DOCSLIB.ORG

Datacom & Electrical

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
Datacom & Electrical Products and tips for electrical professionals Volume 1, Number 1 Enter to win this handheld Casio 2.5" color television Details inside PRODUCT FOCUS Fluke Clamp Meters and Testers I Fluke Digital Multimeters I Infrared Thermometers I Accessories and more... ElectricalFLUKE News Products and tips for electrical professionals Electrical tools for electricians Volume 1, Number 1 Feature 2 Proper use of clamp meters in commercial settings Proper use of 5 Find hidden ac problems with true-rms clamp meters 6 Monitoring load current with a DMM in commercial settings 8 Testing residential cabling systems here’s nothing so • Each branch circuit should This is simply an extension-type 10 Is that a tingle she feels? annoying as a also be checked for possible cable where the outer insulation breaker that keeps overloading. is stripped so that the black, tripping, usually at • Finally, the grounding circuit white and green wires are Tthe most inopportune times. should be checked. There should exposed. It’s a lot easier than More annoying yet is not being be minimal current on the ground. taking the receptacle out to get at able to figure out why as the a wire. Plug the load into the production line stands silent Testing for leakage currents cable and the cable into the out- waiting for you to work your To check if there is leakage let. To measure load current, magic. The pressure’s on! current on a branch circuit, put clamp the black wire. Make the Beyond the basic measurements both the hot and neutral wires ground current check directly on clamps were specifically designed in the jaws of the clamp. Any the green cable or on the black for – circuit loading and balance current that is measured is leak- and white wire together. I of three-phase feeders – modern age current, i.e., current returning Products digital clamp meters have voltage on the ground circuit. The supply For the entire article, and resistance measurement (black wire) and return (white visit our web site at 2 Electrical tools capability as well. That means wire) currents generate opposing www.fluke.com/electric for electricians it’s possible to make most, if not magnetic fields. The currents all, of the common every-day should be equal (and opposite) 4 Test tools for electricians measurements using a clamp and the opposing fields should 7 Fluke digital multimeters meter. For optimum performance cancel each other out. If they that clamp meter should be a don’t, that means that some 8 Cable test solutions true-rms model, like the Fluke current, called leakage current, 335, 336 or 337. is returning on another path. The 10 Fluke accessories only other available path is the Clamp meters in ground. commercial environments If you do find Clamp meters are used at the ground current, you Fluke. Keeping your world panel board to measure circuit should check to see if up and running. loading on feeders as well as on any receptacles are branch circuits. Measurements on mis-wired (visit the Fluke Corporation branch circuits should always be Fluke Digital Library PO Box 9090, Everett, WA USA 98206 made at the load side of the at www.fluke.com/ Fluke Europe B.V. breaker or fuse. electric for informa- PO Box 1186, 5602 BD • Feeder cables should be tion on receptacle Eindhoven, The Netherlands checked for balance as well as diagnostics). It is also For more information call: loading: current on all three possible that individ- In the U.S.A. (800) 443-5853 or phases should be more or less ual loads have inter- Fax (425) 446-5116 In Europe/M-East/Africa +1 (31 40) 2 675 200 the same, to minimize the return nal leakage currents. or Fax +1 (31 40) 2 675 222 current on the neutral. In Canada (800) 36-FLUKE or • The neutral should also be Measuring Fax (905) 890-6866 checked for overloading. With individual loads From other countries +1 (425) 446-5500 or Fax +1 (425) 446-5116 harmonic loads, it’s possible for To measure individ- Web access: http://www.fluke.com/ the neutral to be carrying more ual loads, you can current than a feeder — even if use a break-out cord ©2002 Fluke Corporation. Specifications subject to change without notice. All rights reserved. the feeders are balanced. at the receptacle. Printed in U.S.A. 5/2002 1883223 C-ENG-N Rev A 2 Find more Fluke VoltAlert™ articles on Fluke 330 Voltage Detectors the Fluke and 320 Electrical Pocket-sized, non-contact ac voltage detec- News Series Clamp tors that glow red when near an outlet or Meters conductor if voltage is present. web site. • Fluke 1AC for 90 V ac to 600 V ac Choose from • Fluke 1LAC for 24 V ac to 90 V ac “Receptical 7 new clamp CAT III 600 V measurements meters to get are simple — the right combination of features understanding what and functions that fit your job. they mean is not” • Measures amps, volts, ohms and continuity www.fluke.com/electric • Backlight available on most models • New inrush current feature measures motor-starting current the way a circuit breaker or overload unit sees it (selected models) “Non-contact • All models feature display hold button and auto shut-off temperature • 3-year warranty on 330 Series, 2-year warranty on 320 Series • Includes: batteries, test leads, instruction card, safety sheet and measurements using carrying case Fluke 61 IR Thermometer IR thermometers” CAT III 600 V Easy to use www.fluke.com/electric Test drive this product before you buy • Quick non-contact temperature measurements at www.fluke.com/electric from -18 to 275 ºC (0 to 525 ºF) • 0.2 ºC or 0.5 ºF resolution • Backlight illuminates the display in the dark • Laser-sighted; 8:1 optical resolution T5-600 and T5-1000 Electrical Testers • OpenJaw™ technology for easy current measurements Fluke 65 IR Thermometer • AC amps to 100.0 A • Continuity/ohms to 1000 Ω • 600 volts ac/dc (model T5-600)/ Best IR accuracy 1000 volts ac/dc (model T5-1000) • Quick non-contact temperature measurements T5-600: CAT III 600 V from -40 to 500 °C (-40 to 932 °F) T5-1000: CAT III 1000 V, CAT IV 600 V • Resolution of 0.1° up to 200°, 1° over 200° • Repeatability of ±1º or ±1 %, whichever is greater • Backlight illuminates the display in the dark • Laser-sighted; 8:1 optical resolution T3 Tester • Easy-to-use, rugged two-pole tester with 7-level LED indicator • AC and DC voltage and continuity • Auto-on light that automatically turns off after eight minutes • Test leads and probes included 1000 V CAT III, 600 V CAT IV 3 Test tools for electricians Fluke 1520 Fluke 1550 MegOhmMeter MegOhmMeter • Three output voltages for insulation • Digital MegOhmMeter that tests resistance testing: 250 V, 500 V, 1000 V switchgear, motors, generators and • Insulation resistance testing up to 4000 MΩ cables up to 5000 V dc. • AC/DC voltage measurement up to 600 V • Wide range of tests - simple spot CAT III 600 V checks to timed tests and break- down tests Test drive this product before you buy • Measurement storage and included at www.fluke.com/electric PC interface software make it ideal for preventative maintenance. CAT III 600 V Test drive this product before you buy at www.fluke.com/electric Find more articles on Fluke 43B Power Fluke 41B Power the Fluke Quality Analyzer Harmonics Analyzer Electrical News Performs the measurements • Displays the harmonic spectrum, waveform web site. you need to maintain power and complete power data for non-linear systems, troubleshoot power waveforms. • Saves up to eight sets of measurement data. problems and diagnose “Power quality • Use the included FlukeView® software to equipment failures. download data to your PC for analysis and at the service panel” presentation. Display voltage and current waveforms www.fluke.com/electric • • Measure real power, apparent power CAT III 600 V and power factor “Troubleshooting • Record sags and swells, capture power harmonics” transients and displays harmonics up to the 51st harmonic www.fluke.com/electric CAT III 600 V Test drive this product before you buy at www.fluke.com/electric VR101S Voltage Event Recorder System • Records up to 4000 sags, swells transients, outages and frequency variations on line voltage at receptacles • Includes a compact VR101 event recorder, an optical interface cable, and EventView™ software that turns your PC into a power quality reporting tool. CAT III 300 V 4 easuring ac sig- Enter true-rms. nals accurately is Today’s more complicated signal a fundamental, measurements require the right but increasingly tools. That’s why Fluke Corporation Mdifficult, job in today’s offices and designed its 170 Series Digital industrial plants. Personal comput- Multimeters (DMMs) with true-rms ers, electronic lighting, and (root mean square) capabilities. adjustable speed drives controlling True-rms meters give correct read- the air handling equipment in large ings for any wave shape within office buildings are just a few exam- the instrument’s crest factor and ples of types of non-linear loads; bandwidth specifications. loads that draw current in abrupt True-rms meters pulses rather than in a smooth, eliminate the risk of sinusoidal manner. These pulses these incorrect measure- cause distorted current wave shapes ments. A true-rms meter that in turn cause harmonic currents uses an electronic to flow back into other parts of the measurement technique power system. to provide the user with Symptoms of harmonics usually the correct effective value show up in the power distribution of an ac current, whether equipment that supports the non- the signal’s waveform is linear loads, whether single-phase or a perfect sine wave or three-phase.
Load more

Recommended publications
  • Current Clamps Catalogue About the CHAUVIN ARNOUX GROUP
    Current Clamps Catalogue About the CHAUVIN ARNOUX GROUP Founded in 1893 by Raphaël Chauvin and René Arnoux, CHAUVIN ARNOUX is an expert in the measurement of electrical and physical quantities in the industrial and tertiary sectors. Total control of product design and manufacturing in-house enables the Group to innovate constantly and to propose a very broad product and service offering meeting all its customers’ needs. The Group’s quality policy enables it to deliver products which comply with the specifi cations, as well as the international and national standards, in the metrological, environmental and user-safety sectors. "CHAUVIN ARNOUX is a major Your partner: force on the measurement market • energy performance in France and internationally" • regulatory testing • environmental measurements • installation supervision and sizing. A few fi gures • 100 million euros of sales revenues • 10 subsidiaries spread across the world • 900 employees • 7 production sites • 6 R&D departments worldwide • 11 % of revenues invested in R&D The Current CLamps Catalogue Clamps and fl exible probes " accessories " ■ Theoretical overview .........................................i.1 ■ Selection guides AC ....................................................................... i.2 AC/DC ................................................................. i.3 Leakage / Scope / Process / CT output ................. i.4 ■ AC current clamps G MINI series ..........................................................1.0 G MN series ..........................................................
    [Show full text]
  • DC/AC Current Clamp 2000A a 1636 Instruction Manual Version 1.2, Code No
    DC/AC Current clamp 2000A A 1636 Instruction manual Version 1.2, Code no. 20 752 824 Distributor: Manufacturer: METREL d.d. Ljubljanska cesta 77 1354 Horjul Slovenia web site: http://www.metrel.si e-mail: [email protected] © 2012 METREL Mark on your equipment certifies that this equipment meets the requirements of the EU (European Union) concerning safety and electromagnetic compatibility regulations. No part of this publication may be reproduced or utilized in any form or by any means without permission in writing from METREL. 2 A 1636 DC/AC Current clamp Table of contents 1 SYMBOLS AND WARNINGS .................................................................................. 4 2 DESCRIPTION OF CURRENT CLAMP ................................................................... 5 3 OPERATION INSTRUCTIONS ................................................................................ 6 4 MAINTENANCE ....................................................................................................... 7 INSPECTION ................................................................................................................... 7 CLEANING ...................................................................................................................... 7 SERVICE AND CALIBRATION ............................................................................................. 7 5 TECHNICAL SPECIFICATIONS .............................................................................. 8 3 A 1636 DC/AC Current clamp 1 Symbols and Warnings To ensure
    [Show full text]
  • Chapter 5 : Power Meters
    EE 101 MEASUREMENT Power Meters / 1 CHAPTER 5 : POWER METERS 5.1 Power Meter Power meter is electric meter : and define as a meter for measuring the amount of electric power used in watt of any given circuit. Figure 5.1 : Power Meter 5.2 Principles of Analogue Wattmeter W P Figure 5.2 : Symbol of Power Meter The traditional analog wattmeter is an electrodynamics instrument. The device consists of a pair of fixed coils , known as current coils , and a movable coil known as the potential coil . The current coils connected in series with the circuit, while the potential coil is connected in parallel . Also, on analog wattmeters, the potential coil carries a needle that moves over a scale to indicate the measurement. A current flowing through the current coil generates an electromagnetic field around the coil. The strength of this field is proportional to the line current and in phase with it. The potential coil has, as a general rule, a high-value resistor connected in series with it to reduce the current that flows through it. The result of this arrangement is that on a dc circuit, the deflection of the needle is proportional to both the current and the voltage , thus conforming to the equation W=VA or P=VI . On an ac circuit the deflection is proportional to the average instantaneous product of voltage and current, thus measuring true power, and possibly (depending on load characteristics) showing a different reading to that obtained by simply multiplying the readings showing on a stand-alone voltmeter and a stand-alone ammeter in the same circuit.
    [Show full text]
  • What Is True-Rms?
    Left: Sinusoidal (sine) alternating current waves. Right: nonsinusoidal waves. What is true-rms? A true-rms device (rms = root mean square) is one of three tools that can measure alternating current (ac) or ac voltage: 1. True-rms digital multimeters (or clamp meter) 2. Average-responding digital multimeter (or clamp meter) 3. Oscilloscope Only the first two are commonly used, and both can accurately measure standard (pure ac) sinusoidal waveforms. Yet a true-rms meter is widely preferred because only it can accurately measure both sinusoidal and nonsinusoidal ac waveforms. See illustrations at the top of the page. Sinusoidal (sine) waves: Pure, without distortion, with symmetrical transitions between peaks and valleys. Nonsinusoidal waves: Waves with distorted, irregular patterns—spikes, pulse trains, squares, triangles, sawtooths and any other ragged or angular waves. As mentioned previously, rms = root mean square. Though its formula can be challenging to grasp, rms essentially calculates the equivalent direct current (dc) value of an ac waveform. More technically, it determines the “effective,” or dc heating value, of any ac wave shape. An average-responding meter uses averaging mathematical formulas to accurately measure pure sinusoidal waves. It can measure nonsinusoidal waves, but with uncertain accuracy. A more sophisticated true-rms meter can accurately measure both pure waves and the more complex nonsinusoidal waves. Waveforms can be distorted by nonlinear loads such as variable speed drives or computers. An averaging meter attempting to measure distorted waves can be up to 40% low or 10% high in its calculations. The need for true-rms meters has grown as the possibility of nonsinusoidal waves in circuits has greatly increased in recent years.
    [Show full text]
  • Digital Clamp Meter Operation Manual
    MS2108 DIGITAL CLAMP METER OPERATION MANUAL 600V CAT.lll OFF MAX 600A A MS2108 A V Ω SEL OFF MIN B.L MAX RAN Hz/% HOLD Press 2 Sec T-RMS AUTO-PWER OFF AC/DC CLAMP METER INRUSH AUTO MANU MAX MIN ZERO °C°F% μmVA nμmF MkΩ Hz TRMS INRUSH COM INPUT 600V CAT. III MAX 600V CONTENTS CONTENTS 1. Safety Information............................1 4.7 Auto Power Off..........................................18 1.1 Preliminary............................................1 4.8 Preparing For Measurement ......................19 1.2 During use ...........................................2 1.3 Symbols................................................3 4.9 Measuring Ac Current ...............................20 1.4 Maintenance.........................................4 4.10 Measuring Inrush Current........................22 4.11 Measuring Dc Current..............................24 2. Description....................................... 4 4.12 Measuring Ac Voltage..............................26 2.1 Names OF Parts....................................6 4.13 Measuring Dc Voltage. .............................27 2.2 Switch, Buttons And Input Jacks............7 4.14 Measuring Frequency ..............................30 2.3 Names OF Parts ..................................7 4.15 Measuring Duty.......................................34 3. Specifications..................................11 4.16 Measuring Resistance .............................38 4.17 Testing Diode ..........................................40 3.1 General Specifications ........................11 3.2 Technical
    [Show full text]
  • Fluke Web and Electronic Newsletter
    2007 Test Tools Catalog Digital Multimeters Clamp Meters Electrical Testers Insulation Testers Installation Testers Portable Appliance Testers Indoor Air Quality Tools Digital Thermometers Thermal Imagers Power Quality Tools ScopeMeter® Test Tools Field Calibrators EX Test Tools Accessories Contents Fluke web and electronic newsletter.............................................. 1 Power Quality Tools.......................................................................... 56 New from Fluke .................................................................................. 2-4 Power Quality Selection Guide .................................................... 57 345 Power Quality Clamp Meter.................................................. 58 43B Single-phase Power Quality Analyzer................................ 59 430 Series Three-phase Power Quality Analyzers .................. 60-61 Application/background articles .................................................. 5 VR101S Voltage Event Recorder System .................................... 62 Fluke where safety is built-in...................................................... 6-7 1735 Power Logger........................................................................ 63 Why true-RMS................................................................................ 8 1740 Series Power Quality Loggers ............................................ 64 Adjustable speed drives................................................................ 9 1760 Power Quality Recorder .....................................................
    [Show full text]
  • TA018 60 a AC/DC Current Clamp User's Guide
    AC/DC mA CURRENT CLAMP TA018 USER’S GUIDE CLAMP 300V CAT.II 60A INTRODUCTION The AC/DC mA Current Clamp is a transducer which will allow your multimeter to measure low electrical or/and elec- tronic current up to 60 amperes AC/DC, with a frequency response up to 20kHz. When measuring current with this clamp, there is no need to break a circuit or to disturb the insulation. The extended measurement jaws allow performing mea- surements in a narrow space. When measuring DC current, a simple operating push button is designed for zero adjustment. The clamp adaptor is applicable to leakage detec- tion or monitoring. APPLICATION PROCEDURES 1. Connect the BNC plug to the input of any oscilloscope or other measuring instrument with an input impedance of at least 10 kΩ. 2. Set the power switch from “ OFF” to the desired range, 1mV/10mA or 1mV/100mA position. The green LED will light to indicate that the clamp is switched on. 3. For current measurement below 2A, set the unit to 1mV/ 10mA range and set the oscilloscope to 200mV AC range for AC current measurements, or 200mV DC range for DC current measurements. If the measured current exceeds 2A, set the unit to 1mV/100mA range. 4. When perform DC current measurement, always push the zero adjustment button on the clamp until the oscilloscope reads zero. 5. Clamp the jaws around the current-carrying conductor and interpret the reading according to Step 3 above. 6. When 1mV/10mA range of clamp unit is selected, multiply the reading displayed on the oscilloscope by “10” to interpret the measured current value in mA.
    [Show full text]
  • Test Tools Catalog Volume One, 2007
    Test Tools Catalog Volume one, 2007 Fluke Ti20 Thermal Imager Fluke 975 AirMeter™ Fluke 1587 Insulation Multimeter Fluke 199C Find it. Fix it. Fast. Color ScopeMeter® Test Tools Catalog Volume 37, 2007 Contact us: Contents United States General product and sales Fluke tools for: Process Calibration Tools information: 1-888-44-FLUKE Commercial Electricians ...................................... 3 Process Tools Selection Guide ..........................37 Fluke Thermal Imagers: Industrial Electricians .......................................... 4 744, 743B, 741B Documenting Process 1-800-760-4620 (U.S. only) all HVAC/IAQ Technicians ........................................ 5 Calibrators ...........................................................38 other regions 1-425-446-4620 Online resource centers .................................. 6 726, 725 Precision Multifunction Process Service and calibration: Fluke test tool information ............................. 7 Calibrators ...........................................................39 1-800-993-5853 Safety and its importance ............................... 8 724, 714, 712 Temperature Calibrators ...........40 Parts: 1-800-526-4731 Service, repair, and calibration .................... 9 718, 717 Pressure Calibrator, 700 Series Canada Digital Multimeters Pressure Modules ............................................... 41 General product and sales 715, 707, 705 Loop Calibrators ........................42 information: 1-800-36-FLUKE Multimeter Selection Guide .............................. 10 Service,
    [Show full text]
  • Basics of Electricity Measurement Basics Accuracy & Calibration
    Basics of Electrical Testing www.hioki.com Basics of Electricity Measurement Basics Accuracy & Calibration Electricity in Terms of Water Flow Measurement Category 1 Voltage Testing Resistance Testing Insulation Resistance Testing 4 How to Calculate Accuracy 1 Primary electrical circuits in equipment connected to an AC• electrical outlet by a • • Electricity can be likened to the flow of water. Connect to the circuit in parallel. Always conduct zero adjustment when measuring resistance. (Mechanical and Current CAT II power cord Measurement principle Digital Measuring Instruments Input impedance : low Input impedance : high electrical zero adjustment) Situations where voltage is being applied is hazardous Ohm’s Law Voltage = Current × Resistance High + Primary electrical circuits of heavy equipment (fixed installations) connected Analog Digital Switch from the transmission circuit, boost with a transformer to apply a high The accuracy and tolerance described in the product Instrument loss : large Instrument loss : small so separation is critical. specifications are given in terms of rdg., f.s., and dgt. CAT III directly to the distribution panel, and feeders from the distribution panel to outlets Max. voltage, then measure the current and convert it to a resistance value. Measurement uncertainty is often defined, and the uncertainty 300.0 V range BAT Electric External noise : low susceptibility External noise : high susceptibility displayed Potential The circuit from the service drop to the service entrance, and to the power meter Resistance measurement circuit of an analog meter Measurement terminal voltage characteristics (Hioki IR4000 series) limit is obtained from these values. MEASURE value Voltage Voltage EARTH A B A CAT IV and primary overcurrent protection device (distribution panel) SW 1,200 (1) f.s.
    [Show full text]
  • Clamp Meter / Power Meter
    ClampClamp metermeter // PowerPower metermeter Clamp meter / Power meter PCE-DC1 PCE-DC2 PCE-DC3 Clamp meter 200 A AC/DC & freq. Clamp 200 A AC/DC (+ V AC/DC + Ω ) Clamp 2/80 A AC/DC current detector • LCD display 3 2/3 digits, with backlight • LCD display 3 2/3 positions, with backlight • LCD display 3 2/3 digits, with backlight • Measures AC / DC current, AC voltage & frequency • Measures AC / DC current, voltage & resistance • Measures AC / DC current up to 80 A • Hold function av. value/ zero reset for the DCA • Hold function / zero reset for the DCA • Hold function / zero reset for the DCA • Test voltage without contact • Test voltage without contact • Test voltage without contact • Automatic range selection/ Automatic off • Automatic range selection/ Automatic off • Automatic range selection/ Automatic off • Measuring point illuminated & white LEDs • Aperture of the clamp: 18 mm • Aperture of the clamp: 18 mm TOP seller Our range of devices include clamp-on ammeters for Technical specifications Technical specifications Technical specifications measuring current leaks, AC and DC power, voltage, power, Magnit. Range / res. / Accuracy Magnit. Range / res. / Accuracy Magnit. Range / res. / Accuracy resistance, pace, capacity or frequency. AC current 200 A / 100 mA / ±3.0 % +8 dgt AC current True RMS 200 AAC / ± (2.5 % +8 dgt) AC current 2 A / 1 mA / ±2.8 % +10 dgt DC current 200 A / 100 mA / ±2,8 % +8 dgt DC current 200 ADC / ± (2.0 % +5 dgt) 80 A / 100 mA / ±3.0 % +8 dgt Frequency 40 ... 50 Hz / 0.01 Hz / ±1.2 % +5 dgt AC Resis.
    [Show full text]
  • Operating Instructions the U1583A Current Clamp Is a Dual Range (40 a and 400 A) Clamp-On AC Current Clamp
    Agilent U1583A Current Clamp Operating Instructions The U1583A current clamp is a dual range (40 A and 400 A) clamp-on AC current clamp. This U1583A current clamp is designed for Agilent handheld digital multimeters (DMM) and Agilent handheld oscilloscopes. The CE mark is a registered trademark of the European Community. This CE mark shows that the product complies with all the relevant European Legal Directives The UL mark is a registered trademark of Underwriters Laboratories Inc. Assistance For technical assistance, contact your nearest Agilent Sales Offi ce or visit the Agilent website at www.agilent.com/fi nd/assist for further information. Safety Information Please use the Agilent U1583A current clamp only as specifi ed in this manual. Otherwise, the protection provided may be impaired. Refer to the safety information below. A WARNING identifi es conditions and actions that pose hazards to the user. A CAUTION identifi es conditions and actions that may be damaging to the equipment under test. WARNING To avoid possible electric shock, personal injury or damage to this instrument, ensure that you use the adapter safely, and follow these guidelines: - Do not use the adapter if it is damaged. Inspect the case before you use the adapter. Look for cracks or missing plastic. Pay particular attention to the insulation surrounding the connectors. - Inspect the clamp jaw before each use. It shall not have cracks or missing parts, loose or weakened components. Be sure there is insulation surrounding the jaw. - Inspect output cable without exposing the metal to ensure insulation. - Do not operate the adapter around explosive gas, vapor or dust.
    [Show full text]
  • Plant Maintenance
    Products and tips for industrial professionals Volume 1, Number 1 Enter to win this handheld Casio 2.5" color television Details inside PRODUCT FOCUS 200 MHz, Color ScopeMeter® Series I Fluke Digital Multimeters I Infrared Thermometers I Accessories and more... PlantFLUKE News Products and tips for industrial professionals Fluke digital multimeters – Rugged. Reliable. Accurate. Volume 1, Number 1 Feature 2 Monitoring load current with a DMM Monitoring 4 Proper use of clamp meters in commercial settings load current 6 Troubleshooting with a process loops DMM 8 Infrared technology makes safe measurements 10 Is that a tingle she feels? digital multimeter think “amps” when (DMM) has become reading the display. a necessity for The current clamp electrical system is designed to clamp Ameasurements, and most electri- around a single con- cians and electronic technicians ductor and uses the would feel lost without one. fluctuating magnetic The features available in today’s field around the meters make them versatile conductor to induce Products enough to find most problems in a current. Because it electrical and electronic circuits. uses transformer 2 Fluke digital There are, however, some action, the current multimeters measurement tasks that make transformer is only a technician think twice about usable on ac circuits. 4 Electrical tools for his DMM. However, there are other clamps, your nearest Fluke distributor. industrial electricians Take for instance, load currents. like the Fluke i410, designed to These same distributors stock a Many DMMs are designed to use the “Hall Effect” sensor which collection of Fluke DMMs with 6 Tools for process safely measure current up to 2, allows them to be used on both ac varying feature sets so you can professionals 10 or 20 amps depending on the and dc circuits.
    [Show full text]