Accurate Position Measurement at Varying Temperatures
|
|
- Gabriel York
- 5 years ago
- Views:
Transcription
1 T E C H N I C A L W H I T E P A P E R Accurate Position Measurement at Varying Temperatures Author: Darran Kreit, Technical Manager, Zettlex UK Ltd File ref: technical articles/accurate position measurement at varying temps_rev2.0 w w w. z e t t l e x. c o m
2 Introduction Measuring position in a laboratory is usually carried out at a constant temperature to ensure accuracy, but some specifications require accurate position measurement over a wide range of operating temperatures. This is a much tougher challenge. This technical white paper discusses some of the issues and suggests 10 helpful hints for design engineers. Understanding the Problem The first step in designing for accurate position measurement over wide temperature ranges is to be clear about what is required. This may seem obvious, but there are plenty of engineers who still say: it has to be pretty accurate, even when it s fairly hot or quite cold but not cost too much. The main data requirements are: Max. & min. operating temperatures Max. & min. storage temperatures Max. permissible measurement error at the various operating temperatures. Tip #1 be clear about what the real requirements are. T E C H N I C A L W H I T E P A P E R / 1
3 In considering the technical solution to any requirement, there should be two realistic budgets: a cost budget and an error budget. The Error Budget The difference between true and measured position will comprise several different errors. Together, this is referred to as the error budget, which typically comprises: Errors from the position sensor s (less than perfect) measurement performance. Thermal drift in the sensor s output. Mechanical effects from clearances in couplings or bearings, backlash in gears, etc. Thermal effects in the host mechanical structure, notably from differential thermal expansion. Tip #2 prepare an error budget & ensure all contributing factors are considered. Understanding Measurement Performance In theory, all sensors have datasheets that clearly state measurement performance. In practice, this is not so. Sensor manufacturers often use specmanship to promote the strengths of their products and to hide the weaknesses. So, let s clarify the main parameters relating to a position sensor s measurement performance: Accuracy refers to its veracity or maximum error from true position. Resolution refers to the smallest change in position that it can measure. Repeatability (or precision) refers to its degree of reproducibility. Linearity refers to how well its output over a range matches a straight line. In many instances, Linearity and Accuracy are the same if there is no offset. If position is to be measured during motion, then the dynamic errors due to the time difference between the sensor s output and reality should also be included. A common mistake in angle sensors, which are specified in cpr or ppr (counts or pulses per rev), is the assumption that a 1000cpr sensor is accurate to 1/1000 th of a rev. Make sure you read and understand - the small print of the sensor s datasheet. You may be unpleasantly surprised. If you simply buy the most accurate sensor that you can find, it s likely that you will be paying over the odds. In many cases, resolution and repeatability are the key factors T E C H N I C A L W H I T E P A P E R / 2
4 not necessarily accuracy. This can make a huge difference to the price you will pay for a sensor. Tip #3 - understand what aspects of measurement performance are important in your application and ensure the sensing system aligns with these requirements. Temperature Coefficient Whenever measurement performance parameters are stated they should be specified at a temperature along with a temperature coefficient. This coefficient refers to the change in the sensor s output as temperature varies. A small temperature coefficient means a thermally stable device. Typically, temperature coefficients are stated in parts per million per Kelvin. This is an unfortunate unit as it is usually a very small number and often ignored. The snag is that this tiny number has to be multiplied by the temperature differential. A seemingly ideal sensor at 20 O C may not be good enough when the temperature reaches 120 O C. Tip #4 make sure your error budget includes the sensor s temperature coefficient. Differential Thermal & Mechanical Effects Typically, it is not the sensor s elements that are of interest but rather the position of the host s elements, such as the angle of a shaft or displacement of a piston. Of course, these will have their own contributions to the error budget caused by factors such as mechanical tolerances, backlash, clearances and thermal expansion. Thermal expansion is a natural phenomenon and one which should not be ignored. More problematic is differential thermal expansion and this can lead to significant measurement errors if its effects are not minimised by appropriate mechanical arrangements or material selection. If the sensor s mounting structure expands or contracts by the same amount as the components being measured, the effect of thermal expansion can be negated. Ideally, the sensor s thermal coefficient either matches the effects of thermal expansion. In many T E C H N I C A L W H I T E P A P E R / 3
5 cases, the sensor s mechanical arrangement relative to the host equipment means that differential thermal expansion has to be included in the error budget. In instances where this effect dominates the error budget, there is always the option for temperature compensation. This requires the local temperature to be measured and the output from the sensor to be compensated accordingly. This is undesirable as temperature is unlikely to be uniform; there will be temperature/time lags; there is an increase in cost and complexity and so a reduction in reliability. Tip #5 Mechanical effects & differential thermal expansion must be included in any error budget. Wherever possible, these should be minimised through careful mechanical arrangement and material selection. Choosing the right sensor A position sensor s fundamental physics generally determines how big its temperature coefficient is. A basic understanding helps in choosing the right sensor for the job. Some of the common principles used to measure position are: Potentiometers: measure resistance of an electrically conductive material. Since conductivity varies with temperature, coefficients are likely to be large. Optical: transmission of light is largely independent of temperature but the associated electronics suffer from thermal drift and most optical sensors have a narrow operating temperature range. Furthermore, many optical sensors notably ring & kit forms - rely on tight installation tolerances and so are likely to suffer additional thermal effects at extreme temperatures. Magnetic (Hall): Hall Effect sensors measure field strength and magnetic properties vary with temperature, so thermal coefficients may be significant. Precision magnetic sensors also need tight installation tolerances so additional thermal effects may be large. Magnetic (Magnetostrictive): these devices measure the propagation of an energy pulse along a magnetostrictive strip to/from a magnet. Typically, thermal coefficients are relatively large. Capacitive: since capacitance changes a lot with temperature, many capacitive devices have large temperature coefficients, which are further exacerbated by changes in humidity. In some instances, condensation or foreign matter on the sensing elements can have disastrous consequences. Inductive: inductance varies with temperature but most precision inductive sensors use a ratiometric technique based on the ratio of at least two inductances. Since the values of both will vary by similar amounts, thermal coefficients are typically low. T E C H N I C A L W H I T E P A P E R / 4
6 Tip #6 design the host system to minimise differential thermal expansion. Tip#7 - select a sensor with a small thermal coefficient or one whose temperature coefficient matches the host system. Traditional Inductive Sensors Typically, these sensors use transformer techniques with precision wound spools and they have become the automatic choice in the oil & gas, aerospace and military sectors, where there is often a wide temperature range. The basic physics means that they are ideally suited to difficult operating environments but they are not widely used due to their high cost, weight and bulk. Tip #8 it is no coincidence that inductive sensors are often an automatic choice for highreliability, harsh environment applications. New Generation Inductive Sensors A new generation of inductive sensor has entered the market in recent years and has a growing reputation, not only in the traditional markets, but also in industrial, aerospace, defence, medical, utility and scientific sectors. The new generation sensors use the same basic physics as the traditional ones, but rather than the bulky transformer constructions and complex analogue electronics, the new generation uses printed circuit boards and digital electronics. The approach is elegant and also opens up the range of applications for inductive sensors to include 2D & 3D sensors, short throw (<1mm) linear devices, curvilinear geometries and high precision angle encoders. Tip #9 if a traditional inductive sensor is too big, bulky, expensive or not sufficiently accurate, consider one of the new generation of inductive sensors. T E C H N I C A L W H I T E P A P E R / 5
7 Zettlex technology is the forerunner of this new technology and has grown over recent years thanks to some high profile design wins. As well as compact, lightweight, non-contact designs, a key factor is that these sensors offer extremely stable measurements over wide temperature ranges. The example shown below is an Incoder (inductive encoder) that offers a cost effective and more accurate alternative to traditional inductive devices such as resolvers. As can be seen in the diagram, such Incoders offer remarkably small temperature coefficients of <0,25ppm/K, which equates to less than one fifth of an arc-second per Celsius change. Tip #10 Inductive encoders offer especially low thermal coefficients. T E C H N I C A L W H I T E P A P E R / 6
8 Further Information / Contact For more information about Zettlex inductive position sensing technology, or to discuss your application with a position sensor expert, please contact Zettlex directly or speak with your nearest local representative. UK Head Office Zettlex UK Ltd Newton Court, Newton, Cambridge, CB22 7ZE, United Kingdom Sales Contacts: Mark Howard or Darran Kreit info@zettlex.com Telephone: Web: International Zettlex has a worldwide network of resellers and distributors. To find your local representative please visit T E C H N I C A L W H I T E P A P E R / 7
Inductive Versus Capacitive Position Sensors
T E C H N I C A L W H I T E P A P E R Inductive Versus Capacitive Position Sensors Author: Darran Kreit, Technical Manager, Zettlex UK Ltd File ref: technical articles/inductive vs. capacitive_rev2.0 w
More informationA Comparison of Inductive and Capacitive Position Sensors
T E C H N I C A L W H I T E P A P E R A Comparison of Inductive and Capacitive Position Sensors Author: Mark Howard, General Manager, Zettlex UK Ltd File ref: technical articles/inductive vs. capacitive_rev4.0
More informationControl Engineering BDA30703
Control Engineering BDA30703 Lecture 4: Transducers Prepared by: Ramhuzaini bin Abd. Rahman Expected Outcomes At the end of this lecture, students should be able to; 1) Explain a basic measurement system.
More informationCircuits for Analog System Design Prof. Gunashekaran M K Center for Electronics Design and Technology Indian Institute of Science, Bangalore
Circuits for Analog System Design Prof. Gunashekaran M K Center for Electronics Design and Technology Indian Institute of Science, Bangalore Lecture No. # 08 Temperature Indicator Design Using Op-amp Today,
More informationTantalum Through-Hole Capacitors Molded Radial T370 & T378 Micron MIL-PRF-49137/6 (CX06 Style) Applications
Overview The KEMET T370 and T378 Micron MIL-PRF-49137/6 (CX06 Style) capacitors are available in a variety of case styles and sizes. These capacitors are designed to operate from 55 C to +85 C at full
More informationCUSTOM RETICLE SOLUTIONS
CUSTOM RETICLE SOLUTIONS Special Micro Structures Pyser-SGI has over 60 years experience in producing high quality micro structure products. These products are supplied worldwide to industries including
More informationSensors: a) Gyroscope. Micro Electro-Mechanical (MEM) Gyroscopes: (MEM) Gyroscopes. Needs:
Sensors: Needs: Data redundancy Data for both situations: eclipse and sun Question of sampling frequency Location and size/weight Ability to resist to environment Low consumption Low price a) Gyroscope
More informationProcess Control and Instrumentation Prof. D. Sarkar Department of Chemical Engineering Indian Institute of Technology, Kharagpur
Process Control and Instrumentation Prof. D. Sarkar Department of Chemical Engineering Indian Institute of Technology, Kharagpur Lecture - 35 Instrumentation: General Principles of Measurement Systems
More informationcustom reticle solutions
custom reticle solutions 01 special micro structures Pyser Optics has over 60 years experience in producing high quality micro structure products. These products are supplied worldwide to industries including
More informationSmartec Pressure Sensor (bridge output)
DATASHEET Pressure sensor family 1/5 Smartec Pressure Sensor (bridge output) Features * Commercial grade * DIP version for high volume production * Gauge or absolute pressure * Resistive bridge technology
More informationSTRAIN GAUGES YEDITEPE UNIVERSITY DEPARTMENT OF MECHANICAL ENGINEERING
STRAIN GAUGES YEDITEPE UNIVERSITY DEPARTMENT OF MECHANICAL ENGINEERING 1 YEDITEPE UNIVERSITY ENGINEERING FACULTY MECHANICAL ENGINEERING LABORATORY 1. Objective: Strain Gauges Know how the change in resistance
More informationCopyright 2017 by Select Calibration Inc. All rights reserved. Temperature Compensation
Copyright 2017 by Select Calibration Inc. All rights reserved. Temperature Compensation Table of Contents Introduction... 3 Why 20 C... 3 References... 3 Practical CMM Environments...4 CMM Construction
More informationSTATIC GAS MONITOR Type SGM/DEW Revision A of 20 aprile 2016
APPLICATIONS Moisture monitoring of air or gas (SF6) Suitable for indoor or outdoor Industrial, medical or aerospace fields HIGHLIGHTS High voltage circuit breakers commonly used for distribution and transmission
More information3URGXFWLQIRUPDWLRQ 5HVHUYDWLRQRISURSHUW\ULJKWV
3URGXFWLQIRUPDWLRQ +\URSKLO Š '7W\SH 5HVHUYDWLRQRISURSHUW\ULKWV 7KHFRQWHQWRIWKLVGRFXPHQWLVWKHLQWHOOHFWXDOSURSHUW\RI%$57(&DQGPXVWQHLWKHUEHFRSLHGQRUPDGHDYDLO DEOHWRWKLUGSDUWLHVQRWHYHQLQH[WUDFWVZLWKRXWRXUH[SUHVVDSSURYDOLQZULWLQ$Q\LQIULQHPHQWZLOOUHVXOWLQD
More informationFor the electronic measurement of current: DC, AC, pulsed..., with galvanic separation between the primary and the secondary circuit.
Current Transducer LDSR 0.3-TP/SP1 I P R N = 300 ma For the electronic measurement of current: DC, AC, pulsed..., with galvanic separation between the primary and the secondary circuit. Features Closed
More informationPrecision Ball Screw/Spline
58-2E Models BNS-A, BNS, NS-A and NS Seal Outer ring Shim plate Seal Spline nut Seal Collar Shim plate Seal End cap Ball Outer ring Ball screw nut Outer ring Ball Retainer Retainer Outer ring Point of
More informationFor the electronic measurement of current: DC, AC, pulsed..., with galvanic separation between the primary and the secondary circuit.
Current Transducer HO-NP series I P N = 4, 6, 12, 15 A Ref: HO 4-NP, HO 6-NP, HO 12-NP, HO 15-NP For the electronic measurement of current: DC, AC, pulsed..., with galvanic separation between the primary
More information2.1. Accuracy, n- how close the indication of the thermometer is to the true value.
AASHTO Accreditation Policy and Guidance on Thermometer Selection and Records Revised: January 25, 2018 Revision #: 0 1. Objective 1.1. The purpose of this document is to clearly define acceptance criteria
More informationCatalytic bead sensors are used primarily to detect
Chapter 3 Catalytic Combustible Gas Sensors Catalytic bead sensors are used primarily to detect combustible gases. They have been in use for more than 50 years. Initially, these sensors were used for monitoring
More information4/3/2019. Advanced Measurement Systems and Sensors. Dr. Ibrahim Al-Naimi. Chapter one. Introduction to Measurement Systems
Advanced Measurement Systems and Sensors Dr. Ibrahim Al-Naimi Chapter one Introduction to Measurement Systems 1 Outlines Control and measurement systems Transducer/sensor definition and classifications
More informationTemperature. 3
Temperature In 1848, Sir William Thomson (Lord Kelvin) stated the zero principle of dynamics. This principle enabled him to define thermodynamic temperature and to establish an objective method of measuring
More informationWind Speed & Direction Sensors
Wind Speed & Direction Sensors gillinstruments.com Gill Instruments has over twenty-five years experience in air flow measurement using ultrasonic technology and is a world leader in the field of wind
More informationLCR Series Circuits. AC Theory. Introduction to LCR Series Circuits. Module. What you'll learn in Module 9. Module 9 Introduction
Module 9 AC Theory LCR Series Circuits Introduction to LCR Series Circuits What you'll learn in Module 9. Module 9 Introduction Introduction to LCR Series Circuits. Section 9.1 LCR Series Circuits. Amazing
More informationAutomatic Control Systems. -Lecture Note 15-
-Lecture Note 15- Modeling of Physical Systems 5 1/52 AC Motors AC Motors Classification i) Induction Motor (Asynchronous Motor) ii) Synchronous Motor 2/52 Advantages of AC Motors i) Cost-effective ii)
More informationUnit 57: Mechatronic System
Unit 57: Mechatronic System Unit code: F/60/46 QCF level: 4 Credit value: 5 OUTCOME 2 TUTORIAL 2 - SENSOR TECHNOLOGIES 2 Understand electro-mechanical models and components in mechatronic systems and products
More informationCMM Uncertainty Budget
Table of Contents Purpose...3 Scope...3 Measurement Example...3 Uncertainty Groups...4 Probe Group...5 Calibration Artifact Group...6 Environment Group...7 CMM Group...8 Part Group...10 Conversion of Potential
More informationISOCON-6. 24V AC or DC POWERED ISOLATING SIGNAL CONVERTER
ISOCON-6 24V AC or DC POWERED ISOLATING SIGNAL CONVERTER Whilst every effort has been taken to ensure the accuracy of this document, we accept no responsibility for damage, injury, loss or expense resulting
More informationSmall, Gauge Pressure Sensor
Small, Gauge Pressure Sensor SM5G-GG Series FEATURES Improved stability with integrated field shields Small SO8 surface-mount package 90 millivolt output Constant current or constant voltage drive Ported
More information(NE) Low Ohmic Value Ultra Precision Resistors
Version: March 1, 2017 Electronics Tech. (NE) Low Ohmic Value Ultra Precision Resistors Web: www.direct-token.com Email: rfq@direct-token.com Direct Electronics Industry Co., Ltd. China: 12F, Zhong Xing
More informationCritical parameters of
Critical parameters of superconductors 2005-03-30 Why do this experiment? Superconductivity is a very interesting property from both commercial and basic scientific points of view. Superconductors are
More informationTurbine Meter TRZ 03 PRODUCT INFORMATION. Reliable Measurement of Gas
Turbine Meter TRZ 0 PRODUCT INFORMATION Reliable Measurement of Gas TURBINE METER TRZ 0 Method of operation, Construction Method of operation The TRZ 0 turbine meter is a flow meter suitable for gas measurement
More informationMeasurements in Mechatronic design. Transducers
Measurements in Mechatronic design Transducers Quantities Current Voltage Torque Force Magnetic flux Distance Temperature Measurement system Physical quanties Transducer Signal conditioning Measurement
More informationLM135 LM235 LM335 LM135A LM235A LM335A Precision Temperature Sensors
LM135 LM235 LM335 LM135A LM235A LM335A Precision Temperature Sensors General Description The LM135 series are precision easily-calibrated integrated circuit temperature sensors Operating as a 2-terminal
More informationCBT-140 White LEDs. CBT-140 Product Datasheet. Features: Table of Contents. Applications
CBT-140 White LEDs Features: Table of Contents Technology Overview...2 Test Specifications...2 Binning Structure...3 Chromaticity Bins...4 Product Shipping & Labeling Information...7 Electrical Characteristics...
More informationProf. S.K. Saha. Sensors 1. Lecture 5 June 11, Prof. S.K. Saha. Purpose Classification Internal Sensors. External Sensors.
Lecture 5 June 11, 2009 Sensors Prof. S.K. Saha Dept. of Mech. Eng. IIT Delhi Announcement Outlines of slides in Lectures 1-4 on May 15, 18, 21, June 01, 2009, respectively, are available from: http://web.iitd.ac.in/~saha/
More informationSmall Gage Pressure Sensor
Small Gage Pressure Sensor FEATURES Improved stability with integrated field shields Small SO8 surface-mount package 90 millivolt output Constant current or constant voltage drive Ported configuration
More informationMetallized Polyester Film Capacitors (MKT-S)
Metallized Polyester Film Capacitors (MKT-S) Series/Type: B32538 The following products presented in this data sheet are being withdrawn. Ordering Code Substitute Product Date of Withdrawal Deadline Last
More informationPhysics 208 Final Exam
Physics 208 Final Exam Name You are graded on your work, with partial credit. See the last pages of the exam for formula sheets. Please be clear and well-organized, so that we can easily follow each step
More informationElectro - Principles I
Electro - Principles I Capacitance The Capacitor What is it? Page 8-1 The capacitor is a device consisting essentially of two conducting surfaces separated by an insulating material. + Schematic Symbol
More informationIMPROVED PRODUCT Z, Z (Z-Foil)
Bulk Metal Foil Technology Ultra High Precision Z-Foil Voltage Divider Resistors with TCR Tracking to 0. ppm/ C, Power Coefficient Tracking of 5 ppm at Rated Power, and Tolerance Match to 0.005 % (50 ppm)
More informationENVR 416 Aerosol Technology - Laboratory Session Fall 2007
ENVR 416 Aerosol Technology - Laboratory Session Fall 2007 CALIBRATION AND USE OF THE OPTICAL MICROSCOPE The objective of this lab is for you to become familiar with use of the optical microscope to measure
More informationPOWER DISTRIBUTION SYSTEM Calculating PDS Impedance Douglas Brooks Ultracad Design, Inc
POWER DISTRIBUTION SYSTEM Calculating PDS Impedance Douglas Brooks Ultracad Design, Inc On a PCB (Printed Circuit Board) the Power Distribution System (PDS) is the system that distributes power from the
More informationSurveying Instruments. B Series B20 B30 B40. Automatic Levels
Surveying Instruments B Series B20 B30 B40 Automatic Levels World-Proven Precision and Durability B20 Automatic Level B30 Automatic Level B40 Automatic Level 28x 1.5mm Accuracy 32x 0.7mm Accuracy 24x 2.0mm
More informationRef: HLSR 16-PW; HLSR 32-PW; HLSR 40-PW-000; HLSR 50-PW-000,
Digital Current Transducer HLSR-PW series I P N = 16... 50 A Ref: HLSR 16-PW; HLSR 32-PW; HLSR 40-PW-000; HLSR 50-PW-000, Bitstream output from on onboard Sigma Delta modulator. For the electronic measurement
More informationFor the electronic measurement of current: DC, AC, pulsed..., with galvanic separation between the primary and the secondary circuit.
Current Transducer HO-NSM series I PN = 8, 15, 25 A Ref: HO 8-NSM, HO 15-NSM, HO 25-NSM For the electronic measurement of current: DC, AC, pulsed..., with galvanic separation between the primary and the
More informationFor the electronic measurement of current: DC, AC, pulsed..., with galvanic separation between the primary and the secondary circuit.
Current Transducer HO-NP/SP33 series I PN = 8, 15, 25 A Ref: HO 8-NP/SP33, HO 15-NP/SP33, HO 25-NP/SP33 For the electronic measurement of current: DC, AC, pulsed..., with galvanic separation between the
More informationChip tantalum capacitors (Fail-safe open structure type)
TCFG1C6M8R Chip tantalum capacitors (Fail-safe open structure type) TCFG Series Case Features 1) Safety design by open function built - in. 2) Wide capacitance range 3) Screening by thermal shock. Dimensions
More informationExperimentation. Third Edition. Wheeler. Ahmad R. Ganji. School of Engineering. With Third Edition contributions by. V. V. Krishnan. Brian S.
Introduction to Engineering Experimentation Third Edition Anthony J. Ahmad R. Wheeler Ganji School of Engineering San Francisco State University With Third Edition contributions by V. V. Krishnan San Francisco
More informationISO 844 INTERNATIONAL STANDARD. Rigid cellular plastics Determination of compression properties
INTERNATIONAL STANDARD ISO 844 Fifth edition 2007-04-15 Rigid cellular plastics Determination of compression properties Plastiques alvéolaires rigides Détermination des caractéristiques de compression
More informationLow Pressure Sensor Amplified Analog Output SM6295-BCM-S
Low Pressure Sensor Amplified Analog Output SM6295-BCM-S-040-000 FEATURES Pressure range from 0 to 40 cmh 2 O 5.0 V operation Amplified analog output (10 to 90%Vdd) Compensated temperature range: 0 to
More informationChip tantalum capacitors (Fail-safe open structure type)
TCFG0J106M8R Chip tantalum capacitors (Fail-safe open structure type) TCFG Series Case Features 1) Safety design by open function built - in. 2) Wide capacitance range 3) Screening by thermal shock. Dimensions
More informationOf all the physical properties, it is temperature, which is being measured most often.
1. Temperature 1.1 Introduction Of all the physical properties, it is temperature, which is being measured most often. Even the measurement of other physical properties,e.g. pressure, flow, level,, often
More informationEQ-730L Linear Hall IC
Distributed By: 9 Industrial Road, San Carlos, CA, 94070 USA GMW Associates PHONE: +1 60-802-8292 FAX: +1 60-802-8298 EMAIL: sales@gmw.com WEB: www.gmw.com EQ-70L Linear Hall IC Features Analog output
More information1) Thermo couple sensor
1) Thermo couple sensor Fundamental operation. In 1821 Mr. Seebeck found that if you connected 2 wires of different metals, a small Voltage would be generated, when this connection (junction) is heated.
More informationSignal to Noise Comparison of IS-Instruments Ltd High Throughput OEM Spectrometer and a Czerny Turner Instrument. July 2013
Signal to Noise Comparison of IS-Instruments Ltd High Throughput OEM Spectrometer and a Czerny Turner Instrument July 2013 EXECUTIVE SUMMARY IS-Instrument s new range of High Étendue Spectrometers (HES)
More informationWS-7211U Wireless 433 MHz Weather Station. Instruction Manual
WS-7211U Wireless 433 MHz Weather Station Instruction Manual TABLE OF CONTENTS Topic Page Quick Setup 3-5 Inventory of Contents 6-7 Detailed Setup Guide Battery Installation 7 Setting the Time 8 Features
More informationMeasurement of Temperature in the Plastics Industry
Sawi Mess- und Regeltechnik AG CH 8405 Winterthur-Gotzenwil, Switzerland Telephone +41 52 320 50 50, Fax +41 52 320 50 55 www.sawi.ch Measurement of Temperature in the Plastics Industry Johannes Wild,
More informationFrom this analogy you can deduce some rules that you should keep in mind during all your electronics work:
Resistors, Volt and Current Posted on April 4, 2008, by Ibrahim KAMAL, in General electronics, tagged In this article we will study the most basic component in electronics, the resistor and its interaction
More informationSensors and transducers
Sensors and transducers Measurement is an important subsystem of a mechatronics system. Its main function is to collect the information on system status and to feed it to the micro-processor(s) for controlling
More informationCover Page: Entropy Summary
Cover Page: Entropy Summary Heat goes where the ratio of heat to absolute temperature can increase. That ratio (Q/T) is used to define a quantity called entropy. The useful application of this idea shows
More informationCRYSTA-APEX C. The modular system for 3D CNC coordinate measurement in the production environment. Quick, versatile and high performing.
Coordinate Measuring Machines CRYSTA-APEX C The modular system for 3D CNC coordinate measurement in the production environment. Quick, versatile and high performing. Future-proofed high performance. CRYSTA-APEX
More informationWeatherHawk Weather Station Protocol
WeatherHawk Weather Station Protocol Purpose To log atmosphere data using a WeatherHawk TM weather station Overview A weather station is setup to measure and record atmospheric measurements at 15 minute
More informationThursday 29 June 2017 Morning Time allowed: 1 hour 30 minutes
Oxford Cambridge and RSA A Level Physics A H556/03 Unified physics Thursday 29 June 2017 Morning Time allowed: 1 hour 30 minutes *6830056239* You must have: The Data, Formulae and Relationship Booklet
More informationLow-Voltage Analog Temperature Sensors in SC70 and SOT23 Packages
19-2040; Rev 1; 6/01 Low-Voltage Analog Temperature Sensors General Description The precision, low-voltage, analog output temperature sensors are available in 5-pin SC70 and SOT23 packages. The devices
More informationGold nanoparticles from Innova Biosciences
Gold nanoparticles from Innova Biosciences A unique range of options Innova Biosciences Guide Innova Biosciences Ltd. Babraham Research Campus, Cambridge, UK, CB22 3AT +44 (0)1223 661000 info@innovabiosciences.com
More informationWhat Do You Think? Investigate GOALS. [Catch art: xxxxxxxxxxxxxxxxxx] Part A: Volume and Temperature of a Gas
Activity 4 Hot-Air Balloons [Catch art: xxxxxxxxxxxxxxxxxx] GOALS In this activity you will: Investigate the relationship between temperature and volume of a gas. Understand why the Kelvin scale is used
More informationSMD B EASV1003WA1. Applications Telecommunication: indicator and backlighting in telephone and fax. Flat backlight for LCD, switch and symbol.
SMD B Features Package in 8mm tape on 7 diameter reel. Compatible with automatic placement equipment. Compatible with infrared and vapor phase reflow solder process. Mono-color type. Pb-free. The product
More informationPHY3128 / PHYM203 (Electronics / Instrumentation) Transmission Lines
Transmission Lines Introduction A transmission line guides energy from one place to another. Optical fibres, waveguides, telephone lines and power cables are all electromagnetic transmission lines. are
More informationDetection of S pole Detection of N pole Active "L" Active "H" Nch open-drain output Nch driver built-in pull-up resistor. f C = 250 khz typ.
www.ablic.com www.ablicinc.com S-5732 B Series 125 C OPERATION HIGH-WITHSTAND VOLTAGE HIGH-SPEED UNIPOLAR DETECTION TYPE HALL EFFECT SWITCH IC ABLIC Inc., 2016-2017 Rev.2.1_02 This IC, developed by CMOS
More informationLUXEON Flash. power light source. Introduction
Technical Datasheet DS49 power light source LUXEON Flash Introduction LUXEON Flash is a family of ultra-compact light sources specifically designed and tested for use as a camera flash in space-constrained,
More informationDesign Considerations for a Variable Angle Absolute Reflectance Accessory For the LAMBDA 950/850/650 UV/Vis/NIR and UV/Vis Spectrophotometers
Design Considerations for a Variable Angle Absolute Reflectance Accessory For the LAMBDA 950/850/650 UV/Vis/NIR and UV/Vis Spectrophotometers UV/VIS AND UV/VIS/NIR SPECTROSCOPY A P P L I C A T I O N N
More informationME 515 Mechatronics. Overview of Computer based Control System
ME 515 Mechatronics Introduction to Sensors I Asanga Ratnaweera Department of Faculty of Engineering University of Peradeniya Tel: 081239 (3627) Email: asangar@pdn.ac.lk Overview of Computer based Control
More information14:1400 (0206) KRAL Volumeter - OMG
14:1400 (0206) KRAL Volumeter - OMG OMG - Universal OMG The flowmeter for a wide range of applications Operating Conditions and Materials Flow Range: 0.1 to 7,500 l/min Max. Pressure: 250 bar Temperature
More informationDOE DESIGN OF EXPERIMENT EXPERIMENTAL DESIGN. Lesson 5
DOE DESIGN OF EXPERIMENT EXPERIMENTAL DESIGN Lesson 5 Framework of lesson 5: Introduction to the project 2 k (2 levels, k factors) Calculation of main effects and interactions in the case of only two factors
More informationSM98A Harsh Media Backside Absolute Pressure Series
SM98A Harsh Media Backside Absolute Pressure Series SM98A Series FEATURES Pressure Range: 10 Bar (145 PSIA), 20 Bar (290 PSIA) On-Board temperature sensing diode Small die (1.2 mm x 1.33 mm) Backside entry
More informationLab 5a: Magnetic Levitation (Week 1)
ME C134 / EE C128 Fall 2017 Lab 5a Lab 5a: Magnetic Levitation (Week 1) Magnetism, as you recall from physics class, is a powerful force that causes certain items to be attracted to refrigerators. Dave
More informationSpecific resistance of conductors
Specific resistance of conductors This worksheet and all related files are licensed under the Creative Commons Attribution License, version 1.0. To view a copy of this license, visit http://creativecommons.org/licenses/by/1.0/,
More informationINTERNATIONAL STANDARD
INTERNATIONAL STANDARD ISO 8426 Second edition 2008-02-01 Hydraulic fluid power Positive displacement pumps and motors Determination of derived capacity Transmissions hydrauliques Pompes et moteurs volumétriques
More informationKeywords. 1=magnetron sputtering, 2= rotatable cathodes, 3=substrate temperature, 4=anode. Abstract
Managing Anode Effects and Substrate Heating from Rotatable Sputter Targets. F. Papa*, V. Bellido-Gonzalez**, Alex Azzopardi**, Dr. Dermot Monaghan**, *Gencoa Technical & Business Support in US, Davis,
More informationThermal Resistance Measurement
Optotherm, Inc. 2591 Wexford-Bayne Rd Suite 304 Sewickley, PA 15143 USA phone +1 (724) 940-7600 fax +1 (724) 940-7611 www.optotherm.com Optotherm Sentris/Micro Application Note Thermal Resistance Measurement
More informationModel: WT-3181PL Instruction Manual DC: Indoor/Outdoor Atomic Wall Clock. Get Started
Model: WT-3181PL Instruction Manual DC: 041614 18 Indoor/Outdoor Atomic Wall Clock Round Battery Cover Get Started Step 1: Remove the round battery cover from the back of the clock. Step 2: Insert 1 fresh
More informationProduct Description. Further highlights. Outstanding features. 4 Bosch Rexroth Corporation Miniature Linear Modules R310A 2418 (2009.
4 Bosch Rexroth orporation Miniature Linear Modules R310A 2418 (2009.05) Product Description Outstanding features Rexroth Miniature Linear Modules are precise, ready-to-install linear motion systems that
More informationULTRASONIC FLOW MEASUREMENT WITH INTEGRATED TEMPERATURE MEASUREMENT COMPENSATION
ULTRASONIC FLOW MEASUREMENT WITH INTEGRATED TEMPERATURE MEASUREMENT COMPENSATION Benjamin E. McDonald, Lei Sui GE Oil & Gas - Measurement & Control 1100 Technology Park Dr., Billerica, MA 01821 USA * E-mail
More informationMetallized Polypropylene film capacitor PCMP 371
MKP RADIAL POTTED CAPACITORS Pitch 22.5/27.5 mm QUICK REFERENCE DATA Capacitance range Capacitance tolerance Rated voltage (AC) Rated Frequency Climatic category Temperature range Reference specification
More informationSwitching Hall Effect Sensor Design Example Application: commutation sensor precision motor timing device to control electronic commutation.
Switching Hall Effect Sensor Design Example Application: commutation sensor precision motor timing device to control electronic commutation. Requirements: 15 firing positions no bounce Minimal hysteresis
More informationPreparation of Food and Feed Samples for Metals Analysis
White Paper Preparation of Food and Feed Samples for Metals Analysis Alan Cross Technical Specialist, Metals Laboratory Preparation of Food and Feed Samples for Metals Analysis The relative virtues of
More informationApplications. Capacitance Tolerance G = ±2% J = ±5%
Surface Mount Metallized PPS Film Capacitor LDB, Unencapsulated Stacked Chip, Size 1206 1812, 16 and 50 VDC Overview Polyphenylene sulphide (PPS) film capacitor for surface mounting. Applications Typical
More informationAUTOMOTIVE CURRENT TRANSDUCER OPEN LOOP TECHNOLOGY HAH1BVW S/08
AUTOMOTIVE CURRENT TRANSDUCER OPEN LOOP TECHNOLOGY HAH1BVW S/08 Introduction The HAH1BVW family is for the electronic measurement of DC, AC or pulsed currents in high power and low voltage automotive applications
More informationMR Range. 0.82µF µ2F µ3F µ7F µF 85 50
MR Range. The MR range of capacitors is, we believe, the ultimate audio grade capacitor currently available on the market. It is the result of a two year research programme into the influence an audio
More informationDistributed by: www.jameco.com 1-800-831-4242 The content and copyrights of the attached material are the property of its owner. DS0026 Dual High-Speed MOS Driver General Description DS0026 is a low cost
More informationDetermining Characteristic Impedance and Velocity of Propagation by Measuring the Distributed Capacitance and Inductance of a Line
Exercise 2-1 Determining Characteristic Impedance and Velocity EXERCISE OBJECTIVES Upon completion of this exercise, you will know how to measure the distributed capacitance and distributed inductance
More informationCapacitor Technology and Manufacturing Expertise
Capacitors Capacitor Technology and Manufacturing Expertise With more than 25 years of experience in manufacturing single layer capacitors made with EIA Class I, II and III ceramic dielectric materials,
More informationTemperature Sensing. How does the temperature sensor work and how can it be used to control the temperature of a refrigerator?
Temperature Sensing How does the temperature sensor work and how can it be used to control the temperature of a refrigerator? Temperature Sensing page: 1 of 22 Contents Initial Problem Statement 2 Narrative
More informationThe Development of a High-Temperature PRT Calibration Process Based On Dry- Block Calibrators
The Development of a High-Temperature PRT Calibration Process Based On Dry- Block Calibrators Michael Coleman Fluke Corporation, Temperature Calibration Division, American Fork, Utah, USA mike.coleman@fluke.com
More informationTHE LASER TRACKER : A MAJOR TOOL FOR THE METROLOGY OF THE LHC
IWAA2004, CERN, Geneva, 4-7 October 2004 THE LASER TRACKER : A MAJOR TOOL FOR THE METROLOGY OF THE LHC M. Dupont, D. Missiaen, P. Winkes, CERN*, 1211 Geneva 23, Switzerland 1. INTRODUCTION The Large Hadron
More informationThermal Calculation for Linear Regulator
Linear Regulator Series Thermal Calculation for Linear Regulator The loss in linear regulators increases as the difference between the input and output voltages increases. Since most of the loss is converted
More informationS-57M1 Series HIGH-SPEED BIPOLAR HALL EFFECT LATCH. Features. Applications. Package. ABLIC Inc., Rev.1.
www.ablic.com www.ablicinc.com HIGH-SPEED BIPOLAR HALL EFFECT LATCH ABLIC Inc., 2011-2013 Rev.1.2_02 The, developed by CMOS technology, is a high-accuracy Hall IC that operates with a high-sensitivity,
More informationChip tantalum capacitors
Chip tantalum capacitors TCO series Case TCO Series Case Features () ) Conductive polymer used for the cathode material. 2) Ultra-low ESR. (/ compared with the conventional type) 3) Screening by thermal
More informationU.S. Atomic Clock & Weather Station. Instruction Manual
U.S. Atomic Clock & Weather Station Instruction Manual Table of Contents What is Atomic Radio Control?... 2 Parts Diagram... 3 Batteries... 4 Setting the Atomic Time and Date... 4 Setting the Clock...
More informationIn data sheets and application notes which still contain NXP or Philips Semiconductors references, use the references to Nexperia, as shown below.
Important notice Dear Customer, On 7 February 2017 the former NXP Standard Product business became a new company with the tradename Nexperia. Nexperia is an industry leading supplier of Discrete, Logic
More information