TX2004 Manual.cdr - BI Communications
Contents
1. TDR Cable Fault Locator Operating Instructions BI Communications Innovation through Technology Section 1 Section 2 Section 3 Section 4 Section 5 CONTENTS Notices 1 1 Receiving the TX4000 c ceeeeeeeeeeees 3 12 Safety notices uu 1 3 Standard S edern rora NETET ENEA Introducing the TX4000 2 1 TX2004 TO at r ES orasi 5 2 2 Specifications 6 2 3 Accuracy First operations 3 1 Preparing the TX4000 ccceeeeeeeeeeeees 3 2 Menu amp screen displayS ceceeeeeeees 3 3 Set auto SHULGOWMN aissis 3 4 Set unit of measure 3 5 Set Velocity of propergation ue 3 6 How to determine unknown Vp values 9 Using the TX4000 4 1 Setting Cable parameters c eeeee 10 4 2 Auto fault lOCAtIOM iiyaa erine 11 4 3 Manual fault location 00 0 eee 11 4 4 Connecting to a cable to be tested asl 4 5 CUrsOr CONTOS iinit x12 4 6 Selecting range scales ceceeeeeteeeeeees 13 4 7 Scan hold facility 2 0 0 eeeeeeeeeeeteeeeeees 13 4 8 Gain setting wt 4 9 Backlight 14 4 10 Contrast wi l4 4 11 Tone generator 4 12 Typical fault displays scssssseeeeeeeeeeeeeeeeee45 4 13 Typical cable Vp and Impedance values 15 Maintenance 5 1 Battery replacement ccccceeeeeeneeees 16 5 2 Cleaning 5 3 StOPAGE ses sssssssssevesssssvsssssesesesessesessssessssssssvee2. of the cable under test to be accurately set homogeneity of the Vp along the cable length and accurate cursor positioning 2 3 Accuracy The TX4000 is able to measure distances to faults and cable lengths to an accuracy of 1 This measurement accuracy is based on the correct value of Vp being used for the cable under test and homogeneity of the Vp along the cable length If the Vp is set incorrectly by the operator or the Vp varies along the length of the cable then additional errors will be incurred and the measurement accuracy will be affected Note The Vp is less well defined with unshielded multicore cable including power cable and is lower when a cable is tightly wound on a drum than when installed Section 3 First Operation 3 1 Preparing the TX4000 for use Press button to power the tester the following screen will be displayed COMMUNICATIONS TX4000 4 1 Model 2 Software version programmed into tester 3 Battery condition indicator all black battery fully charged as charge decreases symbol changes to white Battery condition indicator is permanently displayed Prior to use the following parameters will need to be set 1 Auto shutdown section 3 3 2 Select unit of measure section 3 4 3 Selectvelocity of propergation unit section 3 7 3 2 Menu and Screen Displays Start up display E COMMUNICATIONS TX4000 v3 08 Menu display Trace display Vp 67 Z 500 MFL TDR
3. quality management system of BI Communications fulfils the stringent requirements of the international quality standard BS EN ISO 9001 Quality System Certificate No 12500 6 1 Contacting Us BI Communications Ltd Unit 7 Buckwins Square Burnt Mills Ind Estate Basildon Essex 5513 1BJ UK Tel 44 0 1268 729393 Fax 44 0 1268 727987 Email bicomms dircon co uk Web www bicommunications com 17 ZBI Communications innovation through Technology
4. When set in auto fault location AFL the TX4000 will scan the cable run and the cursor will automatically stop at the first event To start the scan press key AFL if the scan stops within the first meter 3 feet it will identified the connection between the TX4000 and the cable under test as an event press the key AFL to continue the scan The end of the cable run would normally be identified as an open or short refer to section 4 12 for typical fault displays Small events identified in the cable run may be enlarged by increasing the gain thereby making the fault more obvious refer to section 4 8 Gain Settings 4 3 Manual Fault Location When set in manual fault location MFL the operator will need to visually scan the displayed trace and manually align the cursor to the event identified refer to section 4 testing a cable To select manual or auto fault location use navigation key to scroll to displayed setting AFL of MFL use key q or p to change setting Press to exit 4 4 Connecting TX4000 to a cable to be tested Attach the test lead set to the TX4000 via the 2 safety sockets located at the top of the unit 1 Ensure that no power supply or equipment is attached to the cable to be tested 2 Ensure that the far end of the cable under test is open or shorted not fitted with a resistive termination 3 Attach the TX4000 to one end of the cable to be tested 11 Coaxial Cable Shielded Cable L Twisted Pai
5. ce 5 1 Battery Replacement Disconnect the instrument from any cable or network link e Turn the instrument off e Loosen the two black screws and remove the battery compartment cover e Replace the batteries with 4 x 1 5 volt Alkaline batteries observing the polarities e Refit the battery compartment cover and refit the two screws 5 2 Cleaning Disconnect the instrument from any source of electricity e Turn the instrument off e Use a soft cloth lightly dampened with soapy water wipe over the instrument rinse the cloth in clean water squeezing out any excess water wipe over the instrument removing any soap residue dry instrument with a dry cloth e Do not splash water directly on the instrument e Donotuse alcohol solvents or hydrocarbons 5 3 Storage If the instrument is not to be used for a period of more than 60 days it is recommended that the batteries are removed and stored separately see 5 1 16 Section 6 Repair and Warranty The instrument contains static sensitive devices and is not user serviceable If an instrument fails or its protection has been impaired it should not be used but sent back for repair by suitably trained and qualified personnel New instruments are guaranteed against breakdown due to manufacturing or component defects for 36 months after the purchase date by the user Note Any unauthorized prior repair or adjustment to the instrument will automatically invalidate the warranty The
6. dards The TX4000 has been manufactured in accordance with and meets the requirements of the following international standards SAFETY IEC 61010 1 EN 60950 EMC BS EN 61326 1 Water Dust Proof to IP54 Section 2 Introducing the TX4000 The TX4000 is a hand held Time Domain Reflectometer with 11 range scales covering the range 0 4000 meters with a 7 mater first range scale and a 0 5 meter dead zone near and far end faults are clearly displayed onits 128x64 pixel back light Liquid Crystal Display The Auto Fault Location key will move the cursor directly to the first event or fault thus eliminating the need to visually interpret the wave form When set in manual mode the wave form may be visually scanned as on conventional TDRs In both modes the user variable gain covering the range of default to 64 db s may be used to magnify small events identified on the waveform The scan lock feature will allow the user to hold the trace for closer examination Designed for identifying and locating faults on all metallic cables with two or more insulated conductors The TX4000 has impedance matched circuits for 25 50 75 and 100 ohms and with velocity of propergation settings from 1 99 or the equivalent in feet or meters micro second will cover the range of power data communication and CCTV cables Housed in a rugged IP54 rated ABS enclosure and weighing only 350 grams 12 ounces the TX4000 is suitable for outside use 2 1 TX2004 Feat
7. ee Section 1 Notices 1 1 Receiving the TX4000 Upon delivery of the TX2003 ensure the contents are consistent with the packing list notify your supplier of any missing items If the equipment appears damaged notify your carrier and supplier immediately giving a detailed description of any damage save the damaged packaging to substantiate your claim The TX4000 includes a 0 5 mtr test lead soft case and user manual 1 2 Safety notices A Warning AN This instrument meets the safety requirements of IEC61010 1 1995 TheTX2003 is designed for use on de energized circuits only Connection to line voltages will damage the instrument and could be hazardous to the operator This instrument is protected against connection to telecom network voltages according to EN61326 1 Safety is the responsibility of the operator International Electrical Symbols This symbol signifies that the instrument is protected by double or reinforced insulation Use only specified replacement parts when servicing the instrument This symbol on the instrument indicates a WARNING and that the operator must refer to the user manual for instructions before operating the instrument In this manual the symbol preceding instructions indicates that if the instructions are not followed bodily injury installation sample and product damage may result Risk of electric shock The voltage of the parts marked with this AN symbol may be dangerous 1 3 Stan
8. ge To exit press X 4 7 Scan hold and Continuous Scanning Modes This function only operates in manual fault location mode When the TX4000 is first switched on itis set to Continuous scan mode In this mode the TX4000 fires pulses into the cable under test thus enabling intermittent faults to be identified Scan hold allows the user to hold a trace for closer examination and to disconnect from test cable whilst leaving the trace displayed To select scan hold press key AFL for approximately 4 seconds then release scan hold icon amp is displayed at the bottom right hand corner to exit press key AFL and release 4 8 Gain Settings The TX4000 has pre set gain for each of its 11 range scales there is in addition to this a user controllable gain to a maximum of 64db in 1db steps To use this function use navigation key to scroll to db setting press lt q to decrease gain gt toincrease gain press Xto store setting 13 4 9 Backlight The LCD display is fitted with an electro luminescent backlight to enable easy viewing under a variety of different lighting conditions The backlight is switched on and off with the X key 4 10 Set Contrast from menu display TDR Press to move m to contrast Press V 2 mlus lt q to decrease contrast press gt to oe increase contrast The backlight is Contrast E switched on and off with the key Shutdown 2minutes 4 11 Tone Generator The TX4000 may also be used as a
9. i Vp Vc I Vp 67 Metres Contrast 7 l Shutdown 1 minute l dB Def To select menu or TDR press 4 or gt as indicated on the TX4000 front panel 3 3 Set Auto Shutdown To preserve battery life the TX4000 is TDR fitted with an auto shutdown feature vi2_mius Shutdown time is selectable between 100m us Metres disabled 1 2 3 and 5 minutes Contrast To change settings press w to move Shutdown 2minutes to shutdown use or to select setting press to store setting to memory 3 4 Set Unit of Measure from menu display TDR Press W to move m to unit of V 2 mlus measure feet or meters 100m us Press lt q or gt to scroll between feet Metres Contrast ME and meters Press X to store Shutdown 2minutes selected setting in memory Note When unit of measure has been selected this will automatically change the V 2 figure which will also be displayed in the selected unit of measure 3 5 Set Velocity of Propergation from menu display Velocity of propergation Vp may be set as or speed in micro seconds ms The unit of measure the speed is displayed in feet or meters will be determined by the setting selected in section 3 4 Press W to move to displayed unit Sie aie press q to scroll between v 2 M Ms or 100m us Vp Press X to store selected Metres setting in memory TDR selected Contrast ME Shatdcwn 2min values will be automatically set 3 6 How to dete
10. r Multi conductor Cable umeo ania Yad eoiude19 Bs Coaxial Cable Connect the red clip to the centre wire and the black clip to the shield screen Shielded Cable Connect the red clip to a wire adjacent to the shield and the black clip to the shield Twisted Pair Separate out one pair and connect the red and black clips to the two wires of the pair Multicore Cable Connect the clips to any two wires 4 5 Cursor controls Having followed the set up procedures in the preceding sections a typical display showing impedance anomalies is shown below Further examples are shown in section 4 12 Vp 67 Z 509 MFL l The vertical cursor line is moved left or right along the line of the trace by pressing and gt buttons to determine the distance to the event Position the cursor at the beginning of the event and read off the distance at the bottom left corner On the fault display shown above a low impedance fault occurs at 64 meters shown by a negative spike and a high impedance at 129 meters The open end of the cable is shown as a large positive spike this is used to determine the end of the cable run and the overall length of the cable being 180 meters 4 6 Selecting Range Scales The TX4000 has 11 range scales covering the range of 0 to 4 000 meters To select a range scale or scan the cable run press navigation key to scroll to range scale press lt q to decrease range press gt to increase ran
11. rmine Vp Settings If the TX4000 is to be used with a cable type for which the Vp is unknown this must first be determined determined by the setting selected in section 3 4 1 Take a sample of the cable at least 100m or 300 ft long 2 Measure the actual length of cable using a rule or tape measure or some other reliable method 3 Connect the TDR TX4000 and adjust the Vp setting such that the tester gives a correct reading of the sample length refer to section 4 1 Setting cable parameters Section 4 Using the TX4000 Upon completion of the set up procedures in section 3 press X to return to start up display and select TDR The following screen will be displayed Trace display Vp 67 Z 500 MFL 9 Vp Setting Impedance setting Z Manual Auto Fault Location Range scale Battery condition indicator Scan hold icon User variable gain Cursor distance reading Cursor 0 Output pulse SOON O ORO N 4 1 Setting Cable Parameters Velocity of Propergation Vp Impedance Value Z Use navigation key to scroll to selected parameter when parameter is highlighted use lt or tochange values press navigation key to move to next parameter when set up is completed press X to store settings If cable Vp is unknown refer to section 3 6 upon start up The TX4000 will display the values last used 10 4 2 Auto Fault Location The TX4000 may be used in auto or manual fault location modes
12. tone generator to trace and identify cables and wires The user will need a conventional inductive tone probe within the range 810 Hz to 1110Hz To select tone generator from menu display TDR Press to move m to TDR Press V 2 m us lt q to scross between TDR and Tooms warble Press the button to exit Metres Contrast Shutdown 2minutes When tone has been selected connect test lead to cable pair to be traced and using tone probe which will emit a tone the volume will increase the nearer the probe is to the cable being traced Note The auto off function is disabled in tone generator mode so that the tone can be injected into a cable for extended periods while tracing takes place 14 4 12 Typical Fault Displays The following diagrams show typical fault traces to assist you in the identification of faults using the TX4000 OPEN CONDUCTOR SHORTED CONDUCTOR SPLICE tral BRIDGE TAP SPLIT RESPLIT TER T Di FRAYED CABLE WATER INGRESS TAP SPLITTER 4 13 Typical Cable V P and Impedance Values Type Vp Cat5 STP 72 Cat5 UTP 70 Coax Air 98 Coax Air Space 94 Coax Foam PE 82 Coax Solid PE 67 Z 100 100 50 75 50 75 50 75 50 75 Type Vp Z T Pair Jelly PE 64 100 T Pair PE 67 100 T Pair PTFE 71 100 T Pair PVC 58 100 T Pair Paper 72nF 88 100 T Pair Paper 83nF 72 100 15 Section 5 Maintenan
13. ures OANDOARWN Output via 2 x 4 mm safety sockets LCD displaying start up screen Cursor left key increase selected value Cursor right key decrease selected value Auto fault location scan hold Navigation button Escape Return Back light on off Power on off 2 2 Specifications Ranges Meters Feet Range Selection Accuracy Resolution Sensitivity Velocity Factor Output Pulse Output Impedance 7 15 30 60 120 250 500 1km 2km 3km 4km 20 45 90 180 360 750 1500 3000 6000 10 000 14 000 Manual range control Auto range 1 of selected range Approx 1 of range Min 3 pixel return at 4km on 0 6mm PE TP Adjustable from 1 to 99 5 volts peak to peak Into open circuit Selectable 25 50 75 amp 100 ohms Output Pulse Width3 ns to 3 ms Automatic with range Scan Rate Tone Generator Battery Life Power Supply Power Down Back Lit Display Voltage Protection Operating Temp Storage Temp Dimensions Weight Safety EMC Water Dust Proof 2 scans second or scan held pre set for each range scale 810 1100Hz 30 hours continuous scanning 6 volts 4 x 1 5 AA Alkaline cells Selectable 1 2 3 5 minutes or disabled 128 x 64 pixel 250 volts AC 10 50 C 20 70 C 165 x 90 x 37 6 5 x 3 5 x 1 5 ins 350 gms 120z IEC 61010 1 EN 60950 BS EN 61326 1 IP54 Measurement accuracy of lt 1 assumes the instrument setting for velocity of propergation Vp
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