Bartington Helmholtz Coil Installation And Calibration Download Page 14 | Manualshive

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Bartington Helmholtz Coil Installation And Calibration Download Page 14

HELMHOLTZ COIL INSTALLATION AND CALIBRATION

Figure 7: Position 0 - XYZ Sensor Match XYZ Coil

With the sensor in position 0, select the X axis and record the two values given in the alignment

section of the software. These will be angular errors for Y and Z and will be called Yx and Zx (Y error due
to X and Z error due to X).

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Summary of Contents for Helmholtz Coil

Page 1: ...e coils the system should be installed in an area clear from permanent fixed ferromagnetic structures such as support beams reinforced concrete or steel shelving as these will distort the local magnet...

Page 2: ...ed up or down so that the point where the reference magnetometer is located read 0 or whatever value field is applied to the coils Typically this will mean having a clearance of a few meters also coil...

Page 3: ...ces 4 Assembly and Orientation The HC1 HC9 and HC16 come pre assembled Only the HC2 requires assembly on site in addition to the 2m Ferronato coil Assembly instructions for the HC2 can be found in the...

Page 4: ...the Mag 13MS mounting jig can be placed within the coils using the necessary support pillars table provided coil dependent The jig should be mounted so that the sensor s Z axis along the length of the...

Page 5: ...MS in the centre of the coil using the provided mounting jig Opening the Bartington Helmholtz Coil Control Software set the coil to the correct type Generator tab settings should be set to o Set the f...

Page 6: ...e field amplitude reading ensure that you are selecting the correct measuring range for the sensor On the Mag 13 the number that follows is the full range of the sensor and corresponds to 10V The aim...

Page 7: ...the offset checks return to the generator tab The settings should be as follow o Set the amplitude to of the sensor range or the maximum field which can be generated by the coils whichever is the lowe...

Page 8: ...into account the sensor s scaling error In RMS this value will be 70 71067 the field applied in the generator tab or the adjusted value to account for the sensor s scaling error o Set the filter to 1...

Page 9: ...tries in are comments and should not be part of the file o Test Equipment Status tsf Start System Test Equipment HC2 this may change to HC1 HC9 HC16 depending on the coil used System Path C Bartington...

Page 10: ...see table at the end of the file Test Equipment HC2 use the same name as the tef file name and the test equipment entry in the test equipment status tsf file DAC Sample Rate Multiplier 4 000000E 0 De...

Page 11: ...tor Z Coil Trim Factor Max coil field HC1 5 000000E 3 5 000000E 3 5 000000E 3 5 000000E 4 HC2 7 330000E 3 6 740000E 3 7 870000E 3 2 000000E 4 HC9 or HC16 1 410000E 3 1 225000E 3 1 050000E 3 1 000000E...

Page 12: ...7E 6 70E 6 100uT full range 10E 6 100E 6 250uT full range 25E 6 250E 6 500uT full range 50E 6 500E 6 1000uT full range 100E 6 1000E 6 Once the files have been created and are stored at C Bartington t...

Page 13: ...The same procedure will apply for Y and Z As the method is however similar for the other two axes we will only provide photos showing the position of the sensor and the potentiometers which need adjus...

Page 14: ...on 0 XYZ Sensor Match XYZ Coil With the sensor in position 0 select the X axis and record the two values given in the alignment section of the software These will be angular errors for Y and Z and wil...

Page 15: ...HELMHOLTZ COIL INSTALLATION AND CALIBRATION Figure 8 Y and Z errors due to X Next rotate the sensor along its X axis so that is in position 1...

Page 16: ...s calculated using the Y X and Z X potentiometers adjust the potentiometers to the target value Once achieved you can return the sensor to position 0 and check that the value obtained has the same abs...

Page 17: ...d Z errors due to Y Xy Zy Rotate the sensor along the Y axis to end up in position 2 see Figure 12 The errors obtained will be Xy and Zy The target value for Xy and Zy will be calculated as Xy Xy 2 an...

Page 18: ...rs due to Z Xz Yz Rotate the sensor along the Z axis to end up in Position 3 see Figure 14 The errors obtained will be Xz and Yz The target value for Xz and Yz will be calculated as Xz Xz 2 and Yz Yz...

Page 19: ...ft on permanently though not necessarily generating field The system can be checked at regular intervals using the supplied equipment Any changes to the local environment should lead to a check of the...

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