Omega OM-DAQ-USB-2401 - Manual

Section 1 - Introduction Please read this manual completely before installing and operating your Omegadata acquisition system. It’s important to read and follow all notes, cautions,warnings and safety precautions before operating this device. “Device” refers toyour data acquisition unit. 1.1 Precaut...

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 savemode is disabled. If needed, consult your PC user’s manual todisable energy save (power suspension) modes. 1.2 Safety Warnings and IEC S...

Section 2 - Hardware It is important that you read this manual completely and follow all safetyprecautions before operating this instrument. 2.1 Package Inspection Remove the packing list and verify that you have received all your equipment. Ifyou have any questions about the shipment, please call o...

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 port is used in applications which haveUSB hubs that are not self-powered. See the next section formore information. The 'STATUS LED' blinking at Scan Rate means an...

3.4 Connecting Various Hardware Setups ON-DAQ-USB-2401 data acquisition systems range from simple to complex. Oneexample of a simple system is that of one OM-DAQ-USB-2401 connected to aPC’s USB connector. A much more complex system is one that contains 10 OM-DAQ-USB-2401 units and a combination of U...

4-1 Software 4 Section 4 - Software 4.1 Getting Started The following program files are included on the Omega DAQ Central UserSoftware CD supplied with your data acquisition unit. These files can also bedownloaded from the omega.com website should you misplace your CD. • DAQ Central data logging sof...

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...

TOOLBAR BUTTONS Start Button Initiates data acquisition for thehighlighted device. Even if a StartTrigger is set, this must be pressedto Arm the device. Stop Button Stops data acquisition for thehighlighted device. If a StopTrigger is set, this will cancel thetrigger. Device Accesses the Device Conf...

Section 4.3.2 Device Configuration The Device Configuration window contains the Channel, Triggers, and Datatabs. 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 C...

Configuration Parameter Settings Channel The input channel’s name (not editable)AN1D = analog channel 1, differential inputAN1H = analog channel 1, single-ended high inputAN1L = analog channel 1, single-ended low inputEtc. Nickname You can specify the Nickname (e.g., Oven 1, MonitorRoom) Units You c...

Figure 4-13. Trigger Options The Triggers tab is used to set up triggers for starting and stopping dataacquisition. The Start Trigger and the Stop Trigger each have a different set ofavailable trigger types: Figure 4-14. "Start Trigger" Options Figure 4-15. "Stop Trigger" Options Tri...

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 datacan be saved in...

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

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 flexibleinput multiplexer handles differential or single-ended signals; the programmablefilter allows the user to optimize between a resolution of up...

In DAQ applications, thermocouples should not be connectedsingle-ended. Doing so can result in noise and false readings.This is especially true when acquiring other high-amplitudesignals in conjunction with thermocouple signals that areconnected single-ended. The DAQ units include built-in cold-junc...

Resolution (Effective Number of Bits - ENOB, RMS) – The number of reliable data bits that exist for a signal’s measurement. The greater the resolution, themore detailed the reading. For example, with an increased resolution, a readingof 5.12 V could become 5.11896 V. The DAQ actually provides for 24...

4.11 Thermocouple Measurements The OM-DAQ-USB-2401 provides effortless thermocouple (TC) measurements.The unit includes built-in cold-junction compensation (CJC), which isautomatically invoked when you select TC measurements. The DAQ unitautomatically converts acquired voltage readings into compensa...

Section 5 – Signal Management 5.1 Channel Control and Expansion In the OM-DAQ-USB-2401 system, the quantities and types of DAQ units useddetermine the system’s channel capacity. Up to 10 OM-DAQ-USB-2401s can beused with one host PC. See the Specifications for more detailed channelinformation. 5.2 Sc...

Scan Rate vs. Resolution 2 Resolution Scan Rate 3,4 (Scans (ENOB 5 Speed Designation Scan Time 1 (s) 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 < SR <=1 21 Slow, 60 Hz reject...

Differential mode refers to a mode, or circuit set-up, in which a voltage is measured between two signal lines. The measured differential voltage is used fora single channel. An advantage of using differential inputs is that they reducesignal errors and the induction of noise resulting from ground c...

5.9 Input and Source Impedance As illustrated below, the input impedance (Ri) of an analog-to-digital convertercombines with the transducer ’s source impedance (Rs) forming a voltagedivider. This divider distorts the voltage being read at the analog-to-digitalconverter. The actual voltage read is re...

Section 6 - CE Conformity 6.1 OM-DAQ-USB-2401 Design for CE Conformity The OM-DAQ-USB-2401 has been designed to meet requirements as outlined inEuropean Community EMC Directive EN61326. Three ferrite cores are includedin the OM-DAQ-USB-2401 package. When powering the unit using the adapter,the ferri...

Figure 6-2 Ferrite Core The ferrite cores may be removed from the DAQ unit; however, in order toconform to CE standards, all of the ferrite cores must be attached to the USBcable and power adapter. If the user is not using the power adapter but relying onpower from the host USB connection, no ferrit...

Section 7 – Troubleshooting 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 sure its power cable isplugged in. Signal – Check signal lines and connections. Connectors must be free of corrosion. Signal l...

Section 8 – Service & Calibration Your Omega DAQ components have been built and factory calibrated to meet orexceed the specifications listed here in this manual. The following sectionprovides information on how to have your device serviced. 8.1 Service & Calibration If any of your DAQ syste...

Section 9 – Specifications General Isolation: 500V from PC 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...

10.1 International Usage & CE Marking The OM-DAQ-USB-2401 multiple channel USB data acquisition module is CEmarked and certified for use in several European countries. Please contactOMEGA for information on International Regulatory Compliance for eachcountry. It is your (the user ’s) responsibil...

WARRANTY/ DISCLAIMER OMEGA ENGINEERING, INC. warrants this unit to be free of defects in materials and workmanship for aperiod 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...

M5025/0112 Where Do I Find Everything I Need for Process Measurement and Control? OMEGA…Of Course! Shop online at omega.com SM TEMPERATURE 䡺 ⻬ Thermocouple, RTD & Thermistor Probes, Connectors, Panels & Assemblies 䡺 ⻬ Wire: Thermocouple, RTD & Thermistor 䡺 ⻬ Calibrators & Ice Point R...