Meilhaus Electronic RedLab TEMP Bedienungsanleitung

RedLab TEMP

USB-based High-Precision 8-Channel

Temperature Measurement Module

User's Guide

Document Revision 1.5E, April, 2014

Imprint

User’s Guide RedLab® Series

Document Revision 1.5E

Revision Date: April 2014

Meilhaus Electronic GmbH

Am Sonnenlicht 2

D-82239 Alling near Munich, Germany

http://www.meilhaus.de

transmitted, in any form by any means, electronic, mechanical, by photocopying, recording, or

otherwise without the prior written permission of Meilhaus Electronic GmbH.

Important note:

All the information included in this user’s guide were put together with utmost care and to best

knowledge. However, mistakes may not have been erased completely.

For this reason, the firm Meilhaus Electronic GmbH feels obliged to point out that they cannot be take

on neither any warranty (apart from the claims for warranty as agreed) nor legal responsibility or

liability for consequences caused by incorrect instructions.

We would appreciate it if you inform us about any possible mistakes.

The trademark Personal Measurement Device, TracerDAQ, Universal Library, InstaCal, Harsh

Environment Warranty, Measurement Computing Corporation, and the Measurement Computing logo

are either trademarks or registered trademarks of Measurement Computing Corporation.

Windows, Microsoft, and Visual Studio are either trademarks or registered trademarks of Microsoft

Corporation.

LabVIEW is a trademark of National Instruments.

CompactFlash is a registered trademark of SanDisk Corporation.

XBee is a trademark of MaxStream, Inc.

All other trademarks are the property of their respective owners.

Table of Contents

Preface

About this User’s Guide .......................................................................................................................6

What you will learn from this user’s guide.........................................................................................................6

Conventions in this user’s guide.........................................................................................................................6

Where to find more information .........................................................................................................................6

Chapter 1

Introducing the RedLab TEMP.............................................................................................................7

Overview: RedLab TEMP features.....................................................................................................................7

RedLab TEMP block diagram............................................................................................................................8

Software features ................................................................................................................................................8

Connecting a RedLab TEMP to your computer is easy......................................................................................9

Chapter 2

Installing the RedLab TEMP...............................................................................................................10

What comes with your RedLab TEMP shipment? ...........................................................................................10

Hardware .........................................................................................................................................................................10

Additional documentation................................................................................................................................................10

Unpacking the RedLab TEMP..........................................................................................................................10

Installing the software ......................................................................................................................................11

Installing the RedLab TEMP ............................................................................................................................11

Configuring the RedLab TEMP........................................................................................................................12

Calibrating the RedLab TEMP .........................................................................................................................12

Chapter 3

Sensor Connections ...........................................................................................................................13

Screw terminal pin out......................................................................................................................................13

Sensor input terminals (C0H/C0L to C7H/C7L)..............................................................................................................14

Current excitation output terminals (±I1 to ±I4) ..............................................................................................................15

Four-wire, two sensor common terminals (4W01 to 4W67)............................................................................................15

Two sensor common terminals (IC01 to IC67)................................................................................................................15

Ground terminals (GND) .................................................................................................................................................15

Power terminals (+5V).....................................................................................................................................................15

Digital terminals (DIO0 to DIO7)....................................................................................................................................15

CJC sensors......................................................................................................................................................................15

Thermocouple connections...............................................................................................................................15

Wiring configuration........................................................................................................................................................15

RTD and thermistor connections......................................................................................................................16

Two-wire configuration ...................................................................................................................................................17

Three-wire configuration .................................................................................................................................................18

Four-wire configuration...................................................................................................................................................18

Semiconductor sensor measurements ...............................................................................................................20

Wiring configuration........................................................................................................................................................20

Digital I/O connections.....................................................................................................................................21

Chapter 4

Functional Details ...............................................................................................................................22

Thermocouple measurements ...........................................................................................................................22

Cold junction compensation (CJC) ..................................................................................................................................22

Data linearization.............................................................................................................................................................22

Open-thermocouple detection (OTD) ..............................................................................................................................22

RTD and thermistor measurements ..................................................................................................................23

Data linearization.............................................................................................................................................................23

USB connector..................................................................................................................................................23

RedLab TEMP User's Guide

LED ..................................................................................................................................................................23

Power................................................................................................................................................................24

Chapter 5

Specifications......................................................................................................................................25

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

Channel configurations.....................................................................................................................................26

Compatible sensors...........................................................................................................................................26

Accuracy...........................................................................................................................................................27

Thermocouple measurement accuracy .............................................................................................................................27

Semiconductor sensor measurement accuracy .................................................................................................................28

RTD measurement accuracy ............................................................................................................................................28

Thermistor measurement accuracy ..................................................................................................................................28

Throughput rate ................................................................................................................................................29

Digital input/output...........................................................................................................................................30

Memory ............................................................................................................................................................30

Microcontroller.................................................................................................................................................30

USB +5V voltage .............................................................................................................................................30

Power................................................................................................................................................................31

USB specifications ...........................................................................................................................................31

Current excitation outputs (Ix+) .......................................................................................................................32

Environmental ..................................................................................................................................................32

Mechanical .......................................................................................................................................................32

Screw terminal connector type and pin out.......................................................................................................32

Screw terminal pin out.....................................................................................................................................................33

Preface

About this User’s Guide

What you will learn from this user’s guide

This user’s guide explains how to install, configure, and use the RedLab TEMP so that you get the most out of

its USB-based temperature measurement 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 additional information and helpful hints related to the subject 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 InstaCal installation procedure is explained in the Quick Start Guide.

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

Where to find more information

The following electronic documents provide helpful information relevant to the operation of the RedLab TEMP.

The Quick Start Guide is available on our RedLab CD in the root directory.

The Guide to Signal Connections is available on our RedLab CD under „ICalUL\Documents“.

The Universal Library User's Guide is available on our RedLab CD under „ICalUL\Documents“.

The Universal Library Function Reference is available on our RedLab CD under „ICalUL\Documents“.

The Universal Library for LabVIEW™User’s Guide is available on our RedLab CD under

„ICalUL\Documents“.

Chapter 1

Introducing the RedLab TEMP

Overview: RedLab TEMP features

This user's guide contains all of the information you need to connect the RedLab TEMP to your computer and

to the signals you want to measure.

The RedLab TEMP is a USB 2.0 full-speed, temperature measurement module that is supported under popular

Microsoft®Windows®operating systems. The RedLab TEMP is fully compatible with both USB 1.1 and USB

2.0 ports.

The RedLab TEMP provides eight differential input channels that are software programmable for different

sensor categories including thermocouple, RTDs, thermistors and Semiconductor sensors. Eight independent,

TTL-compatible digital I/O channels are provided to monitor TTL-level inputs, communicate with external

devices, and to generate alarms. The digital I/O channels are software programmable for input or output.

With the RedLab TEMP, you can take measurements from four sensor categories:

Thermocouple – types J, K, R, S, T, N, E, and B

Resistance temperature detectors (RTDs) – 2, 3, or 4-wire measurements of 100 Ωplatinum RTDs

Thermistors – 2, 3, or 4-wire measurements

Semiconductor temperature sensors – LM36 or equivalent

The RedLab TEMP provides a 24-bit analog-to-digital (A/D) converter for each pair of differential analog input

channels. Each pair of differential inputs constitutes a channel pair.

You can connect a different category of sensor to each channel pair, but you can not mix categories among the

channels that constitute a channel pair (although it is permissible to mix thermocouple types).

The RedLab TEMP provides two integrated cold junction compensation (CJC) sensors for thermocouple

measurements, and built-in current excitation sources for resistive sensor measurements.

An open thermocouple detection feature lets you detect a broken thermocouple. An on-board microprocessor

automatically linearizes the measurement data according to the sensor category.

The RedLab TEMP is a standalone plug-and-play module which draws power from the USB cable. No external

power supply is required. All configurable options are software programmable.

The RedLab TEMP is fully software calibrated.

RedLab TEMP User's Guide Introducing the RedLab TEMP

RedLab TEMP block diagram

RedLab TEMP functions are illustrated in the block diagram shown here.

24-bit A/D

(CH0, CH1)

Input

mux.

Input

mux.

CJC

CH0-3

±Ix

Precision

5V Ref.

24-bit A/D

(CH2, CH3)

±Ix

24-bit A/D

(CH4, CH5)

Input

mux.

Input

mux.

CJC

CH4-7

±Ix

24-bit A/D

(CH6, CH7)

±Ix

Screw TerminalScrew Terminal

Isolated

Micro

Temp

sensor

I/O

Isolator

500 V

Isolation

Barrier

SPI

Isolated

DC/DC

USB

+5V

(+12)

(-12)

DIO

USB 2.0

Microcontroller

USB

(PC)

Figure 1. RedLab TEMP functional block diagram

Software features

For information on the features of InstaCal and the other software included with your RedLab TEMP, refer to

the Quick Start Guide that shipped with your device. The Quick Start Guide is also available in PDF on our

RedLab CD (root directory).

RedLab TEMP User's Guide Introducing the RedLab TEMP

Connecting a RedLab TEMP to your computer is easy

Installing a data acquisition device has never been easier.

The RedLab TEMP relies upon the Microsoft Human Interface Device (HID) class drivers. The HID class

drivers ship with every copy of Windows that is designed to work with USB ports. We use the Microsoft

HID because it is a standard, and its performance delivers full control and maximizes data transfer rates for

your RedLab TEMP. No third-party device driver is required.

The RedLab TEMP is plug-and-play. There are no jumpers to position, DIP switches to set, or interrupts to

configure.

You can connect the RedLab TEMP before or after you install the software, and without powering down

your computer first. When you connect an HID to your system, your computer automatically detects it and

configures the necessary software. You can connect and power multiple HID peripherals to your system

using a USB hub.

You can connect your system to various devices using a standard four-wire cable. The USB connector

replaces the serial and parallel port connectors with one standardized plug and port combination.

You do not need a separate power supply module. The USB automatically delivers the electrical power

required by each peripheral connected to your system.

Data can flow two ways between a computer and peripheral over USB connections.

Chapter 2

Installing the RedLab TEMP

What comes with your RedLab TEMP shipment?

The following items are shipped with the RedLab TEMP.

Hardware

RedLab TEMP

USB cable (2 meter length)

Additional documentation

In addition to this hardware user's guide, you should also receive the Quick Start Guide (available on our

RedLab CD (root directory)). This booklet supplies a brief description of the software you received with your

RedLab TEMP and information regarding installation of that software. Please read this booklet completely

before installing any software or hardware.

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