Manual de instrucciones Omega Engineering OM-DAQ-USB-2401

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  • Omega Engineering OM-DAQ-USB-2401 - page 1

    OM-DAQ-USB-2401 Multiple Channel USB Data Acquisition Module e-mail: info@omega.com For latest product manuals: omegamanual.info Shop online at omega.com ® U ser ’ s Guide ® ...

  • Omega Engineering OM-DAQ-USB-2401 - page 2

    Servicing Nor th America: U.S.A.: Omega Engineering, Inc., One Omega Drive, P.O. Box 4047 ISO 9001 Certified Stamford, CT 06907-0047 USA Toll Free: 1-800-826-6342 TEL: (203) 359-1660 FAX: (203) 359-7700 e-mail: info@omega.com Canada: 976 Bergar Laval (Quebec), H7L 5A1 Canada Toll-Free: 1-800-826-6342 TEL: (514) 856-6928 FAX: (514) 856-6886 e-mail: ...

  • Omega Engineering OM-DAQ-USB-2401 - page 3

    i OM-DAQ-USB-2400 Multiple Channel USB Data Acquisition Module TABLE OF CONTENTS Page Section 1 - Introduction ....................................................................... 1-1 1.1 Precautions ................................................................................................ 1-1 1.2 Safety W arnings and IEC Symbols ......... ...

  • Omega Engineering OM-DAQ-USB-2401 - page 4

    ii OM-DAQ-USB-2400 Multiple Channel USB Data Acquisition Module TABLE OF CONTENTS Page 5.4 T riggering ................................................................................................... 5-4 5.5 Signal Modes ............................................................................................. 5-4 5.6 System Noise ........... ...

  • Omega Engineering OM-DAQ-USB-2401 - page 5

    iii List of Figures Section Figure Description .............................................................. Page Section 1 1-1 IEC Symbols ............................................................... 1-2 1-2 System Components ................................................. 1-3 Section 3 3- 1 OM-DAQ-USB-2401 Hardware and Dimensions ... 3- 1 3 ...

  • Omega Engineering OM-DAQ-USB-2401 - page 6

    iv List of Figures Section Figure Description ............................................................. Page 4-25 OM-DAQ-USB-2400 Block Diagram .................... 4-14 4- 26 OM-DAQ-USB-2401 Single-ended and Differ ential Conections to Analog Input Channels Diagram ... 4-1 6 4-27 Calibration/Scan Arrangement ............................ 4-17 4 ...

  • Omega Engineering OM-DAQ-USB-2401 - page 7

    Section 1 - Intr oduction Please read this manual completely befor e installing and operating your Omega data acquisition system. It’s important to read and follow all notes, cautions, warnings and safety precautions befor e operating this device. “Device” refers to your data acquisition unit. 1.1 Precautions • This device is not designed f ...

  • Omega Engineering OM-DAQ-USB-2401 - page 8

    When using OM-DAQ-USB-2401 unit to acquire data, computer energy save modes can cause false data readings. Prior to using the unit, ensure your computer’ s energy save mode is disabled. If needed, consult your PC user’ s manual to disable energy save (power suspension) modes. 1.2 Safety W arnings and IEC Symbols This device is marked with inter ...

  • Omega Engineering OM-DAQ-USB-2401 - page 9

    *At highest scan rate, 1000 samples/sec +/- 1% with one channel on, +/- 5% with all channels on. The main items you will be using in your data acquisition system are the OM-DAQ-USB-2401 unit, its USB cable, and power adaptor . Figure 1-2. System Components Introduction 1 1-3 NOTE: USB POWER ADAPTER (OPTIONAL) OM-DAQ-USB-2401 MODULE PC WITH USB CONN ...

  • Omega Engineering OM-DAQ-USB-2401 - page 10

    Section 2 - Hardware It is important that you read this manual completely and follow all safety precautions befor e operating this instrument. 2.1 Package Inspection Remove the packing list and verify that you have received all your equipment. If you have any questions about the shipment, please call our Customer Service Department at 1-800-622-237 ...

  • Omega Engineering OM-DAQ-USB-2401 - page 11

    Section 3 - Hardware Setup 3.1 OM-DAQ-USB-2401 System Components Figure 3-1. OM-DAQ-USB-2401 Hardware and Dimensions The external power por t is used in applications which have USB hubs that are not self-powered. See the next section for more information. The 'ST A TUS LED' blinking at Scan Rate means an acquisition is in progress. At a f ...

  • Omega Engineering OM-DAQ-USB-2401 - page 12

    3.2.1 USB-powered Hubs These hubs draw all power from the host USB connector ’s power pins. The power is used for hub internal functions and for the hub’s ports. Each port of a USB-powered hub must be capable of supplying at least 100 mA. 3.2.2 Self-powered Hubs These hubs draw power from a sour ce other than the host USB connector , with excep ...

  • Omega Engineering OM-DAQ-USB-2401 - page 13

    3.3 Connecting Y our OM-DAQ-USB-2401 Acquisition System to PC When using a power adaptor with your DAQ system, be sure to supply power (from the adaptor to the DAQ) before connecting the USB cable. This allows your DAQ to inform the host computer (upon connection of the USB cable) that the unit requires minimal power from the computer . Use an appr ...

  • Omega Engineering OM-DAQ-USB-2401 - page 14

    3.4 Connecting V arious Hardware Setups ON-DAQ-USB-2401 data acquisition systems range from simple to complex. One example of a simple system is that of one OM-DAQ-USB-2401 connected to a PC’s USB connector . A much more complex system is one that contains 10 OM- DAQ-USB-2401 units and a combination of USB-powered and self-power ed hubs. Despite ...

  • Omega Engineering OM-DAQ-USB-2401 - page 15

    3.4.2 Connection to USB-powered Hub In this example, two OM-DAQ-USB-2401s are connected by cable to individual ports of a single USB-powered hub. Since the hub r eceives all its power from the computer ’s USB, the hub cannot supply adequate power to the DAQ units. Because of this aspect of insufficient power , each unit is connected to its own po ...

  • Omega Engineering OM-DAQ-USB-2401 - page 16

    Figure 3-5. Connections to Self-Powered Hub and to USB-Powered Hub USB port locations var y from PC to PC. 3.5 OM-DAQ-USB-2401 Mounting The OM-DAQ-USB-2401 mounting kit contains the following accessories: • 2 mounting brackets (to be used for either wall or DIN rail) • 4 long screws (to be used for either wall or DIN rail) • 4 short screws (t ...

  • Omega Engineering OM-DAQ-USB-2401 - page 17

    3.5.1 OM-DAQ-USB-2401 W all Mounting In order to mount the OM-DAQ-USB-2401 to the wall, you will need to: 1. Remove the rear scr ews from the OM-DAQ-USB-2401. 2. Align the mounting brackets with the rear holes on the DAQ unit (make sur e that the ears are facing outwar ds, like in the figure below). 3. Use the longer screws to r econnect the mounti ...

  • Omega Engineering OM-DAQ-USB-2401 - page 18

    Hardware Setup 3 3-8 3.5.2 OM-DAQ-USB-2401 DIN Rail Mounting In order to mount the OM-DAQ-USB-2401 to a DIN-Rail, you will need to: 1. Attach the DIN-rail plastic adaptors to the mounting brackets, using the four shorter screws. 2. Remove the rear scr ews from the OM-DAQ-USB-2401. 3. Align the mounting brackets with the rear holes on the DAQ unit ( ...

  • Omega Engineering OM-DAQ-USB-2401 - page 19

    4-1 Software 4 Section 4 - Software 4.1 Getting Started The following program files ar e included on the Omega DAQ Central User Software CD supplied with your data acquisition unit. These files can also be downloaded from the omega.com website should you misplace your CD. • DAQ Central data logging software installer • Omega.DAQ .NET API When u ...

  • Omega Engineering OM-DAQ-USB-2401 - page 20

    Software 4 4-2 4.2.2 Software Setup Insert the DAQ Central Software CD that was included with your DAQ unit into the CD-ROM drive on your PC. Y our system should begin the installation process automatically . If the software installation does not start automatically: open: "My Computer", double-click your CD-ROM drive, and run "setup ...

  • Omega Engineering OM-DAQ-USB-2401 - page 21

    Software 4 4-3 Figure 4-3. Confirm Installation Screen The setup wizard now has all the information to complete the installation of the software on your PC. T o continue with installing the program click the “Next >” button. During the install process, a W indows Command Prompt may pop up. No interaction is requir ed in this window; it is au ...

  • Omega Engineering OM-DAQ-USB-2401 - page 22

    Software 4 4-4 4.3 DAQ Central Software Operation Below is the basic flow of operation when using the software: 1. Highlight desired device. 2. Open Device Configuration window . 3. Set channels, sample rate, triggering, and data output file. 4. Click “OK” to confirm Device Configuration. 5. Open any desired Data Displays. 6. Click the Start bu ...

  • Omega Engineering OM-DAQ-USB-2401 - page 23

    TOOLBAR BUTTONS Start Button Initiates data acquisition for the highlighted device. Even if a Start T rigger is set, this must be pressed to Arm the device. Stop Button Stops data acquisition for the highlighted device. If a Stop T rigger is set, this will cancel the trigger . Device Accesses the Device Configuration Configuration window for the se ...

  • Omega Engineering OM-DAQ-USB-2401 - page 24

    4.3.1 Main Control W indow Pull-Down Operations Below are the operations that ar e available in the Pull-Down Menus of the DAQ Central Main Control W indow . Figure 4-5. File Menu Open Configuration Opens Device Configuration settings from a saved file Save Configuration As Sa ves curr ent Dev ice Con fig ur ation settings to a new file name These ...

  • Omega Engineering OM-DAQ-USB-2401 - page 25

    Figure 4-7. Tools Menu Export Data File – T o conver t data file from binar y file to .csv file Fgure 4-8. Help Menu Check for Updates T o check for the latest Omega DAQ Central software update information through the Internet connection. About T o view software version. Software 4 4-7 ...

  • Omega Engineering OM-DAQ-USB-2401 - page 26

    Section 4.3.2 Device Configuration The Device Configuration window contains the Channel, T riggers, and Data tabs. Details for these tabs are below . When finished making changes, press “OK” to confirm the changes or “Cancel” to abandon the changes. Figure 4-9. Configuration Mode - Channels Tab Screen Channels T ab The Channels tab contains ...

  • Omega Engineering OM-DAQ-USB-2401 - page 27

    Configuration Parameter Settings Channel The input channel’ s name (not editable) AN1D = analog channel 1, differential input AN1H = analog channel 1, single-ended high input AN1L = analog channel 1, single-ended low input Etc. Nickname Y ou can specify the Nickname (e.g., Oven 1, Monitor Room) Units Y ou can specify the Engineering Unit. When sw ...

  • Omega Engineering OM-DAQ-USB-2401 - page 28

    Figure 4-13. Trigger Options The T riggers tab is used to set up triggers for starting and stopping data acquisition. The Start T rigger and the Stop T rigger each have a differ ent set of available trigger types: Figure 4-14. "Start Trigger" Options Figure 4-15. "Stop Trigger" Options T rigger T ypes Manual Acquisition is manua ...

  • Omega Engineering OM-DAQ-USB-2401 - page 29

    For all Start T rigger types, the device must be armed by pushing the Star t Button on the main window . Data storage and display will not begin until the device triggers. Data T ab Figure 4-16. Data Tab T o save data to a file on the PC, select the Data tab and choose a filename. This data can be saved in Binary or Delimited (.csv) format. • Bin ...

  • Omega Engineering OM-DAQ-USB-2401 - page 30

    Software 4 4-12 Figure 4-18. Main Window Screen Figure 4-19. Gauges Screen Figure 4-20. Bars Screen Figure 4-21. Digital Screen Figure 4-22. Table Screen ...

  • Omega Engineering OM-DAQ-USB-2401 - page 31

    Figure 4-23. Waveform Screen Each Data Display can be customized by clicking the Options Icon . Each Data Display's Options screen lets you choose which device channels to display in that window . Channels can be added or removed with the Add Display and Delete Display buttons. Confirm changes by clicking the OK button. Start Acquistion by cli ...

  • Omega Engineering OM-DAQ-USB-2401 - page 32

    Software 4 4-14 4.4 Power Line Rejection The OM-DAQ-USB-2401 Series can take readings while making use of 50/60Hz line cycle rejection. While in the line cycle r ejection mode, the maximum sample rate is as follows: • 50 Hz rejection: Scan Rate (SR) Range: 0.153Hz < SR <= 1Hz • 60 Hz rejection: Scan Rate (SR) Range: 1Hz < SR <= 1.66 ...

  • Omega Engineering OM-DAQ-USB-2401 - page 33

    The converter is comprised of a 4th-order , delta-sigma ( Δ∑ ) analog-to-digital (A/D) converter modulator followed by a programmable digital filter . A flexible input multiplexer handles differ ential or single-ended signals; the programmable filter allows the user to optimize between a resolution of up to 23 bits noise-fr ee. Examples of scan ...

  • Omega Engineering OM-DAQ-USB-2401 - page 34

    In DAQ applications, thermocouples should not be connected single-ended. Doing so can result in noise and false readings. This is especially true when acquiring other high-amplitude signals in conjunction with thermocouple signals that are connected single-ended. The DAQ units include built-in cold-junction compensation (CJC), which is automaticall ...

  • Omega Engineering OM-DAQ-USB-2401 - page 35

    Resolution (Effective Number of Bits - ENOB, RMS) – The number of r eliable data bits that exist for a signal’s measurement. The gr eater the resolution, the more detailed the r eading. For example, with an increased r esolution, a reading of 5.12 V could become 5.1 1896 V . The DAQ actually provides for 24 bits of data information; however , t ...

  • Omega Engineering OM-DAQ-USB-2401 - page 36

    4.11 Thermocouple Measurements The OM-DAQ-USB-2401 provides ef fortless thermocouple (TC) measurements. The unit includes built-in cold-junction compensation (CJC), which is automatically invoked when you select TC measurements. The DAQ unit automatically converts acquired voltage r eadings into compensated-linearized temperature r eadings. A DAQ s ...

  • Omega Engineering OM-DAQ-USB-2401 - page 37

    Section 5 – Signal Management 5.1 Channel Control and Expansion In the OM-DAQ-USB-2401 system, the quantities and types of DAQ units used determine the system’s channel capacity . Up to 10 OM-DAQ-USB-2401s can be used with one host PC. See the Specifications for more detailed channel information. 5.2 Scan Time and Resolution 5.2.1 Scan T ime Sc ...

  • Omega Engineering OM-DAQ-USB-2401 - page 38

    Scan Rate vs. Resolution 2 Resolution Scan Rate 3,4 (Scans (ENOB 5 Speed Designation Scan Time 1 (s) per Second - SPS) RMS) V er y Slow , 50 / 60 Hz rejection 3600s>=ST >= 6.5s 0.0002778=< SR <= 22.5 0.153 Slow , 50 Hz rejection 6.5s> ST >= 1s 0.153 < SR <=1 21 Slow , 60 Hz rejection 1s> ST >=0.6s 1 < SR <= 1.67 ...

  • Omega Engineering OM-DAQ-USB-2401 - page 39

    The following table provides general advice r egarding the selection of Scan T ime. The concepts are further illustrated by the figur e, Examples of Under Sampling. Scan Time (Measurement Scan Rate Analog Input Signal Duration) (Sample Rate) Resolution Steady , or gradual change Long Low High Highly variable (unsteady) Short High Low Figure 5-1. Ex ...

  • Omega Engineering OM-DAQ-USB-2401 - page 40

    5.4 T riggering T riggering controls an acquisition cycle. Once the system is armed, a trigger is requir ed to collect the data. The user must determine the triggering requir ement based on the nature of the measurement and the amount of data needed to satisfy the system’s purpose. The trigger source can be a softwar e command or an analog input ...

  • Omega Engineering OM-DAQ-USB-2401 - page 41

    Differential mode r efers to a mode, or circuit set-up, in which a voltage is measured between two signal lines. The measur ed differ ential voltage is used for a single channel. An advantage of using differ ential inputs is that they reduce signal errors and the induction of noise r esulting from gr ound current. The following illustration is an e ...

  • Omega Engineering OM-DAQ-USB-2401 - page 42

    Resolution: An analog-to-digital converter (ADC) converts an analog voltage to a digital number . The digital number represents the input voltage in discr ete steps with finite resolution. ADC resolution is determined by the number of bits that repr esent the digital number . An n-bit ADC has a resolution of 1 part in 2n. Thus, 12 and 16 bit resolu ...

  • Omega Engineering OM-DAQ-USB-2401 - page 43

    5.9 Input and Source Impedance As illustrated below , the input impedance (Ri) of an analog-to-digital converter combines with the transducer ’s source impedance (Rs) forming a voltage divider . This divider distorts the voltage being read at the analog-to-digital converter . The actual voltage read is repr esented by the equation: V ADC = VT x R ...

  • Omega Engineering OM-DAQ-USB-2401 - page 44

    Section 6 - CE Conformity 6.1 OM-DAQ-USB-2401 Design for CE Conformity The OM-DAQ-USB-2401 has been designed to meet requir ements as outlined in European Community EMC Dir ective EN61326. Three ferrite cor es are included in the OM-DAQ-USB-2401 package. When powering the unit using the adapter , the ferrite cores must be attached to both the USB c ...

  • Omega Engineering OM-DAQ-USB-2401 - page 45

    Figure 6-2 Ferrite Core The ferrite cores may be r emoved from the DAQ unit; however , in order to conform to CE standards, all of the ferrite cor es must be attached to the USB cable and power adapter . If the user is not using the power adapter but relying on power from the host USB connection, no ferrites are required. CE Conformity 6 6-2 UNSNAP ...

  • Omega Engineering OM-DAQ-USB-2401 - page 46

    Section 7 – T roubleshooting 7.1 Basic Checklist Power – Check USB cable connection. The green “PWR IND” LED should be lit on the DAQ device. If using a powered USB hub, make sur e its power cable is plugged in. Signal – Check signal lines and connections. Connectors must be free of corrosion. Signal lines should be undamaged and fr ee of ...

  • Omega Engineering OM-DAQ-USB-2401 - page 47

    Section 8 – Ser vice & Calibration Y our Omega DAQ components have been built and factory calibrated to meet or exceed the specifications listed here in this manual. The following section provides information on how to have your device serviced. 8.1 Service & Calibration If any of your DAQ system components requir e service or calibration ...

  • Omega Engineering OM-DAQ-USB-2401 - page 48

    Section 9 – Specifications General Isolation: 500V from PC External Excitation Output V oltage: +12v DC Regulated, Maximum total current output 67mA Power Requirements: Powered from USB port max 500 mA, or from external 7.5 to 12 Vdc, (1.0 A recommended) Thermocouple T ypes: J, K, T , E, R, S, B, N Cold-Junction Compensation Accuracy: ±1.0°C Is ...

  • Omega Engineering OM-DAQ-USB-2401 - page 49

    Thermocouple Input Range: T ype J: -18 to 1200°C (0 to 2192°F) T ype K: -129 to 1372°C (-200 to 2502°F) T ype T : -101 to 400°C (-150 to 752°F) T ype E: -184 to 1000°C (-300 to 1832°F) T ype R: 204 to 1768°C (400 to 3214°F) T ype S: 204 to 1768°C (400 to 3214°F) T ype B: 538 to 1820°C (1000 to 3308°F) T ype N: -129 to 1300°C (-200 to ...

  • Omega Engineering OM-DAQ-USB-2401 - page 50

    T able 9-1. Thermocouple Accuracy (ºC) for OM-DAQ-USB-2401 TC T ype T emp. T ypical Fast (°C) Slow -18 1.3 3.8 J0 1 . 1 3 1200 0.9 2.5 -129 1.8 5 K0 1 . 4 3 . 9 1372 1.3 3.7 -101 1.6 4.5 T0 1 . 4 4 400 1 2.9 -184 1.2 3.4 E0 0 . 9 2 . 6 1000 0.7 1.9 204 5.2 14.8 R 700 4.6 13.1 1768 3.9 11 204 5.6 16 S 700 5.2 14.7 1768 4.6 12.8 B 538 7.9 13.7 1820 ...

  • Omega Engineering OM-DAQ-USB-2401 - page 51

    10.1 International Usage & CE Marking The OM-DAQ-USB-2401 multiple channel USB data acquisition module is CE marked and certified for use in several European countries. Please contact OMEGA for information on International Regulatory Compliance for each country . It is your (the user ’s) responsibility to insur e that these products ar e oper ...

  • Omega Engineering OM-DAQ-USB-2401 - page 52

    NOTES: 10-2 ...

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    NOTES: 10-3 ...

  • Omega Engineering OM-DAQ-USB-2401 - page 54

    NOTES: 10-4 ...

  • Omega Engineering OM-DAQ-USB-2401 - page 55

    W ARRANTY / DISCLAIMER OMEGA ENGINEERING, INC. warrants this unit to be free of defects in materials and workmanship for a period of 13 months from dat e o f pu rcha se. OMEGA ’ s W ARRANTY 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 c ...

  • Omega Engineering OM-DAQ-USB-2401 - page 56

    M5025/01 12 Where Do I Find Ever ything I Need for Pr ocess Measurement and Contr ol? OM EGA…Of Course! Shop online at omega.com SM TEMPERA TURE 䡺 ⻬ Thermocouple, RTD & Thermistor Probes, Connectors, Panels & Assemblies 䡺 ⻬ Wire: Thermocouple, RTD & Thermistor 䡺 ⻬ Calibrators & Ice Point References 䡺 ⻬ Recorders, C ...

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