Dataq DI-245 Manuale utente

The way PC-based instrumentation should be

DI-245

Millivolt, Voltage, and Thermocouple Data Acquisition System

User's Manual

Manual Revision G

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.

DATAQ Instruments, Inc.

241 Springside Drive

Akron, Ohio 44333 U.S.A.

Telephone: 330-668-1444

Fax: 330-666-5434

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 1 year 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.

Table of Contents

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

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

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

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

Digital Inputs ...................................................................................................................................... 1

Software ............................................................................................................................................. 1

WinDaq® Recording and Playback Software ............................................................................. 1

The DATAQ Instruments Hardware Manager ............................................................................ 2

Help ............................................................................................................................................. 2

2. Specifications ....................................................................................................................................... 3

Analog Inputs ..................................................................................................................................... 3

Digital Inputs ...................................................................................................................................... 4

ADC Characteristics ........................................................................................................................... 4

Indicators, Connections, Controls ...................................................................................................... 5

Environmental .................................................................................................................................... 5

Power .................................................................................................................................................. 5

Physical Characteristics ..................................................................................................................... 5

Software ............................................................................................................................................. 5

3. Installation ........................................................................................................................................... 7

Installing WinDaq Software and the DATAQ Instruments Hardware Manager ............................... 7

Connecting the Instrument to Your Computer ................................................................................... 8

DATAQ Instruments Hardware Manager .......................................................................................... 8

4. Controls, Indicators, and Connections ............................................................................................. 9

Mini-B USB Connection .................................................................................................................... 9

Connecting Input Signals ................................................................................................................... 9

DI-245 Signal Connections ......................................................................................................... 9

Connect Analog Input Channel 1 ................................................................................................ 10

Connecting Signal Leads ............................................................................................................. 10

Gain Settings for Voltage Measurements .................................................................................... 11

Digital Inputs ............................................................................................................................... 12

WinDaq Remote Events (Evnt/DI0) ..................................................................................... 13

WinDaq Remote Storage (Rcrd/DI1) .................................................................................... 15

LED Indicators ................................................................................................................................... 15

5. DI-245 Block Diagram ........................................................................................................................ 17

6. Dimensional Drawing ......................................................................................................................... 19

DI-245 Hardware Manual

Introduction

1. Introduction

This manual contains information designed to familiarize you with the features and functions of the DI-245 USB mil-

livolt, volt, and thermocouple data acquisition system.

Features

The DI-245 data acquisition instrument is a portable data recording module that communicates through your com-

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

• 4 fixed differential analog inputs protected to ±150V (transient) programmable as voltage or thermocouple

inputs.

• ±50V full scale measurement range.

• 12 programmable gain ranges per channel (±10, 25, 50, 100, 250, 500 mV; ±1, 2.5, 5, 10, 25, 50 V).

• Thermocouple types J, K, T, B, R, S, E, and N are supported

• Two dedicated digital inputs for WINDAQ remote control operations (remote start/stop and remote events).

• Sample throughput rates up to 2 kHz maximum (for a single channel - 200 Hz with multiple channels) and as low

as 0.709 samples per hour.

• A push-button to tag insert event markers in WINDAQ software.

• Three status LEDs for easy notification of system status.

Analog Inputs

The DI-245 features four differential channel inputs located on the sixteen-position screw terminal blocks for easy

connection and operation (other terminals used for digital inputs). Each channel can be programmed to acquire data

as Voltage (ranges: ±10, 25, 50, 100, 250, 500 mV; ±1, 2.5, 5, 10, 25, 50 V) or Thermocouple temperature (types J,

K, T, B, R, S, E, and N are supported).

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

instruments.

Digital Inputs

The DI-245 contains two digital lines (bits) for WINDAQ remote control operations (Evnt/DI0 and Rcrd/DI1). Con-

nect switch closures or discrete levels with a maximum input of 30V and a threshold of 1.8V. The inputs float at 1

level, about 3.3V relative to the “-” terminal, and require sinking about 50uA to bring them down to 0.8V and guaran-

tee a 0.

Software

All software required to record and playback waveforms is included with the purchase of any DI-245 data acquisition

system via download.

WINDAQ®Recording and Playback Software

WINDAQ Acquisition and WINDAQ Waveform Browser allow you to record and play back data acquired through

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

from our web site (www.dataq.com).

DI-245 Hardware Manual

Introduction

WINDAQ Data Acquisition software (free) can be used to record waveforms directly and continuously to disk while

monitoring a real-time display of the waveforms on-screen.

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

acquired waveforms. Use the built-in data file translator to display multiple waveforms acquired by WINDAQ Acqui-

sition software. The software’s disk-streaming design allows data files of any length to be graphically displayed rap-

idly, 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.

The DATAQ Instruments Hardware Manager

Find the DATAQ Instruments Hardware Manager in the Start menu under the WINDAQ program group called

DATAQ Instruments Hardware Manager. Access WINDAQ Acquisition software and manage multiple DATAQ

Instruments devices in this easy-to-use point and click environment. Click on “View Help” in the “Help” menu or

press the F1 key on your keyboard to access the help documentation.

Help

All WINDAQ software utilizes context-sensitive help. Help may be accessed through the Help menu or by pressing

the F1 key with any pull-down menu item selected. This will take you directly to the Help topic most relevant to that

particular function or feature. Help topics discuss in detail each function available in the software.

DI-245 Hardware Manual

Specifications

2. Specifications

Analog Inputs

Number of Channels: 4

Channel Configuration: Differential, Isolated

Programmable measurements per channel: Voltage, Thermocouple

Programmable thermocouple types and measure-

ment range per channel:

Over 25 ±3 °C ambient temperature range.

Stable ambient temperature.

Following 30 minutes warm-up.

Excluding common mode error.

Excluding thermocouple error.

TC Type Temperature Measure-

ment range (°C)

Accuracy (°C)

J -190 to 1200 ±(0.1% of span + 2)

K -180 to 1360

T -190 to 400 ±(0.1% of span + 1)

B600 to 1000 ±(0.2% of span + 4)

1001 to 1810 ±(0.1% of span + 3)

R-40 to 300 ±(0.2% of span + 6)

301 to 1760 ±(0.1% of span + 3)

S-40 to 400 ±(0.2% of span + 6)

401 to 1750 ±(0.1% of span + 3)

E -160 to 990 ±(0.1% of span + 1)

-170 to 50 ±(0.1% of span + 3)

51 to 1290 ±(0.1% of span + 1)

Programmable voltage measurements ranges per

channel:

At 25 °C ambient temperature.

Following 30 minutes warm-up.

Excluding common mode error.

Range (±) Accuracy

10 mV

±(0.05% of range + 10 µV)

25 mV

50 mV

100 mV

250 mV

500 mV

1 V

2.5 V

5 V

10 V

25 V

50 V

Input impedance: 1 M all ranges

Isolation: Input-to-output, Channel-to-channel

DI-245 Hardware Manual

Specifications

Absolute max input without damage: 120 Vrms

Maximum common mode voltage: 120 Vrms

Minimum common mode rejection (330



unbalance):

>110 db (DC to 60 Hz)

Channel-to-channel crosstalk rejection:

(Rsource ≤ 330 Ω; Freqsource ≤ 60 Hz)

> 100 db

Digital Inputs

Number of channels: 2

Pull-up value: 47 K

Isolation: None

Input high voltage threshold: 1.80 V minimum

Input low voltage threshold: 1.40 V maximum

Absolute maximum input without damage: ±30 V peak

ADC Characteristics

Voltage measurement resolution: Range (±) Resolution Units

10 mV 1.22

V

25 mV 3.05

50 mV 6.10

100 mV 12.20

250 mV 30.52

500 mV 61.04

1 V 122.07

2.5 V 305.18

5 V 610.35

10 V 1.22

25 V 3.05

50 V 6.10

Minimum temperature measurement resolution: TC Type Resolution Units

J 0.086

°C

K 0.096

T 0.037

B 0.096

R/S 0.111

E 0.073

N 0.092

Indice

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