Page 7 of 12 OM3143/3
9. Operation
9.1. Connector Pin Allocation
The connector pin or cable colour allocation for the connection to each package type is shown on
the appropriate outline drawing on the Mag-13 product page.
9.2. Interface
The analogue outputs for the X, Y and Z axes are buffered to give a low output impedance,
enabling the unit to be operated over long cables and interfaced with high impedance data
acquisition systems.
9.3. Power Supplies
The normal power supply of the sensors is specified in the product brochure. The ideal power
supply units are those referenced in Compatible Power Supply and Data Acquisition Units.
Alternatively, users may wish to provide their own supply. This should provide a voltage within the
specification found in the product brochure. For the low noise applications, any ripple in the power
supply should not exceed a few mV.
Note: Adequate performance of the sensor cannot be guaranteed if used with non-
Bartington Instruments products. Bartington Instruments cannot advise on the operation of
third party products.
See the product brochure for nominal current requirements. There is an additional current in
proportion to the measured field, which is drawn from the positive or negative supply depending
on the direction of the field.
9.4. Signal/Power Ground
Note: The two signal/power ground conductors are connected to a common point within the
sensor and the power supply common (power 0V) should be connected to only one of them.
The other signal/power ground conductor should be used as the signal output common (0V).
Each signal is then measured between the signal output conductor and the signal output
common. In this way, the signal output common carries no power supply currents.
Note: In long cables, the minimum current in the power ground conductor will give rise to an
appreciable potential difference between the power supply end and the sensor end of the power
ground conductor. The use of separate power and signal ground conductors will ensure that
this voltage is not included in the voltage measured between the signal output and the signal
common.
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