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WARRANTY/DISCLAIMER

OMEGA ENGINEERING, INC. warrants this unit to be free of defects in materials and 

workmanship for a period of 

13 months

 from date of purchase. OMEGA’s WARRANTY adds an 

additional one (1) month grace period to the normal 

one (1) year product warranty

 to cover 

handling and shipping time. This ensures that OMEGA’s customers receive maximum coverage 

on each product.

If the unit malfunctions, it must be returned to the factory for evaluation. OMEGA’s Customer 

Service Department will issue an Authorized Return (AR) number immediately upon phone 

or written request. Upon examination by OMEGA, if the unit is found to be defective, it 

will be repaired or replaced at no charge. OMEGA’s WARRANTY does not apply to defects 

resulting from any action of the purchaser, including but not limited to mishandling, improper 

interfacing, operation outside of design limits, improper repair, or unauthorized modification. 

This WARRANTY is VOID if the unit shows evidence of having been tampered with or shows 

evidence of having been damaged as a result of excessive corrosion; or current, heat, moisture 

or vibration; improper specification; misapplication; misuse or other operating conditions 

outside of OMEGA’s control. Components in which wear is not warranted, include but are not 

limited to contact points, fuses, and triacs.

OMEGA is pleased to offer suggestions on the use of its various products. However,  

OMEGA neither assumes responsibility for any omissions or errors nor assumes 

liability for any damages that result from the use of its products in accordance with 

information provided by OMEGA, either verbal or written. OMEGA warrants only 

that the parts manufactured by the company will be as specified and free of defects. 

OMEGA MAKES NO OTHER WARRANTIES OR REPRESENTATIONS OF ANY KIND 

WHATSOEVER, EXPRESSED OR IMPLIED, EXCEPT THAT OF TITLE, AND ALL IMPLIED 

WARRANTIES INCLUDING ANY WARRANTY OF MERCHANTABILITY AND FITNESS 

FOR A PARTICULAR PURPOSE ARE HEREBY DISCLAIMED. LIMITATION OF LIABILITY: 

The remedies of purchaser set forth herein are exclusive, and the total liability of 

OMEGA with respect to this order, whether based on contract, warranty, negligence, 

indemnification, strict liability or otherwise, shall not exceed the purchase price of 

the component upon which liability is based. In no event shall OMEGA be liable for 

consequential, incidental or special damages.

CONDITIONS:  Equipment sold by OMEGA is not intended to be used, nor shall it be used: (1) as 

a “Basic Component” under 10 CFR 21 (NRC), used in or with any nuclear installation or activity; 

or (2) in medical applications or used on humans. Should any Product(s) be used in or with any 

nuclear installation or activity, medical application, used on humans, or misused in any way, 

OMEGA assumes no responsibility as set forth in our basic WARRANTY / DISCLAIMER language, 

and, additionally, purchaser will indemnify OMEGA and hold OMEGA harmless from any 

liability or damage whatsoever arising out of the use of the Product(s) in such a manner.

RETURN REQUESTS/INQUIRIES

Direct all warranty and repair requests/inquiries to the OMEGA Customer Service Department. 

BEFORE RETURNING ANY PRODUCT(S) TO OMEGA, PURCHASER MUST OBTAIN AN 

AUTHORIZED RETURN (AR) NUMBER FROM OMEGA’S CUSTOMER SERVICE DEPARTMENT (IN 

ORDER TO AVOID PROCESSING DELAYS). The assigned AR number should then be marked on 

the outside of the return package and on any correspondence.

The purchaser is responsible for shipping charges, freight, insurance and proper packaging to 

prevent breakage in transit.  

OMEGA’s policy is to make running changes, not model changes, whenever an improvement is possible.  

This affords our customers the latest in technology and engineering.
OMEGA is a registered trademark of OMEGA ENGINEERING, INC.
© Copyright 2016 OMEGA ENGINEERING, INC. All rights reserved. This document may not be copied, photocopied, 

reproduced, translated, or reduced to any electronic medium or machine-readable form, in whole or in part, without 

the prior written consent of OMEGA ENGINEERING, INC.

FOR 

WARRANTY

 RETURNS, please have the 

following information available BEFORE  

contacting OMEGA:
1. Purchase Order number under which  

  the product was PURCHASED,
2.  Model and serial number of the product 

under warranty, and

3.  Repair instructions and/or specific  

problems relative to the product.

FOR 

NON-WARRANTY

 REPAIRS, consult 

OMEGA for current repair charges. Have the 

following information available BEFORE  

contacting OMEGA:
1.  Purchase Order number to cover the  

COST of the repair,

2. Model and serial number of theproduct, and
3. Repair instructions and/or specific problems  

  relative to the product.

Summary of Contents for OMB-DAQ-TC-RACK

Page 1: ...e mail info omega com For latest product manuals www omegamanual info OMB DAQ TC RACK 32 Channel USB Ethernet Based Thermocouple Input Data Acquisition System Shop online at omega comSM User sGuide...

Page 2: ...SA Canada only Engineering Service 1 800 872 9436 USA Canada only Tel 203 359 1660 Fax 203 359 7700 e mail info omega com For Other Locations Visit omega com worldwide omega com info omega com The inf...

Page 3: ...the OMB DAQ TC RACK for communication across networks 10 Calibrating the hardware 10 Factory calibration 10 Field calibration 10 Restoring factory default network settings 10 Chapter 3 Functional Det...

Page 4: ...4 Power 23 USB 24 Network 24 Ethernet connection 24 Network interface 24 Network factory default settings 25 Network security 25 LED displays and the factory reset button 25 Environment 25 Mechanical...

Page 5: ...ation 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 bo...

Page 6: ...ector USB 2 0 or 10 100 Ethernet interface Powered by the included 5 V external power adapter OMB DAQ TC RACK PS Ethernet interface The OMB DAQ TC RACK has a built in 10 100 BASE T auto negotiation hi...

Page 7: ...MB DAQ TC RACK User s Guide Introducing the OMB DAQ TC RACK 7 Functional block diagram Device functions are illustrated in the block diagram shown here Figure 1 OMB DAQ TC RACK functional block diagra...

Page 8: ...provided to a to a USB port on a computer running Windows Windows finds and installs the device driver automatically and notifies you that the device is ready to use Installing on Ethernet The OMB DAQ...

Page 9: ...ortly after it is powered up and attached to the network Link Local Only The OMB DAQ TC RACK is assigned a link local IP address by the Windows PC or other host that supports link local addressing A l...

Page 10: ...on The Omega Engineering Manufacturing Test department performs the initial factory calibration Return the device to Omega Engineering when calibration is required The recommended calibration interval...

Page 11: ...nnector Figure 3 OMB DAQ TC RACK rear panel components USB connector The USB connector provides USB communication Ethernet connector The OMB DAQ TC RACK has one 10 100 BASE T auto negotiation high spe...

Page 12: ...e voltage is calculated as follows 11 4 V 10 V 8 6 V 3 10 V Each TC channel becomes biased to the average common mode voltage of 10 V Each common mode voltage must then be within the 10 V 1 4 V limits...

Page 13: ...cause an error voltage to develop across the lead resistance of the TC that is indistinguishable from the thermocouple voltage you are measuring You can estimate this error voltage with the following...

Page 14: ...an also use the alarm outputs to control a device or application that indicates when a temperature threshold has been exceeded When its pull up is disabled a DO bit can be used to control a device nee...

Page 15: ...output line can be used for normal operation Alarm enabled active low output output line goes low when alarm condition is met Alarm enabled active high output output line goes high when alarm conditi...

Page 16: ...arately for applications that need additional analog thermocouple input and digital I O channels A 40 pin expansion cable is included with the OMB DAQ TC RACK EXP32 Chassis ground connector Provides a...

Page 17: ...OMB DAQ TC RACK User s Guide Functional Details 17 Mechanical drawings Figure 8 Enclosure dimensions front Figure 9 Enclosure dimensions rear...

Page 18: ...OMB DAQ TC RACK User s Guide Functional Details 18 Figure 10 Enclosure dimensions side Figure 11 Circuit board dimensions...

Page 19: ...nput current Open thermocouple detect disabled 2 nA Open thermocouple detect enabled 75 nA Common mode rejection 50 Hz filtering at DC and fin 50 Hz 110 dB 60 Hz filtering at DC and fin 60 Hz 110 dB N...

Page 20: ...d CMVaverage 1 4 V Note 3 Measurement sensitivity is the smallest change in temperature that can be detected Channel configuration Table 2 Channel configuration specification Sensor Category Condition...

Page 21: ...1 254 700 0 937 0 424 1 136 0 520 1820 0 610 0 300 1 056 0 467 E 200 1 754 0 811 1 933 0 880 0 0 775 0 355 0 806 0 369 1000 0 657 0 323 0 989 0 437 T 200 2 005 0 923 2 207 1 005 0 0 836 0 382 0 874 0...

Page 22: ...e 1 5 V max 0 6 V min Schmitt trigger hysteresis 0 4 V min 1 2 V max Table 6 Digital output specifications Parameter Specification Number of outputs 32 channels shared with alarms Configuration Open d...

Page 23: ...t output line goes high when alarm condition is met Enabled active low output output line goes low when alarm condition is met Alarm output may be latched and will not clear unless explicitly cleared...

Page 24: ...Self powered no USB current consumed Network Ethernet connection Table 12 Ethernet connection specifications Parameter Specification Ethernet type 100 Base TX 10 Base T Communication rates 10 100 Mbps...

Page 25: ...fication POWER LED top Indicates power on Blinks when blink command is sent Both the POWER and ACTIVITY LEDs blink in firmware upgrade mode ACTIVITY LED On when there is a valid connection and blinks...

Page 26: ...r input J4 TC3 CH3 sensor input J20 TC19 CH19 sensor input TC3 CH3 sensor input TC19 CH19 sensor input J5 TC4 CH4 sensor input J21 TC20 CH20 sensor input TC4 CH4 sensor input TC20 CH20 sensor input J6...

Page 27: ...29 35 DOUT30 Digital Output 30 Alarm Output 30 36 DOUT31 Digital Output 31 Alarm Output 31 37 IGND Isolated Digital GND 38 IGND Isolated Digital GND 39 IGND Isolated Digital GND 40 IGND Isolated Digi...

Page 28: ...therwise shall not exceed the purchase price of the component upon which liability is based In no event shall OMEGA be liable for consequential incidental or special damages CONDITIONS Equipment sold...

Page 29: ...bine Paddlewheel Systems M U Totalizers Batch Controllers pH CONDUCTIVITY M U pH Electrodes Testers Accessories M U Benchtop Laboratory Meters M U Controllers Calibrators Simulators Pumps M U Industri...

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