LAPLACE INSTRUMENTS RF300 Mk II-A User Manual Download

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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

Summary of Contents for 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...

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Page 3: ...ace 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 CIS...

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Page 5: ...tandard and details of the calibration factors are included in this manual These antenna factors should be added to the results to obtain correct measurements that can be compared directly with the li...

Page 6: ...B attenuator Qty 1 5m cable Qty 3 loop leads Qty 31 Grip Screws and qty 31 grip nuts Qty 2 Plate A Qty 2 Plate B Qty 4 Plate C Qty 8 Plate D Qty 4 Saddle clips Qty 8 M6 x 12 screws Qty 8 M6 nuts Qty 4...

Page 7: ...lue 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 Short BNC BNC cabl...

Page 8: ...grip screws Note that the plates have tapered holes to mach the taper on the grip screws so ensure that these plates are assembled correct way round 1 b Secure Plates B as shown in fig 3 1 c Place the...

Page 9: ...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 each corner post as shown In Fig 6 2 c Secure the corner posts to the outer end o...

Page 10: ...g 9 and fig 10 The connectors on each end of the loop are mated with the sockets either side of each loop transducer The retaining ring on each connector needs to be screwed firmly to the socket but t...

Page 11: ...rotating it relative to the stand and or inverting it an optimum position can be found which results in the flatest loop Note that there is no requirement for a perfectly flat loop Some vertical displ...

Page 12: ...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 Arrange the loop so that the transducer is within 20 cm of the...

Page 13: ...ion by using the saddle clips on each corner post to take some on the weight of the loop The top of the vertical loops can be adjusted for best shape and the two loops fastened together with the tiewr...

Page 14: ...RF absorber filters along their length Fit the cables so that these filters are nearest to the switch unit The switch unit is intended for floor mounting or may be mounted on a suitable table if pref...

Page 15: ...ibration loop is available to those who wish to check the calibration at regular intervals and to ensure that the calibration is not affected by the environment 4 1 Shipping list Main table Loop anten...

Page 16: ...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 into th...

Page 17: ...ertical axis Locate the vertical adaptor over the top spigot Add the washer to the horizontal stub then the loop antenna Retain both items with the grip screw The calibration antenna can be rotated to...

Page 18: ...factor data for the RF300 are also given This antenna factor correction data effectively converts the output from the RF300 measured in dBuV directly to dBuA The data can be used with any analyser or...

Page 19: ...ill indicate units of dBuA If this item is not available you need a later version of the software Contact your supplier 2 Under the limits menu select the EN55015 2m loop antenna limit line 3 Connect...

Page 20: ...have been adjusted for the RF300 characteristics If it is suspected that the signals are too strong even with the attenuator switched in install the 10dB attenuator in the input lead to the switch uni...

Page 21: ...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...

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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 Validation factor dBohms...

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Page 25: ...10 00 0 04 48 00 48 00 48 00 0 04 48 00 48 00 48 00 0 00 0 04 46 5 0 04 1 50 0 10 57 00 57 00 57 00 0 10 57 00 57 00 57 00 0 00 0 10 46 5 0 10 10 50 0 50 68 00 67 00 68 00 0 50 67 67 68 00 67 00 1 00...

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Page 27: ...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 Output dBuV Antenna factor RF300 s n 9108 30 00 25 00 20 00 15 00 10 00...

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Page 29: ...Laplace Instruments Ltd Page 29 Appendix B Changes to standards CISPR15 and CISPR16 2009...

Page 30: ...nnex C Clause B1 Clause C1 Introduction Loop antenna named LAS Loop Antenna System Clause B2 Clause C2 Construction of LAS Additional requirements for cables and connectors Clause C3 Construction of l...

Page 31: ...CISPR16 defines the validation factor dB 20 log Vs Ii where Vs is the source voltage and Ii is the loop current Vs 1V 1 000 000uV Under old CISPR15 for Ii 100KHz 46dBuA 200uA So the new CISPR16 value...

Page 32: ...e 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...

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