Omega manual OM-USB-1208FS channel gain queue feature, Error band plot

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OM-USB-1208FS User's Guide

Functional Details

The accuracy plots in Figure 12 are drawn for clarity and are not drawn to scale.

Figure 12. Error band plot

OM-USB-1208FS channel gain queue feature

The OM-USB-1208FS's channel gain queue feature allows you to set up a scan sequence with a unique per- channel gain setting and channel sequence.

The channel gain queue feature removes the restriction of using an ascending channel sequence at a fixed gain. This feature creates a channel list which is written to local memory on the OM-USB-1208FS. The channel list is made up of a channel number and range setting. An example of a four-element list is shown in the table below.

Sample channel gain queue list

Element

Channel

Range

 

 

 

0

CH0

BIP10V

 

 

 

1

CH0

BIP5V

 

 

 

2

CH7

BIP10V

 

 

 

3

CH2

BIP1V

 

 

 

When a scan begins with the gain queue enabled, the OM-USB-1208FS reads the first element, sets the appropriate channel number and range, and then acquires a sample. The properties of the next element are then retrieved, and another sample is acquired. This sequence continues until all elements in the gain queue have been selected. When the end of the channel list is detected, the sequence returns to the first element in the list.

This sequence repeats until the specified number of samples is gathered. You must carefully match the gain to the expected voltage range on the associated channel — otherwise, an over range condition can occur. Although this condition does not damage the OM-USB-1208FS, it does produce a useless full-scale reading. It can also introduce a long recovery time from saturation, which can affect the next measurement in the queue.

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Contents Page Page Table of Contents OM-USB-1208FS Users Guide Where to find more information About this Users GuideWhat you will learn from this user’s guide Conventions in this user’s guideIntroducing the OM-USB-1208FS ChapterOM-USB-1208FS block diagram Software featuresConnecting a OM-USB-1208FS to your computer is easy Installing the OM-USB-1208FS What comes with your OM-USB-1208FS shipment?Unpacking the OM-USB-1208FS HardwareInstalling the software Installing the hardwareBe sure you are using the latest system software If the LED turns offSoftware paced mode Continuous scan modeFunctional Details Theory of operation analog input acquisition modesScrew terminal pins USB connectorScrew terminal wiring Analog input terminals CH0 in CH7 Main connector and pin outSingle-ended configuration Single-ended measurements using differential channels Differential configurationChhi Chlo Power terminals For more information on analog signal connectionsFor more information on digital signal connections Analog output terminals D/A OUT 0 and D/A OUTCalibration terminal Ground terminalsExternal trigger terminal Sync terminalAccuracy Ideal ADC transfer functionADC transfer function with offset error OM-USB-1208FS channel gain queue feature Error band plotConfiguring for synchronous data acquisition Synchronizing multiple unitsSpecifications Analog inputRange Accuracy LSB Analog output Digital input/outputCounter External triggerExternal clock input/output Microcontroller PowerNon-volatile memory Main connector and pin out Channel differential modeGeneral EnvironmentalChannel single-ended mode

OM-USB-1208FS specifications

The Omega OM-USB-1208FS is a high-performance data acquisition device designed for engineers and technicians who require accurate data logging and analysis in their experiments and applications. This versatile device is equipped with a range of features that make it an ideal choice for various measurement tasks across different industries.

One of the standout features of the OM-USB-1208FS is its ability to support a wide variety of input signals. The device is equipped with 16 analog input channels, which can be used for both voltage and thermocouple inputs, making it suitable for temperature monitoring and other signal measurements. The analog inputs provide a resolution of 16 bits, ensuring precise and reliable readings. Furthermore, it supports sampling rates of up to 100 kS/s, allowing for rapid data acquisition and real-time monitoring.

In addition to its analog capabilities, the OM-USB-1208FS has digital I/O lines that facilitate control and automation tasks. With 8 digital input/output channels, users can easily manage various external devices, sensors, or actuators, enhancing the overall functionality of the data acquisition system. This makes the device suitable for automation projects, as users can trigger actions based on acquired data.

Another distinguishing feature is the built-in USB interface, which offers a straightforward connection to computers without the need for additional power supplies or complex setups. The device is fully compatible with various operating systems, including Windows, making it easy to integrate into existing systems. The included software allows for easy data logging, visualization, and analysis, simplifying the process for users.

The OM-USB-1208FS is designed with durability and reliability in mind. Its compact and rugged construction ensures that it can withstand the rigors of fieldwork and laboratory use. Moreover, the device's comprehensive range of input types and robust performance specifications make it an asset for researchers across diverse fields, including environmental monitoring, manufacturing, and academic research.

In summary, the Omega OM-USB-1208FS is a powerful data acquisition solution that combines a multitude of features and technologies. With its high-resolution analog inputs, digital I/O capabilities, user-friendly USB interface, and reliable construction, it caters to the diverse needs of professionals seeking to capture and analyze data accurately and efficiently. Whether for academic research, industrial applications, or environmental monitoring, the OM-USB-1208FS stands out as a top choice in the data acquisition landscape.
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