Independent Elements, Flying Leads And Two-Part Construction Sensors; Connecting Power; Electromagnetic Compatibility - Bartington Mag-03 Operation Manual

E. Any data acquisition system analogue inputs should ideally have a very high input impedance,
but satisfactory performance can be obtained with impedances down to 50kW. Impedances
below this should be avoided, particularly where very long cables are used.
F. When using the low noise unit, to obtain optimum performance, additional care should be
exercised to avoid ground currents in the signal leads.
Note: When using a compatible power supply unit from Bartington Instruments, the above
requirements will be met without further consideration by the user.

10.5. Independent Elements, Flying Leads and Two-Part Construction Sensors

Note: On flying lead versions, leads are susceptible to EM interference and should be
screened wherever possible. This may also apply to the leads between the electronics and
sensor head for the Mag-03MCTP, Mag-03MCUP, Mag-03IE, Mag-03IEv1, Mag-03IEv2 and
Mag-03IEHV sensors.

10.6. Connecting Power

Caution: Check that the polarity of the supply is correct. Using the power supply provided
by Bartington Instruments will guarantee that the polarity is correct, as it is impossible to
connect the wrong way round.
Caution: The power supply should be connected to the sensor before the supply is
energised, as this prevents high surge currents which could cause damage. Apply the
positive and negative supplies simultaneously and avoid leaving the sensor connected to one
polarity only.

10.7. Electromagnetic Compatibility

Except for the Mag-03MCT, the Mag-03 range of sensors are not shielded for immunity from, or
emission of, electromagnetic fields. Any shield placed around the sensor will limit the bandwidth
of the sensor response. Emissions are at the frequency of the energising field of the sensor. The
sensor is required to respond to magnetic fields within the specified frequency band.
Caution: Do not operate the sensor in very strong electromagnetic fields as it may develop a
permanent offset, or damage could occur to the sensing coils.
Note: Do not place the sensor near to any equipment which may be affected by the very
small local field produced by the sensor excitation.
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