How often should testing instruments be calibrated?

For optimum measurement accuracy and reliable performance, we recommend recalibrating the instrument every 12 months.

Calibration is performed exclusively at our factory facility, as on-site calibration is not available for most of our instruments. To arrange recalibration, please visit our Contact Us page and contact us by phone or email. Our team will assist you with the recalibration process and provide the necessary instructions for sending your instrument to our facility.

Iron loss determines how much energy is wasted inside transformer or motor cores due to:

  • Hysteresis loss
  • Eddy current loss

Lower iron loss results in:

  • Higher efficiency
  • Reduced operating temperature
  • Lower energy consumption
  • Better product performance

The tester can evaluate various soft magnetic materials, including:

  • CRGO steel
  • CRNO steel
  • Motor laminations
  • EI laminations
  • Transformer laminations
  • Silicon steel sheets

A Turns Ratio Meter measures the ratio between primary and secondary transformer windings. It verifies that transformers are manufactured correctly and helps detect winding defects before commissioning.

Yes. While its primary function is ratio measurement, abnormal readings may indicate:

  • Shorted turns
  • Incorrect winding connections
  • Open circuits
  • Manufacturing errors

Further diagnostic tests may be required to identify the exact fault.

A power analyzer can measure:

  • Voltage
  • Current
  • Apparent Power
  • Power Factor
  • Frequency
  • Harmonics

These measurements help evaluate electrical system performance.

Harmonics can cause:

  • Increased heating
  • Additional core losses
  • Reduced efficiency
  • Equipment malfunction
  • Power quality issues

A power analyzer helps identify harmonic distortion for corrective action.

Our instruments are widely used in:

  • Transformer manufacturing
  • Motor manufacturing
  • Electrical steel production
  • Core manufacturing
  • Quality control laboratories
  • Research institutions
  • Calibration laboratories

Yes. Our instruments are designed to support testing according to internationally recognized standards wherever applicable, ensuring accurate, repeatable, and reliable measurements for industrial and laboratory applications.

A good insulation coating minimizes electrical contact between adjacent laminations, reducing eddy current losses and improving transformer efficiency. Franklin testing helps verify coating quality before assembly.

What is the DXL700 Three-Phase Power Analyzer used for?

The DXL700 is designed to accurately measure electrical parameters in single-phase and three-phase AC systems. It is used for transformer testing, motor testing, power quality analysis, energy audits, laboratory measurements, and industrial maintenance.

The DXL700 measures a comprehensive range of electrical parameters, including:

  • RMS Voltage
  • RMS Current
  • Apparent Power (kVA)
  • Power Factor
  • Frequency
  • Harmonics

Yes. The analyzer supports operation with external CTs and PTs, making it suitable for measuring high-current and high-voltage industrial systems.

Yes. The DXL700 accurately measures both balanced and unbalanced loads, making it suitable for real-world industrial power systems where phase loading is often unequal.

For optimum accuracy, annual calibration is generally recommended.

The DXL700 supports common power system configurations, including:

  • 4 Wire method – RYB -Black
  • 3 Wire method – Phase to Phase connection for 3 Phase system
  • Two Watt Meter Method – 3rd phase is disabled

This allows it to be used across a wide range of industrial and commercial applications.

True RMS measurement ensures accurate readings even when voltage or current waveforms are distorted by nonlinear loads such as VFDs, UPS systems, inverters, and switched-mode power supplies. It provides more reliable measurements than average-responding meters.

Yes. The DXL700 can analyze voltage and current harmonics, helping identify power quality issues caused by nonlinear loads and electronic equipment.

Excessive harmonics can lead to:

  • Transformer overheating
  • Increased energy losses
  • Motor vibration
  • Reduced equipment life
  • Poor power factor
  • Malfunction of sensitive electronic equipment

Monitoring harmonics helps improve overall power quality.

The DXL700 is widely used in:

  • Transformer manufacturing
  • Motor manufacturing
  • Electrical equipment testing
  • Industrial maintenance
  • Power utilities
  • Research laboratories
  • Educational institutions
  • Calibration laboratories
What is the TRM200 Turns Ratio Meter used for?

The TRM200 is used to measure the turns ratio, polarity, LT voltage, and excitation current of single-phase transformers for quality control, manufacturing, maintenance, and verification.

The TRM200 can measure turns ratios from 1:1 up to 1:1200.

The accuracy is ±0.1% up to 1:200, ±0.5% from 1:201 to 1:500, and ±1% from 1:501 to 1:1200.

Yes. The TRM200 displays transformer polarity along with the turns ratio measurement.

Turns ratio testing confirms that the transformer winding turns are correct and helps detect manufacturing errors, incorrect tap connections, shorted turns, or winding defects.

After power-up, wait approximately 5 to 7 seconds until the display shows “Meter Ready” before starting the test.

After pressing the Start button, the measured turns ratio, polarity, LT voltage, and current are displayed within about 2 to 3 seconds.

The instrument operates from 230 V AC with a tolerance of ±10%.

Yes. Incorrect HT and LT connections can result in wrong turns ratio and polarity readings. Always verify the connections before testing.

Yes. The instrument is designed for use in transformer manufacturing facilities, testing laboratories, quality control departments, and maintenance environments.

Check all HT and LT connections, repeat the measurement, and if the error persists, the instrument may require calibration or maintenance.

The instrument provides a 5-digit measurement resolution for accurate turns ratio readings.

The instrument measures 280 × 90 × 280 mm and weighs approximately 3.5 kg, making it compact and portable for field and laboratory use.

Periodic calibration every year is recommended to maintain measurement accuracy and reliable long-term performance.

The TRM200 offers fast measurement, automatic polarity indication, compact size, high accuracy, simple operation, and reliable transformer ratio verification for production and maintenance applications.

What is the DW22 Single Sheet Tester used for?

The DW22 measures the iron loss (W/kg) of electrical steel sheets, including CRGO, CRNO, motor laminations, EI laminations, and other electrical steel materials using the single sheet testing method.

The DW22 can test CRGO steel, CRNO steel, electrical steel sheets, HR steel, motor stampings, EI laminations, and both oriented and non-oriented electrical steels.

No. The DW22 supports various specimen sizes and can test small (Minimum size of surface = 45 mm × 15 mm) as well as large samples using interchangeable probes.

The DW22 directly measures iron loss in Watt/kg while internally measuring voltage, current, and magnetic induction to calculate the result.

The DW22 supports testing at both 50 Hz and 60 Hz.

The DW22 can generate magnetic induction up to 1.8 Tesla for specimens up to 0.65 mm thickness.

The DW22 uses a magnetic probe containing primary and secondary windings to complete the magnetic circuit with the specimen. The measured electrical signals are processed to calculate iron loss in Watt/kg.

Yes. With the optional small probe, the DW22 is ideal for testing motor laminations, EI laminations, and other small electrical steel components.

You will be getting 1 Big probe with the instrument purchase, you can specify which probe you would like to purchase at the time. You can also buy multiple probes with 1 instrument.

Yes. The DW22 is specifically designed for fast routine inspection, incoming material verification, and production quality control.

The DW22 supports electrical steel thicknesses ranging from 0.18 mm to 0.65 mm.

What is the FT300N1 Franklin Tester used for?

The FT300N1 measures the surface insulation resistivity between electrical steel laminations to evaluate the quality of insulation coating.

Good insulation between laminations minimizes eddy current losses, improves transformer and motor efficiency, and reduces core heating.

The FT300N1 performs testing according to BIS 649, ASTM A717, and IEC 60404-11 standards.

The instrument measures voltage, current, surface insulation resistivity (Rj), and combined insulation resistivity (Ri) for one side of the specimen. 

The FT300N1 uses ten precision brass contact electrodes along with carbide drills to ensure accurate insulation resistance measurement.

Yes. The FT300N1 stores measurements for Side A and Side B of each specimen and automatically calculates the combined insulation resistivity. At a time, only one side can tested, user will have to flip the sample and press test button to test side B. results for up to 5 samples – 10 sides (2 sides for each sample) is saved for calculation of Ri.

The instrument can store results for up to five laminations before clearing the measurement table.

Yes. Test results can be printed directly over USB or Wi-Fi or exported to a USB drive for documentation and record keeping.

The recommended specimen size is 115 mm × 280 mm, although other sizes within the specified range can also be tested.

Yes. The instrument uses a pneumatic system to apply controlled pressure during testing.

Instrument verification is performed using a copper plate. If the measured current exceeds 0.97 A, the instrument is considered to be operating correctly.

What is the EP400 Epstein Tester used for?

The EP400 measures the AC magnetic properties of flat-rolled electrical steel, including iron loss, magnetizing force, permeability, and power consumption.

The EP400 is designed according to ASTM A343, IEC 60404-2, and BIS 649 standards.

The EP400 measures iron loss (W/kg), VA/kg, magnetizing force (AT/m), permeability, power factor, RMS voltage, RMS current, peak current, and magnetic flux.

The EP400 is suitable for testing CRGO, CRNO, and other flat-rolled magnetic materials in both as-sheared and stress-relieved conditions.

The built-in crystal-controlled sine wave generator supports frequencies from 35 Hz to 200 Hz.

The Epstein method provides highly accurate and standardized magnetic property measurements and is widely accepted by manufacturers, laboratories, and research institutions.

Yes. The EP400 can perform complete testing directly from the front panel in Epstein Bridge Mode without requiring a computer.

Yes. The EP400 includes USB connectivity and Gopal Magnetic Tester software for automated testing, report generation, and PDF export.

The recommended specimen size is 30 mm wide and 305 mm long, arranged in an Epstein Bridge according to international standards.

Demagnetizing removes residual magnetism from previous handling or testing, ensuring accurate and repeatable magnetic property measurements.

Yes. User Mode allows engineers and researchers to perform custom magnetic measurements on transformers, EI cores, toroidal cores, and other magnetic components.

The software generates comprehensive PDF reports including iron loss, VA/kg, magnetizing force, permeability, hysteresis curves, and other magnetic characteristics for analysis and documentation.

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