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AALogic SNOOPY SR-101 Manual
Also see for SR-101: Technical manualTechnician manual
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Cable Fault Location System Aerial Fault Location QR V 1.2 1Cable Fault Location System - Aerial Fault Location Quick ReferenceThis quick reference provides abbreviated guidelines on the use of the Cable Fault Location System (Snoopy) for locatingAerial resistive cable faults.SAFETYAll prescribed safety precautions and procedures must b e observed while using the SR-101 equipment.Failure to do so can result in serious injury or death.TYPES OF FAULTSThe following resistive faults may be located:• Short Tip connected to Ring• Cross Tip or Ring of one pair is connected to the Tip or Ring of another pair• Split Tip or Ring of one pair is split with the Tip or Ring of another pair✓ The cable length beyond the fault should be as short as possible.FAULT PRE-TESTINGThe technician must identify the type of fault, estimate the distance, and section the pair(s) using local practiceprocedures. The far end of the section should be less than 35% of the section length if possible.PAIR SPLITSThe diagram below shows a split and how to place temporary short at the far end of the section and connect thetransmitter clips.Locating a SplitTIPRINGRT TIPRINGRTTIPRINGRT TIPRINGRTPair 1Pair 2TIPRINGRTTIPRINGRTPair 1Pair 2TemporaryShortLocating a SplitTIPRINGRTTIPRINGRTPair 1Pair 2TemporaryShortLocating a SplitTIPRINGRT TIPRINGRTTIPRINGRT TIPRINGRTPair 1Pair 2TIPRINGRTTIPRINGRTPair 1Pair 2TemporaryShortLocating a SplitTIPRINGRTTIPRINGRTPair 1Pair 2TemporaryShortFAULT LOCATIONTransmitter Setup 1. The ST-101 should be positioned at one end of the cable section. The length past the fault,the far-end opposite the transmitter, should be minimized, to reduce carry-by of the tone.2. Connect the transmitter clips to the fault as follows:Fault ConnectionsShort Tip and Ring of the shorted pair.Cross The two wires that are crossedSplit The split wires. See paragraph 4.3. The transmitter “Auto-Set” function serves as a general guideline for frequency and[LEVEL] settings.4. Turn on the transmitter and use Auto-Set for the transmitter initial frequency and powersettings or use 335Hz. The PWR OUT indication should be near mid-scale.5. The following guidelines help manually adjust the frequency based on the cable sectionlength if needed:Freq (Hz) 500 1000 5000 10000 20000 40000145 95,900 48,000 19,200 9,600 4,800 2,400335 41,500 20,800 8,300 4,200 2,100 1,000577 24,100 12,100 4,800 2,400 1,200 600987 14,100 7,000 2,800 1,400 700 4002000 7,000 3,500 1,400 700 300 200Section Length (Feet)Resistance Limits In Ohms (Ω) |
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