NO.

Name

Function

Helmholtz coils

The magnetic field of ± (0.1MT ~ 100mT) can be generated by DC standard current source excitation.

Computer and Software

Realize semi-automatic or fully automatic calibration, data recording, report generation.

Printer

Print the resulting calibration report.

Precision magnetometer

Can be used as a standard meter to calibrate the magnetic field of an electromagnet.

Calibrated magnetometer

The position of the DUT.

Electromagnet

The magnetic field of ± (10mT ~ 2.5T) can be generated by DC standard current source excitation.

Workbench

Placing equipment, proofread table, computer, printer, etc.

Measurement and control platform

Manual control of excitation current or magnetic field output.

Power switch

The green button is on, and the red button is off.

DCI standard source

Produces high precision DC current for electromagnet or Helmholtz coil excitation.

Probe position controller

Each stepper motor with 13 RS232 interfaces is connected to the probe positioning device.

• High-precision bipolar current standard source, which can output dual DC current to excite the magnetic field coil and the electromagnet respectively. Accuracy is up to Class 0.01.

• Output stability is better than 30 ppm/min, annual error variation is better than 50 ppm.

• The current source can be continuously tunable by program control and has a small adjustment fineness, which facilitates the calibration of pointer magnetometer.

• Large power output and it can drive a magnetic field coil or electromagnet for a long time at full load.

Specifications

Dual current range

50 mA, 200 mA, 1 A, 5 A, 20 A

Output range

± 5 mA～± 24 A

Adjustment fineness

5 ppm*RG

Short term stability

30 ppm/min

Accuracy

0.006%+ 0.004%

± (ppm of reading + ppm of range) [1]

Full scale linearity

< 10 pp

Annual error variation

< 50 ppm

Maximum load voltage

80 V

Protection function

Open circuit protection, overload protection function

Power supply

AC ( 220 ± 22 )V, ( 50 ± 2 )Hz, Max. power comsumption: < 2 kVA

Note [1] : (ppm = parts per million) (e.g., 10ppm = 0.001%).

☆ TM9000-HC Standard Magnetic Field with Helmholtz Coil

• A standard magnetic field of ±(0.1 mT ~ 100 mT) can be generated by excitation with a high-precision DC standard current source.

• Calibration of a DC magnetometer with a radial or axial probe.

• The stability and accuracy of a magnetic field depends entirely on the excitation current, and can be directly regarded as a standard magnetic field.

• Two sets of probe position intelligent adjustment devices are installed on the coil, which drive the probe to move and rotate in the Y/Z axis by a precision stepper motor, and determine the best test point by intelligent adjustment and positioning by software.

• The coil is not only suitable for DC magnetometer calibration, but also suitable for various research institutes, colleges, enterprises to conduct electromagnetic interference simulation experiments, material magnetic detection experiments, etc., which is widely used.

Specifications

Field current

± ( 5 mA～20 A )

Scope

± ( 0.1 mT～100 mT )

Uniformity

The uniform field within 20 mm is better than 300 ppm

Linearity

The magnetic field is proportional to the excitation current

The temperature influence

The coil constant K changes little with temperature

Inner hole diameter

200 mm

Size

680 mm×700 mm × 450 mm (W x D x H)

Weight

About 120 kg

• The electromagnet can be excited by a high-precision DC standard current source to generate a stable magnetic field of ± (10 mT ~ 2.5T).

• The reference value is measured by a standard table.

• There is a good linear relationship between the magnetic field and the current, and the stability of the magnetic field depends on the excitation current.

• The TM6140B precision magnetometer (0.05 ) is used as the standard meter.

• Equipped with two sets of probe position intelligent adjustment device, the probe is driven to move and rotate in the Y/Z axis by a precision stepper motor, and the optimal test point is determined by intelligent adjustment and positioning of software.

• The electromagnet base is equipped with rollers on each of its four legs.

• The electromagnet has a small input power/magnetic field ratio and can work stably for a long time without water cooling and heat dissipation.

Specifications

Field current

± ( 5 mA～24 A )

Scope

± ( 10 mT～2.5 T )

Uniformity

The uniform field within 5 mm is better than 300 ppm

A column diameter

180 mm

Polar surface diameter

60 mm

Air gap

10 mm

Size

710 mm × 885 mm × 560 mm (W x D x H)

Weight

About 500 kg

☆ TM6140B Precision Magnetometer

• Equipped with high-sensitivity, low-drift Hall sensors and applied advanced digital signal processing techniques.

• DC magnetic field is measured from 0 to 3000 mT, accuracy 0.05 %.

• As a standard meter for a magnetometer calibration device, calibrating DC magnetometer.

Range

Resolution

Accuracy

±(A ppm of reading + B)

The temperature coefficient

±ppm/℃

Zero drift

± μT/h

3 mT

1 nT

0.1% + 100 μT

50

15

30 mT

10 nT

0.05% + 100 μT

50

20

300 mT

100 nT

0.05% + 100 μT

50

50

3000 mT

1 μT

0.05% + 150 μT

50

75

• The shielding frame is made of a shielding material with high magnetic conductivity, which removes the effects of the geomagnetic field.

• The internal magnetic field <10-6 T, which can be directly regarded as zero magnetism when calibrated.

• Small, lightweight (about 1kg), compact and easy to carry.

• The device is suitable for calibrating the zero point of a standard or calibrated magnetometer.

• The device has 13 RS232 interfaces, 12 of which are used to control a total of 12 precision stepper motors on four probe positioning systems (two for each field coil and two for the electromagnet).

• The other RS232 is used for computer communication, controlling the stepper motor by software or wireless mouse remote control, driving the Hall probe to move or rotate at Y/Z axis and W Angle to determine the best magnetic field test point.

• The four sets of probe position intelligent adjustment devices are made of non-magnetic materials.

Axis

Range of stroke/Angle

Adjustment fineness

Y

50 mm

0.1 mm

Z

60 mm

0.1 mm

W

± 12°

0.1°

• The software automatically recognizes whether an accessory is communicating properly with the PC, and visually displays in the configuration interface.

• The selected excitation mechanism is visually displayed in the interface of the software and can be freely switched.

• The calibration parameter units: mT, G, kG, Oe, kOe, A/m, kA/m.

• The software controls the Y axis, Z axis, and W axis of the standard probe and the probe to adjust the best test point of the probe, or enter the wireless mouse control mode.

• Automatically prompts you to switch between the range and the calibrated value of the input, and automatically enters the standby state if no input is entered within 2 minutes.

• Automatically calculates zero drift, which exceeds the permissible zero drift and is marked in red.

• An error is automatically calculated and compared to the permissible error, warning you with a red light for an excess value.

• Test data can be generated and exported as a calibration report.