Dataq DI-1000TC Manuale utente

The way PC-based instrumentation should be

DI-1000TC

Instrumentation Modules for Temperature Measurements

User's Manual

Manual Revision M

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.

241 Springside Drive

Akron, Ohio 44333, USA

Telephone: 330-668-1444

Fax: 330-666-5434

Designed and manufactured in the

United States of America

M-100774

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 one 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.

DI–1000TC User Manual

Table of Contents

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

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

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

Thermocouple Inputs ......................................................................................................................... 1

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

Signal Connections ............................................................................................................................ 3

Scanning Characteristics .................................................................................................................... 3

Expansion Capabilities ...................................................................................................................... 3

Max. Sample Rate from Expansion ................................................................................................... 4

Calibration ......................................................................................................................................... 4

RS-422 Interface ................................................................................................................................ 4

General ............................................................................................................................................... 4

3. Getting Started ................................................................................................................................... 5

Unpacking .......................................................................................................................................... 5

Applying Power to the DI-1000TC Instrument ................................................................................. 5

Connecting the DI-1000TC Instrument to your Computer ............................................................... 5

RS-422 Interface Port Pin Out ........................................................................................................... 6

Adapters ............................................................................................................................................. 6

DI-1000TC Instrument Controls and Indicators ................................................................................ 6

DI-1000TC Instrument Front Panel 6

DI-1000TC Instrument Rear Panel 7

Installing the Software ....................................................................................................................... 7

DI-1000-232-F Installation 7

DI-1000-USB Installation 8

Installing Multiple Devices in a Daisy Chain .................................................................................... 10

4. Module Configuration Software ....................................................................................................... 13

Setting up Addresses for Your Devices ............................................................................................. 13

Calibration ......................................................................................................................................... 14

5. WinDaq® Software ............................................................................................................................ 15

Sample Rate ....................................................................................................................................... 15

Channel Settings ................................................................................................................................ 16

Channels ............................................................................................................................................ 17

User Annotation ................................................................................................................................. 18

DI–1000TC User Manual

Introduction

1. Introduction

Congratulations on your purchase of a DI-1000TC data acquisition instrument for Thermocouple measurements.

This manual is written with the assumption that you have a general understanding of data acquisition, digital I/O and

DSP operations, and that you possess enough proficiency in software to write your own application and/or diagnostic

programs.

Features

The DI-1000TC provides the following features:

• Expandable: Up to 8 DI-1000TC units (64 channels max) may be daisy-chained together to form one distributed

synchronous data acquisition system.

• Built-in RS-422 Interface: This allows DI-1000TC units to connect to any host PC through an inexpensive

adapter via an RS-232 or USB port. This RS-422 interface also serves as an expansion port for other DI-1000

Series instruments.

• Isolation: The DI-1000TC's 1000VDC and Peak AC input-to-output and channel-to-channel isolation allows

grounded TC measurements.

• High Accuracy and Resolution Design: Allows sharpened decisions with an overall accuracy of ±0.2% of span,

and temperature resolution as fine as 0.08°C.

• Portable: The DI-1000TC is provided in a small (13.81D × 10.48W × 3.81H centimeters; 5-7/16D × 4-1/8W × 1-

1/2H inches) enclosure consisting of an aluminum base and all-steel wraparound.

The following provides a brief overview of the major subsystems of the DI-1000TC Series.

Thermocouple Inputs

Depending on the model of DI-1000TC you purchased, you will have either 4 or 8 thermocouple inputs. Each input

channel may be configured in software to support one of seven thermocouple types: J, K, T, E, S, B, or R. Tempera-

ture measurements may range from -200°C to +1820°C (-328°F to +3308°F), depending upon thermocouple type.

Each DI-1000TC thermocouple channel features a panel-mounted, miniature spade connector, and all input channels

are electrically isolated from ground and each other up to 1000VDC, or peak AC.

DI–1000TC User Manual

Specifications

2. Specifications

Signal Connections

The DI-1000TC units are provided in 4- or 8-channel versions. Each thermocouple channel features a panel-

mounted, miniature spade connector, and all input channels are electrically isolated from ground and each other up to

1000VDC, or peak AC.

Scanning Characteristics

Expansion Capabilities

Number of channels: Configurable as 4- or 8-channel modules within one enclosure

Supported Thermocouple Types: J, K, T, E, S, B, R, mix and match as required

Thermocouple Input Connectors: Panel-mounted miniature spade, universal TC-type

Open TC detection: An open thermocouple forces the channel to minus full scale

Cold Junction Sensors: One for every group of 4 or 8 channels, depending upon configuration

Cold Junction Compensation Range: -40 to 80°C

Linearization: Accomplished transparently by the software driver to deliver scaled tem-

perature values to the host program.

Input Impedance: >1M

Input Bias Current: 50pA

Input Offset Voltage: <5 V

Maximum Normal Mode Voltage: 250 VDC/Peak AC momentary; 50 VDC/Peak AC continuous

Maximum Common Mode Voltage: 1000 VDC or Peak AC

Common Mode Rejection: >160db @ 50 and 60Hz

Channel-to-Channel Isolation: 1000 VDC or Peak AC

Input-to-Output Isolation: 1000 VDC or Peak AC

Channel-to-Channel Crosstalk Rejection: >160db

Temperature Coefficient: <0.04 V/°C

Digital Filtering: 128-tap comb filter per channel, decimating

Voltage Range: 60mV full scale

Sample Rate: 5 samples/second/channel, fixed

Scan List: 9-position, 8 positions may be programmed for channel number and TC type; ninth position re-

served for CJC access

Sample Buffer: 18 samples max.

Method: Via integral RS-422 port to other DI-1000 Series Modules

DI–1000TC User Manual

Specifications

Max. Sample Rate from Expansion

Calibration

RS-422 Interface

General

Units: 5 samples/second/channel

Maximum Distance: 4,000 feet

Calibration Cycle: One year

Calibration Method: Calibration constants are stored within each module's EEPROM. Provided calibration soft-

ware to automate calibration in the field.

Supported Baud Rates: 4800, 9600 (default), 19200, 38400, 56800, 115200

Data Bits: 8

Stop Bits: 1

Parity: None

Protocol: ModBus ASCII

Connector: RJ-45

Pinout is as follows: 1 Receive (+)

2 Receive (-)

3 XMIT (-)

6 XMIT (+)

8 GND

Panel Indicators: Power and Active LEDs

Operating Environment: 40 to +80°C

Enclosure: Aluminum base with steel wraparound. Aluminum end-panels with plastic bezels.

Dimensions: 5-7/16D × 4-1/8W × 1-1/2H inches

13.81D × 10.48W × 3.81H centimeters

Weight: 14 oz. (four channels), 17 oz. (eight channels)

Power Requirements: 9 to 36 VDC, 1 watt

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