Related Manuals for Omega OM-DAQ-USB-2401
Summary of Contents for Omega OM-DAQ-USB-2401
- Page 1 User’s Guide Shop online at omega.com e-mail: info@omega.com For latest product manuals: www.omega.com/en-us/ pdf-manuals OM-DAQ-USB-2401 Multiple Channel USB Data Acquisition Module...
- Page 2 One Omega Drive, Northbank Germany 75392 Irlam, Manchester M44 5BD The information contained in this document is believed to be correct, but OMEGA accepts no liability for any errors it contains and reserves the right to alter specifications without notice.
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Page 3: Table Of Contents
3.2.1 USB-powered Hubs ..............3-2 3.2.2 Self-powered Hubs ..............3-2 3.2.3 Power Adaptors ................. 3-2 3.3 Connecting Your OM-DAQ-USB-2401 Acquistition Systems To PC . 3-3 3.4 Connecting Various Hardware Setups ..........3-4 3.4.1 Direct Connection To Computer USB Port(s) ......3-4 3.4.2 Connection To USB-powered Hub .......... - Page 4 OM-DAQ-USB-2400 TABLE OF Multiple Channel USB Data Acquisition Module CONTENTS 5.4 Triggering ....................5-4 5.5 Signal Modes .................... 5-4 5.6 System Noise .................... 5-6 5.7 Averaging ....................5-6 5.8 Analog Filtering ..................5-6 5.9 Input and Source Impedance ..............5-7 5.10 Crosstalk ....................
- Page 5 IEC Symbols .............. 1-2 Section 1 System Components ..........1-3 Section 3 OM-DAQ-USB-2401 Hardware and Dimensions ... 3-1 Connection of an OM-DAQ-USB-2401 System to a Computer USB Port .......... 3-3 Direct Connection to Computer USB Port .... 3-4 Connection to USB-powered Hub ......3-5 Connection to Self-powered Hub and to USB-powered Hub ........
- Page 6 Trigger Source Diagram .......... 5-4 Noise Reduction in Differential Mode ....5-5 Example of Floating Differential Circuit ....5-5 Analog to Digital Converter ........5-7 OM-DAQ-USB-2401 With Ferrite Cores Installed .. 6-1 Section 6 Ferrite Core ..............6-2 Section 9 Table 9-1 Thermocouple Accuracy (C) for OM-DAQ-USB-2400 ..........
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Page 7: Section 1 - Introduction
Introduction Section 1 - Introduction Please read this manual completely before installing and operating your Omega data acquisition system. It’s important to read and follow all notes, cautions, warnings and safety precautions before operating this device. “Device” refers to your data acquisition unit. -
Page 8: Safety Warnings And Iec Symbols
Figure 1-1. IEC Symbols 1.3 General Description & System Components The OM-DAQ-USB-2401 is a USB 2.0 full speed thermocouple/voltage input data acquisition module (fully compatible with both USB 1.1 and USB 2.0 ports). This stand-alone module draws power from the USB port to operate. An external (optional) power supply can be used. -
Page 9: System Components
*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. POWER ADAPTER... -
Page 10: Section 2 - Hardware
If you have any questions about the shipment, please call our Customer Service Department at 1-800-622-2378 or 203-359-1660. We can also be reached on the Internet at omega.com, e-mail: cservice@omega.com. When you receive the shipment, inspect the container and equipment for any signs of damage. Note any evidence of rough handling in transit. -
Page 11: Section 3 - Hardware Setup
POWER SUPPLY POWER LED STATUS LED DIMENSIONS mm (in) USB PORT Figure 3-1. OM-DAQ-USB-2401 Hardware and Dimensions NOTE: The external power port is used in applications which have USB hubs that are not self-powered. See the next section for more information. -
Page 12: Usb-Powered Hubs
Hardware Setup 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 source other than the host USB connector, with exception that they may draw up to 100 mA from their upstream connection for... -
Page 13: Connecting Your Om-Daq-Usb-2401 Acquistition Systems To Pc
4 to 5.25 V. Additional setup examples are described in this chapter, some of which involve USB hubs and/or power adaptors. POWER ADAPTER (OPTIONAL) Figure 3-2. Connection of an OM-DAQ-USB-2401 System to a Computer USB Port NOTE: Certain notebook computers require the use of a power adaptor with your DAQ unit. 3-3... -
Page 14: Connecting Various Hardware Setups
3.4 Connecting Various 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-powered hubs. -
Page 15: Connection To Usb-Powered Hub
Hardware Setup 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 receives 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 power adaptor. -
Page 16: Om-Daq-Usb-2401 Mounting
USB port locations vary 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) •... -
Page 17: Om-Daq-Usb-2401 Wall Mounting
Hardware Setup 3.5.1 OM-DAQ-USB-2401 Wall Mounting In order to mount the OM-DAQ-USB-2401 to the wall, you will need to: 1. Remove the rear screws from the OM-DAQ-USB-2401. 2. Align the mounting brackets with the rear holes on the DAQ unit (make sure that the ears are facing outwards, like in the figure below). -
Page 18: Om-Daq-Usb-2401 Din Rail Mounting
Hardware Setup 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 screws from the OM-DAQ-USB-2401. -
Page 19: Section 4 - Software
Section 4 - Software 4.1 Getting Started The following program files are 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. -
Page 20: Software Setup
From this screen you select the folder were you want the program files installed on your PC. The default setting will install the software under your “Program” folders in a new folder named “Omega” To continue with installing the program click the “Next >” button. -
Page 21: Confirm Installation Screen
Software Figure 4-3. Confirm Installation Screen The setup wizard now has all the information to complete the installation of the software on your PC. To continue with installing the program click the “Next >” button. During the install process, a Windows Command Prompt may pop up. No interaction is required in this window;... -
Page 22: Daq Central Software Operation
Software 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. - Page 23 Software TOOLBAR BUTTONS Start Button Initiates data acquisition for the highlighted device. Even if a Start Trigger is set, this must be pressed to Arm the device. Stop Button Stops data acquisition for the highlighted device. If a Stop Trigger is set, this will cancel the trigger.
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Page 24: Main Control Window Pull-Down Operations
These settings files contain all of the data that is found in the Device Configuration window. Figure 4-6. Device Menu Detect Devices Detects available OM-DAQ-USB-2401 devices which are currently connected to the computer through the USB. Configuration Same function as Configuration button . -
Page 25: Tools Menu
Export Data File – To convert data file from binary file to .csv file Figure 4-8. Help Menu Check for Updates To check for the latest Omega DAQ Central software update information through the Internet connection. About To view software version. -
Page 26: Device Configuration
Software Section 4.3.2 Device Configuration The Device Configuration window contains the Channel, Triggers, 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 Tab The Channels tab contains a spreadsheet designed for setting up channels for data acquisition. -
Page 27: Scan Options
Software 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 You can specify the Nickname (e.g., Oven 1, Monitor Room) Units You can specify the Engineering Unit. -
Page 28: Trigger Options
Software Figure 4-13. Trigger Options The Triggers tab is used to set up triggers for starting and stopping data acquisition. The Start Trigger and the Stop Trigger each have a different set of available trigger types: Figure 4-14. “Start Trigger” Options Figure 4-15. -
Page 29: Data Tab
Software NOTE: For all Start Trigger types, the device must be armed by pushing the Start Button on the main window. Data storage and display will not begin until the device triggers. Data Tab Figure 4-16. Data Tab To 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. -
Page 30: Main Window Screen
Software 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 4-12... -
Page 31: Waveform Screen
Software 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. -
Page 32: Power Line Rejection
Software 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 rejection mode, the maximum sample rate is as follows: • 50 Hz rejection: Scan Rate (SR) Range: 0.153Hz < SR <= 1Hz •... -
Page 33: Input Ranges
These rates were obtained with a 16-channel scan. 4.8 Analog Input Configuration The OM-DAQ-USB-2401 includes 16 analog signal inputs which may be used as 16 single-ended inputs, 8 differential inputs, or as a combination of single-ended and differential inputs with up to 16 connections. -
Page 34: Measurement Duration, Scan Time, And Resolution
(1 millisecond for one measurement duration). Scan Time (per scan) - The amount of time used for scanning (sampling) all selected channels’ input signal. For the OM-DAQ-USB-2401, the scan rates range from very slow (1 hour per scan) to very fast (1 milliseconds per scan). -
Page 35: Automatic Calibration
Software Resolution (Effective Number of Bits - ENOB, RMS) – The number of reliable data bits that exist for a signal’s measurement. The greater the resolution, the more detailed the reading. For example, with an increased resolution, a reading of 5.12 V could become 5.11896 V. The DAQ actually provides for 24 bits of data information;... -
Page 36: Thermocouple Measurements
Software 4.11 Thermocouple Measurements The OM-DAQ-USB-2401 provides effortless 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 readings into compensated-linearized temperature readings. A DAQ system can make thermocouple and volts measurements concurrently. -
Page 37: Section 5 - Signal Management
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. -
Page 38: Under Sampling And Aliasing
Signal Management Scan Rate vs. Resolution Resolution Scan Rate (Scans (ENOB Speed Designation Scan Time per Second - SPS) RMS) Very 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 <... -
Page 39: Examples Of Under Sampling
Signal Management The following table provides general advice regarding the selection of Scan Time. The concepts are further illustrated by the figure, Examples of Under Sampling. Scan Time (Measurement Scan Rate Analog Input Signal Duration) (Sample Rate) Resolution Steady, or gradual change Long High... -
Page 40: Triggering
Figure 5-2. Trigger Source Diagram 5.5 Signal Modes OM-DAQ-USB-2401 units operate in one of two modes, (1) single-ended mode, or (2) differential mode. These terms (single-ended mode and differential mode) apply to their use in this manual. In other sources these terms may be used in a different manner. -
Page 41: Noise Reduction In Differential Mode
(e.g., a non- grounded thermocouple). When the signal source has no direct connection to the system analog common, one must be provided. In Omega Daq the connection to analog common is provided in the circuitry with both the channel high and channel low connected to analog common. -
Page 42: System Noise
Signal Management Resolution: An analog-to-digital converter (ADC) converts an analog voltage to a digital number. The digital number represents the input voltage in discrete steps with finite resolution. ADC resolution is determined by the number of bits that represent the digital number. An n-bit ADC has a resolution of 1 part in 2n. Thus, 12 and 16 bit resolutions are as follows: •... -
Page 43: Input And Source Impedance
Signal Management 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 represented by the equation: VADC = VT x Ri / (Rs + Ri) The input impedance (Ri) of most ADCs is at least 1 MΩ;... -
Page 44: Section 6 - Troubleshooting
USB drivers are not found or hardware installation fails. This can happen if the device is plugged into the computer’s USB port before software installation is complete. The program “C:\Program Files\Omega\DAQ Central\USB Drivers\ CDM20814_Setup.exe” can be run to reinstall the USB drivers. All non-critical USB devices should be unplugged while this program runs, including all DAQ devices. -
Page 45: Section 7 - Service And Calibration
Service and Calibration Section 7 – Service & Calibration Your 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. -
Page 46: Section 8 - Specifications
Specifications Section 8 – Specifications 500V from PC General Isolation: External Excitation Output Voltage: +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 Types: J, K, T, E, R, S, B, N Cold-Junction Compensation... - Page 47 Specifications Type J: -18 to 1200°C (0 to 2192°F) Thermocouple Input Range: Type K: -129 to 1372°C (-200 to 2502°F) Type T: -101 to 400°C (-150 to 752°F) Type E: -184 to 1000°C (-300 to 1832°F) Type R: 204 to 1768°C (400 to 3214°F) Type S: 204 to 1768°C (400 to 3214°F) Type B: 538 to 1820°C (1000 to 3308°F) Type N: -129 to 1300°C (-200 to 2372°F)
- Page 48 Specifications Table 8-1. Thermocouple Accuracy (ºC) for OM-DAQ-USB-2401 TC Type Temp. Typical Fast (°C) Slow 1200 -129 1372 -101 -184 1000 14.8 13.1 1768 14.7 1768 12.8 13.7 1820 13.7 -129 1300 NOTE: Thermocouple accuracy excludes cold junction compensation error.
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Page 49: Section 9 - Approvals And Regulatory Compliance
Approvals and Regulatory Compliance 9.1 International Usage TPlease contact OMEGA for information on International Regulatory Compliance for each country. It is your (the user’s) responsibility to insure that these products are operated within the guidelines here in this manual and in conformance with all local or... - Page 50 NOTES:...
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- Page 53 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.
- Page 54 Where Do I Find Everything I Need for Process Measurement and Control? OMEGA…Of Course! Shop online at omega.com TEMPERATURE M U Thermocouple, RTD & Thermistor Probes, Connectors, Panels & Assemblies M U Wire: Thermocouple, RTD & Thermistor M U Calibrators & Ice Point References M U Recorders, Controllers &...