Four times the diagnostic power
The first four-channel scopes built for CAT IV environments.
New Fluke 190 Series II ScopeMeter® :
Four independent isolated input channels for testing three-phase power electronics or three-axis testing of industrial automation systems
CAT III 1000V/CAT IV 600V safety rating Fast sample rate and deep memory let you see more and fi x more Up to 7-hour Li-ion batteries are standard with easy access battery door Isolated USB ports for memory devices and easy PC connectivity
Learn more at www.fl
uke.co.uk/4ch
©2011 Fluke Corporation. Specifications are subject to change without notice. Ad no. 3832868A
TEST & MEASUREMENT Enter 9
sed in conjunction with a two-pole voltage tester, Megger’s new MPU690 proving unit
to New
Fluke. Keeping your world up and running.®
provides a fast and dependable method of confirming that circuits are dead prior
Precision power analyser
successful range of digital power measuring instruments. Replacing the WT1600, an industry standard for the WT1800 offers
T many years,
he Yokogawa WT1800 precision power analyser is the latest addition to the company's highly
innovative
measurement functions which benefit the engineer with electrical power and efficiency measurements in a range of industries from inverter and drive design to alternative energy systems. The WT1800 is capable of performing up to six
power input measurements, which makes it possible to perform efficiency tests between the input and output of products such as inverters. With its high- resolution 8.4-inch XGA display, the instrument is simple to set up and display up to 12 different pages of measurement items in formats such as numeric, waveforms and trends. A vector display is available for voltage and current phase analysis.
Yokogawa Measurement Tel: 01628 535640 Web:
www.yokogawa.com/uk
Electrical Engineering MAY 2011 enter 800
carrying out work on them. The new proving unit features time-saving automatic operation and its high output power makes it suitable for use with lamp type voltage testers as well as with more modern units. To ensure safety, when a two-pole voltage
tester is used to confirm that a circuit is dead, the correct operation of the tester itself must be verified using a known live voltage source both before and after checking the circuit. Often, however, no suitable voltage source is available. The new MPU690 provides a convenient and reliable alternative. Compact, robust and easily accommodated in
any toolbox, this battery-operated unit generates a range of test voltages from 50 V to 690 V in five steps, and has a 50 Hz output that accurately mimics the normal mains supply. For added convenience, the MPU690 has a magnetic back that can be used to secure it to steel enclosures and similar surfaces, and it has terminals that are widely spaced to allow use with shrouded probes. The operation of the MPU690 is fully automatic.
As soon as the probes of the voltage indicator being checked are connected to the unit, it turns on and initially produces an output of 690 V. After a short delay, it then slowly ramps down through each of the other voltage steps before switching itself off. The voltage steps are indicated by individual LEDs and an additional LED is provided to confirm that the batteries in the proving unit are healthy. The batteries used are readily available standard AA types, and the design of the unit is such that
these have a very long service life – typically around 550 tests. The MPU690 measures just 130 x 68 x 48 mm and weighs less than 350 g including batteries.
Megger Tel: 01304 502100 Web:
www.megger.com enter 801 13
Megger provides proof of safety U
Page 1 |
Page 2 |
Page 3 |
Page 4 |
Page 5 |
Page 6 |
Page 7 |
Page 8 |
Page 9 |
Page 10 |
Page 11 |
Page 12 |
Page 13 |
Page 14 |
Page 15 |
Page 16 |
Page 17 |
Page 18 |
Page 19 |
Page 20 |
Page 21 |
Page 22 |
Page 23 |
Page 24 |
Page 25 |
Page 26 |
Page 27 |
Page 28 |
Page 29 |
Page 30 |
Page 31 |
Page 32 |
Page 33 |
Page 34 |
Page 35 |
Page 36 |
Page 37 |
Page 38 |
Page 39 |
Page 40 |
Page 41 |
Page 42 |
Page 43 |
Page 44 |
Page 45 |
Page 46 |
Page 47 |
Page 48 |
Page 49 |
Page 50 |
Page 51 |
Page 52