VSM Vibrating Sample Magnetometer

Technical Indicators:

1. Measurement range of magnetic moment (when the magnetic pole spacing is 30mm): 1*10-3emu—300emu (sensitivity: 5×10-5emu)

2. Relative accuracy (when the range is 30emu): better than ±1%

3. Repeatability (when the range is 30emu): better than ±1%

4. Stability (when the range is 30emu): work better than 1% for 4 consecutive hours

5. Temperature range: room temperature to 500 degrees Celsius and room temperature to liquid nitrogen temperature zone

6. Magnetic field strength: between 0—±3.8T

Electromagnet DC Steady Current Power Supply:

※ Bipolar constant current output

① The output current of the power supply can be continuously changed between positive and negative rated high currents

② The current can smoothly cross the zero point, non-switching commutation

③ Four-quadrant operation of output current and voltage (suitable for inductive loads)

④ The current change rate can be set in the range of 0.0007～0.3 F.S./s (F.S. is the rated output maximum current)

※ High current stability and low ripple

① Current stability: better than ±25ppm/h (standard type); better than ±5ppm/h (high stability type) ② Current accuracy: ±(0.01% set value + 1mA) ③ Current resolution: 20 bit, Example 15A power supply, current resolution is 0.03mA

④ Source effect: ≤ 2.0×10-5 F.S. (when the supply voltage changes by 10%, the output current changes)

⑤ Load effect: ≤ 2.0×10-5 F.S. (when the load changes by 10%, the output current changes)

⑥ Current ripple (RMS): less than 1mA

※ Two output modes

① Current mode: directly set the current in the magnet or coil

② Magnetic field mode: directly set the size of the magnetic field in the magnet or coil

Note: The magnetic field mode needs to cooperate with the company's high-precision gauss meter and probe

※ Two operation modes

① Local control adopts high-definition touch screen display and operation

② Remote can be controlled by computer through RS232 interface, RS485, LAN optional

※ A variety of protection functions

①Input power failure protection (when the input power fails, the internal protection absorbs the reverse energy of the inductive load)

②Overcurrent protection (automatic drop current, uncontrollable overcurrent will turn off the power output and alarm)

③Overheating protection (module overheating, power off output and alarm)

④Water flow protection (detect the cooling water, once the water flow is too small or the water is cut off, turn off the power output and alarm. Applicable to water-cooled power supply)

⑤Condensation protection (detects whether there is condensed water on the cooling pipe, once dew condensation, turn off the power output and alarm. Applicable to water-cooled power supply)

⑥ External interlock protection (normally open or normally closed input)

Vibration system:

Includes vibrating rod, mechanical vibrating head holder, sample chamber and detection coil.

Magnetic moment measuring unit:

Magnetic moment range is divided into 300emu, 150emu, 80emu, 40emu, 30emu, 15emu, 8emu, 4emu, 3emu, 1.5emu, 800memu, 400memu, 300memu, 150memu, 80memu, 40memu, 30memu and 15memu (ie 0.015emu), a total of 18 levels, the sensitivity Better than 5×10-5emu; when the magnetic moment range is 30emu, the relative accuracy and repeatability of the measured magnetic moment are better than ±1%, and the stability of preheating for 24 hours and continuous 24-hour work is better than 1%.

The magnetic field range is 3.8T—0—3.8T continuous measurement, the resolution is 0.1mT, and the relative accuracy is better than ±1%.

The output frequency of the vibration source is 180Hz, the frequency stability is better than 10-5, and the output power is greater than 50W.

High temperature furnace and temperature control device:

Heating power 500W, furnace temperature range: room temperature - 1000 ℃;

Resolution 0.1℃

Cryogenic device:

Temperature variation range of sample chamber: 80-500K optional, resolution 0.1K.

Measurement system software:

*The system parameters can be set directly, and the data can be displayed visually

*The suffix of the original data file is 13D, which is directly stored in the computer, which is convenient for subsequent processing. Excel and Origin can be used to process the data directly;

*The various curves and characteristic parameters measured can be displayed on the computer screen. The software can arbitrarily select the data, partially zoom in, translate, smooth the curve, and output and print on a laser printer; it can also be used by other general-purpose processed on the drawing software.

* It can automatically measure the magnetization curve, hysteresis loop, fast MH loop, heating curve, cooling curve, heating and cooling curve, temperature control curve, magnetization curve at set temperature, hysteresis loop, fast MH loop, and Background curve; Under the condition of known demagnetization factor and sample density, the open-circuit sample magnetic characteristic curve of VSM can be automatically converted into the magnetic measurement curve of the substance itself (ie closed-circuit sample)

*The software can simultaneously calculate the curve parameters in SI and Gaussian units (saturation magnetic moment/saturation magnetization/specific saturation magnetization, residual magnetic moment/residual magnetization, coercivity, intrinsic coercivity, square coefficient , positive maximum value of magnetic energy, loop area, Curie temperature)