING AT 70 % NOTE: If the fan has been operating using fan control mode, and then the ALARM 1 SIGNAL is changed in the GUI from a “FAN CONTROL”...
Page 61 ON prior to shutting down the software if you intend to run the controller stand-alone from the computer. Otherwise, if you attempt to use the TC-720 OEM again without the software, you will not be able to turn the output on.
Page 62 If the output is disabled due to an over-current condition, the controller can be restarted by clicking the “CLEAR LATCHES” OK button in the ALARMS section, or by cycling power to the controller, or by pressing and holding the UP arrow on the controller itself (TC-720 only) for three seconds.
Page 63 SENSOR AND SET POINT DISPLAY The sensors and set point values are displayed on a waveform graph. The STACK/OVERLAY PLOTS button toggles between how the sensors and set point values are displayed. The graph below shows the plots in overlay mode where all the plots share a common Y-axis.
Page 64: Controller Schematic
In the STACK mode, the graphs are displayed individually as shown below. This set up provides individual Y-axes for each plot. NOTE: Right clicking in the graph brings up a menu of useful options, such as exporting data to Microsoft Excel. Controller Schematic...
Page 65 JP7-2 POWER TE DEVICE (LOAD) JP7-1 JP2-1 CONTROL SENSOR (+) JP2-2 CONTROL SENSOR (-) JP2-10 JP2-3 SECONDARY SENSOR (-) ALARM 2 JP2-4 SECONDARY SENSOR (+) OPEN DRAIN; 36 V, 2 A MAXIMUM +5 V 2500 OHMS JP2-6 INTERLOCK JP2-8 ALARM 1 OPEN DRAIN;...
Page 66: Troubleshooting Controller
DEFAULTS feature. This can be accomplished by using the GUI and selecting DOWNLOAD (see CONTROLLER OPTIONS BOX section), or by using the keypad on the TC-720 (Reference Section 2.4.16) and selecting LOAD DEFAULTS. If for some reason there is a setting awry, it may be easier to download defaults rather than trying to determine which of the parameters has been misapplied.
Page 67 The green LED on the controller may still flash if the controller intermittently receives sufficient operating voltage. CONTROLLER IN RAMP SOAK MODE: From the keypad, select RUN PROGRAM > NO (TC-720 only), or from the GUI select PID control mode. SYSTEM TEMPERATURE INCREASES WHEN COOLING EXPECTED:...
Page 68 IMPROPER SENSOR TYPE: Verify an NTC thermistor is being used and its Resistance-versus-Temperature (R-T) curve is one that is supported by the controller. Verify the proper SENSOR TYPE has been selected. Alternatively, you will need to use a user-defined sensor.
Page 69: Electrical Connections
TC-720 Electrical Connections JP7: (PIN 1 IS CLOSEST TO CORNER OF CIRCUIT BOARD) PIN 1: TE DEVICE (+) PIN 2: TE DEVICE (-) PIN 3: main power supply, V (-) PIN 4: main power supply, V (+), 36.0 V maximum (hard limit, do not exceed!)
Page 70: Mechanical Package Drawing
TC-720 Mechanical Package Drawing LIQUID CRYSTAL DISPLAY 2X16 CHARACTERS 97.92 121.67 5.61, TYP 5.64 137.85 149.1 USB LED, WHITE ALARM LED, ORANGE/GREEN 35.8 USB COMMUNICATION PORT PIN 1 PIN 1 (JP3) NOTE: All dimensions are in millimeters...
Page 71: Oem Mechanical Package Drawing
TC-720 OEM Mechanical Package Drawing ALARM LED, FLASHING ORANGE ONLY IF ALARM CONDITION EXISTS FLASHING GREEN LED (INDICATES CONTROLLER IS RECEIVING POWER) USB LED, WHITE 0.79 Ø4.78, TYP 96.52 104.8 52.4 106.38 10.31 4X HOLES FOR DIN RAIL ADAPTOR OPTIONAL ADDITIONS...
Page 72: Appendix A-Thermistors Available For Tc-720
APPENDIX A-Thermistors Available for TC-720 Note: All dimensions in millimeters. Standard thermistors have TS-67 (15 k-ohms) temperature-resistance curves. See www.tetech.com for additional styles.
Page 73 Ø3.61 25.4 (2) 26 AWG STRANDED WIRE, THRU UL1430, IRRADIATED CROSS-LINKED EPOXY FILL PVC INSULATION, ORANGE 3.94 3.18 6.35 6.35 SQ. 914.4 ALUMINUM BLOCK MP-3193 MP-3193 MP-2444 MP-2444 MP-2542 MP-2542 MP-2542 TS-67 Temperature (°C) versus Resistance (ohms) Data For MP-3193, MP-2444, MP-2542, and MP-2996 (not pictured) 15 kΩ Thermistors...
Page 74 146735.0 46709.0 17136.0 7075.0 3227.0 1601.0 138447.0 44397.0 16388.0 6801.0 3115.0 1551.0 130677.0 42213.0 15676.0 6539.0 3008.0 1503.0 123390.0 40150.0 15000.0 6289.0 2905.0 1457.0 116554.0 38199.0 14356.0 6049.0 2806.0 1412.0 110138.0 36354.0 13744.0 5820.0 2711.0 1369.0 104113.0 34608.0 13161.0 5600.0 2620.0 1328.0 98454.0...
Page 75 TS-91 Temperature (°C) versus Resistance (ohms) Data For 10 kΩ Type 1 Thermistors 97120.0 31040.0 10920.0 4544.0 2082.0 91660.0 29500.0 10450.0 4368.0 2012.0 86540.0 28060.0 10000.0 4202.0 1942.0 81720.0 26680.0 9574.0 4042.0 1876.0 77220.0 25400.0 9166.0 3888.0 1813.0 72980.0 24180.0 8778.0 3742.0 1751.0...
Page 76 TS-104 Temperature (°C) versus Resistance (ohms) Data For MP-3022 50 kΩ Thermistors 163300.0 47870.0 16700.0 6705.0 3025.0 1503.0 155200.0 45830.0 16080.0 6490.0 2940.0 1465.0 147500.0 43890.0 15490.0 6280.0 2857.0 1429.0 140300.0 42040.0 14930.0 6080.0 2778.0 1394.0 133400.0 40290.0 14390.0 5890.0 2701.0 1360.0 127000.0...
Page 77 TS-165 Temperature (°C) versus Resistance (ohms) Data For 230 kΩ Thermistors 231438.2 35099.7 7792.1 2289.3 830.8 221032.6 33847.4 7567.0 2234.8 814.3 211147.1 32645.5 7349.4 2181.9 798.1 201753.2 31491.9 7139.0 2130.4 782.4 192824.2 30384.2 6935.4 2080.3 767.0 184334.8 29320.7 6738.6 2031.6 752.0 176261.5 28299.2...
Page 78: Appendix B - Usb Communications
The 8 bit (modulo 256) checksum of characters sent/from the controlling computer. This is represented as two ASCII hex characters. The checksum excludes the characters (stx), SS, and (etx). The TC-720 sums (in an 8-bit register) the ASCII values of the characters sent to/from the controlling computer. Any overflow is truncated, leaving the 8-bit (modulo 256) checksum.
Page 79 III. Examples: A) Send the set temperature of 10.00 to the controller. 1. The control command, CC, for “FIXED DESIRED CONTROL SETTING” is 1c. 2. Multiply the desired set-point temperature by 100 (10.00 x 100 = 1000 3. Convert 1000 decimal to hexadecimal (3e8 ) and add on leading zeros to make the four-character send value DDDD (03e8).
Page 80 ASCII Character: Hexadecimal Value: The 8-bit checksum is the 8 least significant binary bits of the sum, represented as f7 in hexadecimal. 5. Combining all of these characters in one string we send: (stx)1cff6af7(etx). 6. If the temperature controller receives the command and the checksum is correct, it will send back: (stx)ff6a63(ack).
Page 81 1. MODEL CODE Write Command: NA Read Command: 00 Interpret: 9625 returned. (This is an internal code to ensure the TC-720 software is communicating with an actual TC-720.) 2. INPUT1 (reads the value sensed by the primary sensor) Write Command: NA...
Page 82 7. PROPORTIONAL BANDWIDTH Write Command: 1d Read Command: 51 Interpret: proportional bandwidth in °C. For writing, multiply the desired bandwidth by 100 then convert to hexadecimal. For reading, convert the returned hexadecimal to decimal, and then divide by 100 1.00 °C bandwidth would be 100 20.00 °C bandwidth would be 2000...
Page 83 13. SENSOR2 CHOICE Write Command: 47 Read Command: 7c Interpret: 0 == 5 kΩ thermistor 1 == 10 kΩ thermistor, type 1 (TS-91) 2 == 10 kΩ thermistor, type 2 (TP-53) 3 == 15 kΩ thermistor 4 == 50 kΩ thermistor 5 == 230 kΩ...
Page 84 20. LOW ALARM2 SETTING Write Command: 28 Read Command: 5c Interpret: Temperature reference to compare against INPUT2 for low alarm output. Note: Values must be whole numbers/integers. Do not represent number with decimal places. 10 °C is simply or 000a 21.
Page 85 25. SENSOR FOR ALARM2 Write Command: 3a Read Command: 6e Interpret: 0 == monitors INPUT2 for ALARM2 1 == monitors INPUT1 for ALARM2 26. ANALOG OUTPUT MULTIPLIER Write Command: 2f Read Command: 63 Interpret: For writing, multiply the desired analog output multiplier by 100 , and then convert to hexadecimal.
Page 86 32. INPUT2 SECONDARY SENSOR OFFSET Write Command: 32 Read Command: 66 Interpret: Value to offset INPUT2 by in order to calibrate sensor. 33. HEAT MULTIPLIER Write Command: 34 Read Command: 68 Interpret: This multiplies the heater percentage of power to offset its effectiveness. Sending 0 will prevent the controller from applying any power when heating would otherwise be required.
Page 87 39. LOW PWM % FAN Write Command: 38 Read Command: 6c Interpret: Allowable range is 0 to 100 This is the low fan PWM % in cooling mode when using fan speed control. LOW PWM % FAN should always be less than HIGH PWM % FAN. 40.
Page 88 46. RAMP/SOAK status Write Command: NA Read Command: 09 Interpret: Convert the returned hexadecimal value to binary and interpret the bits as follows: All zeros means no sequence running. Bit 0 == means sequence running. Bit 1 == means SOAK stage. Bit 2 == means RAMP stage.
Page 89 For example, sending a value of 20 would set the base timer to 1.0 seconds (20 x 0.05 = 1.0). When using TE Technology’s GUI, the base increment counter is set to 20 so that the time scale in the ramp / soak user interface program is accurate.
Page 90 60. PROPORTIONAL + DEADBAND START COOL SET Write Command: 43 Read Command: 78 Interpret: To send the high dead set temperature, multiply the decimal value by 100 and convert to hexadecimal. To read the high dead set temperature, convert the returned hexadecimal value to decimal, and then divide by 100 If the INPUT1 sensor is greater than the PROPORTIONAL + DEADBAND START HEAT SET temperature but less than the PROPORTIONAL + DEADBAND START COOL SET temperature, then the controller will...
Page 91 Interpret: Acceptable values range from 0 to 7. This is the index number is used to set which PROGRAM STEP the INTEGRAL GAIN RAMP/SOAK ARRAY VALUE will be written. (Reference PROGRAM STEP number in TE Technology’s LabVIEW-based GUI, Ramp Soak programming). The index number + 1 = PROGRAM STEP number.
Page 92 Interpret: Acceptable values 0 through 7. This is the index number is used to set which PROGRAM STEP the DERIVATIVE RAMP/SOAK ARRAY VALUE will be written. (Reference PROGRAM STEP number in TE Technology’s LabVIEW-based GUI, Ramp Soak programming). The index number + 1 = PROGRAM STEP number.
Page 93 V. ASCII Reference Table Dec Oct Hex Binary Description 000 000 00 00000000 ^@ ^` NULL NUL null c-@ c-` 001 001 01 00000001 ^A ^a SOH GTL c-A c-a start-of-heading 002 002 02 00000010 ^B ^b STX c-B c-b start-of-text 003 003 03 00000011 ^C ^c ETX c-C c-c end-of-text 004 004 04 00000100 ^D ^d EOT SDC end-of-transmission c-D c-d ..._._ 005 005 05 00000101 ^E ^e ENQ PPC c-E c-e enquiry...
Page 94 047 057 2F 00101111 / right-slash 048 060 30 00110000 0 049 061 31 00110001 1 050 062 32 00110010 2 051 063 33 00110011 3 052 064 34 00110100 4 053 065 35 00110101 5 054 066 36 00110110 6 055 067 37 00110111 7 056 070 38 00111000 8 057 071 39 00111001 9...
Page 95 098 142 62 01100010 b 099 143 63 01100011 c 100 144 64 01100100 d 101 145 65 01100101 e 102 146 66 01100110 f 103 147 67 01100111 g 104 150 68 01101000 h 105 151 69 01101001 i 106 152 6A 01101010 j 107 153 6B 01101011 k 108 154 6C 01101100 l...
Page 96: Appendix C - Programming Custom Sensor Curves
Appendix C – Programming Custom Sensor Curves Hardware operation: First let’s look at the controller’s sensor circuitry. Sensors are connected to JP2 at terminals 1 and 2 (control sensor), and 3 and 4 (secondary sensor). Each sensor is in series with a 6650 ohm resistor that forms a voltage divider. +5 V 6650 ohm JP2-1 or -4...
Page 97 INDEX VOLTAGE TEMP. INDEX VOLTAGE TEMP. INDEX VOLTAGE TEMP. 0.00 1.68 62.8 3.36 27.2 0.04 1.72 61.8 3.40 26.4 0.08 1.76 60.8 3.44 25.5 0.12 1.80 59.9 3.48 24.7 0.16 1.84 58.9 3.52 23.8 0.20 1.88 3.55 23.1 0.23 1.91 57.3 3.59 22.3...
Page 98 You must now create a .csv file. This is most easily created using Excel by entering the temperatures in a single column. You could also use a text editor with each line containing only one temperature and a carriage return. The screen shot below of an Excel spreadsheet shows how this should look.
Page 99 The controller is not limited to using thermistors. It can also use such devices as the LM335 where its voltage varies linearly with temperature. The following example shows how to set up the controller to use an LM335. The LM335 provides a linear output voltage directly proportional to temperature at 10 mV/K. It provides a range from -40 °C to 100 °C.
Page 100: Appendix D - Programming Ramp/Soak Routines
Appendix D – Programming Ramp/Soak Routines Ramp/Soak routines can be created to run long repeated processes or simple routines. In the example shown below, the controller will begin applying power to the TE device in the heating or cooling mode as required in order to reach 25 °C in 100 seconds.
Page 101 The controller will execute steps 1, 2, and 3 twelve times b. The controller will execute steps 4, 5, and 6 twelve times. The controller will execute step 7 d. The controller will repeat the sequences in a, b, and then c 3600 times. The program stops in step 8 because it contains all zeros.
Page 102: Appendix E - Additional Notes On Fan Control
These are similar to three wire speed controllable fans, so refer to the notes regarding 3-wire fans. 4-wire fans often have an additional output wire used as a speed monitor or an output alarm. The TC-720 cannot monitor these inputs. Be sure...
Page 103 Example 1: Adjusting fan Fan Control Examples output based on TE PWM output value. Example 1 Parameter Setting FAN OPERATION, HEAT MODE FAN OFF FAN PWM % MAXIMUM OUTPUT 100 % FAN PWM % MINIMUM OUTPUT 50 % INCREASE FAN SPEED STARTING AT 70 % Example 2: A linear ramp in fan PWM output% as a function of...
Page 104 Example 3: This is the only fan control configuration acceptable for use with a 2 wire, non-speed controllable fan; the fan is either completely on or completely off. Example 3 Parameter Setting FAN OPERATION, HEAT MODE FAN OFF FAN PWM % MAXIMUM OUTPUT 100 % FAN PWM % MINIMUM OUTPUT 100 %...
Page 105 The graph above in this example is based on the fan Manufacturer’s published relationship between fan PWM Duty Cycle and rotational speed.

This manual is also suitable for:

Tc-720 oem

TE Technology TC-720 Instruction Manual

Quick Links

Need help?

Questions and answers

Subscribe to Our Youtube Channel

Related Manuals for TE Technology TC-720

Summary of Contents for TE Technology TC-720

This manual is also suitable for:

Table of Contents