background image

© 2022

www.teamWavelength.com

36

WTC3243 TEMPERATURE CONTROLLER

CERTIFICATION AND WARRANTY

CERTIFICATION

Wavelength  Electronics,  Inc.  (Wavelength)  certifies  that  this 

product met its published specifications at the time of shipment. 

Wavelength further certifies that its calibration measurements are 

traceable to the United States National Institute of Standards and 

Technology, to the extent allowed by that organization’s calibration 

facilities, and to the calibration facilities of other International 

Standards Organization members.

WARRANTY

This Wavelength product is warranted against defects in materials 

and workmanship for a period of one (1) year from date of shipment. 

During the warranty period, Wavelength will, at its option, either 

repair or replace products which prove to be defective. 

WARRANTY SERVICE

For warranty service or repair, this product must be returned to the 

factory. An RMA is required for products returned to Wavelength 

for warranty service. The Buyer shall prepay shipping charges to 

Wavelength and Wavelength shall pay shipping charges to return 

the product to the Buyer upon determination of defective materials 

or workmanship. However, the Buyer shall pay all shipping 

charges, duties, and taxes for products returned to Wavelength 

from another country.

LIMITATIONS OF WARRANTY

The warranty shall not apply to defects resulting from improper 

use or misuse of the product or operation outside published 

specifications.  No  other  warranty  is  expressed  or  implied. 

Wavelength  specifically  disclaims  the  implied  warranties  of 

merchantability and fitness for a particular purpose. 

EXCLUSIVE REMEDIES

The remedies provided herein are the Buyer’s sole and exclusive 

remedies. Wavelength shall not be liable for any direct, indirect, 

special, incidental, or consequential damages, whether based on 

contract, tort, or any other legal theory.

REVERSE ENGINEERING PROHIBITED

Buyer, End-User, or Third-Party Reseller are expressly prohibited 

from reverse engineering, decompiling, or disassembling this 

product.

NOTICE

The information contained in this document is subject to change 

without notice. Wavelength will not be liable for errors contained 

herein or for incidental or consequential damages in connection 

with the furnishing, performance, or use of this material. No part of 

this document may be translated to another language without the 

prior written consent of Wavelength.

SAFETY

There are no user-serviceable parts inside this product. Return the 

product to Wavelength Electronics for service and repair to ensure 

that safety features are maintained.

LIFE SUPPORT POLICY

This important safety information applies to all Wavelength 

electrical and electronic products and accessories:

As a general policy, Wavelength Electronics, Inc. does not 

recommend the use of any of its products in life support applications 

where the failure or malfunction of the Wavelength product can 

be reasonably expected to cause failure of the life support device 

or  to  significantly  affect  its  safety  or  effectiveness.  Wavelength 

will not knowingly sell its products for use in such applications 

unless it receives written assurances satisfactory to Wavelength 

that the risks of injury or damage have been minimized, the 

customer assumes all such risks, and there is no product liability 

for Wavelength. Examples of devices considered to be life support 

devices  are  neonatal  oxygen  analyzers,  nerve  stimulators  (for 

any  use),  auto-transfusion  devices,  blood  pumps,  defibrillators, 

arrhythmia detectors and alarms, pacemakers, hemodialysis 

systems, peritoneal dialysis systems, ventilators of all types, and 

infusion pumps as well as other devices designated as “critical” 

by the FDA. The above are representative examples only and are 

not intended to be conclusive or exclusive of any other life support 

device.

REVISION HISTORY

DOCUMENT NUMBER: WTC3243-00400

REV.

DATE

CHANGE

N

August 2014

Added Accuracy specification

O

August 2015

Updated Compliance Voltage 

specification

P

May 2016

Updated wiring diagrams

Q

March 2019

Updated pin length & tolerance, 

added solderability and 

washability specifications

WAVELE

n

GTH

 

E L E C T R O N I C S

51 Evergreen Drive

Bozeman, Montana 59715

406-587-4910  (tel)

406-587-4911  (fax)

Sales & Tech Support

[email protected]

[email protected]

Summary of Contents for WTC3293

Page 1: ...ATIONS The robust and reliable WTC3243 has been designed into electro optical systems airborne instrumentation spectroscopic monitors and medical diagnostic equipment It is particularly well suited to...

Page 2: ...rminethattheunitwillbeoperatingwithinthe internalheatdissipationSafeOperatingArea SOA Visit the Wavelength Electronics website for the most accurate up to date and easy to use SOA calculator www teamw...

Page 3: ...ge 25 Control Parameters PGAIN Table 5 on page 14 Equation 1 RP Table 11 on page 27 I TERM Table 5 on page 14 Equation 3 RI Table 12 on page 27 Bias Current Sensor Bias Switch Table 4 on page 13 Figur...

Page 4: ...Gain Remove R8 and load R54 I TERM To set a Fixed I Term Remove R13 and load R55 TP7 TP4 TP3 TP5 CW W CCW R5 200K TP6 C5 0 1UF C6 0 1UF R50 N L R51 N L Set T To set a Fixed Set point Voltage Remove R...

Page 5: ...peration requires that VDD be 8 V or greater 10 BIAS Sensor Bias Current Resistor Connection Connect a resistor between BIAS Pin 10 and VDD Pin 1 to configure the sensor bias current 11 OUTA Thermoele...

Page 6: ...y input for output stage Directly connected to WTC3243 VS Pin 14 PGND Power Ground Directly connected to WTC3243 GND Pin13 Terminal Block 2 TB2 Auxiliary Terminal Block FAN Fan Positive Red wire conne...

Page 7: ...ET to Sensor Voltage 1 V V The controller drives the TEC or heater to make the voltage across the sensor match the RSET voltage SET T Monitor to VSET 1 V V The setpoint temperature monitor voltage mat...

Page 8: ...VS 1 0 Volts Full temp range IOUT 2 2 A Short Term Stability 1 hour 0 0009 C OFF ambient temperature TSET 25 C using 10 k thermistor 1 Short Term Stability 1 hour 0 002 C ON ambient temperature TSET 2...

Page 9: ...ude the tolerance of the bias current resistor THERMAL Heatspreader Temperature Rise 28 to 33 C W TAMBIENT 25 C Heatspreader Temperature Rise 18 to 25 C W With WHS302 Heatsink WTW002 Thermal Washer He...

Page 10: ...put voltage range 0 6 5 VSET X 0 2 5 VSET T Volts X is the external setpoint jumper T is the internal trimpot jumper ACT T MON output voltage range 0 to VDD Volts Limited by bias current circuit 1 Sen...

Page 11: ...easures the load temperature by driving a current through the temperature sensor and measuring the voltage drop across it It may be useful to remember that you do not directly adjust the setpoint temp...

Page 12: ...operation WTC3243 Temperature Controller WTC3293 PCB evaluation board Digital multimeter 4 digit resolution recommended Thermistor or other temperature sensor Peltier type thermoelectric module or res...

Page 13: ...T is Source Trimpot is Source Factory Default Figure 7 VSET Source Jumper Settings SET THE SENSOR BIAS SWITCH Use Table 4 to configure the evaluation board for your temperature sensor type Sensor sign...

Page 14: ...not match the table if the WTC3243 is installed P GAIN I TERM Figure 10 Location of the P GAIN and I TERM Trimpots Table 5 suggests starting points for P GAIN and I TERM depending on your sensor type...

Page 15: ...ATION BOARD The notch at the top of the WTC3243 must be orientedatthetopofthePrintedCircuitBoard PCB ThisorientationplacesPIN1intheupper left corner See Figure 11 below for proper orientation USE WITH...

Page 16: ...d on the WTC so the location of the wires matches your PCB Screw 4 40 PHPH x 0 75 w o FAN x 1 with FAN 30 mm FAN WXC303 5 VDC or WXC304 12 VDC WHS302 Heatsink WTW002 Thermal Washer WTC3243 Heat Spread...

Page 17: ...tion The 2 5 mm input power jack is attached to VDD You can use the Wavelength PWRPAK power supplies with this jack Use either the power jack or the power inputs on TB1 not both TheCOMMON COM terminal...

Page 18: ...gative termination directly to Pin 13 GND to avoid parasitic resistances and voltages affecting temperature stability and accuracy Connect thermistors and RTD sensors which are not polarized to SEN an...

Page 19: ...mpot can be adjusted from 0 V to 5 V To get above 4 5 V increase VDD to a minimum of 5 5 V To read the actual temperature and setpoint temperature of the device the power needs to be connected NOTE If...

Page 20: ...arts are included in this datasheet for quick reference but we recommend you use the online tools instead Refer to the SOA calculator for the WTC3243 www teamwavelength com support design tools soa tc...

Page 21: ...on the WHY5640 is reversed or mirrored relative to the position of Pin 1 on the WTC3243 VS VDD TIE GROUND CONNECTIONS DIRECTLY TO PIN 13 1 WTC3243 Temperature Controller 1 2 3 4 5 6 7 14 13 12 11 10...

Page 22: ...ual Temperature Monitor voltage VDD RT RTD RBIAS RI RP RLIMA RLIMB RG Adjusting PI Control Loop Adjusting Limit Currents VSET VSET Sensor Resistance X Sensor Bias Current X 10 for 100 RTDs 1 1 1 NOTE...

Page 23: ...5640 The position of Pin 1 on the WHY5640 is reversed or mirrored relative to the position of Pin 1 on the WTC3243 TOP VIEW VS VDD TIE GROUND CONNECTIONS DIRECTLY TO PIN 13 1 WTC3243 Temperature Contr...

Page 24: ...or mirrored relative to the position of Pin 1 on the WTC3243 TOP VIEW VS VDD TIE GROUND CONNECTIONS DIRECTLY TO PIN 13 1 WTC3243 Temperature Controller 1 2 3 4 5 6 7 14 13 12 11 10 9 8 Actual Temperat...

Page 25: ...Figure 25 shows fixed heating and cooling limits and is the standard implementation Figure 25 Fixed Heat and Cool Current Limits Figure 26 diagrams setting current limits independently using trimpots...

Page 26: ...or values for RBIAS and RG for various sensors and resistance values Equation 7 demonstrates how to calculate a value of RBIAS given a desired sensor bias current IBIAS Equation 7 Calculating RBIAS RB...

Page 27: ...ion 10 Calculating PGAIN from RP PGAIN 100 A V 100 000 1 RP SET THE CONTROL LOOP INTEGRATOR TIME CONSTANT To set the control loop Integrator Time Constant ITC insert a resistor RI between 1V Pin 6 and...

Page 28: ...CW terminal to the pin marked COM Do not use less than 2 k resistance or the 2 5 V will droop FAN REN HSET COM W CW CCW 2 5 V TB2 SET T ACT T LIMA LIMB COM RSET TB3 Figure 28 Example Wiring External R...

Page 29: ...43 installed Measure the PGAIN trimpot value across pins TP5 TP6 Remove resistor P2 Load P1 with a resistor of the value measured 1206 size BOTTOM VIEW RESISTOR LOCATIONS TOP VIEW TEST POINT LOCATIONS...

Page 30: ...LB2 and LB1 and TP4 TP1 respectively TOP VIEW TEST POINT LOCATIONS BOTTOM VIEW RESISTOR LOCATIONS Figure 32 LIMA LIMB Settings CHANGING ONBOARD SETPOINT TRIMPOT TO A FIXED RESISTANCE Connect an ohmme...

Page 31: ...ller VDROP VS VMAX VS is the power supply voltage Mark VDROP on the X axis and extend a line upward Mark IMAX on the Y axis and extend a line to the right until it intersects the VDROP line On the X a...

Page 32: ...mponents of the thermal load Use thermal paste or washers between the load TEC and the TEC heatsink interfaces Ensure the temperature sensor is in good thermal contact with the load Unit may be operat...

Page 33: ...ase the current limit but DO NOT exceed the specifications of the TEC or heater The WTC3293 is not producing current The P GAIN or I TERM may be turned all the way counter clockwise CCW Turn the P GAI...

Page 34: ...00 2 54 1 30 33 0 0 20 5 1 1 26 32 0 0 33 1 28 32 5 0 945 24 00 0 945 24 00 2 PLS 4 40 UNC WTC3243 0 125 3 18 Thru 0 25 6 4 DIA KEEPOUT 4 Required 0 038 0 97 Dia Thru Hole 0 060 1 52 Dia Pad 14 Requir...

Page 35: ...19 4 83 1 880 47 75 57 15 2 25 0 19 4 83 0 17 4 32 2 42 61 47 0 13 3 3 THRU 4 PLS All dimensions are inches mm All tolerances are 5 Direction for Recommended Airflow Weights WTC3293 WTC3243 1 6 oz WHS...

Page 36: ...ion contained in this document is subject to change without notice Wavelength will not be liable for errors contained herein or for incidental or consequential damages in connection with the furnishin...

Reviews: