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Instruction Manual for TEMPO COMMUNICATIONS models including: OFL100 OTDR, Optical Time-Domain Reflectometer, OFL100 OTDR Optical Time-Domain Reflectometer
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DocumentDocumentINSTRUCTION MANUAL SET ON CHARGE ESC OFL100 OTDR 55501342 REV 0 Read and understand all of the instructions and safety information in this manual before operating or servicing this tool. Register this product at www.TempoCom.com © 2022 Tempo Communications Inc. 01/2022 OFL100 Table of Contents Preface 3 Description ............................................................................................................................................................ 3 Safety....................................................................................................................................................................... 3 Purpose of This Manual ................................................................................................................................. 3 Warranty................................................................................................................................................................. 3 Important Safety Information 4 Section 1. Introduction 7 Section 2. Basic OTDR Information 8 Principle of OTDRs ............................................................................................................................................ 8 Basic Definition and Classification of Events....................................................................................... 8 Section 3. OFL100 Operation 8 Host .......................................................................................................................................................................... 8 Function Keys ...................................................................................................................................................... 9 Main Interface ...................................................................................................................................................... 9 Auto OTDR ..........................................................................................................................................................10 Expert OTDR ......................................................................................................................................................10 Parameter Settings ..........................................................................................................................................11 OFL100 Pulsewidth Selection .....................................................................................................................11 Threshold/Criterion ........................................................................................................................................ 12 Threshold Settings................................................................................................................................ 12 Eligibility Criteria ..................................................................................................................................... 12 OFL Trace ............................................................................................................................................................. 12 OTDR File Saving.............................................................................................................................................. 13 File Operation..................................................................................................................................................... 13 Event Map............................................................................................................................................................14 OPM ........................................................................................................................................................................14 VFL ..........................................................................................................................................................................14 Laser Source....................................................................................................................................................... 15 Optical Loss Test.............................................................................................................................................. 15 System Settings ............................................................................................................................................... 15 Section 4. OFL100 Troubleshooting 16 Section 5. Trace Viewer 17 Tempo Communications Inc. 2 1390 Aspen Way · Vista, CA 92081 USA · 800-642-2155 OFL100 Preface Description The Tempo Communications OFL100 is an Optical Time Domain Reflectometer (OTDR) that is used to measure the length and individual loss events on a singlemode fiber optic link. Safety Safety is essential in the use and maintenance of Tempo Communications tools and equipment. This instruction manual and any markings on the tool provide information for avoiding hazards and unsafe practices related to the use of this tool. Observe all of the safety information provided. Purpose of This Manual This instruction manual is intended to familiarize all personnel with the safe operation and maintenance procedures for the Tempo Communications OFL100 handheld OTDR. This instruction manual is free to download from www.tempocom.com Warranty Tempo Communications Inc. warrants to the original purchaser of these goods for use that these products will be free from defects in workmanship and material for two years. This warranty is subject to the same terms and conditions contained in Tempo Communication's standard one-year limited warranty. For all Test Instrument repairs, contact Customer Service at 800-642-2155 to request a Return Authorization. For items not covered under warranty (such as items dropped, abused, etc.), a repair cost quote is available upon request. Note: Prior to returning any test instrument, please check the battery is at full charge. Tempo Communications Inc. 3 1390 Aspen Way · Vista, CA 92081 USA · 800-642-2155 OFL100 Important Safety Information SAFETY ALERT SYMBOL This symbol is used to call your attention to hazards or unsafe practices which could result in an injury or property damage. The signal word, defined below, indicates the severity of the hazard. The message after the signal word provides information for preventing or avoiding the hazard. Immediate hazards which, if not avoided, WILL result in severe injury or death. Hazards which, if not avoided, COULD result in severe injury or death. Hazards or unsafe practices which, if not avoided, MAY result in injury or property damage. Read and understand all of the instructions and safety information in this manual before operating or servicing this tool. Failure to observe this warning could result in severe injury or death. Electric shock hazard: · Do not operate in an explosive atmosphere such as in the presence of flammable gases or fumes. · Before applying power, verify that the unit is set to match the available line voltage. Failure to observe these warnings could result in severe injury or death. Tempo Communications Inc. 4 1390 Aspen Way · Vista, CA 92081 USA · 800-642-2155 OFL100 Important Safety Information (cont'd) Connecting the OFL100 to a live fiber may cause permanent damage. Do not connect to live fibers. Electric shock hazard: · Fuse replacement should be performed by Tempo qualified personnel. · Do not use repaired fuses or short-circuited fuse holders. Failure to observe these warnings could result in severe injury or death. LASER LIGHT DO NOT STARE INTO BEAM CLASS 1 LASER PRODUCT The OFL100 use laser devices conforming to the requirements of CDRH, CFR 1040, Subchapter J. While there is no potential for eye damage due to unaided direct exposure, users should always avoid looking directly into the output port. The use of optical viewing instruments, such as microscopes, magnifiers, etc., should always be avoided. The use of such devices around active fibers can focus an intense beam of light energy onto the retina of the eye, which can result in permanent damage. Laser hazard: · When performing measurements on fiber optic systems, avoid eye exposure to any open-ended fibers, optical connectors, optical interfaces, or other sources because they may be connected to active laser transmitters. · Do not look into the optical port when a source is turned on. · Avoid looking at the free end of a test fiber, i.e., the end not connected to the instrument. If possible, direct the free end toward a non-reflective surface. Failure to observe these precautions may result in injury. Tempo Communications Inc. 5 1390 Aspen Way · Vista, CA 92081 USA · 800-642-2155 OFL100 Important Safety Information (cont'd) Electric shock hazard: · Do not expose batteries to fire or intense heat. Do not open or mutilate batteries. Avoid touching the electrolyte in the batteries, which is corrosive and may cause damage to eyes or skin. · Do not open the case of the unit for any reason. It contains no user-serviceable parts. · Use this unit for the manufacturer's intended purpose only, as described in this manual. Any other use can impair the protection provided by the unit. Failure to observe these precautions may result in injury and may damage the unit. Instrument damage hazard: · Make sure that the optical fiber or cable is not in use and there is no laser beam in the fiber before testing with this unit. · Do not leave the unit in direct sunlight or near direct sources of heat. · Protect the unit from strong impacts or shock. · Do not immerse the unit in water or store in areas with high humidity. · When necessary, clean the case, front panel, and rubber cover with a damp cloth. Do not use abrasives, harsh chemicals, or solvents. · Replace the protective dust cap when the unit is not in use. · Store the unit and interface adapters in a cool, dry, and clean place. Failure to observe these precautions may result in injury and may damage the unit. Electric shock hazard: · Do not expose the unit to extremes in temperature or high humidity. Refer to "Specifications." · Turn the unit off, disconnect from power, and make sure the laser source is off before cleaning. Failure to observe these precautions may result in injury and may damage the unit. The OFL100 uses a polymer lithium battery and is to be charged with the supplied charger at 5V/2A at a temperature range of 0° to 50°. The OFL100 will not charge. Do not use any other charger to charge the OFL100. Tempo Communications Inc. 6 1390 Aspen Way · Vista, CA 92081 USA · 800-642-2155 OFL100 Section 1. Introduction Tempo's OFL100 handheld OTDR can measure a single optical fiber or an entire fiber optic link. The OFL100 can check the transmission quality of optical fiber through the measurement of backscatter. Standard organizations like the International Telecom Union (ITU) define backscatter as an effective analysis means to measure optical fiber loss. Backscattering is also the only effective way of connector inspection, which can be applied to measure the length of optical fiber. The OFL100 OTDR operates by reviewing events in optical fiber (for example, irregularities and connectors). These tools can help identify irregularities in optical fiber, locate them, and measure their attenuation, relevant loss, and homogeneity. The OFL100 is easy to use, small, and compact with large touchscreen LCD display with graphical interfaces. They can save and transfer the measurement curves data to a PC by using the provided Trace Viewer software for further analyzing, reporting, and printing. Basic applications: · Measure the length of optical fiber and cable. · Measure the distance between two points on optical fiber and cable. · Measure loss between two points on optical fiber and cable. · Measure fusion splice losses. · Measure Macrobends. · Measure reflection of reflective events of fiber optic links. · Locate faults of optical fiberoptic cables. · Display distribution curve of optical fiber and cable loss. Tempo Communications Inc. 7 1390 Aspen Way · Vista, CA 92081 USA · 800-642-2155 OFL100 Section 2. Basic OTDR Information Principle of OTDRs An OTDR (Optical Time Domain Reflectometer) is a measurement instrument for identifying optical fiber transmission features. The OTDR is used to measure the overall attenuation of a fiber optic link and to provide details relating to the position of each event in that link. Events include splices, connectors, bends, and optical components. Its non-destructive, single-ended connection and rapid measurement have made the OTDR an indispensable tool for manufacturing, construction, and maintenance of optical fiber links. The faults and heterogeneity of optical fiber itself cause Rayleigh scattering of light transmitted in optical fiber. Part of the light pulse is scattered in the reverse direction, and this is called Rayleigh backscattering, which actually provides attenuation details relating to fiber length. Information relating to distance is obtained through time information (thus "time domain" in the name OTDR). Fresnel reflection occurs at the boundary between two media of different IOR (for example, connections of faults, connectors, or optical fiber end). This reflection is used to locate the discontinuous points on optical fiber. The magnitude of reflection depends on the difference between IOR and the smoothness of boundary. An OTDR sends out a light pulse into the optical fiber and receives reflections of events and backscattering power of the pulse in time. Locations will be displayed on the LCD. The y-axis is the dB value of backscattering power, and the x-axis is the distance. Basic Definition and Classification of Events Events refer to any abnormal points causing attenuation or sudden change of scattering power besides the normal scattering of optical fiber, which include losses such as bending, connections, and ruptures. Event points displayed on the LCD are abnormal points that cause traces to deviate from a straight line. Events can be classified as reflection events or non-reflection events. Section 3. OFL100 Operation Host Top 1 OTDR/LS port 2 OPM port 3 VFL port 4 Flashlight 5 Type C USB 6 SD Card Main View 1 Dust cover 2 4.3 inch color LCD 3 Function keys 4 Charging indicator 5 Power on status indicator Tempo Communications Inc. 8 1390 Aspen Way · Vista, CA 92081 USA · 800-642-2155 Function Keys OFL100 Zoom control / AB cursor switch key Toggles between cursor movement and zooming in on the currently displcayed trace. SET ON CHARGE ESC Test / Stop key Press to start or stop test. Direction key Press to move selection up, down, left or right. ESC key Exit current function. SET key Press to access basic OFL100 test settings. Power ON/OFF key: Press less than two seconds to turn on the OFL100 on. Press for longer than two seconds to obtain the pop-up message to turn the OFL100 off. While the OFL100 is on, a short press will toggle the flashlight on and off. Main Interface Use the cursor keys to navigate to the desired function and press OK key to select that function or directly select on the screen. Date & Time Flashlight USB Battery SD Card Shortcut menu Press the "Shortcut menu" icon to enter the quick operation menu, and press select the desired function. Press the Print Screen camera icon to make a screen shot. The screen shot is automatically saved with a file name being the current time. Tempo Communications Inc. 9 1390 Aspen Way · Vista, CA 92081 USA · 800-642-2155 Auto OTDR All parameters are automatically determined and the OFL100 will measure the length and attenuation of a fiber optic link. OFL100 Expert OTDR The user can set each test parameter to optimize for the most accurate test result. The trace and event list are displayed at the same time. Link results are summarized in a list. Switch to event icon display mode. Save the current trace file quickly. Enter parameter setting interface. AutoTest Perform an automatic test with OFL100 determined settings. Real Test Perform an updated real time test at a rate of approximately 2Hz for real time identification of events. Averaging Test Perform a test with user determined settings with a static display upon completing the measurement. Tempo Communications Inc. 10 1390 Aspen Way · Vista, CA 92081 USA · 800-642-2155 OFL100 Parameter Settings Wavelength: The wavelength can be set to 1310nm or 1550nm. Range: The range can be set to capture the entire fiber link length. Pulse width: Refers to the time width of the optical pulse signal emitted during test. The larger the pulse width, the stronger the optical power injected into the optical fiber, the stronger the backscattering signal of the optical fiber is, and the farther the effective detection distance of the OTDR can be. However, the large pulse width will cause saturation of the initial reflection signal and a longer deadzone. The choice of pulse width is related to the length of the optical fiber. The longer the length, the larger the pulse width, which can only be modified in real-time/average measurement mode. IOR: The Index of Refraction is provided by optical cable fiber manufacturer and can be found on the individual spool of fiber. The technician can enter the IOR for the most accurate measurements. Test time: Used in the average test mode to set the total averaging time. A longer averaging time will result in the best signal to noise ratio. Unit: Used to select the desired units to km/kfeet or miles. OFL100 Pulsewidth Selection Tempo Communications Inc. 11 1390 Aspen Way · Vista, CA 92081 USA · 800-642-2155 Threshold/Criterion Threshold Settings Event loss threshold: Set the loss threshold for connectors and fusion splices between 0.2 and 30dB. The default is 0.2dB. Events larger than the threshold will be listed in the event table. Refelction threshold: Set the return loss threshold for reflective events ranging between 10dB and 60dB. The default is 40dB. Reflective events more intense than 40dB will be recorded in the event table. End threshold: The end of the fiber link will be determined by the end threshold setting. The range can be adjusted from 1 to 30dB with the default set to 10dB. The first loss event >10dB will indicate the end of the fiber. Eligibility Criteria Setting the threshold determines the pass or fail criteria for each event. Fresnel events: Reflective events typical of connectors. Raleigh events: Non reflective events typical of fusion splices. MacroBend: A non-reflective event that shows low loss at 1310nm and significant loss at 1550nm. Average Loss: The loss value per kilometer of the link under test. OFL100 OFL100 Trace Select correct parameter, the test results such as trace and event list will be displayed after test completed. Curve Zoom: Press the [zoom] menu to enter the zoom in and zoom out mode. / Zoom in or out in X direction / Zoom in or out in Y direction Event List List: The tested results are displayed in the form of a list. Total length: The total length of the link under test. Total loss: The total loss of the link under test. Slope: The loss per kilometer of the link under test. Total events: The total number of events, the number of passed events and the number of failed events of the link under test. In the event list: NO.: The order of the current event. Type: The type of the current event. Distance: The location of the current event. Segment: the distance between the previous event and the current event. Loss: the loss of the current event. Total loss: the loss from the starting point to the current event. Slope: the loss per kilometer from the starting point to the current event. Reflection: the return loss of the current event. Tempo Communications Inc. 12 1390 Aspen Way · Vista, CA 92081 USA · 800-642-2155 OFL100 OTDR File Saving After the measurement, press [save] to save the file, enter the file name, and press [enter] to save the file. You can also press [Fastsave] to save the file. The file is saved in a folder named the same day's date. Auto save: open the auto save function, the file name will be automatically generated according to the rules; File naming method (only valid for "auto save" and "one click save"): 1+4 : file name + fiber number naming, fiber number 1+2+4 : file name + wavelength + fiber number naming, fiber number increasing in order; 1 + 2 + 3 + 4 : file name + wavelength + pulse width + fiber number, and the fiber number increases in order. File name: enter the file name manually; Optical Fiber Code ID: The optical fiber number and code set when the line is installed: Location A: Link start point location Location B: Link termination point location Direction: Optical fiber test direction, from A to B, from B to A; Operator: Enter the name of the technician. File Operation File Operation All the test curves are saved in the standard SD card of the instrument. Press [File] to enter the file operation interface. You can open, delete and rename files. Tempo Communications Inc. 13 1390 Aspen Way · Vista, CA 92081 USA · 800-642-2155 OFL100 Event Map Start of fiber Raleigh loss event such as a fusion Rising event, caused by the inconsistency of refractive index of two sections of fiber Connector Macrobend Splitter End of link OPM The OPM can be used to measure absolute and relative power. The OPM can identify and measure tone wavelengths of 270Hz/330Hz/1kHz and 2kHz emitted from a compatible laser. Wavelength: Set the desired wavelength. Reference: Set the current power as the reference. The Relative power will be set to 0dB where loss measurements can be made. Calibration: Enter the calibration mode. Threshold: Set the threshold value of power measurement. If it exceeds the threshold value, it will be displayed in red; if it is lower than the threshold value, it will be displayed in green. VFL The visual fault locator is used to inject red laser light into the fiber under test to allow the technician to visually locate breaks or Macrobends in fiber optic cables. The VFL can also locate contaminated and damaged connectors. Open: Turns the visual fault locator on in continuous wave mode. 1Hz: Visual fault locator flashes at a rate of 1Hz. 2Hz: Visual fault locator flashes at a rate of 2Hz. Close: Turn off visual fault locator. Tempo Communications Inc. 14 WARNING Avoid looking directly at the laser output port; permanent eye damage may occur 1390 Aspen Way · Vista, CA 92081 USA · 800-642-2155 OFL100 Laser Source The OFL100 provides a CW stabilized light source that is 1310nm or 1550nm. These can be used with a compatible OPM to measure insertion loss of fiber optic links. A tone can be inserted at 270Hz/330Hz, 1kHz and 2kHz to aid in fiber identification. Open: Turns the laser source on. Wavelength: Allows the technician to set the wavelength of laser source. Mode: Set the laser frequencey between CW, 270Hz, 330Hz, 1kHz and 2kHz. Power + : Increase the output power. Power - : Reduce the output power. The slider bar at the bottom of the screen can be used to adjust the output power. WARNING Avoid looking directly at the laser output port; permanent eye damage may occur Optical Loss Test The optical loss test allows the technician to measure the insertion loss of passive optical components. To measure insertion loss: 1) Set the OPM and SLS to the desired wavelength. 2) Connect the SLS (OTDR) port to the OPM port. 3) Press Reference. The Rel Pow should be 0dB. 4) Insert device to be measured. 5) Read the loss of the device under test under Rel Pow. System Settings Automatic shutdown: The technician can select the desired time to automatically turn the OFL100 off after a period of inactivity equal to 5/15/30/45/60 minutes or to never shut down. Backlight brightness: The technician can adjust the brightness to 20%/40%/60%/80% or 100%. Beeper: The technician can enable or disable the beeper for touch confirmation. Language: Allows the technician to select the desired language. USB connection: Allows the technician to connect and transfer data via the USB port. Time & date: Allows the technician to set the time and date. Restore factory settings: Allows the technician to restore the OFL100 back to factory default. Upgrade: Provides the technician the utility to update the firmware application. Tempo Communications Inc. 15 1390 Aspen Way · Vista, CA 92081 USA · 800-642-2155 OFL100 Section 4. OFL100 Troubleshooting Fault Description OTDR will not turn on. OTDR cannot be charged normally. Cause of Failure The battery is dead. Ambient temperature not within acceptable levels. Check that the charger is working. Solution Charge the battery and observe the charging indicator. If the red light is displayed, continue charging. Replace charger. Try charging the OFL100 with the USB port. Set range to greater than the length of the fiber. OTDR does not measure and display test results. The noise of test curve is excessive, and the waveform is not smooth. Events are saturated. OTDR parameters are not set correctly. OTDR bulkhead is contaminated. OTDR bulkhead is damaged. Optical output connector mismatch. The field fiber is not connected properly to the bulkhead. The pulse width setting is too small. Averaging time is set too low. The pulse width is too long. Set range to greater than the length of the fiber. Clean OTDR bulkhead and field fiber ferrule. Send to Vista for bulkhead repair. Use correct fiber size and connector to match bulkhead. Clean and reconnect the field fiber to the bulkhead. Increase the test pulse width. Increase the averaging time. Decrease test pulse width. After a reflective event there is a long tail. The last connector is open and likely a flat polished connector. OTDR bulkhead is contaminated. OTDR bulkhead is damaged. Terminate the last connector or place a Mandrel wrap on the fiber before the last connector. Clean OTDR bulkhead and field fiber ferrule. Send to Vista for bulkhead repair. The reflection peak at the end of the fiber cannot be measured. OTDR parameters are not set correctly. The pulse width is too short. Set range to greater than the length of the fiber. Increase the test pulse width. False positive in curve analysis. Event threshold setting is too low. Increase the threshold analysis setting. The fiber length measured appears to be not correct. OTDR parameters are not set correctly. The index of refraction of the fiber is not correct. Set the range to capture all of the fiber. Ser pulse width so that the events are not saturated. Enter the index of refraction from the data sheet. Tempo Communications Inc. 16 1390 Aspen Way · Vista, CA 92081 USA · 800-642-2155 OFL100 Section 5. Trace Viewer Trace Viewer software is an application developed for the OFL100 OTDR. It allows the previously stored SOR measurement records in the instrument to be uploaded to a PC via the USB port. The measurements can then be displayed, saved, or printed as a PDF for close out reporting. The Trace Viewer Documents: - Fiber trace - Test conditions/settings - Fiber information - File name/date All events are listed with test results documented in tabular form. Features of a trace can be zoomed in on and cursors manipulated for closer examination. The Tempo Communications Trace Viewer is available for download at www.tempocom.com. Tempo Communications Inc. 17 1390 Aspen Way · Vista, CA 92081 USA · 800-642-2155 Tempo Communications 1390 Aspen Way · Vista, CA 92081 · USA 800-642-2155 · An ISO 9001 Company Tempo Europe Ltd. · Brecon House · William Brown Close Cwmbran · NP44 3AB, UK · Tel: +44 1633 927 050 www.TempoCom.com