USB-2001-TC User's Guide - from Measurement Computing
Contents
1. install DAQFlex software before you install the hardware To connect the USB 2001 TC to your system connect a USB cable from the USB connector to either a USB port on the computer or to an external USB hub connected to the computer No external power is required If the LED turns off If the LED is on but then turns off the computer has lost communication with the USB 2001 TC To restore communication disconnect the USB cable from the computer and then reconnect it This should restore communication and the LED should turn on USB 2001 TC User s Guide Installing the USB 2001 TC Programming and developing applications You can program and develop applications for the USB 2001 TC using DAQFlex software OEM users can create a custom driver for use with the message based firmware to interface with the device Refer to the DAQFlex Software User s Guide for information about DAQFlex software Refer to the Message based Firmware Specification for information about the message based firmware Chapter 3 Functional Details Components The USB 2001 TC has the following components Thermocouple input USB cable and connector LED indicator Thermocouple input You can connect one thermocouple to a standard thermocouple subminiature connector Thermocouple types J K R S T N E and B are supported The thermocouple type you select will depend on your application needs Review the temperature ranges and accuracies2. of each type to determine which thermocouple is best suited for the application Connect the positive lead of the thermocouple to the TC terminal and the negative lead of the thermocouple to the TC terminal TC TC Figure 3 TC input terminals If you are unsure which of the thermocouple leads is positive and which is negative check the thermocouple documentation or the thermocouple wire spool Subminiature connector Figure 4 Connecting a thermocouple For best results use insulated or ungrounded thermocouples when possible If you need to increase the length of your thermocouple use the same type of thermocouple wires to minimize the error introduced by thermal EMFs Temperature measurement errors depend in part on the thermocouple type the temperature being measured the accuracy of the thermocouple and the cold junction temperature Thermocouple with bare wire leads If your thermocouple has bare wire leads you can purchase a screw terminal subminiature connector to use with the USB 2001 TC These are available from a number of suppliers such as Nanmac Corporation www nanmac com For the best accuracy the subminiature connector type and thermocouple type should match USB 2001 TC User s Guide Functional Details Figure 5 shows the screw terminal connector wiring gt Figure 5 Screw terminal connector wiring USB connector The USB connector provides 5 V power and communication The voltage
3. supplied through the USB connector is system dependent and may be less than 5 V No external power supply is required LED indicator The device LED indicates the communication status and uses up to 5 mA of current LED behavior Condition Specification On steady green The device is powered and ready for operation On blinking green The device is powered but not yet enumerated by the USB Off The device is not powered or is in USB suspend Analog input circuitry Figure 6 shows the analog input circuitry The thermocouple channel passes through a differential filter and is sampled by a 20 bit analog to digital converter ADC ADC protection GND Figure 6 Analog input circuitry Open thermocouple detection OTD The USB 2001 TC is equipped with open thermocouple detection With OTD any open circuit condition at the thermocouple sensor is detected by the software An open channel is detected by driving the input voltage to a positive value outside the range of the thermocouple output The software recognizes this as an invalid reading and returns the value OTD During an open thermocouple condition some invalid values may be returned before the open thermocouple is reported Check the STATUS value before reading temperature values To ensure that valid temperature readings are returned verify that the value of STATUS is READY before taking measurements Invalid temperature readings may be returned i
4. you are reading Caution Shaded caution statements present information to help you avoid injuring yourself and others damaging your hardware or losing your data bold text Bold text is used for the names of objects on a screen such as buttons text boxes and check boxes italic text Italic text is used for the names of manuals and help topic titles and to emphasize a word or phrase Where to find more information Additional information about the USB 2001 TC is available on our website at www mccdaqg com You can also contact Measurement Computing Corporation by phone fax or email with specific questions Phone 508 946 5100 and follow the instructions for reaching Tech Support Fax 508 946 9500 to the attention of Tech Support Email techsupport mccdag com Chapter 1 Introducing the USB 2001 TC The USB 2001 TC is supported under the following operating systems Microsoft Windows 7 Vista XP 32 bit or 64 bit Macintosh 32 bit or 64 bit Linux 32 bit or 64 bit The USB 2001 TC is a USB 2 0 full speed device It is designed for USB 2 0 ports and was tested for full compatibility with both USB 1 1 and USB 2 0 ports The USB 2001 TC provides one thermocouple input channel Thermocouple types J K R S T N E and B are supported The thermocouple type is software programmable and stored on the device A 20 bit ADC processes the data conversions Thermocouple input ranges are 73 125 mV calibrated
5. C esns oone o a A a ea AEO ATTON 7 Installino thie MAW a a ls le 7 Programming and developing applications srenti aei a aE a a 8 Chapter 3 FUNCIONA DAS leas sawedeetutsntbipeceeeeduawels aa aa aR Aa 9 COMPOST uae dausmrnad estate th Oeste usnn nd i aaceennehd adeodtus mane tated tals 9 TEM MOCOUD IEDU Cen o E O cuceateancec neuen N N E N eats vaheacuaeene 9 USB COMMS CO eines es dct ctw ib 10 LED tt at ot tas 10 A alos INOUE CIU ao do rd od dla diiincia 10 Open thermocouple detect Om OTD ada ii iida 10 Thermocouple Measurement accurate 11 Cold junction temperature Measurement ACCULACY aid A A a A A E 11 Mechanical Wines O o acted de Ocio 11 Chapter 4 SPECMICA MONA iaa 12 ChannelconfgurationS seinn a an 12 Compatible thermocouple S socials ica 13 Te mperit re CCU los 13 Dia QUOI PA o O PRE E O laa nes sbeahe ates tana T E Maus ted candies laame ates 16 POWER TAS A AS 16 Saey VONAL cs A OU E e A In enon r Y BUSANO a Te o O at er encom ener Teeter Centers A A o ree 17 Mechanical dada cla cl 17 PTV IRON MICTIU oneone tana tse O EE 17 Declaration Of CONTO MV oros ias 18 Preface About this User s Guide What you will learn from this user s guide This user s guide describes the Measurement Computing USB 2001 TC data acquisition device and lists device specifications Conventions in this user s guide For more information Text presented in a box signifies additional information and helpful hints related to the subject matter
6. USB 2001 TC USB based Thermocouple Input User s Guide Document Revision 5 Fa 0 FA MEASUREMENT e e VK ap COMPUTING Your new Measurement Computing product comes with a fantastic extra Management committed to your satisfaction Thank you for choosing a Measurement Computing product and congratulations You own the finest and you can now enjoy the protection of the most comprehensive warranties and unmatched phone tech support It s the embodiment of our mission To provide data acquisition hardware and software that will save time and save money Simple installations minimize the time between setting up your system and actually making measurements We offer quick and simple access to outstanding live FREE technical support to help integrate MCC products into a DAQ system Limited Lifetime Warranty Most MCC products are covered by a limited lifetime warranty against defects in materials or workmanship for the life of the product to the original purchaser unless otherwise noted Any products found to be defective in material or workmanship will be repaired replaced with same or similar device or refunded at MCC s discretion For specific information please refer to the terms and conditions of sale Harsh Environment Program Any Measurement Computing product that is damaged due to misuse or any reason may be eligible for replacement with the same or similar device for 50 of the current list price I O boards face som
7. and 146 25 mV not calibrated The 146 25 mV range is used for open thermocouple detection The device has an integrated cold junction compensation CJC sensor for thermocouple measurements An open thermocouple detection feature lets you detect a broken thermocouple The USB 2001 TC is a standalone plug and play module which draws power from the USB cable No external power supply is required The USB 2001 TC ships with DAQFlex software All configurable options are software programmable The device is fully software calibrated Figure 1 USB 2001 TC USB 2001 TC User s Guide Introducing the USB 2001 TC Functional block diagram USB 2001 TC functions are illustrated in the block diagram shown here 30 V USB connector Isolation PC Barrier Full speed USB 2 0 20 bit ADC I O USB 2 0 Isolator Microcontroller Temperature sensor CJC Low pass filter TC input Figure 2 USB 2001 TC functional block diagram Chapter 2 Installing the USB 2001 TC What comes with your USB 2001 TC shipment As you unpack your USB 2001 TC verify that the following components are included Hardware USB 2001 TC Documentation DAQFlex TempVIEW Quick Start The DAQFlex TempVIEW quick start shows you how to use the USB 2001 TC with the TempVIEW out of the box sample program to quickly measure and display temperature measurements DAQFlex Insert The DAQFlex insert lists the in
8. e harsh environments some harsher than the boards are designed to withstand Contact MCC to determine your product s eligibility for this program 30 Day Money Back Guarantee Any Measurement Computing Corporation product may be returned within 30 days of purchase for a full refund of the price paid for the product being returned If you are not satisfied or chose the wrong product by mistake you do not have to keep it These warranties are in lieu of all other warranties expressed or implied including any implied warranty of merchantability or fitness for a particular application The remedies provided herein are the buyer s sole and exclusive remedies Neither Measurement Computing Corporation nor its employees shall be liable for any direct or indirect special incidental or consequential damage arising from the use of its products even if Measurement Computing Corporation has been notified in advance of the possibility of such damages Trademark and Copyright Information Measurement Computing Corporation InstaCal Universal Library and the Measurement Computing logo are either trademarks or registered trademarks of Measurement Computing Corporation Refer to the Copyrights amp Trademarks section on mccdag com legal for more information about Measurement Computing trademarks Other product and company names mentioned herein are trademarks or trade names of their respective companies 2012 Measurement Computing Corporation All rig
9. f the STATUS value is BUSY or ERROR A value of BUSY indicates that no new data is available In this condition the same temperature value as previously read is returned until the STATUS value changes to READY 10 USB 2001 TC User s Guide Functional Details Thermocouple measurement accuracy Cold junction temperature measurement accuracy Heat from other nearby heat sources can cause errors in thermocouple measurements by heating up the terminals so that they are at a different temperature than the cold junction compensation sensor used to measure the cold junction Minimizing thermal gradients Thermocouple wire can be a significant source of thermal gradients if it conducts heat or cold directly to terminal junctions To minimize these errors follow these guidelines Use small gauge thermocouple wire Smaller wire transfers less heat to or from the measuring junction Avoid running thermocouple wires near hot or cold objects Increasing the thermocouple length If you need to increase the length of your thermocouple use wires made of the same conductive material to minimize the error introduced by thermal EMFs Data linearization To convert data acquired from the USB 2001 TC to temperature values the following calculations need to be performed A D calibration CJC correction Thermocouple linearization These calculations are performed by the DAQFlex API Refer to the DAQFlex API source code for an exa
10. hts reserved No part of this publication may be reproduced stored in a retrieval system or transmitted in any form by any means electronic mechanical by photocopying recording or otherwise without the prior written permission of Measurement Computing Corporation Notice Measurement Computing Corporation does not authorize any Measurement Computing Corporation product for use in life support systems and or devices without prior written consent from Measurement Computing Corporation Life support devices systems are devices or systems that a are intended for surgical implantation into the body or b support or sustain life and whose failure to perform can be reasonably expected to result in injury Measurement Computing Corporation products are not designed with the components required and are not subject to the testing required to ensure a level of reliability suitable for the treatment and diagnosis of people HM USB 2001 TC docx Table of Contents Preface ABOUT this USER S GUE A aa 4 What you will learn OLAS User Mesa 4 Conventions an this USES UE A A el ans mana ete 4 Where to ind More MORA OL OS 4 Chapter 1 Introducina the USB 2001 TG oran ii ri 5 Functional Block dia sraM ais da dada 6 Chapter 2 INStaling Ihe USB 2001T6 0 A A Guten 7 What comes with your USB 2001 TC shipment cd 7 HardWare ais 7 A caro aee aaa E E AE EE O AE cn vaes acessuen AEO TAE T 7 Unpackine the USB 2001 TC Iean iia f Trista line Ge SOM WA
11. mple of how to perform these calculations Mechanical drawings wit ere 38 10 mm COMPUTING Nonon MA 027 1 5 in 62 56 mm 2 463 in 20 32 mm E E Figure 7 USB 2001 TC dimensions 11 Chapter 4 Specifications All specifications are subject to change without notice Typical for 25 C unless otherwise specified Caution Electromagnetic interference can adversely affect the measurement accuracy of this product The input terminals of this device are not protected for electromagnetic interference As a result this device may experience reduced measurement accuracy or other temporary performance degradation when connected cables are routed in an environment with radiated or conducted radio frequency electromagnetic interference To limit radiated emissions and to ensure that this device functions within specifications in its operational electromagnetic environment take precautions when designing selecting and installing measurement probes and cables Analog input Table 1 Input characteristics Number of channels ADC resolution Input ranges 73 125 mV calibrated 146 25 mV not calibrated Used for open thermocouple detection Channe to USB ground Common mode rejection ratio Channel to USB ground gt 145 dB 0 to 60 Hz Noise rejection 50 60 Hz gt 80 dB ETE Differential input impedance 20 MA between isolated 33 V and ground E O E Open thermocouple bas voltage evo o ooo Cold ju
12. nction compensation 0 to 65 C 1 25 C maximum 0 6 C typical sensor accuracy Cold junction compensation 0 0625 C typical sensor resolution Overvoltage protection Channel configurations Table 2 Channel configuration specifications Sensor category Specification Temperature measurement Works over temperature ranges defined by NIST J ranges K R S T N E and B thermocouple types The E type has a maximum limit of 900 C 30 V max between TC and TC Thermocouple Note 2 J K S R B E T or N One differential channel Note 1 Channel configuration information is stored in internal FLASH Program Memory on the microcontroller by the firmware whenever any item is modified Modification is performed by commands issued over USB from an external application and the configuration is non volatile Note 2 The factory default configuration is undefined 12 USB 2001 TC User s Guide Specifications Compatible thermocouples Table 3 Compatible sensor type specifications Parameter Specification Thermocouple type J 210 C to 1200 C 270 C to 1372 C 50 C to 1768 C 50 C to 1768 C 270 C to 400 C 270 C to 1300 C 270 C to 900 C 0 C to 1820 C Temperature accuracy The following graphs show the errors for each thermocouple type when connected to the USB 2001 TC The graphs display the maximum errors at 25 C and over the full operating tem
13. perature range and account for cold junction compensation errors The graphs were generated using thermocouples connected to subminiature connectors of the same type The CJC sensor resolution is 0 0625 C This is the minimum value of the CJC step width As such the reading may result in a saw tooth curve rather than a square curve as the temperature inside the board changes This is the expected behavior 13 USB 2001 TC User s Guide Specifications Temperature Error C Temperature Error C Temperature Error C 6 Max Over Operating Temp Max at 25 C 4 2 0 500 0 500 1x103 1 5x103 Measured Temperature C Temperature error of J type thermocouple 6 Max Over Operating Temp Max at 25 C 4 2 0 500 0 500 1x103 1 5x108 Measured Temperature C Temperature error of K type thermocouple Max Over Operating Temp Max at 25 C 500 0 500 1x103 1 5x103 2x103 Measured Temperature C Temperature error of R type thermocouple 14 USB 2001 TC User s Guide Specifications Max Over Operating Temp Max at 25 C 45 AAA a S uw 10 pao D Q o 2 5 0 500 0 500 1x103 1 5x103 2x103 Measured Temperature C Temperature error of S type thermocouple Max Over Operating Temp Max at 25 C Temperature Error C 500 0 500 1x108 1 5x103 Measured Temperature C Temperatu
14. re error of N type thermocouple Max Over Operating Temp Max at 25 C Temperature Error C 0 500 1x103 1 5x103 2x103 Measured Temperature C Temperature error of B type thermocouple 15 USB 2001 TC User s Guide Specifications Max Over Operating Temp Max at 25 C Temperature Error C 400 200 0 200 400 Measured Temperature C Temperature error of T type thermocouple Max Over Operating Temp Max at 25 C Temperature Error C 500 0 500 1x103 Measured Temperature C Temperature error of E type thermocouple LED indicator Table 4 LED behavior Steady green ort Power Table 5 Power specifications Parameter Specification Current consumption from USB 150 mA maximum 100 mA typical Suspend current Recommended warm up time 16 USB 2001 TC User s Guide Specifications Safety voltages Connect only voltages that are within these limits Table 6 Safety voltage specifications Channel to earth ground 30 V maximum Note 3 Note 3 Measurement Category I is for measurements performed on circuits not directly connected to the electrical distribution system referred to as MAINS voltage MAINS is a hazardous live electrical supply system that powers equipment This category is for measurements of voltages from specially protected secondary circuits Such voltage measurements include signal levels special equipment limi
15. sions Group 1 Class A Immunity EN 61326 2 1 2006 Particular requirements for sensitive test and measurement equipment for EMC unprotected applications EC 61000 4 2 2001 Electrostatic Discharge immunity EC 61000 4 3 2002 Radiated Electromagnetic Field immunity EC 61000 4 4 2004 Electric Fast Transient Burst Immunity EC 61000 4 5 2001 Surge Immunity IEC 61000 4 6 2003 Radio Frequency Common Mode Immunity IEC 61000 4 11 2004 Voltage Interrupts To maintain compliance to the standards of this declaration the following conditions must be met The host computer peripheral equipment power sources and expansion hardware must be CE compliant m All I O cables must be shielded with the shields connected to ground O cables must be less than 3 meters 9 75 feet in length The host computer must be properly grounded Declaration of Conformity based on tests conducted by National Instruments Corporation Austin TX 78759 3504 USA in November 2009 We hereby declare that the equipment specified conforms to the above Directives and Standards Leg Carl Haapaoja Director of Quality Assurance Measurement Computing Corporation 10 Commerce Way Suite 1008 Norton Massachusetts 02766 508 946 5100 Fax 508 946 9500 E mail info mccdag com www mccdaq com
16. ted energy parts of equipment circuits powered by regulated low voltage sources and electronics Bus interface Table 7 Bus specifications USB specification USB 2 0 Full Speed Device compatibility USB 1 1 USB 2 0 Mechanical Table 8 Mechanical specifications Dimensions 62 56 mm L x 38 10 mm W x 20 32 mm H 2 46 in L x 1 50 in W x 0 80 in H Cable Length 2 meters 6 5 feet Approximately 1168 4102 Environment Table 9 Environmental specifications Operating temperature range 0Oto55 C Storage temperature range 40 to 85 C Operating humidity 10 to 90 non condensing Storage humidity 5 to 95 RH noncondensing 2 000 m at 25 C ambient temperature Pollution degree Note 4 The USB 2001 TC is intended for indoor use only 17 CE Declaration of Conformity Manufacturer Measurement Computing Corporation Address 10 Commerce Way Suite 1008 Norton MA 02766 USA Category Electrical equipment for measurement control and laboratory use Measurement Computing Corporation declares under sole responsibility that the product USB 2001 TC to which this declaration relates is in conformity with the relevant provisions of the following standards or other documents EC EMC Directive 2004 108 EC General Requirements EN 61326 1 2006 IEC 61326 1 2005 Emissions EN 55011 2007 CISPR 11 2003 Radiated emissions Group 1 Class A EN 55011 2007 CISPR 11 2003 Conducted emis
17. ternet location where you can download DAQFlex software documentation and firmware loader utility and the location where you can learn more about DAQFlex software Unpacking the USB 2001 TC As with any electronic device you should take care while handling to avoid damage from static electricity Before removing the USB 2001 TC from its packaging ground yourself using a wrist strap or touch either the computer chassis or other grounded object to eliminate any stored static charge If any components are missing or damaged notify Measurement Computing Corporation immediately by phone fax or e mail Phone 508 946 5100 and follow the instructions for reaching Tech Support Fax 508 946 9500 to the attention of Tech Support Email techsupport mccdag com Installing the software The USB 2001 TC is supported by DAQFlex software Install DAQFlex software to develop data acquisition applications that can be deployed across multiple operating systems and custom embedded systems DAQFlex software for each supported operating system is available from the DAQFlex download page at www mecdag com DAQFlexDL Refer to the DAQFlex Software User s Guide at www imecdaq com pdfs manuals DAQFlex 20Software pdf for instructions about how to install DAQFlex software Installing the hardware Install the software before you install your device A driver needed to run the USB 2001 TC is installed when you install the software Therefore you need to
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