Related Manuals for LAPLACE INSTRUMENTS RF300 Mk II-A
Summary of Contents for LAPLACE INSTRUMENTS RF300 Mk II-A
- Page 1 Laplace Instruments Ltd LAPLACE INSTRUMENTS LTD RF300 Large Loop Antenna (Van Leen Loop) 2 metre diameter Mk II-A USER MANUAL Ver 2.00 October 2011 Serial number: XXXX Page 1...
- Page 2 Laplace Instruments Ltd This Page intentionally blank Page 2...
-
Page 3: Table Of Contents
Laplace Instruments Ltd Index Introduction Packing List Assembly Calibration loop Calibration Operation Appendix Calibration data Latest changes to standards CISPR15 & CISPR16. Page 3... - Page 4 Laplace Instruments Ltd This Page intentionally blank Page 4...
-
Page 5: Introduction
Laplace Instruments Ltd Introduction The RF300 large loop antenna has been developed to meet the requirements of EN55015: 2006 + A2: 2009, section 9.9.1, which refers to CISPR16-1-4: 2007 + A1: 2008 section 4.6.1. This specifies the limits for magnetic field induced current for luminaires with lamp operating frequencies in excess of 100Hz. -
Page 6: Packing List
Laplace Instruments Ltd 2.0 Packing List On receipt of the RF300, check the contents of the packages against the diagram shown in fig 1. Qty 31 Grip Qty 31 Grip Qty 8 Qty 8 Screws and Screws and Plate D... - Page 7 Laplace Instruments Ltd Quantity Item Plates A Plates B Plates C Plates D Loop antennas (Blue) Corner posts Base extensions Central pillar Saddle Clips Grip screws (M10) Grip nuts (M10) M6 x 12 screws and nuts Loop transducers (current sensors) Switch Unit Short BNC—BNC cable, patch cable...
- Page 8 Laplace Instruments Ltd 3.0 Assembly 3.1 Stage 1 Central sub-assembly Establish a clear area with a level floor clear of metallic structures and having a 3m clearance height. 1(a)….Secure Plates A to the central pillar using the supplied grip screws..
- Page 9 Laplace Instruments Ltd 3.2 Stage 2 Corner post assembly Corner Corner 2(a) ….Add plate C to the base of each corner post post post using 2 grip screws. Repeat for the other corner posts. Note that the plate is fitted on the opposite side to the 2 mounting holes at the top of the post.
- Page 10 Laplace Instruments Ltd Assembly of Loops The frame should now look like that shown in Figure 8. The next steps are to add the loops. Figure 8 3.3(a) The configuration of these loops is as shown in fig 9 and fig 10.
- Page 11 Laplace Instruments Ltd Screw loops connectors into Screw loops connectors into transducer sockets. Do not transducer sockets. Do not force, adjust alignment to ease force, adjust alignment to ease tightening tightening BNC outlet for cable to selector BNC outlet for cable to selector...
- Page 12 Laplace Instruments Ltd Figure 12 3.3(c.) The second loop is now fitted. Figs 12 and 13 show the details. This loop is fitted inside the first (horizontal) loop, orientated so that it fits in the lower ‘slot’ in the central...
- Page 13 Laplace Instruments Ltd 3.3 (d). The final loop is now fitted INSIDE the other two. See fig 14. This fits in the upper slot in the central pillar and under the other vertical loop at the top. Again arrange the loop so the transducer is close to the central pillar.
- Page 14 Laplace Instruments Ltd 3.4 Mounting the EUT Within the loop, construct a wooden stand or table to suit the products to be tested. This is not included with the RF300 because it needs to be matched to individual customers requirements. The stand should hold the product roughly central within the loop.
- Page 15 Laplace Instruments Ltd Calibration loop (RF300C) The RF300C calibration loop is manufactured to comply with CISPR16. Full details of the use of this loop are provided in this standard. This item (RF300C) is available as a separate option to go with the RF300 LLA.
-
Page 16: Assembly
Laplace Instruments Ltd 4.2 Assembly Mount the table on the 4 legs. These just slot into the recess on the underside of the table. Locate the table in the centre of the RF300, with the centre in line with the central pillar of the LLA. - Page 17 Laplace Instruments Ltd 4.3(a) Horizontal axis Locate the washer over the top spigot on the cenral pillar, then locate the loop antenna on this top spigot. Figure 20 4.3(b) Vertical axis Locate the vertical adaptor over the top spigot. Add the washer to the horizontal stub, then the loop antenna.
-
Page 18: Calibration
Laplace Instruments Ltd 5.0 Calibration The calibration technique is fully described in CISPR16. It requires the use of a signal generator covering the range 9KHz to 30MHz with a 50ohm output that is calibrated for 1v rms emf. See appendix A The calibration data for each loop is virtually identical. -
Page 19: Operation
Laplace Instruments Ltd 6.0 Operation Details of the measurements and limits are given in EN55015, section 4.4. A copy of this should be consulted if performing compliance tests. The UUT should be mounted on a wooden frame or table in the centre of the antenna. - Page 20 Laplace Instruments Ltd and can be compared directly with the limit lines. 7. ALWAYS check for compression (overload) when taking measurements. The amplitude of the reading on the screen cannot be used directly as a guide for compression because the readings have been adjusted for the RF300 characteristics.
- Page 21 Laplace Instruments Ltd APPENDIX A CALIBRATION DATA CISPR16 ‘ideal’ plot Calibration data. RF300 actual sensitivity plots and RF300 correction plot (Antenna Factor) Page 21...
- Page 22 Laplace Instruments Ltd This Page intentionally blank Page 22...
- Page 23 Laplace Instruments Ltd EN55015 Standard antenna response CISPR16 LLA (2m diameter) 0.01 Freq (MHz) Page 23...
- Page 24 Laplace Instruments Ltd This Page intentionally blank Page 24...
-
Page 25: Calibration Loop
0.00 30.00 30.00 -17.00 Calibration sources Laplace Instruments Ltd, RF300C calibration loop to CISPR16, annex C5. Laplace Instruments Ltd, SA1002 Spectrum analyser s/n 1010 Calibration: Laplace: 16.03.2009 Marconi TF2016A signal generator, s/n 118032/004 Calibration: Checked against Marconi TF2019A, s/n 118449-169 Advantest R4131D calibrated by Schaffner, 20.11.02 and checked against... - Page 26 Laplace Instruments Ltd This Page intentionally blank Page 26...
-
Page 27: Antenna Factor
Laplace Instruments Ltd Appendix B Actual output plots for the loops Output Output - RF300 s/n 9108 80.00 70.00 60.00 50.00 40.00 30.00 20.00 10.00 0.00 0.01 0.10 1.00 10.00 100.00 Frequency (MHz) Antenna factor Antenna factor RF300 s/n 9108 15.00... - Page 28 Laplace Instruments Ltd Page 28...
- Page 29 Laplace Instruments Ltd Appendix B Changes to standards CISPR15 and CISPR16, 2009 Page 29...
- Page 30 Laplace Instruments Ltd Technical Report Laplace Instruments Ltd January 2010 RF300 Large loop antenna, an analysis of changes to the standards These changes are due to the amendments to CISPR15 and CISPR16 The latest versions are now ….. CISPR15:2006 + A2:2009 and...
- Page 31 Laplace Instruments Ltd Note 1. The details of the LLA were given in Annex B of CISPR15. These are now transferred to Annex C of CISPR16. Most of the content has remained the same, but Table 1 summarises the changes.
- Page 32 Laplace Instruments Ltd LAPLACE INSTRUMENTS LTD Tudor House Grammar School Road North Walsham Norfolk NR28 9JH Tel: +44 (0) 16 92 40 20 70 Fax: +44 (0) 16 92 40 49 10 Web: www.laplace.co.uk E: tech@laplace.co.uk Page 32...
Need help?
Do you have a question about the RF300 Mk II-A and is the answer not in the manual?
Questions and answers