Dataq Instruments DI-158 Series Manual de usuario

The way PC-based instrumentation should be

DI-148U

8-Channel USB Data Acquisition Starter Kit

DI-148U-SP

USB Data Acquisition Starter Kit with Two String Pot Inputs

DI-158 Series

USB Data Acquisition Starter Kit with 4 Fixed Differential Channels

User's Manual

Manual Revision J

DATAQ Instruments, Inc., except as otherwise indicated and shall not be reproduced, transmitted, transcribed, stored

in a retrieval system, or translated into any human or computer language, in any form or by any means, electronic,

mechanical, magnetic, optical, chemical, manual, or otherwise without expressed written authorization from the com-

pany. The distribution of this material outside the company may occur only as authorized by the company in writing.

DATAQ Instruments' hardware and software products are not designed to be used in the diagnosis and treatment of

humans, nor are they to be used as critical components in any life-support systems whose failure to perform can rea-

sonably be expected to cause significant injury to humans.

Designed and manufactured in the

United States of America

iii

Warranty and Service Policy

Product Warranty

DATAQ Instruments, Inc. warrants that this hardware will be free from defects in materials and workmanship under

normal use and service for a period of 90 days from the date of shipment. DATAQ Instruments' obligations under this

warranty shall not arise until the defective material is shipped freight prepaid to DATAQ Instruments. The only

responsibility of DATAQ Instruments under this warranty is to repair or replace, at its discretion and on a free of

charge basis, the defective material.

This warranty does not extend to products that have been repaired or altered by persons other than DATAQ Instru-

ments employees, or products that have been subjected to misuse, neglect, improper installation, or accident.

DATAQ Instruments shall have no liability for incidental or consequential damages of any kind arising out of the sale,

installation, or use of its products.

Service Policy

1. All products returned to DATAQ Instruments for service, regardless of warranty status, must be on a freight-pre-

paid basis.

2. DATAQ Instruments will repair or replace any defective product within 5 days of its receipt.

3. For in-warranty repairs, DATAQ Instruments will return repaired items to the buyer freight prepaid. Out of war-

ranty repairs will be returned with freight prepaid and added to the service invoice.

CAUTION

READ BEFORE CONNECTING INPUT SIGNALS

The data acquisition device you have purchased and are about to use is NOT an ISOLATED product. This means

that it is susceptible to common mode voltages that could cause damage to the device. SUCH DAMAGE IS NOT

COVERED BY THE PRODUCT’S WARRANTY. Please read the following carefully before deploying the prod-

uct. Contact DATAQ Instruments Support at 330-668-1444 for all questions.

This product can tolerate a maximum applied voltage of only ±20V peak without damage. Although you may be cer-

tain that the signal you want to measure is lower than this level, a common mode voltage (CMV) with an unknown

value may combine with your signal of interest to exceed this ±20V limit. In such instances, the product will be dam-

aged. Verify a CMV does not exist before connecting signals and acquiring data with your device. Use the following

procedure to check for CMV:

1. DO NOT connect your data acquisition device to the device under test. If the device under test is connected to

your data acquisition device, disconnect it.

2. Connect your data acquisition device to the appropriate interface on your PC (USB, Ethernet, RS-232 Serial, or

Parallel Printer Port).

3. Apply power to your data acquisition device, your PC, and the device under test.

4. Use a digital voltmeter to make the following measurements:

a. Measure the voltage (both the AC and DC range) between the ground terminal of your data acquisition

device and Signal+ of the device under test. This measurement should not exceed the Full Scale Range of

your data acquisition device.

b. Measure the voltage (both the AC and DC range) between the ground terminal of your data acquisition

device and Signal- of the device under test. This measurement should be at or very near 0 Volts.

c. Measure the voltage (both the AC and DC range) between the ground terminal of your data acquisition

device and Common of the device under test. This measurement should be at or very near 0 Volts.

5. Should ANY of these measurements exceed their recommendation DO NOT CONNECT SIGNALS to the data

acquisition device. A common mode voltage may exist that could destroy the instrument. You MUST determine

the source of the CMV and eliminate it before taking any measurements.

1Measured signal is not to exceed the Full Scale Range of your data acquisition device.

2Measured signal must be at or very near 0 volts.

3Measured signal must be at or very near 0 volts.

4Connect to AGND (Analog Ground) port on DI-148 or DI-158 instruments.

Device

Under

Test

Signal + 1

Signal - 2

Common3

Digital Voltmeter

Data

Acquisition

Device

To PC

Ground4

DI-148U, DI-148U-SP, and DI–158 Series Hardware Manual

Table of Contents

vii

Table of Contents

Warranty and Service Policy ................................................................................................................ iii

CAUTION ............................................................................................................................................... v

1. Introduction ........................................................................................................................................ 1

Features .............................................................................................................................................. 1

Analog Inputs .................................................................................................................................... 1

Digital Input and Output .................................................................................................................... 2

Software ............................................................................................................................................. 2

WinDaq® Recording and Playback Software ............................................................................ 2

Dataq Instruments Hardware Manager ....................................................................................... 3

Help ............................................................................................................................................. 3

2. Specifications ...................................................................................................................................... 5

DI-148 Analog Inputs ........................................................................................................................ 5

DI-158 Analog Inputs ........................................................................................................................ 5

A/D Characteristics ............................................................................................................................ 6

Analog Outputs (DI-158 Series only) ................................................................................................ 6

Scanning Characteristics .................................................................................................................... 6

Digital I/O .......................................................................................................................................... 7

Calibration ......................................................................................................................................... 7

USB Interface .................................................................................................................................... 7

General ............................................................................................................................................... 7

3. Installation .......................................................................................................................................... 9

Connecting the Instrument to Your Computer .................................................................................. 9

Installing the Device Drivers ............................................................................................................. 9

Installing WinDaq Software and the Dataq Instruments Hardware Manager ................................... 10

Activation of WinDaq/High Speed Option ....................................................................................... 12

Dataq Instruments Hardware Manager .............................................................................................. 12

4. Connecting Input Signals .................................................................................................................. 13

DI-148U Connections ........................................................................................................................ 13

DI-148U-SP Connections .................................................................................................................. 14

Calibrating String Pot Inputs ....................................................................................................... 15

DI-158 Series Connections ................................................................................................................ 16

Connecting to Ground ................................................................................................................. 16

Port Designations ........................................................................................................................ 16

Connecting Signals ............................................................................................................................ 17

Digital I/O .......................................................................................................................................... 17

Taking Process Current Measurements with a DI-158 ...................................................................... 17

5. Analog Input Diagram ....................................................................................................................... 21

DI-148U ............................................................................................................................................. 21

DI-148U-SP ....................................................................................................................................... 21

DI-158 Series ..................................................................................................................................... 22

DI-148U, DI-148U-SP, and DI–158 Series Hardware Manual

Introduction

1. Introduction

This manual contains information designed to familiarize you with the features and functions of the DI-148U, DI-

148U-SP, and the DI-158 Series data recording modules. These high-end Starter kits contain features and functional-

ity normally reserved for more expensive data acquisition systems.

Features

The DI-148U data acquisition instrument is a portable data recording module that communicates through your com-

puter's USB port. Power is derived from the interface port so no external power is required. Features include:

• 8 single-ended analog inputs.

• Six digital I/O for Remote control.

• ±10V full scale measurement range.

• 14,400 samples per second maximum sampling rate.

The DI-148U-SP data acquisition instrument is a portable data recording module designed specifically for use with

String Pots that communicates through your computer's USB port. Power is derived from the interface port so no

external power is required. Features include:

• 2 string pot inputs plus 2 single-ended general purpose analog inputs.

• Six digital I/O for Remote control.

• ±10V full scale measurement range.

• 14,400 samples per second maximum sampling rate.

The DI-158 data acquisition instrument is a portable data recording module that communicates through your com-

puter's USB port. Features include:

• 4 fixed differential analog inputs.

• 4 digital I/O for Remote control.

• Programmable Gain option allowing 10 different gain settings from ±64V FS measurement range to ±0.125V FS

measurement range (depending on model).

• Up to 14,400 samples per second maximum sampling rate.

Analog Inputs

The DI-148U features eight single-ended analog channel inputs located on a single eight-position screw terminal

block for easy connection and operation. The 10-entry input scan list allows you to scan any sequence of input chan-

nels at any software-configurable channel setting. Note: The DI-148U does not support Gain.

The DI-148U-SP features two string pot inputs (three terminals each: ground, voltage, wiper) and two single-ended

analog channel inputs located on a single eight-position screw terminal block for easy connection and operation. The

6-entry input scan list allows you to scan any sequence of input channels at any software-configurable channel set-

ting. Note: The DI-148U-SP does not support Gain.

The DI-158 Series features four differential channel inputs located on a single eight-position screw terminal block for

easy connection and operation. The 6-entry input scan list allows you to scan any sequence of input channels at any

software-configurable gain setting. Standard models (DI-158U) feature 4 programmable gain ranges at a full scale

DI-148U, DI-148U-SP, and DI–158 Series Hardware Manual

Introduction

range of ±10 Volts while the DI-158 Programmable Gain option (DI-158UP) allows 10 gain ranges with a full scale

range of ±64 Volts.

Utilize the functionality of WINDAQ software to experience all the features encased in these small, inexpensive

instruments.

Digital Input and Output

The DI-148U and DI-148U-SP contain six software-programmable digital lines (bits) for input/output operations; the

DI-158 Series Instruments contain four. These lines provide an interface for the transfer of data between user memory

and a peripheral device connected to the instrument. Digital inputs can monitor alarms or sensors with TTL outputs,

while digital outputs can drive TTL inputs on control or measurement equipment. Remote control can be utilized with

bits 0 and 1 (for location see “Chapter 4. Connecting Input Signals”) using WINDAQ software. The digital I/O may be

enabled as Channel 9 using a DI-148U or Channel 5 using a DI-148U-SP or DI-158 model in WINDAQ software.

Software

All software required to record and playback waveforms is included with the purchase of any DI-148 or DI-158

Series data acquisition starter kit.

WINDAQ®Recording and Playback Software

WINDAQ Acquisition and WINDAQ Waveform Browser allow you to record and playback data acquired through your

instrument. WINDAQ software is an invaluable resource to record and analyze your data.

WINDAQ Acquisition software can be used to record waveforms directly and continuously to disk while monitoring a

real time display of the waveforms on-screen. It operates and displays waveform signals in real time at the full sample

rate of the instrument being used. There are two versions of WINDAQ Acquisition software available for use with DI-

148 and DI-158 Instruments: WINDAQ/Lite and WINDAQ/HS (High Speed) option. WINDAQ/Lite is free but is

restricted to recording rates of 240 Hz. WINDAQ/HS option is an extra-cost option allowing you to record data at the

speed of your data acquisition system. When you install the software, a trial version of WINDAQ/HS is automatically

installed allowing you to run the software for a limited time. Activation is required for continued use to ensure com-

pliance with the Software License Agreement. WinDaq Acquisition software is accessed via the Dataq Instruments

Hardware Manager located in the Program group as specified during installation.

WINDAQ Waveform Browser playback software (also known as “WWB”) offers an easy way to review and analyze

acquired waveforms. A built-in data file translator allows the user to display multiple waveforms acquired by

WINDAQ Acquisition software or any of a wide range of data acquisition packages. The software’s disk-streaming

design allows data files of any length to be graphically displayed rapidly, in normal or reverse time directions. Seven

standard cursor-based measurements, frequency domain, and statistical analysis functions help simplify waveform

analysis and interpretation. WINDAQ Waveform Browser is free and installed when installing WINDAQ Software.

DI-158U DI-158UP

Gain Range Gain Range

1 ±10V 1 ±64V

2 ±5V 2 ±32V

4 ±2.5V 4 ±16V

8 ±1.25V 8 ±8V

16 ±4V

32 ±2V

64 ±1V

128 ±0.5V

256 ±0.25V

512 ±0.125V

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