Omega OM-USB-1208FS manual Specifications, Analog input

Page 22

Chapter 4

Specifications

All specifications are subject to change without notice.

Typical for 25°C unless otherwise specified.

Specifications in italic text are guaranteed by design.

Analog input

Table 1. Analog input specifications

Parameter

Conditions

Specification

 

 

 

A/D converter type

 

Successive approximation type

 

 

 

Input voltage range for linear operation,

CHx to GND

±10 volts (V) max

single-ended mode

 

 

 

 

 

 

Input common-mode voltage range for linear

CHx to GND

-10 V min, +20 V max

operation, differential mode

 

 

 

 

 

 

Absolute maximum input voltage

CHx to GND

±28 V max

 

 

 

Input impedance

 

122KOhm

 

 

 

Input current (Note 1)

Vin = +10 V

70 microamperes (µA) typ

 

Vin = 0 V

-12 µA typ

 

Vin = -10 V

-94 µA typ

 

 

 

Number of channels

 

8 single-ended / 4 differential, software

 

 

selectable

Input ranges, single-ended mode

 

±10 V,

G=2

 

 

 

 

Input ranges, differential mode

 

±20 V,

G=1

 

 

±10 V,

G=2

 

 

±5 V,

G=4

 

 

±4 V,

G=5

 

 

±2.5 V,

G=8

 

 

±2.0 V,

G=10

 

 

±1.25 V, G=16

 

 

±1.0 V,

G=20

 

 

Software selectable

Throughput (Note 2)

Software paced

250 samples per second (S/s) typ,

 

 

PC-dependent

 

Continuous scan

50 kilosamples per second (kS/s)

 

 

 

Channel gain queue

Up to 16 elements

Software configurable channel, range, and

 

 

gain.

 

 

 

 

Resolution (Note 3)

Differential

12 bits, no missing codes

 

 

 

 

 

Single-ended

11 bits

 

 

 

 

CAL accuracy

CAL = 2.5 V

±36.25 mV max

 

 

 

Integral linearity error

 

±1 least significant bit (LSB) typ

 

 

 

Differential linearity error

 

±0.5 LSB typ

 

 

 

Repeatability

 

±1 LSB typ

CAL current

Source

5 milliamperes (mA) max

 

Sink

20 µA min, 100 µA typ

 

 

 

Trigger source

Software selectable

External digital: TRIG_IN

 

 

 

 

Pacer source

Software selectable

Internal

 

 

 

External (SYNC), rising edge triggered

 

 

Programmed IO

 

 

 

 

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Contents Page Page Table of Contents OM-USB-1208FS Users Guide What you will learn from this user’s guide Where to find more informationAbout this Users 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 Unpacking the OM-USB-1208FS Installing the OM-USB-1208FSWhat comes with your OM-USB-1208FS shipment? HardwareBe sure you are using the latest system software Installing the softwareInstalling the hardware If the LED turns offFunctional Details Software paced modeContinuous scan mode Theory of operation analog input acquisition modesScrew terminal wiring USB connectorScrew terminal pins Single-ended configuration Main connector and pin outAnalog input terminals CH0 in CH7 Single-ended measurements using differential channels Differential configurationChhi Chlo For more information on digital signal connections Power terminalsFor more information on analog signal connections Analog output terminals D/A OUT 0 and D/A OUTExternal trigger terminal Calibration terminalGround terminals 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/outputExternal clock input/output External triggerCounter Non-volatile memory PowerMicrocontroller General Main connector and pin outChannel differential mode 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.