Bartington Helmholtz Coil, Installation And Calibration, Page: 8 / 19

HELMHOLTZ COIL INSTALLATION AND CALIBRATION
Figure 4: Generator Tab - Scaling
In the read tab, the settings should be as follow:
o
Set the reading to RMS or PK-PK whichever is more convenient. For a pk-pk setting, you should
read twice the applied field in the generator tab (or whichever value is adjusted to take into
account the sensor’s scaling error). In RMS, this value will be 70.7 1067 * 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 or 10kHz
o
Start read and check the value for the axis being used. If the value is not that of the target
value, adjust the trim potentiometer which can be found on the PA1 front panel behind a
plexiglass panel. There is one for each axis X trim, Y trim and Z trim (see
Figure 1 ).
Repeat the process for Y and Z.