Biddle TDR500_UG 电路图.pdf

Twisted Pair Co-ax TDR500 User Guide TIME DOMAIN REFLECTOMETER Main TypeSub TypeVelocity Factor Polyethylene Jelly Filled Polyethylene PTFE (Tefl on) Paper (Pulp 0.083uf/mile) Paper (Pulp 0.072uf/mile) Foam Polyethylene Air Spaced Co-axial Air Solid Polyethylene Megger Limited Archcliffe Road, Dover Kent CT17 9EN England T +44 (0)1 304 502101 F +44 (0)1 304 207342 E TYPICAL CABLE VELOCITY FACTORS 0.67 0.64 0.71 0.72 0.88 0.82 0.94 0.98 0.67 TELECOMMUNICATIONS CABLES Plc Gel fi lled 19 AWG 0.72 22 AWG 0.67 24 AWG 0.66 26 AWG 0.65 19 AWG 0.68 22 AWG 0.62 24 AWG 0.60 26 AWG 0.58 Pulp Service Wire 22 AWG 0.67/0.71 24 AWG 0.68 26 AWG 0.66 0.64 SAFETY WARNINGS GThis instrument is not to be used on energised cable. GThe instrument should not be used if any part of it is damaged. GDisconnect the test leads before accessing the battery compartment. GRefer to operating instructions for further explanation and precautions. GSafety Warnings and Precautions must be read and understood before the instrument is used. They must be observed during use. NOTE: THE INSTRUMENT MUST ONLY BE USED BY SUITABLY TRAINED AND COMPETENT PERSONS OPEN CONDUCTOR SHORTED CONDUCTOR SPLICE BRIDGE TAP SPLIT/ RESPLIT WET SPLICE/ WATER FRAYED CABLE WATER INGRESS TAP SPLITTER Mechanical The instrument is designed for use indoors or outdoors and is rated to IP54. Case Dimensions230mm long(9 inches) 115mm wide(4.5 inches) 48mm deep(2 inches) Instrument Weight0.6kg (1.32lbs) Case MaterialABS ConnectorsBNC Terminal Test Lead300mm long with croc clips. Display122 x 32 pixel Graphics LCD. Environmental Operational Temperature-15OC to +50OC (5OF to 122OF) Storage Temperature-20OC to 70OC (-4OF to 158OF) Ordering Information TDR 500 Included Accessories Test & Carry case with strap6420-125 Lead Set6231-694 User Guide6172-726 This instrument is manufactured in the United Kingdom. The company reserves the right to change the specifi cation or design without prior notice. Megger is a registered trademark Part No 6172-726 V02 Printed in England 1105 Megger Limited Archcliffe Road, Dover Kent CT17 9EN England T +44 (0)1 304 502101 F +44 (0)1 304 207342 E Megger 4271 Bronze Way, Dallas, Texas 75237-1019 USA T +1 800 723 2861 (USA ONLY) T +1 214 333 3201 F +1 214 331 7399 E Megger Z.A. Du Buisson de la Couldre 23 rue Eugne Henaff 78190 TRAPPES France T +33 (0)1 30.16.08.90 F +33 (0)1 34.61.23.77 E RadioFans.CN 收音机爱 好者资料库 VF 232.1m0.67R Battery State Indicator Blinking signal gives the warning of low battery indicating when the battery volts drop to 6.5V. Cursor Position This indicates the current cursor position in metres or feet. Velocity Factor Indicator Indicates the current velocity factor as either a ratio of the speed of light (R), or as m/s or ft/s. Menu The menu allows the units of the distance and velocity factor to be changed. To enter the menu, switch the instrument on holding down the warble key. To change the displayed units, press one of the velocity factor keys. The options available are m and Ratio, m and m/us, ft and Ratio and ft and ft/us. When selected, either switch the instrument off, or press the warble key to start testing. Cursor Left This control moves the cursor to the left. Range This is a bi-directional range control. Press the left side to decrease the gain, right side to increase. Cursor Right This control moves the cursor to the right. Power Pressing this button will turn the instrument on or off depending on the current state. Velocity Factor Use this key to change the velocity factor to a suitable value for the cable under test. Warble Press to select the warble functions, or to return to TDR functions. Warble function can be used to trace cables. VF + SPECIFICATION Except where otherwise stated, this specifi cation applies at an ambient temperature of 20OC. General Ranges30m, 100m, 300m, 1000m, 3000m. (100ft, 300ft, 1000ft, 3000ft, 10,000ft.) Accuracy 1% of range pixel at 0.67VF Note:- the measurement accuracy is for the indicated cursor position only and is conditional on the velocity factor being correct. Resolution1% of range. Input ProtectionFor connection to unenergised cable only. Output Pulse5 volts peak to peak into open circuit from 100 source. Pulse widths determined by range and cable impedance. GainAutomatic with gain and range. Velocity FactorVariable from 0.01 to 0.99 in steps of 0.01. Refresh RateThree times a second. Power DownAutomatic after 5 minutes with no key press. Warble5V pk-pk from 100, alternating between 810Hz and 1110Hz. BatteriesSix LR6 (AA) type batteries, Manganese-alkali or nickel-cadmium or nickel-metal-hydride cells. Nominal Voltage9V for Alkali or 7.2V for NiCad. Battery Consumption100mA nominal. (30 hours continuous use.) SafetyThis instrument is to be used on unenergised cable only. EMCComplies with Electromagnetic Compatibility Specifi cations (Light industrial) BS EN 61326-1,with a minimum performance of B for all immunity tests. RadioFans.CN 收音机爱 好者资料库