FIBRE OPTIC TEST EQUIPMENT ® MEGGER OTP510 & OTP520 • Measure light emitted from an optical fibre • Hand-held, robust, lightweight and simple to use • Optimised for 850 nm wavelength of light • Dust cap to protect detector and adaptors fixed to case Fibre Optic Power Meters DESCRIPTION ® The MEGGER OTP510 and OTP520 The liquid crystal display is installation stage or when Fibre Optic Power Meters are small, calibrated to give readings directly in undertaking maintenance work on compact, hand-held instruments for dBm but a conversion graph on the optical systems found in a variety of measuring the light emerging from an rear label of the instrument enables situations. These may be optical fibre, particularly when an the user to obtain the equivalenttelecommunication systems, optical system is being tested. power loss in μW, if necessary. The including local area networks, display gives an out-of-range computer installations, industrial They are tough, robust instruments indication and also shows when the process controls or high voltage powered by internal replaceable battery needs replacing. Nonslip monitoring circuits. In fact, anywhere batteries, and their response is rubber feet are fitted to the case to signals are transmitted by optical optimized for a wavelength of light of grip the work surface and a fold-away fibres rather than ordinary cables. 850 nm. However, by use of a support stand/suspension hook is Such cables are used where wide conversion graph, results may be provided to assist the user in settling bandwidth transmission has to take obtained when the wavelength is in an instrument in the most place, in security systems where the range of 400 to 1000 nm. The convenient position, if it is not held there needs to be immunity from OTP510 has just one range, in the hand. airborne electrical noise and in measuring the absolute optical hazardous environments. power level directly in terms of dBm, A range of adaptors are available for i.e. optical power relative to 1 mW. fitting to the detector housing to These Power Meters are suitable for The OTP520 has two ranges, one make an instrument compatible with use on both monomode and measuring absolute optical power various common optical fibre multimode optical fibres. In addition level in dBm and the other, the dBr connector types, thereby enabling to their use for assessing optical range, giving a reading of dB relative the unit to be connected directly to a fibre connector quality and the to a previous dBm measurement. A variety of cables. A range of straight degree of attenuation within a fibre dBm measurement is made first and, connectors for joining cables link, they may be used for flux on moving the switch to the dBr together is also available so that the budgeting - determining the amount position this dBm value is stored in task of making accurate and reliable of loss a link will sustain before the memory: subsequent readings taken measurements on an optical fibre receiver system ceases to operate. on the dBr range are relative to the system can be eased. Another application is in a go/no go original dBm value. In this way, the type of test when undertaking fibre amount of loss a connector or length APPLICATIONS identification in a multifibre cable. of fibre may have is obtained without Generally the OTP510 and OTP520 a calculation. are used in conjunction with a light ® source such as the MEGGER OLS510 The detector housing is fitted to the (or operate with the system’s own top of the casing and holds the large- optical source), to determine the area silicon photo-detector diode. attenuation throughout an optical The housing is of robust fibre network. Connector, coupling construction to prevent damage to splice loss, or loss due to damage, the diode while in use or in transit. A can be identified with this equipment protective dust cap, attached to the in fibres made of silica, plastic- case, covers the detector diode, and coated silica or all plastic. any optical fibre connector adaptor fitted to it, when the instrument is These instruments are ideal for not in use. testing fibre networks at the FIBRE OPTIC TEST EQUIPMENT SPECIFICATION OPT51O Storage Error: Range dBr Range: 0,00 ±0,1 in the range +3 to -40 dBm: stability 0,02 dB/h +3 to -60 dBM OTP510 and OTP520 Resolution: 0,1 dBm Overload Ratings: Accuracy (at 23°C ±2°C): ±0,5 dBm at -10 dBm point, 850 2 nm wave-length, using a 200 μm diameter fibre Max. input power density level 2,5 W/cm, sensible measurements only up to 2 mW Linearity: Better than 0,4 dBm at 23°C Temperature Range: Temperature Coefficient Operating: -5 to +40°C Down to -50 dBm: ±(0,05% of reading /°C +0,1 dBm -50 to -60 dBm: ±(0,1% of reading/°C +0,1) dBm Storage: -20 to +70°C Humidity Range OTP520 Operating: 80% RH at 40°C max. dBm: +3 to -60 dBM Storage: 90% RH at 40°C max. dBr: Relative dB measurement where reference may be made in the range +3 to -40 dBm Power Supply: Single 9 V battery IEC 6-F22 type Resolution: 0,1 dBm (or dBr) Dimensions: Accuracy (at 23°C ±2°C): 215 H x 90 W x 40 D mm dBm Range: ±0,5 dBm at -10 dBm point, 850 nm (8,5 H x 3,5 W x 1,6 D in. approx.) wavelength, using a 200 μm diameter fibre Weight dBr Range: ±0,5 dBr at -10 dBr with reference of -10 dBm; 350 g (0,75 lb approx.) 850 nm wavelength, using a 200 μm diameter fibre Linearity: Better than 0,4 dBm at 23°C Temperature Coefficient: dBm Range: Down to -50 dBm: ±(0,05% of reading/°C +0,1) dBm -50 dBm to -60 dBm: ±(0,1% of reading/°C +0,1) dBm dBr Range: Down to -50 dBm ±(0,05% of reading+ reference/°C +0,1) dBm -50 dBm to -60 dBm: ±(0,1% of reading+reference/°C +0,1) dBm ORDERING INFORMATION Item (Qty) Order Code Bare fibre adaptor accommodating fibres in the 50 and 200 μm core diameter range . . . . . . . . . . . . . . . .6210-133 Fibre Optic Power Meter . . . . . . . . . . . . . . . . . . . .OTP510 Fibre Optic Power Meter . . . . . . . . . . . . . . . . . . . .OTP520 STC ferrule adaptor . . . . . . . . . . . . . . . . . . . . . . .6250-085 Included Accessories Biconical adaptor . . . . . . . . . . . . . . . . . . . . . . . . .6220-366 Cleaning kit for the meter detector housing, adaptors ST (I and II) adaptor . . . . . . . . . . . . . . . . . . . . . . .6220-448 and fibre connectors, consisting of a blower brush, Straight connectors for joining fibres together or cotton buds, lens tissues, liquid lens cleaner patchcords to fibres: Operating instruction book FC (NTT compatible) . . . . . . . . . . . . . . . . . . . . .25930-001 SMA (9 mm) . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25930-002 SMA (7 mm) . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25930-027 Optional Accessories AMP Optimate (LFR/SFR) . . . . . . . . . . . . . . . . .25930-003 Carrying case, simulated leather . . . . . . . . . . . .6420-024 AMP Optimate (DNP) . . . . . . . . . . . . . . . . . . . . .25930-004 Adaptors for attaching the following fibre connectors: SMA (9 mm) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6250-079 SMA (7 mm) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6250-084 AMP Optimate (DNP) . . . . . . . . . . . . . . . . . . . . . .6250-082 AMP Optimate (LFR/SFT) . . . . . . . . . . . . . . . . . .6250-078 Stratos 430 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6250-077 FC (NTT compatible) . . . . . . . . . . . . . . . . . . . . . .6250-076