Roshan Enterprises Panchpakhadi, Thane, Maharashtra

If the gd is not proper then exchange line cards can not be protected from surge voltages. This is a specialized machine for testing pouyet krone e10b ipm g.d. Tube.

This Fault locater is used for detecting open and short faults in telecom/signal cables. When a faulty pair is connected to the tester, a LED indicates if the pair is open or short and the digital display will instantly give a reading of the distance to the fault (in meters). The unit is very compact and consumes much less power. It can be used in the field for 3-4 days without charging the battery. Due to the direct digital readout, the measurement is very accurate. An in-built timer saves the battery by switching unit to a power-save mode. This makes it totally user friendly and any operator having minimal knowledge can successfully locate the fault. This machine is based on the principle of Time Domain Reflectometry. Features Very small size and light weight. Easily portable. Ease of operation. Automatic measurement of distance. Use of high speed circuitry. Very low power consumption with built in rechargeable batteries. Gives 8-10 hrs. of uninterrupted working on batteries. Built in battery charger. Improved minimum and maximum fault location range. Tests any type of telecom cable. Manual settings for VOP for different types of cables. Auto shut down under idle running condition. Low-Battery Indication. Operation The cable fault locator is a portable field instrument working on Time Domain Reflectometry (TDR) principle, using advanced digital technology. It is designed to locate faults in any type of metallic cables, such as unloaded telecommunication or power, network or co-axial cables. It sends a pulse of energy on the cable that propagates towards the far end. This pulse returns to the sending end from the point of mismatch of impedance. The transmitted and reflected pulses simultaneously interact with each other effectively displaying distance of fault in metres from sending end. The velocity factor (VOP) is manually set for the type of cable selected. This machine can typically locate open and short circuit faults. It can also be used for other faults such as series and shunt, split pairs and ingress of moisture faults. It can also indicate locations of cable joints.

Low Insulation Faults can not be detected by normal TDR method but needs special technique. This machine is used for location of Low Insulation / Battery/ Earth faults. One good pair & one faulty pair are connected to the unit. The good pair is shorted at the far end. One leg of the faulty pair is connected to the good pair at far end. The unit indicates the distance of the good pair & the distance to the fault (in meters). Unit is chargeable battery operated. Features Battery operated, light weight Easy to use operation Direct measurement Use of high speed circuitry Digital display Very low power requirement Capable of giving more than five hours of uninterrupted working Built in battery charger Improved minimum and maximum fault location ranges Tests any type of telecom cable Low insulation fault distance measurement with bridge method Low battery indication Operation Pairs are tested first on MDF Test board & then one of the good pair out of it is connected to the machine. It is looped at far end. Similarly faulty pair (of low insulation / Battery / Earth type fault) is connected to this machine. Its far end is looped to good pair at same far end spot. Good pair distance is entered into the machine. In Null made Null pot is set to get 0 reading on display. Then In DF X1 mode we get direct distance of fault in meters.

Weight : 1.2 kg

This tester is useful for testing exchange and subscriber side of the line. On the exchange side we can check Exch. Voltage & Dial tone. On the subscriber side we can check the presence of AC voltage, Battery, Earth, Short-circuit and Condenser click. We can also give a ring to the subscriber and talk to them. There is also a provision to check exchange-side ISDN voltage. Similarly for broadband we can verify whether loop resistance is less than 1 K-Ohms. There is also a provision to send a tone to catch a pair. For testing line in field, Field line tester is also available. Features Compatible with MDF Test board Easy to use operation. Any layman can use it Measures Exchange side as well as Line side parameters Provision to give ring & speech facility Provision to measure ISDN voltage Provision to check loop resistance for broadband line Provision to feed tone on line to detect particular pair Very low power requirement. Mains operated Compact & light weight Direct measurement Use of high speed circuitry Tests any type of metallic telecom cable Operation Exchange side is connected to terminals marked “Exchange”. Similarly line side is connected to terminals marked “Line side”. Exchange Earthing is connected to Eth terminal. Where as Telephone handset is connected to terminals marked “Speech”. On Exchange side press “V” button, then meter will indicate Exchange voltage. For dial tone button we get dial tone on handset. On line side we can check Battery A/B, Earth A/B, Short circuit / Condenser click. We can also give Ring to party. If party lifts the handset we get LED indication. Then we can talk to party. There is provision to feed tone on the line by pressing “Tone” button. For broadband line we can check loop resistance by looping that pair at far end.

This tester is useful to test exchange and subscriber side of the line. On the exchange side, we can check exchange voltage and dial tone. On the subscriber side, we can check the presence of ac voltage, battery, earth, short-circuit and condenser click. We can also ring the subscriber and talk to them.

This is a specialized machine for testing Pouyet / Krone/ E 10B IPM / GD tube. If GD is not proper then exchange line cards can not be protected from surge voltage. Modulated signal equivalent to lightening signal is internally generated and is applied to GD tube.This will force the gas inside the GD tube to discharge and we get alarm from the unit. Individual section of GD tube like A or B limb can be tested. Similarly we have tester for testing 10 Ch GD tube magazine of Krone and Pouyet type. Features Easy to use operation. Any layman can use it Checks Pouyet / Krone / E-10B IPM / GD tube Checks individual limb Internally generates minimum gas discharge signal without damaging tube All types of fuses tested with their respective min signal strength For krone type ordinary fuse is also tested Very low power requirement. Mains operated Compact and light weight Direct detection Use of high speed circuitry Operation Insert the IPM/GD Tube into the appropriate socket. Select A or B limb. Apply Low signal by pressing "Low" button. Then for good GD tube gas will not discharge and we will not get any buzzer. Then press "High" button . This time high modulated signal will be applied. We should get buzzer for good tube. Repeat for other types of GD tubes.

In order to reduce Broadband and ISDN Line transmission losses, it is essential to check Earth resistance. With this tester we can check earth resistance up to 0.1 ohms. We can also measure soil resistivity. Unit works on chargeable battery. Necessary accessories along with charger are provided with unit. Features Measurement up to 0.1 Ohms Accuracy up to 2% Digital display Generated signal is not in range of harmonics of mains supply to avoid interference Test resistor are provided to confirm calibration Low battery consumption Battery is chargeable maintenance free type Heavy duty accessories provided for proper reading Operation Short left side two terminals E1 & P1 and connect it to point whose resistance is to be measured. This wire should be shortest possible. Connect other 2 wire provided along with unit to other two terminals. Fix the rods at app.10 to 15 meters in different directions. Pour a glass of water on the rod to make good contact. Select 2V range & press test button. Then display will give direct reading of earth resistance.  

Frequency : 128 Hz

This machine is used for location of Low InsulationBatteryEarth faults. One good pair and one faulty pair is connected to the unit. The unit indicates the distance of the good pair and the distance to the fault in meters.

This machine helps to avoid cable theft or damage by generating an instant alarm. One pair of the cable under test is connected to the machine and its far end looped. If the cable is cut, the unit generates a loud alarm and that channel’s lamp will glow.

This tester is useful to test exchange and subscriber side of the line. On the exchange side, we can check exchange voltage and dial tone.

This is used to find out route of underground cable. Tone is fed from Signal Generator to one of pair. With the help of sensor signal is picked up & amplified in receiver. Signal Strength is indicated on scale as well as heard in headphone. We can also detect particular cable out of bunch of cables. Features Route tracing of any type of telecom cable Depth measurement Cable identification out of bunch of cables Passive mode route detection of power cables Compact unit Easy operation Audio as well as visual display Frequency generated are out of range of harmonics of mains frequency Route tracing by direct feeding or by radiation method Low power consumption Operation One of the pair of cable, whose route is to be found out, is tested on MDF test board. If it is OK then it is looped at far end and its loop resistance is measured. Then it is grounded with the rod provided. Preferably no exchange earthing is used. Similarly its other end is connected to generator. Impedance is selected as per above loop resistance. Receiver is moved across the ground to get maximum signal in head phone. Different sensors are used for different purposes.

Frequency : Passive 50 Hz, Active 480 Hz, 1450 Hz, 9820 Hz

In the field it is difficult to test broadband line. Since Broadband signal is in digital format. This signal is converted into analog format by demodulation and it is indicated on the digital display. For proper operation of broadband, this signal strength must be within certain range. Features Easiest way to check broadband line Can be used in the field as well as in an Exchange Digital display of signal strength Provision to measure Exchange line voltage / ISDN line voltage Battery operated Inbuilt charger Due to simplicity of operation any layman can use it Very economical method of testing Easy identification of broadband line & ordinary line in the field itself Operation Connect the exchange side of line under test to the machine. Press Exchange Voltage button. Display will indicate exchange supply voltage. Then press B/B signal button. Machine will convert ADSL digital signal into analog format by our specialized signal processor & display signal strength in mV. This signal strength should be between 1200 to 1300 mV.

Low insulation battery earth faults can not be located easily. So the best way is to convert those faults into open or short faults.

Unmanned Exchanges / Proprieties can be monitored from central place by using IP cameras and internet. We can monitor different locations simultaneously. Features Monitoring can be done for any number of exchanges Live view of all locations Recording provision Old records will be automatically removed unless stored specifically Movements in day as well as in night can be monitored Necessary battery back up can be provided With particular IP address we can view from any place in world Different types of cameras can be used for different purposes Recording only for human movement to avoid unnecessary still picture recording Saves cost of security, manual surveillance Operation At the Site under surveillance, suitable cameras are fixed. They are connected through switcher to modem. IP signal received at monitor location is automatically recorded independently. Signal can be viewed from any place on particular IP address.  

When this module is fixed on Tagblock, the status of all 10 lines is immediately indicated. You can check the presence of exchange supply, reverse leg, loop, ring on line, spare line etc. OCB & Crone modules are available Features Easy to use operation. Any layman can use it Available for Pouyet & Krone type tagblock NE side as well as DP side can be tested Identifies working lines & non working lines Detects polarity reversal Direct detection of line status At a time all 10 lines can be tested STD / PCO can be checked for reversal Very much compact & hence handy Highly time saving Very much economical Operation Remove earthing plate if any on tag blog. Fix the module on the tagblock. Press it gently to make proper contact. Observe which lamps are glowing & which are off. Lines on which lamps are glowing are working lines. If A if positive Red Lamp will glow. If B is positive then other lamp will glow. If line has got ring, then lamp will flicker. In speech mode lamp will be dim.

Low insulation / Battery / Earth faults can not be located easily. So the best way is to convert those faults into open or short faults. This machine generates short duration modulated high signal pulses which are applied continuously to faulty pair. This changes characteristics of pair & that pair becomes open or short, thus easily locatable There is also a provision to give one leg / both leg current. Features Easy to use operation. Any layman can use it Low insulation / Battery / Earth fault converted into open or short fault Signal strength can be adjusted Provision to give one leg & both leg current Very compact unit & light weight Very low power requirement. Mains operated Use of high speed circuitry Useful for any type of metallic telecom cable Inbuilt protection for external loop Operation Faulty pair is tested on MDF Test board. If it has Battery/ Earth/ Low Insulation fault, then that pair is isolated from exchange side in MDF as well as subscriber side from pillar. Such pair is connected to A & B terminals. Similarly exchange earth is extended to machine. Select limb at which you want to apply signal. This signal is continuously applied to that leg / pair. Due to continuous bombardment of high power signal characteristics of that limb changes, converting that fault into open or short. We can also give one leg / both leg current.    

Artificial load is used for testing Exchange battery, UPS, Invertors etc. It is available in different ratings. There is a provision to change current in step. Overload protection is also provided. Unit is portable with wheels. Necessary cables are provided to connect it to battery. Features Easy to use operation. Any layman can use it Available in different ratings Voltage & load current indication Overload protection Good ventilation maintained to avoid excessive heat Portable to transfer on wheel Less power loss in connecting cable High power switching Wide range of batteries covered Accuracy within 5% Operation Connect battery under test .Select load current. It should be 10% of AH of battery capacity. Switch on unit. Unit will indicate battery voltage as well as current. Monitor battery voltage continuously. If it falls below specified threshold value disconnect battery from load bank & note down timing.

Accuracy : 3%

Weight : Varies with respect to models

Dimensions : Varies with respect to models