Omega Engineering Comprehensive Hardware Setup for the Omega Thermocouple Reader

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3Hardware 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 hub internal functions. The external power is used for hub internal functions and for the hub’s ports. Each port of a self-powered hub must be capable of supplying 500 mA.

3.2.3 Power Adaptors

Power adaptors, also referred to as auxiliary power packs, are required for some self-powered hubs, and for DAQ modules that are powered from USB-powered hubs. In addition, DAQ units will require the use of a power adaptor when used with certain laptops.

NOTE:

When using a power adaptor with your DAQ system, be sure to supply power (from the adaptor to the DAQ unit) before connecting the USB cable. This allows the DAQ to inform the host computer (upon connection of the USB cable) that the unit requires minimal power from the computer.

Power adaptors for use with the DAQ have a current limit of 500 mA (min.) and a voltage range of +7.5 to +12 Volts DC. These specifications are provided on the end-face of the DAQ unit.

If the computer does not recognize the DAQ unit, make sure the computer’s USB port is properly enabled and is in good working order. If the computer still fails to recognize the DAQ unit, the use of an external 9v DC power adaptor may be required.

NOTE:

The use of certain notebook computers may require the use of a power adaptor with your DAQ unit.

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Contents OM-DAQ-USB-2401 Servicing North America OM-DAQ-USB-2400 Multiple Channel USB Data Acquisition Module OM-DAQ-USB-2400 International Usage and CE Marking 10-1List of Figures SectionExamples of Under Sampling Precautions IntroductionSafety Warnings and IEC Symbols Statement on CE MarkingGeneral Description & System Components System Components Hardware Package InspectionIncluded Items Hardware Setup USB Hubs and Power AdaptorsOM-DAQ-USB-2401 System Components USB-powered Hubs Self-powered HubsPower Adaptors Connecting Your OM-DAQ-USB-2401 Acquisition System to PC Connecting Various Hardware Setups Direct Connection to Computer USB PortsConnection to USB-powered Hub Connections to Self-Powered and USB-powered HubsConnections to Self-Powered Hub and to USB-Powered Hub OM-DAQ-USB-2401 MountingOM-DAQ-USB-2401 Wall Mounting OM-DAQ-USB-2400 SeriesOM-DAQ-USB-2401 DIN Rail Mounting OM-DAQ-USB-2401 Rail MountingSoftware Installation SoftwareGetting Started System RequirementsSoftware Setup Welcome ScreenConfirm Installation Screen DAQ Central Software Operation Main Control WindowToolbar Buttons Toolbar ButtonsMain Control Window Pull-Down Operations File MenuTools Menu 2 Device Configuration Channels TabConfiguration Parameter Settings Manual Acquisition is manually started/stopped Level Data Tab Data Displays18. Main Window Screen 23. Waveform Screen Power Line Rejection Optical IsolationA/D Conversion Analog Input Configuration Input RangesMeasurement Duration, Scan Time, and Resolution Automatic Calibration 27. Calibration/Scan Arrangement28. Thermocouple Wiring Thermocouple MeasurementsSignal Management Scan Time and ResolutionResolution Effective Number of Bits ENOB, RMS Channel Control and ExpansionUnder Sampling and Aliasing RMSSignal Examples of Under SamplingSignal Modes TriggeringNoise Reduction in Differential Mode System Noise AveragingAnalog Filtering Input and Source Impedance CrosstalkVadc = VT x Ri / Rs + Ri = RCCE Conformity OM-DAQ-USB-2401 Design for CE ConformityFerrite Core Troubleshooting Basic ChecklistSymptoms and Solutions Service & Calibration Service & CalibrationSpecifications Power Supply External Power SourceThermocouple Input Range Cold JunctionThermocouple Accuracy ºC for OM-DAQ-USB-2401 TC Type Temp Typical Fast SlowApprovals and Regulatory Compliance International Usage & CE Marking10-2 10-3 10-4 WARRANTY/DISCLAIMER Temperature