This Code of Practice Four (CoP4) relates to the requirements for the Calibration, sample Calibration, Commissioning of Metering Equipment and the maintaining of associated records with respect to the above for Settlement purposes. It defines the minimum requirements that participants must meet.

18.0

<div data-id="foreword" style="margin-left:0.5in;text-align:left;text-indent:-0.5in">FOREWORD</div>

<div data-id="1" style="margin-left:0.5in;text-align:left;text-indent:-0.5in">1. SCOPE</div>

<div data-id="2" style="margin-left:0.5in;text-align:left;text-indent:-0.5in">2. APPLICATION TO OTHER CODES OF PRACTICE</div>

<div data-id="3" style="margin-left:0.5in;text-align:left;text-indent:-0.5in">3. REFERENCES</div>

<div data-id="4-4.1" style="text-align:left">4.1 Accredited Laboratory ‡</div>

<div data-id="4-4.2" style="text-align:left">4.2 Actual <u class='defined-term'>Metering Point</u> ‡</div>

<div data-id="4-4.3" style="text-align:left">4.3 Adjustment ‡</div>

<div data-id="4-4.4" style="text-align:left"><span>4.4 </span><span><b>Blank Calibrated <u class='defined-term'>Meter</u> </b></span><span>‡</span></div>

<div data-id="4-4.5" style="text-align:left">4.5 <u class='defined-term'>Boundary Point</u> *</div>

<div data-id="4-4.6" style="text-align:left">4.6 Calibration ‡</div>

<div data-id="4-4.7" style="text-align:left">4.7 <span><b>Commissioning </b></span>‡</div>

<div data-id="4-4.8" style="text-align:left">4.8 Commissioning End to End Check ‡</div>

<div data-id="4-4.9" style="text-align:left"><span><b>4.9 </b></span><span><b>Compensation </b></span><span><b>‡</b></span></div>

<div data-id="4-4.10" style="text-align:left"><span><b>4.10 Compensated <u class='defined-term'>Meter</u> ‡</b></span></div>

<div data-id="4-4.11" style="text-align:left"><span><b>4.11 Defined <u class='defined-term'>Metering Point</u> ‡</b></span></div>

<div data-id="4-4.12" style="text-align:left"><span><b>4.12 </b></span><span><b><u class='defined-term'>electricity</u> *</b></span></div>

<div data-id="4-4.13" style="text-align:left"><span><b>4.13 <u class='defined-term'>Equipment Owner</u> *</b></span></div>

<div data-id="4-4.14" style="text-align:left"><span><b>4.14 </b></span><span><b>Independent Connection Provider </b></span><span><b>†</b></span></div>

<div data-id="4-4.15" style="text-align:left"><span><b>4.15 <u class='defined-term'>Meter</u> *</b></span></div>

<div data-id="4-4.16" style="text-align:left"><span><b>4.16 </b></span><span><b><u class='defined-term'>Meter</u> Type </b></span><span><b>‡</b></span></div>

<div data-id="4-4.17" style="text-align:left"><span><b>4.17 <u class='defined-term'>Metering Equipment</u> *</b></span></div>

<div data-id="4-4.18" style="text-align:left"><span><b>4.18 <u class='defined-term'>Outstation</u> *</b></span></div>

<div data-id="4-4.19" style="text-align:left"><span><b>4.19 </b></span><span><b>Overall Accuracy </b></span><span><b>‡</b></span></div>

<div data-id="4-4.20" style="text-align:left"><span><b>4.20 Reference Conditions ‡</b></span></div>

<div data-id="4-4.21" style="text-align:left"><span><b>4.21 </b></span><span><b>Reference Standard </b></span><span><b>‡</b></span></div>

<div data-id="4-4.22" style="text-align:left"><span><b>4.22 Reference Temperature ‡</b></span></div>

<div data-id="4-4.23" style="text-align:left"><span><b>4.23 Single Line Diagram (SLD) ‡</b></span></div>

<div data-id="4-4.24" style="text-align:left"><span><b>4.24 </b></span><span><b>Standard(s)</b></span></div>

<div data-id="4-4.25" style="text-align:left"><span><b>4.25 <u class='defined-term'>Systems Connection Point</u> *</b></span></div>

<div data-id="4-4.26" style="text-align:left"><span><b>4.26 Testing Facilities </b></span></div>

<div data-id="4-4.27" style="text-align:left"><span><b>4.27 </b></span><span><b>Test House </b></span><span><b>‡</b></span></div>

<div data-id="4-4.28" style="text-align:left"><span><b>4.28 Traceable ‡</b></span></div>

<div data-id="4-4.29" style="text-align:left"><span><b>4.29 Transfer Standard ‡</b></span></div>

<div data-id="4-4.30" style="text-align:left"><span><b>4.30 </b></span><span><b>Working Standard </b></span><span><b>‡</b></span></div>

<div data-id="4" style="margin-left:0.5in;text-align:left;text-indent:-0.5in">4. DEFINITIONS AND INTERPRETATIONS</div>

<div data-id="5-5.1-5.1.1" style="text-align:left"><b>5.1.1 Types of Calibration</b></div>

<div data-id="5-5.1-5.1.2" style="text-align:left"><b>5.1.2 <u class='defined-term'>Meter</u> Calibration Criteria</b></div>

<div data-id="5-5.1-5.1.3" style="text-align:left"><b>5.1.3 Sealing</b></div>

<div data-id="5-5.1-5.1.4" style="text-align:left"><b>5.1.4 Records</b></div>

<div data-id="5-5.1" style="text-align:left">5.1 <u class='defined-term'>Meter</u>s – Calibration</div>

<div data-id="5-5.2" style="text-align:left">5.2 Sample Calibrations</div>

<div data-id="5-5.2A" style="text-align:left">5.2A End of Life Sample Calibrations</div>

<div data-id="5-5.3-5.3.1" style="text-align:left"><b>5.3.1 Responsibility for Calibrations and maintenance of Records.</b></div>

<div data-id="5-5.3-5.3.2" style="text-align:left"><b>5.3.2 Initial Calibration</b></div>

<div data-id="5-5.3-5.3.3" style="text-align:left">5.3.3 Periodic Calibration</div>

<div data-id="5-5.3-5.3.4" style="text-align:left">5.3.4 Records</div>

<div data-id="5-5.3" style="text-align:left">5.3 Measurement Transformers and Testing Facilities</div>

<div data-id="5-5.4" style="text-align:left">5.4 Voltage failure alarm</div>

<div data-id="5-5.5-5.5.1" style="text-align:left">5.5.1 Instruments for Commissioning</div>

<div data-id="5-5.5-5.5.2" style="text-align:left">5.5.2 Commissioning Tests</div>

<div data-id="5-5.5-5.5.3" style="text-align:left">5.5.3 Sealing</div>

<div data-id="5-5.5-5.5.4" style="text-align:left">5.5.4 Records</div>

<div data-id="5-5.5" style="text-align:left">5.5 Commissioning</div>

<div data-id="5-5.6" style="text-align:left">5.6 Proving</div>

<div data-id="5-5.7" style="text-align:left">5.7 Commissioning End to End Check</div>

<div data-id="5-5.8" style="text-align:left">5.8 Single Line Diagram</div>

<div data-id="5" style="margin-left:0.5in;text-align:left;text-indent:-0.5in">5 HALF HOURLY METERING SYSTEMS<a class="sdfootnoteanc" name="sdfootnote4anc" href="#sdfootnote4sym" data-footnote="Save for those arrangements where the (only) metering used for Settlement purposes is CoP 10."><sup>4</sup></a></div>

<div data-id="6-6.1" style="text-align:left">6.1 Commissioning</div>

<div data-id="6-6.2" style="text-align:left">6.2 Commissioning Tests</div>

<div data-id="6" style="margin-left:0.5in;text-align:left;text-indent:-0.5in">6 NON HALF HOURLY METERING SYSTEMS<span><a class="sdfootnoteanc" name="sdfootnote15anc" href="#sdfootnote15sym" data-footnote="This section is provided to cover the requirements for Commissioning and in-service testing of all non-half hourly <u class='defined-term'>Metering Equipment</u>, and HH <u class='defined-term'>Metering Equipment</u> where the (only) metering used for Settlement purposes is CoP 10. In respect of in-service testing of <u class='defined-term'>Meter</u>s certified under the Electricity Act, the requirements of the national sample survey will apply until 2016. The requirements for in-service testing of MID approved (under Statutory Instruments 2016 No.1153) <u class='defined-term'>Meter</u>s will be populated to this section once they are agreed."><sup>13</sup></a></span> AND COP10 HH METERING SYSTEMS</div>

<div data-id="7-7.1-7.1.1" style="text-align:left">7.1.1 Temperature tolerance</div>

<div data-id="7-7.1-7.1.2" style="text-align:left">7.1.2 Calibration intervals</div>

<div data-id="7-7.1" style="text-align:left">7.1 Reference Standards</div>

<div data-id="7-7.2-7.2.1" style="text-align:left">7.2.1 Temperature tolerance</div>

<div data-id="7-7.2-7.2.2" style="text-align:left">7.2.2 Calibration intervals</div>

<div data-id="7-7.2-7.2.3" style="text-align:left">7.2.3. Outside specification</div>

<div data-id="7-7.2" style="text-align:left">7.2 Transfer Standards</div>

<div data-id="7-7.3-7.3.1" style="text-align:left">7.3.1 Temperature tolerance</div>

<div data-id="7-7.3-7.3.2" style="text-align:left"><span>7.3.2 </span>Calibration intervals</div>

<div data-id="7-7.3-7.3.3" style="text-align:left"><span>7.3.3 </span>Outside specification</div>

<div data-id="7-7.3" style="text-align:left">7.3 Working Standards</div>

<div data-id="7-7.4" style="text-align:left">7.4 Records</div>

<div data-id="7-8" style="text-align:left">8 Calibration Equipment for Measurement Transformers</div>

<div data-id="7-8.1-8.1.1" style="text-align:left"><span lang="en-US">8.1.1 Temperature tolerance</span></div>

<div data-id="7-8.1-8.1.2" style="text-align:left"><span lang="en-US">8.1.2 Calibration intervals</span></div>

<div data-id="7-8.1" style="text-align:left">8.1 Reference Standards</div>

<div data-id="7-8.2" style="text-align:left">8.2 Records</div>

<div data-id="7" style="margin-left:0.5in;text-align:left;text-indent:-0.5in">7 CALIBRATION EQUIPMENT FOR METERS</div>

<div data-id="appendix-a-calibration-period-table" style="margin-left:0.5in;text-align:left;text-indent:-0.5in">APPENDIX A. CALIBRATION PERIOD TABLE</div>

<div data-id="appendix-b-test-points" style="margin-left:0.5in;text-align:left;text-indent:-0.5in">APPENDIX B. TEST POINTS</div>

<div data-id="appendix-c-measured-errors" style="margin-left:0.5in;text-align:left;text-indent:-0.5in">APPENDIX C. MEASURED ERRORS</div>

<div data-id="appendix-d-measurement-uncertainty" style="margin-left:0.5in;text-align:left;text-indent:-0.5in">APPENDIX D. MEASUREMENT UNCERTAINTY</div>

<div data-id="appendix-e-annual-report-format" style="margin-left:0.5in;text-align:left;text-indent:-0.5in">APPENDIX E. ANNUAL REPORT FORMAT</div>

CONTENTS

Code of Practice 4: The Calibration, Testing and Commissioning Requirements of Metering Equipment for Settlement Purposes V18.0