Sivananda Electronics

Lam Road, Nashik, Maharashtra

Digital Conductivity Meter Portable Conductivity Meter has been developed to facilitate easy determination of conductivity of non-ferrous metals based on eddy current principle. Instrument uses a probe which when placed on the surface of metal indicates conductivity on a linear scale panel meter. The instrument can be used to measure stressed conditions if they can be related to the electrical conductivity of the specimen. Whilst the accuracy claimed is 2% however, for high conductivity samples as accuracy of better than 1% is easily obtained. The users can also, if desired, use their own sample of known conductivity in the region of interest to enhance the accuracy. The instrument is supplied in a rugged carrying case which gives complete protection and has separate pocket for probe. The equipment can be used without removing it from the carrying case

The Component Comparator Model LCO - 2 is specially designed for high speed sorting of resist ors, capacitors and inductors. The equipment is equally suitable for both component manufacturers and bulk consumers for production, inward inspection and quality assurance testing requirements. The Model LCO - 2 uses a low level, 1 KHz test signal and brid ge principle for measuring percentage deviation. In addition to percentage deviation a phase detector is used to measure tand for capacitors. Four ranges of 1%, 2.5%, 10% & 20% FSD for deviation and single range of 1% (0.01) FSD for tand is provided. The e lectronic go - no go system is the regular features of model LCO - 2. These features makes it a versatile, high speed component comparator. A speed of 1500 pieces per hour even by unskilled operator is normal. The equipment is immune to short circuits, wrong selection of ranges, voltage fluctuation and mishandling which is likely to occur during use by unskilled operator.

Features of ATMEL AT89S52 Starter Kit: AT89S52 40 PIN DIP 16 X 2 ALPHANUMERIC LCD ON BOARD RTC 1307 ON BOARD EEPROM 24CXX ON BOARD ADC, MAX232 FOR RS232 SERIAL PORT COMMUNICATION 10 PIN IN-SYSTEM PROGRAMMING (ISP) CONNECTOR 4 PUSH PULL SWITCHES 2-BC547 TRANSISTORS. MCP3201 ADC UL2003 FOR STEPPER MOTDC MOTOR L293 FOR ROBOTIC APPLICATION ON BOARD REGULATED POWER SUPPLY RESET SWITCH 11.0592 MHZ CRYSTAL BELOW IC

LM358 BASED HEART BEAT SENSOR CIRCUIT: Heart beat is sensed by using a high intensity type LED and LDR. The finger is placed between the LED and LDR. As Sensor a photo diode or a photo transistor can be used. The skin may be illuminated with visible (red) using transmitted or reflected light for detection. The very small changes in reflectivity or in transmittance caused by the varying blood content of human tissue are almost invisible. Various noise sources may produce disturbance signals with amplitudes equal or even higher than the amplitude of the pulse signal. Valid pulse measurement therefore requires extensive preprocessing of the raw signal. The new signal processing approach presented here combines analog and digital signal processing in a way that both parts can be kept simple but in combination are very effective in suppressing disturbance signals. The setup described here uses a red LED for transmitted light illumination and a LDR as detector. With only slight changes in the preamplifier circuit the same hardware and software could be used with other illumination and detection concepts. The detectors photo current (AC Part) is converted to voltage and amplified by an operational amplifier (LM358). Output is given to another non-inverting input of the same LM358; here the second amplification is done. The value is preset in the inverting input, the amplified value is compared with preset value if any abnormal condition occurs it will generate an interrupt to the controller.

The Oil Test system Model OTS 2K1 is portable transformer oil Test system. It is a specially designed for accurate measurement of Loss Factor, Permitivity & Volume Resistivity Measurement of Transformer Oils & Petroleum jellys. The test fr equency is 50 Hz . The system is provided with Mode Selector Switch so that once the oil cell is connected, it can measure all Three parameters in different modes without handling the test leads. SPECIAL FEATURES   Single Equipment for Loss Factor, Pe rmitivity & Volume Resistivity Measurement of Transformer Oils & Petroleums.  Digital Readout of Insulation Resistance , Dielectric Constant , Tan Delta & ACDC Voltages.  Provision of Standard capacitor & Standard Resistor to quickly verify the p roper operation & calibration of System.  Provision of Guard terminal. No automatic guard potential regulator is required.  Provided with Three Terminal Oil cell & Heating Chamber for Oil Cell .  Digital Null detector provides highly accu rate results.  The equipment is compact, light, portable & Table top for Laboratory use. SIVA INSTRUMENTS OIL TEST SYSTEM MODEL:OTS 2K1 AN ISO 9001:2000 COMPANY

Automatic Dielectric constant, Dissipation F actor & Resistivity Measurement. Inbuilt Printer facility for T est Report Printing. Easy storage of Data up to 250 T est Results. PC Compatibility . F ully automatic operation Display : Alphanumeric LCD display K eyboard :20 K ey keypad providing numeric and soft function entries.

The oil insulation test kit is intended to be used for testing of dielectric strength of insulating oil used in T ransfor mer , Circuit breaker , CT s, PT s etc.

The motorised (Automatic) Oil Insulation test Kit is intended to be used for testing of Dielectric strength of insulating oils used in transformers & circuit breakers. The kit comprises of following: -  A control unit with a HT - transformer operates on mains voltage of 220 Volts.  A robust & sturdy motorised variac is provided to increase the voltage from 0 to 100 KV.  Zero start facility is provided for safety.  The HV chamber with interlocking to ensure operator safety.  Digita l volt meter for reading 0 to 100 KV.  Over voltage protection.  Very fast tripping at dielectric breakdown.  Automatic Motorised oil BDV with rate of rise of 0.5KV - 5KV Sec **  Push button's for control.  A testing transformer of 10 00 VA capacity for output 100 KV with 2 terminal bushings to support the testing cell with studs mounted on top of transformer.  Oil testing cell has mushroom cell, dimensions & gap in accordance with IS specifications with a gauge to calibrate the gap. AN ISO 9001:2000 COMPANY

Features  No Balancing and Calculation required to calcu late Volume Surface Resisti vity and Dielectric Constant.  Complies IEC 60250, IS 4487, Test jig Conform to ASTMD 257  Bui l t in Thermal Printer  Serial port RS232 for data downloading.  Can be used to check liquid sample with Three Terminal oil cell.  Storage 100 Test reports

Transformer Winding Resistance Meter is designed to measure the winding resistance of transformers, Inductors, generators a nd motor windings, Tap Changers, Bus Bar contacts, Power Cables Etc. It is specially designed fo r Highly Inductive objects . This i s only indigenous microhm meter which gives very fast readings for 3Phase Star - De lt a any combination . The built in open circuit Voltage of DC Supply ensures that core of the transformer is saturated for fast measurements to be taken. Care is taken to a bsorb the Back emf of such transformers. For user safety, Indication for discharges is provided on fron t panel , if the current through winding under measurement is disturbeddiscontinued. Instrument has built in 1 A regulated and highly stable current sour ce with current selection of 1 Amp , 1 00mA , 10mA and 1mA . Instrument uses ratio - metric circuit where the resistance of specimen is compared wi th known internal standard and 3 ½ digit LCD display is provided for resistance measurement in micro - ohm, milliohms and in ohms. An ISO 9001:2008

W e specialise in the design and manufacture of the test and measuring instruments for the cable industry . Kno wledge about need of our customers has allowed us to dev elop a range of equipments which have been widely accepted the industry. We are constantly putting our efforts to introduce state of the art technology in the field of test and measuring instruments. With these efforts we have de veloped Conductor Resistance Meter model CRM-1 for communication cables & copper wires.

TANDELTA SYSTEM EW-188 is specially designed for quality control of enameled wire. Tangent delta and the tangent data temperature Characteristic are the concepts often discussed in connection with enameled copper wire. The precise measurement of tangent delta is of higher importance for the characterization of hardening state of the enameled insulation. If an alternating voltage is applied to wire enamel, a small current passes through it which is phase shifted. A yard stick for this phase shift is tangent delta. In EW-188 a measuring frequency of 1 KHz sine voltage is applied to the sample. The result is phase shift between voltage and current which is proportional to tangent delta. This phase shift is detected with very precise phase detector circuit. EW-188 can be used for single point measurement as well as determinations of bending point. The temperature can be set anywhere upto 300 degree Celsius for single point measurement. Tan delta and temperature are displayed simultaneously. Further more the curve measurement can be automated on a Laptop PC through suitable windows based software. • DIGITAL READOUT FOR TEMPERATURE & TAN DELTA. • SOFTWARE BASED PID TEMPERATURE CONTROL. • WINDOWS BASED USER FRIENDLY SOFTWARE. • USB COMMUNICATION PORT FOR LAPTOP CONNECTION. • MULTIPLE GRAPH COMPARISON ON SCREEN. • SUITABLE FOR SINGLE POINT AS WELL AS BENDING POINT MEASUREMENT.

Digital Capacitance Meter Model : LS-16AD Digital Capacitance Meter LS 16 AD is specially designed for accurate measurement of Capacitance. It is portable and easy to carry. Test frequency used is 120 Hz, which allows error free measurement. 3 digit LCD DPM displays the Capacitance value. Test leads can be plugged into Cx sockets. Suitable range can be selected through selector switch . Reading will be displayed on DPM after pressing push button provided on front panel.