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LAPLACE INSTRUMENTS RF300 Mk II-A User manual

Manual is about: Large Loop Antenna (Van Leen Loop) 2 metre diameter

Summary of RF300 Mk II-A

  • Page 1

    Laplace instruments ltd page 1 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 2

    Laplace instruments ltd page 2 this page intentionally blank.

  • Page 3: Index

    Laplace instruments ltd page 3 index 1.0 introduction 2.0 packing list 3.0 assembly 4.0 calibration loop 5.0 calibration 6.0 operation appendix a. Calibration data b. Latest changes to standards cispr15 & cispr16..

  • Page 4

    Laplace instruments ltd page 4 this page intentionally blank.

  • Page 5

    Laplace instruments ltd page 5 1.0 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...

  • Page 6

    Laplace instruments ltd page 6 2.0 packing list on receipt of the rf300, check the contents of the packages against the diagram shown in fig 1. Identify each component and check for shortages. Qty 4 corner posts qty 3 loops qty 4 base extensions qty 3 loop transducers switch unit with cable central ...

  • Page 7

    Laplace instruments ltd page 7 quantity item 2 plates a 2 plates b 4 plates c 8 plates d 3 loop antennas (blue) 4 corner posts 4 base extensions 1 central pillar 4 saddle clips 31 grip screws (m10) 31 grip nuts (m10) 8 m6 x 12 screws and nuts 3 loop transducers (current sensors) 1 switch unit 1 shor...

  • Page 8: 3.0  Assembly

    Laplace instruments ltd page 8 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.. Note that the plates have tapered holes t...

  • Page 9

    Laplace instruments ltd page 9 3.2 stage 2 corner post assembly 2(a) ….Add plate c to the base of each corner 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. 2(b)…. Add the 2 plates d to e...

  • Page 10

    Laplace instruments ltd page 10 3.3 assembly of loops the frame should now look like that shown in figure 8. The next steps are to add the loops. 3.3(a) the configuration of these loops is as shown in fig 9 and fig 10. The connectors on each end of the loop are mated with the sockets either side of ...

  • Page 11

    Laplace instruments ltd page 11 3.3(b) install the first loop on the stand. This is the horizontal orientation. This task requires at least 2 persons. The loop will simply rest in the slots at the top of the corner posts. Locate the current transducer close to one of the corner posts. It will be fou...

  • Page 12

    Laplace instruments ltd page 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 pillar and is held by the saddle clips at the top of the corner posts (fig 13)...

  • Page 13

    Laplace instruments ltd page 13 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. 3.3(e). The loops can now b...

  • Page 14

    Laplace instruments ltd page 14 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...

  • Page 15

    Laplace instruments ltd page 15 4.0 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. The rf300 is supplied f...

  • Page 16

    Laplace instruments ltd page 16 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. Slot the central pillar of the calibratrion assembly int...

  • Page 17

    Laplace instruments ltd page 17 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. 4.3(b) vertical axis locate the vertical adaptor over the top spigot. Add the washer to the horizontal stub, then the loop antenna. Reta...

  • Page 18

    Laplace instruments ltd page 18 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 id...

  • Page 19

    Laplace instruments ltd page 19 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. The position is not critical. ...

  • Page 20

    Laplace instruments ltd page 20 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 ...

  • Page 21: Appendix A

    Laplace instruments ltd page 21 appendix a calibration data 1. Cispr16 ‘ideal’ plot 2. Calibration data. 3. Rf300 actual sensitivity plots and rf300 correction plot (antenna factor).

  • Page 22

    Laplace instruments ltd page 22 this page intentionally blank.

  • Page 23

    Laplace instruments ltd page 23 en55015 standard antenna response cispr16 lla (2m diameter) 60 65 70 75 80 85 90 95 100 105 110 0.01 0.1 1 10 100 freq (mhz) v a li d a ti on f a c to r (d b o h m s).

  • Page 24

    Laplace instruments ltd page 24 this page intentionally blank.

  • Page 25

    Laplace instruments ltd page 25 calibration data 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: checke...

  • Page 26

    Laplace instruments ltd page 26 this page intentionally blank.

  • Page 27: Appendix B

    Laplace instruments ltd page 27 actual output plots for the loops output antenna factor appendix b output - rf300 s/n 9108 0.00 10.00 20.00 30.00 40.00 50.00 60.00 70.00 80.00 0.01 0.10 1.00 10.00 100.00 frequency (mhz) ou tpu t (d b u v) antenna factor rf300 s/n 9108 -30.00 -25.00 -20.00 -15.00 -10...

  • Page 28

    Laplace instruments ltd page 28.

  • Page 29: Appendix B

    Laplace instruments ltd page 29 appendix b changes to standards cispr15 and cispr16, 2009.

  • Page 30

    Laplace instruments ltd page 30 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 cispr16-1-4:2007 + a1:2008...

  • Page 31

    Laplace instruments ltd page 31 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. Note 2 cispr15 gave the verification data as a plot of loop current in dbua...

  • Page 32: Laplace Instruments Ltd

    Laplace instruments ltd page 32 laplace instruments ltd tudor house grammar school road north walsham norfolk nr28 9jh uk 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.