Omega OM-LGR-5325 User guide

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Table of Contents

Preface

About this User's Guide ....................................................................................................................... 5

What you will lear n from this user's guide ......................................................................................................... 5

Conventio ns in this user's guide ......................................................................................................................... 5

Chapter 1

Introducing the OM-LGR-5325 ............................................................................................................. 6

OM-LGR-5325 block diagram ........................................................................................................................... 7

Chapter 2

Getting Started with the OM-LGR-5325 ............................................................................................... 8

Unpacking t he OM-LGR-5325 ........................................................................................................................... 8

What comes with your OM-LGR-5325 shipment? ............................................................................................. 8

Hardware .......................................................................................................................................................................... 8

Installing the software ........................................................................................................................................ 9

Installing the hardware ....................................................................................................................................... 9

Providing power to the OM-LGR-5325 ............................................................................................................................ 9

Connecting the OM-LGR-5325 to your system ................................................................................................................ 9

Chapter 3

Functional Details ............................................................................................................................... 10

OM-LGR-5325 external components ............................................................................................................... 10

Buttons and LEDs (top of case) .......................................................................................................................................11

Screw terminals and LED in dicators ................................................................................................................................13

Analog input terminals ..................................................................................................................................... 14

Trigger te rminals .............................................................................................................................................. 14

External digital trigger .....................................................................................................................................................15

External analog trigger (single-channel) ..........................................................................................................................15

Digital-pattern trigger ......................................................................................................................................................18

Digital input and output terminals .................................................................................................................... 18

Counter input terminals and modes .................................................................................................................. 18

Counter mode ...................................................................................................................................................................19

Period measurement mode ...............................................................................................................................................20

Pulse width measurement mode .......................................................................................................................................20

Timing measurement mode ..............................................................................................................................................20

Debounce mode ...............................................................................................................................................................20

Trigger after stable mod e .................................................................................................................................................21

Trigger before stable mode ..............................................................................................................................................21

Debounce mode comparisons ..........................................................................................................................................22

Chapter 4

Specifications ...................................................................................................................................... 24

Analog input ..................................................................................................................................................... 24

Analog input calibration ................................................................................................................................... 25

External clock input .......................................................................................................................................... 25

Input sequencer ................................................................................................................................................. 25

Triggering ......................................................................................................................................................... 25

External analog trigger ..................................................................................................................................... 26

Digital input ...................................................................................................................................................... 26

Digital output .................................................................................................................................................... 26

Fault tolerance .................................................................................................................................................. 27

Counters ............................................................................................................................................................ 27

Device configuration ........................................................................................................................................ 27

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OM-LGR-5325 User's Guide

Controls/indicators............................................................................................................................................ 28

Data Memory .................................................................................................................................................... 28

Power ................................................................................................................................................................ 28

Chassis ground .................................................................................................................................................. 29

USB specifications ........................................................................................................................................... 29

Environmental .................................................................................................................................................. 29

Mechanical ....................................................................................................................................................... 29

Screw terminal connector type ......................................................................................................................... 29

Screw terminal pin out .....................................................................................................................................................30

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Preface

About this User's Guide

What you will learn from this user's guide

This user's guide explain s how to install, and use the OM-LGR-5325 so that you get the most out of its USB
data acquisition features.

This user's guide also refers you to related documents available on our web site, and to technical support
resources.

Conventions in this user's guide

For more information on …

Text presented in a box signifies ad ditional information and helpful hints related to the subj ect matter you are
reading.

Caution! Shaded caution statements present information to help you avoid injuring yourself and others,

damaging your hardware, or losing your data.

<#:#> Angle brackets that enclose numbers separated by a colon signify a range of numbers, such as those assigned

to registers, bit settings, etc.

bold text Bold text is used for the names of objects on the screen, such as buttons, text boxes, and check boxes. For

example:

1. Insert the disk or CD and click the OK button.

italic text Italic text is used for the names of manuals and help topic titles, and to emphasize a word or phrase. For

example:

■ The software installation procedure is explained in the DAQLog Software User’s Guide.

■ Never touch the exposed pins or circuit connections on the board.

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Chapter 1

Introducing the OM-LGR-5325

This user's guide contain s all of the information you ne ed to connect the OM-LGR-5325 to your computer and
to the signals you want to measure and log.

®

The OM-LGR-5325 is a USB 2.0 full-speed device supported under popular Microsoft
systems. The OM-LGR-5325 is compatible with both USB 1.1 and USB 2.0 ports.

With a multiplexed 16-bit A/D converter and a maximum sampling rate of 100 kS/s for all analog input
channels, the OM-LGR-5325 can sample:

 Up to 16 single-ended analog inputs
 Up to eight differential analog inputs
 In ranges of ±10 V, ±5 V, ±1 V

You can start an analog input scan by:

Windows® operating

 Pressing the
 Configuri ng an external d igital trigger
 Configuri ng an external analog trigger
 Configuri ng a digital pattern trigger
 Pressing the

The OM-LGR-5325 also has 16 digital input connections (TTL thresholds with 28 V tolerance) that you can
configure to detect and log events based on change of state or pattern recognition..

The OM-LGR-5325's single digital output is a 500 V alarm output implemented as a single Form C relay. You
can configure the relay to energize when the trigger condition is met and data is being recorded.

The OM-LGR-5325's four counter channels support the following counter modes:

 Counter (ge neral event counting)
 Period counting
 Pulse width c ounting
 Edge-to-edge timing
 Up/down counting

You can use the Modulo N number and mode with all of the counter modes listed to determine how the counter
behaves when it reaches the modulo number you set.

The device saves data to and retrieves data from a Secure Digital (SD) or Secure Digital High Capacity (SDHC)
memory card. The OM-LGR-5325 requires 9–30 V of external power.

The OM-LGR-5325 is shown below. Use the two sets of screw terminals on the OM-LGR-5325 to make all I/O
connections.

START button

TRIG button to manually override a configured trigger

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OM-LGR-5325 User's Guide Introducing the OM-LGR-5325

For information on the features of the DAQLog software incl ud ed with yo ur OM-LGR-5325, refer to the
DAQLog Software User’s Guide that shipped with your device.

OM-LGR-5325 block diagram

Figure 1 shows a simplified block diagram of the OM-LGR-5325. This device provide s all of the functional
elements shown in the figure.

Figure 1. OM-LGR-5325 functional block diagram

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Chapter 2

Getting Started with the OM-LGR-5325

This document explains how to unpack, connect, and use the OM-LGR-5325 to perform and log analog input
scans, digital input scans, and counter operations.

Unpacking the OM-LGR-5325

As with any electronic device, you should take care while handling to avoid damage from static
electricity. Before removing the OM-LGR-5325 from its packaging, ground yourself using a wrist strap, or by
simply touching the computer chassis or other grounded object to eliminate any stored static charge.

If your OM-LGR-5325 is damaged, notify Omega Engineering immediately by phone, fax, or e-mail.

 Phone: [phone]
 Fax: [phone]
 Email:

What comes with your OM-LGR-5325 shipment?

As you unpack your OM-LGR-5325, ve rify that the foll owing components are incl uded.

[email protected]

Hardware

 OM-LGR-5325

 USB cable (2-meter length)

 SD card

 9 V, 1 A external power supply for use when OM-LGR-5325 is not powered through the screw terminals

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