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Computerized Testing For Electrical Steels

A computer controlled system that performs standard Epstein tests for production or research use. The standard system can test either oriented or non-oriented steels, with many options available for customization suited to your specific needs. Tests start automatically after all data has been entered and test data is printed and saved at the end of test.

Description

The Model 3110-MS2 is a computer controlled precision Epstein system designed to provide accurate results conforming to the latest ASTM specifications. Testing is automatic once the menu data is entered (except for sample loading and unloading and weighing the sample) and results are printed and also saved to disk. This data can later be recalled for screen viewing or used with customer or optional programs for consolidation or statistical summaries. Instrumentation and circuitry is state of the art, solid state modules and components designed for long, trouble-free operation. Circuitry meets or exceeds the applicable ASTM Standard for the tests provided. The power source for driving the test fixture is a high quality laboratory linear amplifier driven by a precise power line sinewave for power line frequency testing. The majority of the remaining circuitry is interface modules to input or output voltages and results to and from the computer. The computer controls the testing. It inputs the sample parameters, controls the test stimulations, reads the results, performs the needed computations, and presents the test data as a printed record. The standard Epstein core loss test program provides specific core loss, specific Volt - Amps, and peak perm. Testing is at 50 or 60 hz only. The program will test both regular grain oriented and high permeability grain oriented steels. Data is reported in either customary units or SI units (not both). The program includes automatic test number incrementing. Menu driven prompts present default data chosen for the application to lead the operator through data entry or changes. The menu is arranged to minimize operator entries. Operator Entry of up to eight alpha-numeric identification entries such as operator number, customer or supplier number, coil or batch ID, etc., is provided. Each of these entries can be up to 20 printable characters long. These items would be chosen and specified at the time of an order, and would be printed as entered with each test result. An internal set of standard resistors permits easy checking of instrumentation operation. These resistors are used with Calibration Maintenance Program which can be run daily by the operator to assure that the instrumentation is staying within calibration. If the test results are not satisfactory, then operator can inform a supervisor, and the proper maintenance personnel can be brought in to make the adjustments as needed. The Calibration Maintenance Program provides screen instructions for the step-by-step calibration of the system to an external high quality digital meter. The meter is used to adjust the internal DC and Average AC Voltages for proper operation using the internal resistors. Included in the standard system is one Model 2600, 700 Turn, 25 em, Epstein Frame. This fixture comes complete with the proper program and cable. The frames are plug-in.


 

Specifications

Power Source

Output Voltage 0-60 Volts
Output Frquency Power Line Frequency (50 or 60Hz)
Output Power 1000 VA
Input Power Approximately 3 KVA

 

Sample

Standard Epstein (700 Turn Frame)
Weight 300 to 1600 g (Epstein, 700 Turn Frame)
Density 7.55 to 7.85 g/cm^3 (Nominal)

 

Minimum Full Scale Ranges

Volts 1 Volts Full Scale
Current 0.1 Amps Full Scale
Power 0.1 Watts Full Scale (net)

 

Ranges

(approx - based on samples of nominal weight and quality)
Induction 5.0 to 20 kilogauss
Peak Magnetizing Force 0 to 150 oe (0 to 12,000 A/m)
Core Loss 0.01 to 50 watts (net)

 

Measurement Accuracy

Meets or exceeds ASTM specifications A343

 

Measures

  • Core Loss-Net Watts, Watts/Pound or Watts/Kilo
  • Induction in Tesla
  • Flux Volts
  • Rms Amps
  • Rms Volts
  • Peak Magnetizing Force, Hp (Oersteds) or Hp (A/m)
  • Volts Amperes-Volt Amperes/Pound or VA/Kilo
  • Peak Permeability, µp
  • Rms Permeability, µz (Option)
  • Rms Magnetizing Force, Hz (Option)

Mechanical

(approx - based on samples of nominal weight and quality)
Desk (Three bay unit on wheels)

78"x33"x29 1/2" (198x83.82x74.93 cm)

(LxWxH)
Weight (Desk only) 275 lb. (124.738 kg)
Weight (Desk with all parts included) 630 lb. (285.763 kg)
Optional - Single electronic rack

24"x31"40" (24x78.7x101.6 cm)

(WxDxH)

Weight (Rack only, approximate) 175 lb. (79.38 kg)
Weight (Rack with all parts included) 530 lb. (240.40 kg)

 

Options

  • 03- One Additonal 700 turn frame and program for alternate frame testing
  • 04- Calibration Meter - Average Reading and True RMS
  • 05- Digital scale
  • 06- Internal 700 turn, 25 cm frame
  • 07- Calibration Maintenance Program
  • 08- Small single sheet fixture contstant correlation
    • 08a-Each Constant
  • 09- AC magnetization curve (B vs H) program- 30 Point
    • 09a- Add W/lb and/or VA/lb
  • 10- Ring Sample Testing Program
    • 10a-Ring Fixture
  • 12- Spare computer with interface, tested with system
  • 13- Electronic Line Conditioner (approx. 3 KVA)
  • 14- Program to save selected data in ASCII format
  • 15-Generator chassis with line frequency card and program
    • 15a1-15a10Cards: 50, 60, 100, 200, 400, 500, 800, 1000, 2000, and 4000 Hz
  • 16- 500 x 500 mm, wide sheet fixture with cable and program
  • 17- Add testing of both oriented and non-oriented steel
  • 18- Provide AC permeablilty
  • 19- Provide apparent AC magnetizing force
  • 21- Set to H program
  • 22- 352 Turn frame with program
  • 23-Hardware and software to allow testing with feedback to correct secondary voltage waveform