Tenders Are Invited For Magnetic Meters – Delivery And Installation Of A Vibrating Magnetometer (Vsm) For Th ... in Bulgaria

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Magnetic Meters – Delivery And Installation Of A Vibrating Magnetometer (Vsm) For The Needs Of Contract Kp-06-Н97/5, Nis At Tu-Sofia. The Order Includes Delivery And Installation Of 1 Vibrating Magnetometer (Vsm) For The Needs Of Contract Kp-06-Н97/5, Nis At Tu-Sofia. Minimum Requirements And Technical Indicators: 1. Functional Requirements And Modes Of Work • 1.1. Scope Of Magnetic Research O Automatic Measurement And Recording Of Basic Magnetic Properties Of Magnetic Materials: Magnetic Hysteresis, Magnetization Curves, Demagnetization, As Well As Temperature Dependences (Heating/Cooling Curves And Temperature Variation Over Time), Magnetic Saturation And Residual Magnetization, Coercive Intensity, Magnetic Energy Maximum, Curie Temperature And Magnetic Conductivity. • 1.2. Compatibility With Different Sample Shapes O The Design Must Allow Precise Measurement Of Magnetic Materials In The Form Of Powders, Fine Particles, Thin Films, Liquids And Massive (Solid) Bodies. • 1.3. Computer Control O The System Shall Support Fully Automated Measurement Mode Controlled By Computer. O The Software Must Provide Automatic Locking And Phase Reset Of The Systems Immediately After Online Mode Activation. • 1.4. Autonomous Manual Mode O Ability To Switch To Fully Manual Mode Where Computer Control Is Disabled. O Modulation To Zero, Phase Shift, Time Constant And Sensitivity Should Be Controlled Directly From The Control Panel Buttons. 2. Metrological And Technical Characteristics • 2.1. Magnetic Moment Range O Measuring Range Of Magnetic Moment From A Minimum Of 10⁻² Emu To A Maximum Of Not Less Than 300 Emu (At Interpole Distance Up To 35 Mm). • 2.2. Measurement Sensitivity O Minimum Technical Sensitivity When Measuring The Magnetic Moment: 5 × 10⁻⁵ Emu Or Better (Lower Numerical Value). • 2.3. Accuracy And Repeatability Of Measurements O Relative Accuracy Of Measurements: Better Than ±1% (Lower Numerical Value) (At Reference Value 30 Emu). O Repeatability Of Results In Consecutive Tests: Better Than ±1% (Lower Numerical Value Is Better) (At Reference Value 30 Emu). • 2.4. Temporal Stability O System Stability During Continuous Operation Within 24 Hours: Better Than ±1% (Lower Numerical Value). 3. Electromagnetic System And Power Supply • 3.1. Electromagnet And Field Induction O Field Source – Electromagnet With Adjustable Induction In The Center From A Minimum Of 0 T To A Maximum Of Not Less Than 1.3 T (At A Fixed Air Gap Between The Poles Of 20 Mm). O Diameter Of The Front Surface Of The Magnetic Poles: Minimum 60 Mm. • 3.2. Solenoid Cooling O Solenoid Construction Ensuring Operation Through A System With Natural Air Cooling Or Through An Equivalent /More Efficient Technological Solution/. • 3.3. Power Source Stability O Direct Current Power Supply Unit (Dc Power) With Automatic Conversion And Power Range From 2 To 30Kw O Output Current Stability: Better Than 5 × 10⁻⁴ A. • 3.4. Built-In Power Protections

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