ELECTRONIC INSTRUMENTS & DEVICES Peenya, Bangalore, Karnataka

Constant potential chargers are very useful in conducting tests like Charge AcceptanceWater Loss Test on Lead Acid Batteries. They also find application in charging VRLA batteries which are sensitive to over charging. These charges are electronically controlled to maintain charging voltage constant. Special filters ensure smooth charging current. Built in timer terminates charging after preset time. These are available in wide range to change any number of batteries at required current.

Type : Electric

Input Voltage : 240-440V

Application : Industrial

ELIND High Rate Discharge Testers are designed to test crankingperformance of Automotive (SLI) Batteries as per various National and International specifications. The unit comprises of Electronic Active Load to discharge Battery at high current. (Normally at 3*C20 or 5* C20) keeping the current constant through out the test. The test is terminated automatically when the Battery reaches the preset ‘End Voltage’.Micro processor based digital timer with non volatile memory records the discharge time precisely up to 0.01 seconds. The unit is rated for short duty of Max. up to 10 minutes. However it can be used for continuous discharge at lower currents (30% of its max. capacity) to test Capacity of Battery at C1, C3, or C5 ratings.   PRODUCTION LINE TESTER: ELIND Production Line Tester is used for routine Pre dispatch testing of batteries to ensure that the battery is free from manufacturing defects like poor inter cell joints, missing separators, lead tree shorting etc. This checks the performance of battery under high discharge current. The test takes only 5 seconds and is recommended on 100% batteries to avoid faulty batteries leaving the manufacturing unit.

Battery Plate Formation is an important process which directly affects the quality,capacity and life of Battery. This is an electrochemical reaction between the electrolyte (Sulfuric Acid) and the active material on the Battery Plates (lead oxide). For achieving quality plates it is important to ensure that the Formation Rectifier delivers reasonably smooth and Constant Current and the charging is terminated after predetermined quantum of electric charge (Ampere Hours) is passed through the Plates. ELIND Thyristor (SCR) controlled Rectifiers deliver constant current DC with minimum AC ripple in the output which ensures better quality plates by preventing excessive heating of electrolyte. Output voltage and current are precisely monitored on Digital meters. Micro Controller based digital Ampere Hour Controller / Digital Timer facilitates automatic termination of formation ensuring fully charged plates batch after batch (Avoids rejection of plates due to over / under charge) ELIND Battery Plate Chargers are available in wide range of voltages and current ( 90 to 540 volts and 30 to 500 Amps ) to suit customers’ requirement. ELIND Rectifiers are designed liberally to give long trouble free life. The transformer and DC filter are housed in steel tank designed for natural oil cooling and Rectifier devices are natural / forced air cooled. Units are protected against input Negative Phase Sequence / Phase fail and output overload and short circuit. HRC fuses on AC input and DC output provide general protection to Rectifier. Micro Controller/PC based data acquisition system can be incorporated for monitoring and logging parameters like voltage, current, temperature etc at preset interval to ensure good quality of plates/batteries batch after batch

Quick charging is the essence of these chargers. The charging is totally automatic and in two stages. First stage comprises of bulk charge, when approximately 75 to 80% of charge is provided to battery in a short time of 3 to 4 hours by charging the batteries at higher current, till the terminal voltage reaches to about 2.3 to 2.35 volts per cell. There after in second stage the charging current is substantially reduced to avoid gassing of electrolyte. The charger automatically switches off after preset time of 1 to 6 hours. All these controls are achieved through dedicated micro controller based electronic circuits to give fail proof charging operation.

These are electronically controlled Constant Voltage / Constant current chargers to charge stand by batteries used for cranking of Generator sets, Back up power supplies for lift, DC UPS systems, telephone exchange etc., Charging current is automatically selected based on charge condition of batteries and when batteries get fully charged it is put on float charge to compensate for self discharge and hence personal attention is not required.These chargers are custom designed to charge required number of Batteries/ cells connected in series at desired current.

Elind Battery Universal Tester as the name suggests, is a versatile multi testing station designed to test all types of lead acid as well as Ni-cd Batteries as per various National and International specifications. The unit can be used for conducting any of the following tests. Capacity test Charge / Discharge Cyclic Test Endurance Test / Resistance to over charge test Ampere Hour / Watt Hour efficiency test Charge Acceptance test Water loss test Retention of charge test The unit comprises of electronically controlled constant current / constant voltage Battery charger and constant current discharger, along with Micro controller based programmer with LCD display to set Charge / Discharge / Pause program sequence, Charge / Discharge current and Step termination parameters like time, voltage, Ampere hours and number of cycles etc. Built in data logger sends test data to a printer or to a personal computer at set time interval. Test data can be printed on a 80 column serial printer or recorded / displayed on personal computer through user end PC software. Stored data can be used to draw graphs of voltage / Current / AH / Temperature / Time as per requirement.   SPECIFICATIONS:   INPUT : 1 Phase AC 200-240 volts / 3 Phase 380-440 volts, 50Hz. CONTROL : Charging-Constant Current / Constant voltage + 1%Discharging – constant current + 1% CH / DCH Time : 1 Second to 100 Hours (99 Hrs 59 Min 59 Sec). NO. OF STEPS / CYCLE : 8 Steps of Charge, Discharge Or Pause. STEP TERMINATING PARAMETER : Time / Voltage / Ampere Hours. CYCLES : 1-9999 Cycles. INDICATIONS : Digital Voltmeter & Ammeter Charge / Discharge / Pause and Cycle complete. PRINT INTERVAL : 1sec to Hours. DATA ACQUISITION : Battery / Cell voltage,Charge / Discharge Current, Amp-Hours,Water bath / electrolyte Temperature,Real time, Date, Mode, (Ch / Dch / Pause). PROTECTION : Against overload, Short ckt., Rev. polarity.

Constant potential chargers are very useful in conducting tests like ChargeAcceptance/Water Loss Test on Lead Acid Batteries. They also find application in charging VRLA batteries which are sensitive to over charging. These charges are electronically controlled to maintain charging voltage constant. Special filters ensure smooth charging current. Built in timer terminates charging after preset time. These are available in wide range to change any number of batteries at required current.

Frequency : 50 Hz

ELIND Rated Capacity Tester is used for measuring Ampere Hours Capacity of battery at desired rate viz., C20, C10, C5 etc as per various National as well as International specifications. It comprises of electronic active load to discharge Test Battery at constant current which can be set precisely to desired level by adjusting a multi turn potentiometer. The test is terminated automatically when the battery voltage reaches the set END voltage and the time of discharge Ampere Hours discharged is recorded precisely on digital Timer or Ampere Hour meter.

The Battery Load Tester is an important instrument in checking the battery’s performance on load. On open circuit, the battery may display appropriate voltage, but the actual battery condition can be judged only by checking the battery voltage on load, i.e., by loading it to an appropriate current. The Battery Load Tester unit, when connected to the battery under test, initially indicates the battery voltage on open circuit. Subsequently, it loads the battery for 5 seconds, and monitors & displays the on-load battery voltage. On the basis of this voltage, the battery is adjudged as GOOD, WEAK or BAD.

Salient Features   Multi Functional : Can be used to conduct almost all electrical tests. Micro Controller based user friendly programmer. Data Logging facility to log test data. Connectivity to personal computer Facility to draw graphs of Volt / Current / Temperature / Time. Non volatile memory to save test data & selected program during power supply failure. Simple user friendly front panel controls & indications. Robust & liberally rated to give long trouble free service. Modular Design with asthetic looks.

Phase : Single Phase/ Three Phase

Electronically Controlled Constant Current Charging. Specially Designed Filters For Low Ripple (Pure DC). Latest Digital Controls For Accuracy & Reliability. Isolated DC Output to Ensure Safety To Operators. Digital Metering For Accurate Monitoring. Rugged Design For Long Trouble Free Service.

High Rate Discharge Testers are designed to test crankingperformance of Automotive (SLI) Batteries as per various National and International specifications. The unit comprises of Electronic Active Load to discharge Battery at high current. (Normally at 3*C20 or 5* C20) keeping the current constant through out the test. The test is terminated automatically when the Battery reaches the preset ‘End Voltage’.Micro processor based digital timer with non volatile memory records the discharge time precisely up to 0.01 seconds. The unit is rated for short duty of Max. up to 10 minutes. However it can be used for continuous discharge at lower currents (30% of its max. capacity) to test Capacity of Battery at C1, C3, or C5 ratings.

Salient Features:   Electronically Controlled Constant Current Charging. Specially Designed Filters For Low Ripple (Pure DC). Latest Digital Controls For Accuracy & Reliability. Isolated DC Output to Ensure Safety To Operators. Digital Metering For Accurate Monitoring. Rugged Design For Long Trouble Free Service. Optional Features: Automatic Termination Of Charge Through Ampere – Hour Controller/Timer. Temperature Compensated Charging With Built-in Discharger For Green Plate Charging. Logging Of Voltage, Current, Amp-Hrs, Temperature Etc. Green Plate charging is very effective and economical way of charging plates, where in the process of formation of plates is omitted. The pasted plates after curing (Green Plates) are assembled in to batteries and are straight away charged. This saves time, energy and money by skipping the plate formation process altogether. This requires to be charged on special temperature compensated chargers to provide slow and steady charge over an extended period of time to ensure that the electrolyte temperature does not exceed safe limits. Battery chargers with multiple outputs of say 3, 6 & 12 channels can be provided, each having independent control and monitoring of charging current & Voltage. Each channel can be designed for charging 10, 20 or more No. of batteries connected in series at desired current. Chargers with built in Dischargers are also supplied with micro controller / Computer controlled programmers with data acquisition.

These models are designed to charge number of batteries connected in series at constant current which can be set precisely through potentiometer. Battery Selection is done through a Rotary switch. Battery voltage and Charging current is monitored on digital voltmeter and ammeter. Specially designed DC filter circuit provides smoother charging current. Wide range of standard models are available to charge 6, 10, 15 , 20 Nos of 12 volts Batteries in series at desired charging currents. Such multiple circuits can be supplied in single unit to charge large number of batteries simultaneously. Other features include electronic protection for Overload / Short circuit, AC/DC fuses for general circuit protection, Indication for Mains ON, Reverse Polarity, Charger ON etc., Optional feature of automatic termination of charging can be provided to terminate charging, on reaching set time, ampere hours or voltage.

Salient features   Electronically controlled constant current/constant voltage charging. Current/Voltage can be set precisely. Simple user friendly front panel controls. Special DC filters for smooth charging current. Digital read out for charging current/Battery voltage. Electronic protection against short circuit/overload. Liberally rated devices ensure long trouble free service. Auto termination of charging after present time, voltage or ampere hours. Modular design with aesthetic looks.