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Related Manuals for 3M ScanEM-QC CTK019
Summary of Contents for 3M ScanEM-QC CTK019
- Page 1 ScanEM-QC ™ Electromagnetic Near-Field Probe Kit Model CTK019 User’s Guide...
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Page 2: Table Of Contents
Table of Contents Contents of the kit ..................3 Product description ..................4 ScanEM-QC Electromagnetic Near-Field Probe Kit ™ controls and connector .................. 6 Using ScanEM-QC Probe ................7 Basics of operation ....................7 Stand-alone operation ....................8 Quick set-up ......................8 Setting the level dial....................9 Sound on/off ......................10 EM level LED bar ......................10 Operation as a probe ..................11... - Page 3 Î The ScanEM-QC Kit is designed for product-level EMC pre-compliance and diagnostics, as well as for ESD Audit. For EMC board-level diagnostics use ScanEM-C Kit model CTK015—please visit www.3m.com/static Scan EM-QC Contents The ScanEM-QC Kit, model CTK019 consists of: ‰...
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Page 4: Product Description
(close to the radiating object). The 3M ScanEM-EQC Probe detects the radiated electric component of ™ the electromagnetic field and the 3M ScanEM-HQC Probe reacts to the ™ magnetic conductive emission propagated over the cables. - Page 5 ScanEM-QC Electromagnetic Near-Field Probe provides both AC ™ and DC outputs. The ScanEM-QC Probes serve as: broadband amplified probes for a spectrum analyzer, as non-contact high-bandwidth voltage ScanEM-EQC Probe) and current (3M ScanEM-HQC Probes) probes ™ ™ for an oscilloscope and as broadband field strength probes for a multimeter.
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Page 6: Scanem-Qc Electromagnetic Near-Field Probe Kit Controls And Connector
ScanEM-QC Electromagnetic ™ Near-Field Probe Kit Controls and Connector Antenna Level Dial Sound Switch LED Level Bar Output This is the Adjusts the Turns sound Indicates Provides AC and ScanEM-QC’s reference level indicator On relative EM field DC output. antenna. of the EM field. -
Page 7: Basics Of Operation
ScanEM-EQC Probe in direct contact. The ScanEM-EQC Probe itself may be damaged as well if it is directly exposed to high voltage. The 3M ScanEM-HQC Probe, however, is ™... -
Page 8: Stand-Alone Operation
ScanEM-EQC Probe ™ The tip at the end of the ScanEM-EQC Probe is its antenna. Point it at the suspected area and keep it close to the measured spot without making contact. ScanEM-HQC Probe ™ Hold the ScanEM-HQC Probe in such a way that the cable that you are testing fits into the groove of the ScanEM-HQC Probe’s antenna. -
Page 9: Setting The Level Dial
In this case, point the ScanEM-QC Probe at an area of expected “average” emission on the tested product, and adjust the Level dial to the new background level. You can use the Level dial to put the 3M ScanEM-QC Probe in squelch ™... -
Page 10: Sound On/Off
These numbers are put there for convenience only so that the user can refer to them when recording relative field strength. You can use these numbers to “calibrate” your 3M ScanEM -QC Electromagnetic Near-Field ™... -
Page 11: Operation As A Probe
Operation as a Probe Basics The 3M ScanEM-QC Electromagnetic Near-Field Probe provides AC and ™ DC outputs to virtually any piece of test equipment: spectrum analyzer, oscilloscope, frequency counter or multimeter. Output is provided via an SMB connector and the supplied cable. For some types of test equipment you may need to use additional adaptors (typically, BNC-to-N or BNC-to- banana plugs). -
Page 12: Amplified Near-Field Probes For A Spectrum Analyzer
(see page 13 for details). The ScanEM-QC Probe’s built-in amplifiers provide ~20dB of gain, eliminating the need for an external pre-amplifier. Figure C shows a typical frequency response of the 3M ScanEM-EQC Probe vs. an ™ equivalent passive probe. As seen, passive... -
Page 13: Non-Contact Oscilloscope Probes
Typical response of ScanEM-EQC as a voltage probe Typical response of ScanEM -H Q C as a current probe Figure E: Typical Response of 3M Scan Figure F: Typical Response of a 3M ™ ™ EM-QC Probe as an E-Field Probe... - Page 14 ScanEM-QC Electromagnetic Near-Field Probe amplifies the signal ™ instead of attenuating it, allowing viewing even of the weakest signal on the screen. The ScanEM-EQC Probe measures an electrical radiated field that is a representation of the voltage in the circuit. The ScanEM-HQC Probe measures a magnetic field in the cable that is a representation of the current in that cable.
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Page 15: Broadband Field Strength Probe For A Multimeter
ScanEM-QC Probe with your hand — it may induce a feedback between typically non-shielded circuitry in a multimeter and the ScanEM-QC Probe antenna that just got many times bigger by virtue of your touching it. A typical transfer function of 3M ScanEM-EQC Probe is shown in the ™... - Page 16 A quick check with the 3M ScanEM-QC Probes will help prevent this. ™...
- Page 17 (4) the AC power cord. You will be looking for units that produce a probe response of at least four or five LEDs being lit. CAUTION! MAKE SURE THE MONITOR IS 12 OR MORE INCHES (30 CM) FROM THE 3M SCANEM-QC ™...
- Page 18 Checking for Radiated Emission with the 3M ScanEM-EQC ™ Electromagnetic Near-Field Probe 1. Calibrate the probe by moving it away from the product and setting the Level dial to light only the green LED. Take precautions to ensure that no extraneous RF fields are affecting the setting. To do this, compare the probe level setting at various places within the building.
- Page 19 Checking for Conducted Emission with the 3M ScanEM-HQC ™ Electromagnetic Near-Field Probe 1. Calibrate the probe by moving it away from the product and setting the Level dial to light only green LED. Take precautions to ensure that no extraneous RF fields are affecting the setting. A determination of this can typically be accomplished by comparing the probe level setting at various places within the building.
- Page 20 This will help you to pay more attention to potentially troubled spots. If you would like to “attach the numbers” to the test data, connect output of the 3M ScanEM-QC Electromagnetic Near-Field Probe to a multimeter so ™...
- Page 21 Monitoring the Signals You can monitor the signal on cables or wires without contact with the 3M ™ ScanEM-HQC Electromagnetic Near-Field Probe. Connect the output of the ScanEM-HQC Probe to an oscilloscope. Set the scope input coupling to AC. Place the cable or wire in the groove of the ScanEM-HQC Probe sensor and observe the waveform of the signal on the screen.
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Page 22: Analyzing The Results
Analyzing the Results If the 3M ScanEM-QC Electromagnetic Near-Field Probe indicates the ™ presence of electromagnetic field, it may not necessarily mean that your product has emission problems. It is normal for an electronic device to produce some electromagnetic noise. As you pass the ScanEM-QC Probe over the tested product, you may notice that the level of the electromagnetic field changes. - Page 23 If the offending frequency is well-known and if the field carrying it is not the strongest one in the product, a spectrum analyzer may be a more appropriate tool. If the 3M ™...
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Page 24: Troubleshooting
Often, excessive emissions radiate from a cable even though the cable itself doesn’t generate the signal—it just acts as an antenna. For board-level troubleshooting and diagnostics use the 3M ScanEM-QC ™ Electromagnetic Near-Field Probe Kit, model CTK015. -
Page 25: During The Design Phase
During the Design Phase This is the time to ensure agency compliance for your product at the lowest cost and with minimum impact on your schedule. The 3M ScanEM-QC ™ Electromagnetic Near-Field Probe can help you: ‰ Check your first fully or even partially working PCB assembly for “hot”... -
Page 26: Seeking Help
Excessive electromagnetic emissions may interfere with the normal operation of other products. Locating the sources of such emissions can help to restore normal operation. The 3M ScanEM-QC Electromagnetic Near-Field Probes deal ™... -
Page 27: The Validity Of The Near-Field Measurements
field is electric, or E-field. A conductor with a substantial current causing an H field still carries some small voltage that creates an E field, albeit small in magnitude. Similarly, an antenna or an unterminated wire still carries some current via parasitic capacitance to the ground. Electric and magnetic fields attenuate as distance from the source increases. -
Page 28: Esd Primer
The answer is simple: a near- field test, regardless of the test equipment used, provides only relative results. The near-field test can show where the emission is stronger and where it is weaker, and what type of field is dominant. The 3M ScanEM- ™... -
Page 29: Changing Batteries
Taking Care of Your ScanEM-QC Electromagnetic ™ Near-Field Probes To ensure your Scan EM-QC Probes have a long life: ‰ Do not drop them. ‰ Do not clean them with solvents that can damage plastic (i.e. acetone). ‰ Do not abuse them. ‰... -
Page 30: What If
‰ Holding both halves of the ScanEM-QC Probe as a single piece, flip it over face up ‰ Gently remove the top half of the enclosure. ‰ Pay special attention not to break wires of the 3M ScanEM-HQC Probe’s ™... - Page 31 ‰ Maybee you don’t have an emission problem Is it difficult to pinpoint at the exact location of the problem in a self-contained mode? ‰ The overall emission level may be too high. The 3M ScanEM-QC ™ Electromagnetic Near-Field Probe Kit could be confused if high-level emissions are coming from the sides and you are trying to locate a lower-level emission spot in the middle.
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Page 32: Specifications
The 3M ScanEM-QC Electromagnetic Near-Field Probe produces ™ warbled sound ‰ Quite often electromagnetic emission changes with time depending on what is going on in a circuit. The ScanEM-QC Probe may demodulate this signal just like an AM radio would. You may use this “warble” to detect activity in a circuit. - Page 33 3M’s Regulatory Information Sheet, then 3M’s entire liability and buyer’s exclusive remedy, will be at 3M’s option either: (i) replacement of product with a conforming product, or (ii) refund of the purchase price paid by buyer for each non-conforming product, within a reasonable time after written notification of said non-conformance and return of said product to 3M.
- Page 34 产品中有毒有害物质或元素的名称及含量 Name and Content of Hazardous Substances or Elements 有毒有害物质或元素 (Hazardous Substances or Elements) 部件名称 铅 汞 镉 六价铬 多溴 多溴二 (Part or Component Name) 联苯 苯醚 （Hg） （Cd） （Cr(VI)） (Pb） （PBB） （PBDE） ○ ○ ○ ○ ○ 电容引脚 × (Termination in capacitor) ○...
- Page 36 If this product is defective within the warranty period stated above, your exclusive remedy shall be, at 3M’s option, to replace or repair the 3M product or refund the purchase price of the 3M product. Except where prohibited by law, 3M will not be liable for any indirect, special, incidental or consequential loss or damage arising from this 3M product, regardless of the legal theory asserted.