PM200 Fiber Optic Power Meter
Contents
1. ON OFF Backlight button When the unit is off press this button to power on When the unit is on press this button to toggle the backlight on and off When the unit is on hold this button to power off A AUTO button Press this button to change wavelengths Hold this button to set the meter in AUTO mode AUTO mode scans incoming power for modulated optical signals and switches wave lengths automatically when a corresponding modulated signal is received for use with WaveSource light sources only UNITS ZERO button Press this button to change display units either dBm dB uW or mW Holding this button will set a ZERO reference for the currently selected wavelength 5 PM200V1 0 11 04 Operation 1 0 Applications 1 1 Precautions 1 1 1 Safety Caution must be exercised when working with optical equipment Most transmission equipment and light sources use light that is invisible to the human eye High energy light is potentially dangerous and can cause serious irreparable damage to the eye Thus it is recommended to look into the connector port of a light source or the end of a fiber 1 1 2 Operational In order to ensure accurate and reliable readings it is vitally important to clean ferrules containing optical fibers and optical connector ports If dirt dust and oil is allowed to build up inside connector ports this may scratch the surface of the photodetector producing erroneous results Replace dust caps after ea2. View However Summary view may be more useful for fiber loss test evaluation To switch between Summary View and Detail View press the button that looks like an arrow highlighted at the right After you press this button the view will change to look like the screen shot at the right This screen shows the Link ID each stored data point and whether the test passed or failed 1 8 8 Report Printing To print the current view to a PC printer press the print button highlighted at right to print the Summary report The printed report will look very much like the screen See an example report on the next page 19 PM200V1 0 11 04 1 8 9 Example Printout Below is an example of the Circuit Summary Report Below are descriptions of the columns Circuit ID this is the name of the fiber that was tested P F shows whether the test passed or failed 850nm shows the amount by which the test passed or failed by at the wavelength tested Circuit Summary Report unk Vere Teatey reo 1 Uampany NAME arma WABAR LMA C ZEUE Telophone Number 232 555 2269 Zirt ID Daie BE Him m nm Pate 117m o OOR27003 Mese 44500 u we Pa 176700 o 002003 Peso 6 1090 o 08221003 Paw 3938 R730 Pose EMA o 00227003 Fass 44608 a te Peek n OO227003 Mes 31700 10 OelvI o2 Pars 17408 00222009 Mas 3 2000 2 0e202003 Pass 2108 2 OUAI Pass 16098 u 08227003 Pass 31808 I BADIA Pace 13A gt i Manwali setretere
3. to holding the SAVE DOWNLOAD button on the PM200 This will download all data into the PC in comma delimited format The display will say done when the download is complete Key M Function Monitor mode Description Pressing the M key will cause the meter to send wavelength and power level information to the serial port This data will appear in the terminal window Monitor mode is useful for checking the stability and power level of a source over a long period of time Most terminal programs have a data capture function Data captured this way can be imported as a comma delimited file into a spreadsheet for creating a chart Key U Function Units set Description Pressing the U key is the equivalent to pressing the UNITS ZERO button on the PM200 Each time the U key is pressed the display units will change between dBm dB and uW or mW Key W Function Wavelength set Description Pressing the W key is the equivalent to pressing the AUTO button on the PM200 Each time the W key is pressed the display wavelength will change between the PM200 s calibrated wavelengths Key Z Function Zero function Description Pressing the Z key is the equivalent to holding the UNITS ZERO button on the PM200 Once the PM200 display changes to dB units an optical reference has been set for the currently selected wavelength otherwise known as zeroed Key Function Firmware vers
4. Power on the PM200 and set it to match the current wavelength of the light source d Check to make sure the power level displayed on the PM200 is approximately equal to the calibrated power level of the light source see Figure 2 on the previous page If it is good then remove it from the PM200 and light source and set it aside This will be the patch cord for the meter side e Connect the other patch cord to the PM200 and light source as shown in Figure 3 The example shows a reference setting procedure for multimode light sources Notice the insertion of a 1 2 mandrel Mandrels are used to achieve EMD Equilibrium Mode Distribution when setting the reference from a multimode light source EMD is achieved by wrapping the reference patch cord around the mandrel 5 7 times Single mode sources do not require a mandrel f Press the A AUTO button on the PM200 to set it to the desired wavelength g Set the light source to the match the wavelength on the PM200 h Press and hold the UNITS ZERO button on the PM200 This will set the reference for the currently selected wavelength The display will switch to show dB units and should show approximately 0 00 dB Figure 3 Ye MANDREL Lasek erer SINGLE MODE LASER SOURCE EXTECH Pm200 O If there is a second wavelength to zero repeat steps f through h The indicator LED will change colors for the second wa
5. User s Guide EXTECH INSTRUMENTS PM200 Fiber Optic Power Meter Optical Power Meter SS ee ee Introduction Congratulations on your purchase of the Extech PM200 Fiber Optic Power Meter The PM200 is a high accuracy high resolution optical power meter It is NIST traceable at 850 1300 1310 and 1550nm making it ideal for both single mode and multimode fiber testing The PM200 can store up to 100 measured datapoints This stored data can be downloaded via the software to produce formatted certification reports Careful use of this meter will provide years of reliable service Table of Contents Specifications Description Operation 1 0 Applications 1 1 1 2 1 3 1 4 1 5 1 6 1 7 1 8 1 9 Precautions 1 1 1 Safety 1 1 2 Operational Required Accessories 1 2 1 Cleaning Supplies 1 2 2 Patch Cords 1 2 3 Optical Fiber Adaptors Typical Applications 1 3 1 Optical Power Measurement 1 3 2 Optical Loss Measurement Optical Power Measurement Optical Loss Measurement Set Reference Optical Loss Measurement Data Storage Downloading Data into PC with Reporter Software 1 8 1 Standard Selection 1 8 2 Fiber Type Selection 1 8 3 Fiber Length Input 1 8 4 Connectors and Splices Input 1 8 5 Company Selection 1 8 6 Name Input 1 8 7 Summary View 1 8 8 Report Printing 1 8 9 Example Printout Clearing Data 2 0 PC Based Meter Control 3 0 Battery Replacement 4 0 PM200 Data Storage Error Codes Warr
6. a PC via the supplied serial cable Detector Port The detector port is a fixed 2 5mm universal port and connects to ST SC or FC connectors equally well without any loss of accuracy There is no need to change or maintain expensive adapter caps Tone Mode When Hz is visible on the display the PM200 is checking for the presence of a modulated optical signal These modulated signals are used to automatically switch wavelengths when they are sent by an OWL light source with modulation capability Power Reading The power reading displays the level of optical power being received by the photo detector and is displayed in either dBm dB milliwatts or microwatts Battery Indicator The battery indicator shows the amount of life is remaining in the battery Also when the battery recharger is in use the bars in the battery icon are animated to show that the recharger is active Data Indicator This icon shows whether there is data stored in the PM200 Units Indicator The units indicator shows which units are being currently displayed Units are shown in either dBm dB uW or mW Wavelength Indicator The wavelength indicator shows the currently selected wavelength in nanometers nm SAVE DOWNLOAD button To store a data point press this button Hold the button to down load data points in comma delimited format This button can also be used to erase all stored data if it is held while the meter is being powered ON
7. and is named Reporter There may also be a shortcut on the desktop Begin the data download by pressing the download button which is highlighted on the screen shot at the right The software automatically downloads all that is stored in the meter First the software searches for the meter then it transfers the data then gives a confirmation of download success If the download fails communications cannot continue and no data will download into the PC Check the cable connections test the current COM port and or try a different COM port or try a different PC The following pages explain the steps of the Link Wizard in Reporter This will allow certification of fiber links using a fiber cabling standard 12 PM200 V1 0 11 04 1 8 1 Standard Selection 1 8 1 1 View the list of cabling standards The list will appear when you click the down arrow 1 8 1 2 Select the cabling standard from the drop down list 1 8 1 3 Once the cabling standard has been chosen the wavelengths and fiber types that the standard supports appear in the boxes on the right Click Next to continue 13 PM200V1 0 11 04 1 8 2 Fiber Type Selection 1 8 2 1 View the list of available fiber types The list will appear when the down arrow is clicked 1 8 2 2 Select the fiber type from the list The selected fiber type should match the type of fiber of the link under test 1 8 2 3 Once the fiber type has been chosen it a
8. anty AON NN DDAADAAAVWWA DADA D HW PN NM PO NM NM MD AB BP Ba AB Basa ana na a FwWwWN A ODO DOAN DAF WHY O O PM200V1 0 11 04 Specifications Optical Specifications Detector Type Germanium Calibrated Wavelengths nm Measurement Range dBm Accuracy dB Resolution dB General Specifications Battery Life Optical Connector Data Storage up to Download Software Dimensions Weight with battery Ge 850 1300 1310 1550 5 to 60 0 15 0 01 100 hours 9 volt 2 5mm universal 100 storage points DB 9 serial Reporter 4 94 x 2 75 x 1 28 in 10 ounces 3 PM200 V1 0 11 04 Meter Description 1 Battery Charging Port 2 Download Port 3 Detector Port 4 Tone Mode 5 Power Reading 6 Battery bere B57 aan 7 Data Indicator ie FO ex 8 Units Indicator 9 Wavelength Indicator 10 SAVE DOWNLOAD button 11 ON OFF Backlight button Optical Power Meter EXTECH pman 12 A AUTO button 13 UNITS ZERO button 4 PM200 V1 0 11 04 10 11 12 13 Battery Charging Port If rechargeable 9 volt batteries are used in the PM200 the battery charging port is used to re charge them when used with an approved wall transformer NOTE DO NOT USE BATTERYCHARGING PORT WITH NON RECHARGEABLEBATTERIES THERE IS THE POTENTIAL FOREXPLOSION AND DAMAGE MAY OCCUR TO THE UNITAND OR THE USER Download Port The download port is used to download stored data into
9. cally disclaims any implied warranties or merchantability or fitness for a specific purpose and will not be liable for any direct indirect incidental or consequential damages Extech s total liability is limited to repair or replacement of the product The warranty set forth above is inclusive and no other warranty whether written or oral is expressed or implied Calibration and Repair Services Extech offers repair and calibration services for the products we sell Extech also provides NIST certification for most products Call the Customer Service Department for information on calibration services available for this product Extech recommends that annual calibrations be performed to verify meter performance and accuracy Seat a Support line 781 890 7440 Technical support Extension 200 E mail support extech com Repair amp Returns Extension 210 E mail repair extech com Product specifications subject to change without notice For the latest version of this User s Guide Software updates and other up to the minute product information visit our website www extech com Copyright 2004 Extech Instruments Corporation All rights reserved including the right of reproduction in whole or in part in any form 24 PM200V1 0 11 04
10. ch use 1 1 3 Operational In order to ensure accurate and reliable readings it is vitally important to clean ferrules containing optical fibers and optical connector ports If dirt dust and oil is allowed to build up inside connector ports this may scratch the surface of the photodetector producing erroneous results Replace dust caps after each use 1 2 Required Accessories 1 2 1 Cleaning Supplies It is recommended to clean fiber ferrules before each insertion with 99 or better isopropyl alcohol and a lint free cloth A can of compressed air should be available to dry off the connector after wiping and to blow out dust from bulkheads 1 2 2 Patch Cords Patch cords may be needed to connect the PM200 to the system under test The connector styles on the patch cord must match the type on the PM200 and the type of the system under test 1 2 3 Optical Fiber Adapters Optical fiber adapters are used to connect two connectorized fibers together and may be necessary to adapt your patch cords to the system under test 6 PM200V1 0 11 04 1 3 Typical Applications PM200 test kits can be used as diagnostic and measurement tools of optical transmission systems and fiber optic links These applications can be found in several industries including premise LAN CATV and Telco Two types of measurements are possible with the PM200 optical power meter optical power and optical loss 1 3 1 Optical Power Measurement When displaying po
11. eport software Fiber optic links can be certified against one of several popular fiber optic cabling standards or one of two user configurable standards Many fiber optic installation bids are requiring certification reports which makes the PM200 an invaluable tool for fiber optic professionals 7 PM200V1 0 11 04 1 4 Optical Power Measurement a b c d Connect the PM200 to the equipment under test EUT In the example below the EUT is a fiber optic light source Power on the EUT set it to the desired wavelength and allow it to stabilize Power on the PM200 and set it to match the wavelength of the EUT Set the units to dBm The resultant reading is the output power The example in Figure 2 shows an optical output power of 20 58 dBm This reading should be within the light source manufacturer s specified power level If the reading is not within the specification clean and check the connections and take another measurement 1310mm 1550mm Lase h erer SINGLE MODE LASER SOURCE EXTECH Figure 2 PM200V1 0 11 04 1 5 Optical Loss Measurement Set Reference Two patch cords are required for this procedure one for the meter side and one for the light source side a Connect the PM200 to a light source using the first patch cord b Power on the light source and allow it to stabilize according to the manufacturer s specifications c
12. ion display Description Pressing the button will send the firmware version to the serial port 22 PM200V1 0 11 04 3 0 Battery Replacement The battery compartment is covered by a sliding plate on the back of the unit Remove the rubber boot to expose the back of the unit One 9v battery is required for operation 4 0 PM200 Data Storage Error Codes ERR the user has not waited long enough to get data stored for both wavelengths BAD data can only be stored for a maximum of 3 wavelengths FUL memory is full and no more data can be stored 23 PM200V1 0 11 04 Warranty EXTECH INSTRUMENTS CORPORATION warrants this instrument to be free of defects in parts and workmanship for one year from date of shipment a six month limited warranty applies to sensors and cables If it should become necessary to return the instrument for service during or beyond the warranty period contact the Customer Service Department at 781 890 7440 ext 210 for authorization or visit our website www extech com for contact information A Return Authorization RA number must be issued before any product is returned to Extech The sender is responsible for shipping charges freight insurance and proper packaging to prevent damage in transit This warranty does not apply to defects resulting from action of the user such as misuse improper wiring operation outside of specification improper maintenance or repair or unauthorized modification Extech specifi
13. nce 2 Fibertype mismatch Not covered by TIA standard hatali ether Mid Oustomer Daw 20 PM200V1 0 11 04 1 9 Clearing Data After data has been downloaded to the PC with the Reporter software it is recommended to save the data to a file and clear the memory from the PM200 To clear data from the PM200 while the unit is OFF press and hold the SAVE DOWNLOAD button and press the ON OFF Backlight button The A icon will disappear from the display when the data has been successfully erased 21 PM200 V1 0 11 04 2 0 PC Based Meter Control When connected to the RS 232 port on a PC using a terminal program such as Hyperterminal many of the PM200 s functions can be activated from the PC keyboard The list of functions follows Key A Function Auto mode Description Pressing the A key is the equivalent to holding the AUTO button on the PM200 The wavelength display will begin toggling between the currently selected wavelength and AUO Auto mode scans incoming power for modulated optical signals and switches wavelengths automatically when a corresponding modulated signal is received Key C Function Clear memory Description Pressing the C key is the equivalent to holding the SAVE DOWNLOAD button on the PM200 while the unit is powered ON The data indicator icon will disappear from the display Key D Function Download memory Description Pressing the D key is the equivalent
14. ppears in the dropdown box Click Next to continue 14 PM200V1 0 11 04 1 8 3 Fiber Length Input 1 8 3 1 Enter the length of the fiber link under test This length will apply to all of the data points downloaded from the PM200 Type the length in the input box and select the length units at the right 1 8 3 2 Once the fiber link length and the length units are entered Click Next to continue 15 PM200V1 0 11 04 1 8 4 Connectors and Splices Input 1 8 4 1 If there are any connections or splices in the link enter them into the input boxes 1 8 4 2 Once the number of connections and splices have been entered Click Next to continue 16 PM200V1 0 11 04 1 8 5 Company Selection 1 8 5 1 Select the company name from the drop down list If it is not listed click the New Organization button 1 8 5 2 Type in the organization s name and telephone number into the input boxes 1 8 5 3 Once the organization s name and telephone number have been entered click OK to continue 1 8 5 4 The organization name should now appear in the dropdown box Click Next to continue 17 PM200V1 0 11 04 1 8 6 Name Input 1 8 6 1 Entera descriptive name for the link into the input box 1 8 6 2 Once the link name has been entered click Finish to continue 18 PM200V1 0 11 04 1 8 7 Summary View By default Reporter opens up into Detail
15. r From time to time an error code may appear These error codes and descriptions are located later in this manual Connect the units to the next fiber in the link and repeat step b Notice the number of data points will increment by 2 one data point per wavelength NOTE the PM200 can store up to 100 data points It is highly recommended to download the stored data periodically using the Reporter software 11 PM200V1 0 11 04 1 8 Downloading Data to a PC With Reporter Software Once testing is complete or the PM200 s memory is full the stored data points may be downloaded to a PC running the Reporter software A Pentium PC or better running Windows 95 or later operating system is required for Reporter Software Please use the included CD to install the software Insert the CD to begin the installation Follow the on screen steps to install Once Reporter is installed on the PC it is ready to download the data points from the PM200 Connect the PM200 to the PC COM port via the supplied download cable With Manuals RS 232 to RCA amp Reporter Software WaveTester Meter S Serial Download Cable Windows Pentium based PC First prepare the PM200 for download to PC Follow the steps below J Untitled OWLReporter Be Edi Domriosd Weeds Help Og Ss 444d eH LK alo Ready 1507 08 15 2003 Record 0 of 0 With the PM200 powered ON run Reporter The shortcut is located in the Start Menu under Programs Extech
16. velength The PM200 is now zeroed and is ready to test fiber links NOTE DO NOT REMOVE THE PATCH CORD FROM THE LIGHT SOURCE AS THIS WILL MAKE THE OPTICAL REFERENCE INVALID 9 PM200 V1 0 11 04 1 6 Optical Loss Measurement a Leaving the patch cord attached to the light source remove the patch cord from the PM200 optical power meter b Connect the PM200 and light source to opposite ends of the link under test c The PM200 will show the amount of loss in the link in dB Figure 4 shows a power level of 2 45 dB This means that the optical power being received by the meter is 2 45 dB below the optical reference which is the same as saying there is 2 45 dB of optical loss in the link LINK UNDER TEST eer PATCH PANELS Optical loss measurements are compared to a pre calculated link budget If the optical loss does not exceed the link budget calculation the link will perform as installed within the specifications shown on the link budget 2 45e 8 moa Figure 4 10 PM200 V1 0 11 04 1 7 Data Storage a b c Connect the PM200 and light source to opposite ends of the link under test Press the SAVE DOWNLOAD button The PM200 will store a data point for each wavelength and will briefly show the number of data points currently stored in place of the wavelength The presence of the data storage icon P shows that there is data stored in the mete
17. wer in dBm mode the PM200 will measure the absolute amount of power being received in the 2 5mm Universal detector port Absolute power is shown in dBm decibels referenced to a milliwatt meaning the power being received by the photodetector is compared to 1 milliwatt of optical energy Optical power measurement is useful for checking the output power and or stability of an optical transmission system or stabilized fiber optic light sources 1 3 2 Optical Loss Measurement When displaying power in dB mode the PM200 can be used to measure the optical power through a fiber optic link relative to an optical reference point Setting a reference point is also known as zeroing the meter with a light source Optical loss measurements are useful for measuring the attenuation or loss of a fiber link The loss value can then be compared to a pre calculated link budget which is used to determine if the fiber link will operate within the parameters of the transmission equipment The formula for calculating loss in a fiber link is L P Par where L is the amount of optical loss in dB P is the absolute power in dbm and P is the reference power in ar dBm Optical loss measurements can also be used for fiber optic link certification Link certification is a process where optical loss measurements are compared to a link budget calculated using fiber optic cabling standards Data stored in the PM200 can be downloaded into the Reporter certification r
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