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USER’S MANUAL

S E M S

- 18 -

You can at anytime stop the “Best Dynamic” function
Pressing the “Abort” button will show the menu below

Sems UnZeroed

Calibration Aborted

** Above Minimum **

Show

Cal

ll

ll

ll

ll

Anyway, you can view all the values of dynamic available for each frequency point
with the command “Show”, before to start the measuring:

Sems

Ready for Measuring

Meas Show

Cal

Snif

ll

ll

ll

ll

And after “Dyn”

Sems

Ready for Measuring
** Above Minimum **

Dyn

L1-4 M1-4 H1-4

ll

ll

ll

ll

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Summary of Contents for SEMS

Page 1: ... Italy Tel 39 0641200744 Fax 39 0641200653 info gruppompb com www gruppompb com MPB 2014 ver 2_9 User s manual SEMS SEMS LIGHT Shielding Effectiveness Measurement System Updated to the software Version SEMS RX 1 32 SEMS TX 1 05 SEMS PC Utility 1 26 ...

Page 2: ...anual has been produced tested and left the factory in conditions that fully comply the European standards To maintain it in safe conditions and ensure the correct use these general instructions must be fully understood and applied before using the product The SEMS is designed for industrial environment and laboratories and should be used by skilled staff only MPB disclaims responsibility for a di...

Page 3: ... that the product SEMS SEMS LIGHT Measurement system of shielding effectiveness complies with the following European Standards Safety CEI EN 61010 1 2002 EMC EN 61326 1 2007 This product complies with the requirements of the Low Voltage Directive 2006 95 CE and with the EMC Directive 2004 108 CE MPB S r l ...

Page 4: ... 1 Turn on menu 3 2 Std Menu 3 2 1 Cal Menu 3 2 2 High Dynamic HiDyn 3 2 3 Show Menu 3 2 4 Meas Menu 3 2 5 Menu Sniff 3 3 WIZ Menu 3 3 1 Measurements using wizard 3 4 STP Menu 3 5 Measuring the shielding attenuation 3 6 Calibration using CalKit 3 7 Measurement with Rod antennas mod R1 3 8 Unconnected mode 3 9 Prequiet mode 3 10 SEMS Light 13 13 14 16 20 21 23 24 27 31 33 34 36 37 44 46 4 SEMS PC U...

Page 5: ...ectiveness measurement system has a transmitter and a receiver both of them are provided with a pair of very small antennas to measure the magnetic and electric field attenuation Contrary to today s available systems that measure the shielding effectiveness on few frequency points SEMS allows to perform a complete test on the whole frequency ranges continuously Another improvement compared to the ...

Page 6: ...as Mod D1 40 300MHz RS 232 Wireless Key Bluetooth technology ü ü RS232 USB cable to download memory of the SEMS and for programming ü ü Battery Charges ü ü Carrying bag Mod SEMS CC ü ü Antenna adapters N m N m ü ü Cal Kit 4 attenuators 30 dB each Cal Kit Accredia Certificate Woden tripode Mod TR 02 Hight adjustable Optical link Mod LO with 20m fiber Software Mod SEMS SW ü ü User s manual onto USB ...

Page 7: ...E THE BEST DYNAMIC USER S MANUAL S E M S DYNAMIC WITH DIPOLE ANTENNA MODEL D1 Frequency range MHz Extended element 200 300 0 140 240 0 1 90 180 0 1 2 70 140 0 1 2 3 40 120 0 1 2 3 4 7 WITH DIPOLE ANTENNA MODEL D1 ...

Page 8: ...ront panel The SEMS transmitter Picture n 04 has no command button but only a power button and a led to indicate that the transmission is active since the commands are sent by the receiver using the wireless connection Picture n 04 Alphanumeric display Keyboard RF in 50 Ohm N female connector Power button RF out 50 Ohm N female connector Power button LED on when transmission is active ...

Page 9: ...r the tripod the battery charger connector and the RS232 interface for the wireless link Picture n 05 Important note Always use the battery charger provided with the instrument to avoid serious damages to the devices and operator s injuries Important note The battery charger must be connected to both devices Tx and Rx turned off RS232 Serial number Thread insert Battery charger connector ...

Page 10: ...285 IEEE Std 299 EN 50147 1 NSA65 6 Operating temperature 0 40 C Battery Irreplaceable and rechargeable Li Ion 6 h operating time Antennas Loop Mod L 1 Loop Mod L 2 Rood Mod R 1 Dipole Mod D 1 Loop Mod L 3 Biconical Mod B1 Frequency range 2 128 MHz Diameter 30 cm Frequency range 10 kHz 4 MHz Diameter 30 cm Frequency range 1 60 MHz Adjustables on lenght Frequency range 40 300 MHz Adjustable on exte...

Page 11: ...idth depending on the frequency settings Then the RF signal is converted by an ADC and is processed by the digital part with a RSP and a DSP the result will be shown on the display 2 2 SEMS Transmitter The block diagram below b represents the SEMS transmitter Digital CPU DDS Doubler Power amplifier RF OUT Figure b The transmitting signal is generated using the DDS controlled by the CPU that receiv...

Page 12: ... antenna and measures the signal level If we move the receiver inside the shielded environment maintaining the same distance from the transmitter we will get a lower signal so we can consider the shielding attenuation the difference between the reduced and the original signal Picture n 06 Example of zeroing with loop antennas 2 4 Power saving and recalibration The SEMS has an integrated timer in b...

Page 13: ...he TX device battery icon If the battery icon do not appear on the top left there isn t communication from the units Please check the configuration of the wireless Bluetooth Ind 3 5 page 32 SEMS FW 1 32 27 03 14 HW 2 WIZ Std Stp Ll ll Il ll NOTE As soon as the connection is established if the red led of the wireless devices blinks together with the yellow ones wait until the complete switching off...

Page 14: ...e the following screenshot where is possible to choose the default bands L_Lo L_Hi e Bic or the user s customized bands Sc1 Sc2 Sc3 and Sc4 pressing the User button customized bands are programmed with the SEMS PC_Utility software SEMS Ready for Measuring L_Lo L_Hi Bic User ll ll ll ll The choice of the button to press depends on the different types of antennas L_Lo Loop antennas Mod L2 L_Hi Loop ...

Page 15: ...sing the four 30 dB attenuators optional accessories CAL KIT NOTE This procedure needs a wireless connection between TX and RX you can control the connection with the battery status on the left top of the screen of RX will be visible only if the connection has been successful Note Never use the CalKit procedure with the charger connected When the zeroing procedure ends the following menu will appe...

Page 16: ...the test that could compromise the dynamic of the measure It s possible make a scanning in automatic or manual mode just press the Stp menu like show below SEMS FW 1 32 27 03 14 HW 2 BEEP Clear ll ll ll ll And after the Beep button BEEP ON 100dB Use arrows for 10 dB step 1 1 ON OFF ll ll ll ll BEEP ON OFF enables or disables the manual or automatic execution of the HiDyn Function With the arrows i...

Page 17: ...onfirming with OK the SEMS Receiver will proceed at the next frequency through the activation of the Best Dynamic function like below For every frequency present in the table two additional side frequencies are added the lower is f 0 99 1 and the higher is f 1 01 1 All the frequencies are then tuned on RX unit while the TX unit is kept OFF and for each the noise floor is recorded At the end of thi...

Page 18: ...Zeroed Calibration Aborted Above Minimum Show Cal ll ll ll ll Anyway you can view all the values of dynamic available for each frequency point with the command Show before to start the measuring Sems Ready for Measuring Meas Show Cal Snif ll ll ll ll And after Dyn Sems Ready for Measuring Above Minimum Dyn L1 4 M1 4 H1 4 ll ll ll ll ...

Page 19: ...ER S MANUAL S E M S 19 To view them one by one press the button NxFr Next frequency or HiPk highest Peak and NxPk next Peak than the one displayed Dynamic 9 900 to 126 000 1stF NxFr HiPk NxPk ll ll ll ll ...

Page 20: ...iously stored To see the saved measurements press the Show button e g We will choose a measure stored in a memory named H1 4 Then we recall the H1 memory SEMS Ready for Measuring Meas Show Cal Snif ll ll ll ll SEMS Ready for Measuring Last L1 4 M1 4 H1 4 ll Il ll ll SEMS Ready for Measuring H 1 H 2 H 3 H 4 ll ll ll ll ...

Page 21: ... remaining three buttons you can see the other stored data up to 4 for each button As soon as you choose the measure to see you can analyze frequency by frequency the measured attenuation The frequencies are always expressed in MHz By pressing the ESC button you can go back to the previous menu 3 2 4 Meas menu You can find the Meas command in the Std menu but it will appear only when the system is...

Page 22: ...r Measuring Now 10s 30s 60s ll ll ll ll If you use a manual measurement you will use the commands Prev measure of the previous frequency Next measure of the next frequency Redo in order to measure the current frequency and Abort to end the measurement To measure the electrical component we recommend to use Rod Antennas Mod R 1 completely open or the Biconical antennas Mod B 1 on RX and TX unit For...

Page 23: ...erent slot because the last frequency of the list is on overlap with another E g at 60 MHz you could have a slot of M or H Example Save request in the memory slots from 60 300 MHz range By pressing the H 1 button the data will be stored and you will go back to the starting screenshot 3 2 5 Snif Menu From this menu you can measure the shielding effectiveness on a single frequency for leak sniffing ...

Page 24: ... shielding effectiveness on the selected frequency displaying the current attenuation along with the maximum and minimum value in brackets 144 210005 MHz TX Tuned and Ready to 144 210005 Next Prev Meas ll ll ll ll 144 210005 MHz 112 4 134 4 Att 120 1 dB Stop Clear ll ll ll ll ...

Page 25: ...Mode see the relative section in this manual a full environmental investigation The devices need to communicate only during the selection of the frequency As soon as the frequency is selected you will read the message TX Tuned and Ready From now on you can remove all the connections and start the measurement You ll need to restore the communication between TX and RX units only if you need to chang...

Page 26: ...r where the measurements are performed A B C D Using A B C e D you can identify a shielded chamber Then the user has to remember the letter assigned to the chamber where the measurements were done Choice of the maximum number of spot to be measured 1 2 4 8 Represents the number of measuring spot assigned for each chamber The user must sort chronologically the measured spot and he will find the sam...

Page 27: ... selection of the chamber spots and ranges the instrument will start the procedure to perform the auto zero required by the first set of antennas to be used The procedure to follow for this purpose is exactly the same of the auto zero calibration as described in chapter 3 2 1 of this manual Selecting Scan we can choose to zeroing the system using the default mode L_Lo L_Hi BIC or to use the span p...

Page 28: ...o perform the measurements automatically Auto or manually Man Choosing the automatic mode we can make it start immediately Now or set a fixed time countdown before starting 10s 30s e 60s Fully Zeroed Ready for Measuring Now 10s 30s 60s ll ll Ll ll Choose the range for Antenna 1 Zero L_Lo L_Hi Bic User ll ll Ll ll Fully Zeroed Ready for Measuring Auto Man PreQ ll ll Ll ll ...

Page 29: ...ar the wizard management screenshot to control the status of the procedure In this screenshot Ch A means that the chosen chamber is called A Sp 1 2 is the measurement spot index in this case the spot is the 1st of the 2 R 1 2 is the antennas system range that we are using in this case we are using the first system of the 2 Spot Done means that the measurement is completed for this spot with the in...

Page 30: ...e of the maximum attenuation The End button stops the measurements with the current set of antennas By pressing it the instrument will ask us to change the antennas and to start the auto zero procedure if the antennas systems have all been selected the procedure will end with a message of success about the storing of the data and you will go back to the main screenshot WARNING Pressing the End but...

Page 31: ...EP OFF 100dB Use arrows for 10 dB step 1 1 ON OFF ll ll ll Ll Using the up and down arrows on the SEMS keyboard is possible to move the threshold to 10 dB to set a more fine value is possible to press the 1 and 1 buttons to increase or decrease the threshold to 1 dB By pressing the ON button the buzzer will be activated and during the measurements if the attenuation measured drops below the thresh...

Page 32: ...f sounds The OFF button will take the sound off The sound mode status is reported on the top of the display in this menu BEEP ON and BEEP OFF The actual threshold is written on the right top of the screen in this example is 100 dB Clear With this function you can delete all the measure stored inside the RX unit WARNING ALL Measures Will be ERASED Abort OK ll ll ll ll Pressing OK Memory cleared No ...

Page 33: ...t Scan or List for the desired frequencies other zeroing mode is available to improve the dynamic during measure See Chapter HiDyn 5 As soon as the zeroing procedure is over move the receiver into or out the shielded environment near the first measurement point and the transmitter in the opposite side trying to maintain the same distance used during the zeroing plus the shield tickness 6 Measure t...

Page 34: ... then calibration can be performed following the instructions on the display This screenshot shows the request for the 30 dB attenuator Connect the Tx and Rx using the 30 dB attenuator and press the OK button This screenshot shows the request for the second attenuator Connect the second attenuator and then press the OK button Repeat the same operation until you will use all the four 30 dB attenuat...

Page 35: ... 20 000 kHz 120 dB Show Cal ll ll ll ll The Worst parameter shows the worst accuracy over frequencies in this case is 0 7 dB at 20 000kHz typically is a parameter that you can find in the technical specifications of the chamber 10 kHz 30MHz 1 0dB 30 MHz 300MHz 1 5dB The following image show the procedure set up Picture n 08 ...

Page 36: ...ennas in the zero setting and in the measurement phase it s absolutely necessary to connect the SEMS TX 10 dB attenuator already supplied before connecting the Rod antenna picture n 09 WARNING not using the attenuator can cause serious troubles to the system functionality Picture n 09 ...

Page 37: ...s no need of a connection between the RX and TX unit To use this operating mode the SEMS RX must be programmed through the SEMS Software with a specific list of no more than 20 frequencies The list can be saved in any of the three L1 3 slots The Unconnected mode can be used either in the Wizard or in the Standard mode To use it in Standard mode select Std from the home menu Press Cal then List and...

Page 38: ...rnal clock Note that you have to make this step while the 2 batteries are visible on the LCD display Now you can remove the RS232 Wireless adapter from the RX unit you ll see the battery icon of the TX Unit that disappears close the door of the shielded environment and start measuring SEMS Ready for Measuring Auto Man PreQ Unc ll ll ll Il Remove Connections and start measuring Now 10s 30s 60s ll l...

Page 39: ...mber of frequencies you entered in the list After the first measurement you ll see that before each frequency there is a synchronization delay As soon as the measurement ends you can save the data in a memory slot just like in a normal Standard measurement 5 000000 MHz Sync in 12 s Abort ll ll ll ll 10 000000 MHz Sync in 2 s Att 88 0 dB Abort ll ll ll ll ...

Page 40: ...o units However you can do this only for a fixed period of time see below The usage of this mode in a Wizard measurement works in a very similar way You can start a wizard zeroing sequence by selecting the list you programmed for the unconnected mode as the only range SEMS Ready for Measuring Auto ll ll ll Il Fully Zeroed Ready for Measuring Auto Man PreQ Unc ll ll ll Il ...

Page 41: ...you can remove the RS232 Wireless adapter from the RX unit you ll see the battery icon of the TX Unit that disappears close the door of the shielded environment and start measuring You ll see a countdown starting from a value that can vary according to the moment in which you started the measurement and the number of frequencies you entered in the list Remove Connections and start measuring Now 10...

Page 42: ...measurements before reconnecting the RX and TX unit This time limit is used to avoid measurement errors imputable to long term clock delays The timer starts from the moment in which you press the Unc button After 14 minutes if you start a measurement you will be prompted to reconnect the TX and RX unit to recalibrate the internal clocks At this point you must reconnect the RS232 Wireless adapter w...

Page 43: ...fails keep in mind that after 17 minutes the TX Unit turns off automatically you will see the following screen And after pressing OK In this case check the TX connection and if needed turn on the unit Then try again by pressing OK Sync OK Remove Connections Abort OK ll ll ll ll Synchronizing Transmitter Abort OK ll ll ll ll Could not Sync Failed Is TX connected Abort OK ll ll ll ll ...

Page 44: ...X modifies the working frequencies so that the environmental noise is kept out of the measurement points The Prequiet mode is available in both Wizard and Standard mode but it can t be used together with Unconnected mode In both cases you have to do the zeroing of the system then in the Meas menu you ll find the PreQ button In Standard mode And in Wizard mode SEMS Ready for Measuring Auto Man PreQ...

Page 45: ... As soon as the quieting procedure finishes you can start the measurement By pressing Meas and starting a measure the SEMS will automatically use the optimized frequency list Quieting Terminated Meas Show Cal Snif ll ll ll ll ...

Page 46: ...max frequency until 96 MHz In the Stp menu it s possible upgrade the RX Unit through the activating code from SEMS LIGHT to SEMS so you can working until 300 MHz Note The activating Code is an option Mod Key 300 SEMS FW 1 32 27 03 14 HW Light WIZ Std Cal Stp Il ll ll Il SEMS FW 1 32 27 03 14 HW Light BEEP Clear Code0 Il ll ll Il Please enter CODE Enter to confirm 0 1 2 3 Il ll ll Il ...

Page 47: ...USER S MANUAL S E M S 47 After you unlock the SEMS LIGHT the display will show And then you will be ready to measure until 300 MHz Code saved Turn the SEMS OFF then on again Abort OK Il ll ll Il ...

Page 48: ...the software to Launch the setup file SEMS SW exe and click YES in the pop up window Vista and Seven users only According to your computer settings SEMS SW Installer will have on screen instruction in different language Follow the instructions on screen to complete the installation Be carefull For the OS Windows 7 and upper you must launch the SEMS SW with all administrator permission ...

Page 49: ...M port where the USB to Serial interface is mapped I E COM3 5 Connect the SEMS RX to the RS232 connector and turn on the unit 6 Start the SEMS SW from the desktop shortcut or your start menu 7 Open the Option menu click on Select Comm and in the new window insert the number you ve taken note before Press the Enter key on your keyboard to confirm The program should be now correctly configured to co...

Page 50: ...MS memory Set of Measure will download data relative to a specific room data set Get CalK Report will download data relative to the calibration procedure a TXT file with the report will be created By clicking on the desired element and then pressing Retrieve data will be downloaded from the SEMS internal memory and shown on the main window you will be asked to save an optional record file for latt...

Page 51: ...e data currently shown on the screen with the retrieved measure and allows you to save the measure as a record file SMR To correlate the memory slot to the index of the measure you can refer to the following table Memory Slot Index L1 0 L2 1 L3 2 L4 3 M1 8 M2 9 M3 10 M4 11 H1 16 H2 17 H3 18 H4 19 To consult this measure again just use the Load button from the File menu and select the relative reco...

Page 52: ...lative to a chamber you have to click on Retrieve Set of Measure from the Tools menu then select the dataset from the pop up window In this example we are retrieving data from Chamber B Range 1 As you can see the window is showing the number of measures relative to each set in this case 4 different spots ...

Page 53: ... used all the measurement spots By selecting one of the SMR files the main window updates data with the one relative to the spot selected In addition a new window appears to allow easy navigation between the measurement spots In the lower part of this window you can navigate through the work folder and select the desired chamber range in the top part of the window the measurement spots contained i...

Page 54: ...of frequencies or a scanning and store them inside RX unit The picture below is the menu for programming If you want use the Scanning you must select the start stop frequency and choose the step in percentage To make a table list you must click on the Write List button And then store it inside the RX Unit clicking on one of the four available memories ...

Page 55: ...requencies List you must select the Insert button write the frequency value in the near area and push again the insert button Proceed in the same way to modify or remove a frequency value You must insert minimum three frequencies to enable the box below Proceed to save the data inside the RX unit clicking on one of the three button ...

Page 56: ...USER S MANUAL S E M S 56 Note During programming to enable the functions Unconnected Mode Make max 20 Frequencies HiDyn Mode Make max 30 Frequencies ...

Page 57: ...nd inserting the desired value You can change the diagram data from Attenuation to Shielding Effectiveness from Options Diagram Style Using the File menu you can save or load a record file or export data in CSV ASCII format By clicking any point in the graph you can place a marker showing the attenuation of the closest measurement point if the box is Yellow the measurement point is below the instr...

Page 58: ...the same way Be sure that the firmware files are located in the SEMS Software folder batteries and connect it to the PC using RS232 cable run the SEMS Software and set the COM port in the Option menu To verify the assignation of the COM port assigned by the PC check in the control panel System Hardware peripheral ports To start the firmware update procedure click the Tools button Update Firmware a...

Page 59: ...ated in the SEMS software directory Press the Update Firmware button and wait for the loading When the upgrade is completed close the window and turn off the receiver Other information www gruppompb com Technical information assistenza gruppompb com Phone 39 06 41200744 ...

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