Electricity + Control June 2016

CONTENTS

4

7

26

36

Pressure + level measurement 4

Calibrating pressure switches with a DPC Ron Ainsworth, Fluke Corporation

7 Not a crack: Level measurement for natural gas Dieter Hägele, KSR Kuebler Niveau-Messtechnik AG, a division of the WIKA Group 10 Round UP

Cables + accessories 16

Cable diagnostics in South Africa Ronald H Goodwin, H.V. Test

20

Round UP

Electrical protection + safety 26

Checking ground electrode impedance for commercial, industrial and residential buildings: Part 2 Technical information supplied by John Wilson on behalf of Comtest for a the Fluke Corporation

29 Protecting buildings and installations from hazardous lightning strikes and surges Kirk Risch, DEHN Africa 31 Round UP

Plant maintenance, test + measurement 32

Analytics and contact centres – add smarts and soar Andre Deetleefs, Jasco Enterprise Making technology work for you Neil Cameron, Johnson Controls Building Efficiency

33 34

Round UP

Energy + enviroFiciency: Focus on Control systems + automation 36 Ins and Outs of POE Brian Roth, Antaira Technologies 39 Round UP

Regulars

Cover

1 Comment 11 Cover article 42 A sense of Africa 43 Light+Current 45 Bizz Buzz 46 Social Engineers 48 Clipboard

KSR Kuebler became part of the WIKA Group in 2008. WIKA South Africa set up a local production line in 2014. These quality level measur- ing instruments are now available to the South Africanmarket directly from WIKA SA’s production line. Read more on page 11.

Visit our innovative online technical resource for the engineering industry. www.eandcspoton.co.za

FEATURES: • Pressure+ levelmeasurement • Cables+ accessories • Electrical protection+ safety • Plantmaintenance, test+measurement • Energy+ enviroFiciency: Focus on control systems+ automation

www.electricityandcontrolmagazine.co.za