IC693MLX000

如果平均碰撞率大于10％或是观察到非常高的碰撞，就需要进一步的测试了。如果可能，试着通过减少网段规模（将网络分成小段）并随时监测碰撞的变化以隔离出发生问题的区域。为了跟踪碰撞情况，就知道网络的流量。可以使用背景流量发生器来加入适量的流量（100帧／秒、100字节长的流量），并同时观察网络的统计显示。某些和介质有关的故障是与流量的大小成正比的。可以用控制键改变流量同时观察碰撞与错误的改变。这种做法要特别小心，因为你很容易给网络加入很重的流量。解决与碰撞有关的问题常常是很费劲的，因为测试的情况在很大程度上取决于观察的位置。也许在同一网段相距几尺远的不同观察点所看到的情况就不同，要多找几个点来测试并留意所发生的变化。

　　    如果碰撞与流量成正比，或碰撞几乎是100％，或几乎没有正常的流量，则可能是布线系统出了问题。对于UTP的布线，可以在Hub上断开电缆然后进行电缆测试。对于同轴缆就要进行阻抗测量，可以使用数字表或其他仪表的直流通断功能进行测试。如果电缆两端都有端接器，从T型接头应测得大约25 ，如果从电缆的一端将会测得50 。

CHESTERTON 689623 442 GEMINI SPLIT SPARE KIT PUMP SEAL 36 4.500 IN B331970

89799-1 1H11915C-2 10-1/2IN OD 51 TOOTH STEEL SPUR GEAR D462152

HONEYWELL MP918B 1006 2 VALVE ACTUATOR SPRING RANGE 3-13PSI B211638

NORGREN QM/46140A/88 PNEUMATIC REPAIR KIT REPLACEMENT PART B263029

HYSTER 1311358 SEAL KIT HYDRAULIC CYLINDER REPLACEMENT PART D299915

PEARSON A098459 ROLLER LID-LIFT 2IN OD 1.940IN WIDTH CONVEYOR PART D307096

REEVES 349254 15/16IN BORE VARIABLE SPEED PULLEY DISC KIT D397834

RINGFEDER RFN 7012-IN KEYLESS SHAFT HUB LOCKING ASSEMBLY D488649

ASCO 158-870 REPAIR REBUILD KIT SOLENOID VALVE D488942

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TAYLOR SK10062A-6 LOW PRESSURE UNIT TRANSMITTER REPLACEMENT PART D454284

CHESTERTON 010391 4.500 X 5.000 X 0.250 PUMP PACKING RING GRAPHITE D476822

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ABB TE-7K-MD PUMP BUSHING ASSEMBLY CERAMIC D474236

MASONEILAN DRESSER 808898-171-061 REGULATOR SEAL KIT STEAM VALV

CUTLER HAMMER 7S0572 JIC MALE CRIMP 45 DEGREE TUBE HOSE 7/8 IN FITTING B495157

HAYSSEN 10217A3166 GLAND SEAL KIT PNEUMATIC CYLINDER D495341

AEROQUIP 1A16 JIC ELBOW SWIVEL CRIMP 1 X 3/4 ID HOSE HYDRAULIC FITTING B447327

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GOULDS 100-770-1001 3196 IRON PUMP FOOT ASSEMBLY D493686

CHERRY BURRELL 5902765 RING CARBON PUMP SEAL D446359

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BIACH A976014 BEARING STUD TENSIONER BRONZE D481887

REXROTH DS A4VG28 ROLLSTAR HYDRAULIC DRIVE SEAL KIT REPLACEMENT PART B399119

FMC 19988 ANTI FRICTION RING EXTRUDER SYNTRON REPLACEMENT PART D422606

MORSE 35 M/M MASTER COBALT 35MM 1-3/8 IN DIAMETER BI-METAL HSS HOLE SAW B493993

LMI MILTON ROY 25319 LIQUIFRAM 3.0SL PUMP METERING KIT REPLACEMENT B477225

BADGER METER RESEARCH CONTROL 1IN NPT STAINLESS CONTROL VALVE PART B416596

FLEETWOOD 4033-394-00-B DRIVE DISK CAP 21IN OD CONVEYOR REPLACEMENT B300841

WM BERG P16S38-32 1/2 ID 32 TOOTH SLITTER VEE RAIL GEAR REPLACEMENT PART B456623

91609053 VALVE MOUNTING BRACKET STAINLESS REPLACEMENT PART D229120

SPIRALTRAC FI3500RS4750(ES?C) GRAPHITE PUMP SEAL THROAT BUSHING D517663

GGB MB2420DX BEARING SLEEVE BUSHING 27MM OD 24MM ID 14MM THICK D441730

VICKERS 941853 SUB ASSEMBLY HYDRAULIC VALVE REPLACEMENT PART D490267

CONOVER 23-CK412 INTERRUPTER DOOR SEAL BREAKER KIT D422281

O53Z0091JCP COIL 120V AC SOLENOID VALVE REPLACEMENT PART D280800

PULSAFEEDER W205346000 PUMP HEAD ASSEMBLY D481229

PMV P-1500 PNEUMATIC DOUBLE ACTING VALVE POSITIONER D498331

TRI CLOVER 17-62-3.5-U VALVE BODY GASKET BUNA REPLACEMENT PART D451298

SULLAIR 250024 783 VAC REGULATOR RSVS KIT D424718

CHESTERTON 180WB SIZE 11 1.375IN RELIABILITY CARTRIDGE SINGLE PUMP SEAL B408414

FISHER 4R669446102 12 IN VEE VALVE BALL STAINLESS D478909