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Traceable Electrical Energy Metering Workshop

Registration form

Date(s): 5 September 2017; 6 September 2017;
Times: Each day begins at 9am (registration and coffee from 8.30 am) and ends at approximately 5:00pm.
Venue(s): Alan MacDiarmid Centre - Lower Hutt;
Cost: $895 + GST for one day
$1595 + GST for two days
Includes tuition, lunch, refreshments, and study materials.
Contact: Keith Jones

Course overview

If you are involved in the metering side of buying and selling power in New Zealand, you need to ensure that your measurements are trustworthy. Part 10 of the Electricity Industry Participation defines the requirements for metering equipment providers, approved test houses and metering installations. These requirements are intended to ensure that all electrical energy measurements are traceable to international standards with a known level of measurement uncertainty.

Measurement traceability requires regular calibration of your laboratory standards, assessment of the errors relevant to your measuring instruments, and procedures for calculating how these measurement errors combine to affect your final answer. This two-day course will enable you to understand the steps required to make traceable measurements. Practical examples will be worked through so that each participant can return to their laboratory more confident of their work.

Day one of this two-day practical course is designed to give all staff in the approved test houses an understanding of the technical side of their laboratory’s operation. It will also include advice specific for class B approved test houses on managing uncertainty from design to installation (Technical Guide 33 – Electricity Metering: Advice for Class B Approved Test Houses).

Day two goes into more depth and is particularly relevant for staff who need to understand their laboratory’s measurement uncertainties in detail. At the end of day two, participants can expect to be able to carry out the Calibration and Measurement Capability (CMC) calculations required for the Class A test houses and also to calculate the uncertainty of energy metering measurements both in the laboratory and in the field. Participants on day two are encouraged to bring the specifications for a particular meter or metering installation that can be used as a worked example.  Participants are also encouraged to bring their laptops so that they can gain hands-on experience of the software being demonstrated.

Programme Outline

The programme involves short interactive lectures followed by working through practical examples relating to the lecture subject. The content of the course includes:

Day One

• Introduction - why the emphasis on traceable measurement?
• Part 10 of the Electricity Industry Participation Code – An overview of the key points.
• Energy meters - the factors that affect their accuracy.
• Calibrating energy meters.
• Measuring transformers - the factors that affect their accuracy.
• Calibrating measuring transformers.
• Basic statistics - making sense of errors and corrections, expanded uncertainty, and confidence levels.
• Advice for class B approved test houses, managing uncertainty.
•  Comparative recertification.

Day Two

• The end-use of calibrated meters and measuring transformers; a demonstration of site certification using the MSL-developed MIEcalculator.
• Laboratory calibration including calibration intervals, laboratory environmental control, and calibration of test benches.
• Interpreting IEC standards and manufacturer’s specifications for energy meters and measuring transformers.
• Metrology verification of new technology - understanding transformer analysers.
• Uncertainty calculations for energy meters and measuring transformers- CMCs and your calibration certificate uncertainties.
• Site certification.
• Hands-on use of the MIEcalculator to calculate site error and uncertainty.
• Discussion. 

 

Presenter Profile

Keith Jones started in electrical metrology in 1979 initially working on the standard of capacitance with a calculable capacitor and later developing the New Zealand quantum Hall standard for resistance. From 1994-1996 he helped the electricity supply industry establish the first  version of the codes of practice for energy metering and provided the first proficiency testing scheme for energy meter calibration. Keith is engaged by IANZ as a technical assessor for ISO 17025 accredited calibration laboratories, is a Member of the Metrology Society of Australasia and of the Institute of Electrical and Electronics Engineers.

Tom Stewart began at MSL in 2008 after the completion of his MSc at Victoria University carried out in conjunction with Magritek Ltd (a manufacturer of novel NMR instruments and software). Since joining MSL Tom has been working extensively with MSL’s mains energy standard, including its maintenance, calibration and use for commercial calibration of industry energy meters. More recently he has been part of the team putting together a new quantum physics based voltage standard for ac and dc. Tom is a Member of the Institute of Electrical and Electronics Engineers.

Laurie Christian has had 38 years’ experience in a wide range of types of electrical measurement, including mains frequency energy. He has served as New Zealand’s delegate on the international Consultative Committee for Electricity and Magnetism that is responsible for advising on the SI electrical quantities. Laurie is engaged by IANZ as a technical assessor for ISO 17025 accredited calibration laboratories.  Laurie is a Member of the Metrology Society of Australasia and the New Zealand Institute of Physics.

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