Bartington Mag628 Operation Manual

Contents

Bartington Mag628 Operation Manual Manual pdf 9 page image

BARTINGTON INSTRUMENTSPage 9 of 13 OM2808/34.5. Post Installation TestingWhen the sensor and electronics are installed and power is applied, the following checks can bemade:1. The ‘test’ output (Mag628 and Mag669: PL1 pin 9) is open circuit (normally pulled to apositive voltage by a resistor).2. Each of the analogue outputs will register a voltage equivalent to the earth’s magneticfield. The level on each channel will vary depending on sensor head orientation betweenequal positive and negative maximum values of approximately 6V corresponding to typicalearth field.5. Using the Mag628, Mag629 and Mag6695.1. OperationThe sensor functions immediately after power is supplied, providing an analogue voltage on eachof three channels in response to the applied magnetic field.5.2. Magnetic HysteresisThe Mag628, Mag629 and Mag669 are designed to have an extremely low magnetic hysteresis.However, Bartington Instruments recommends your magnetometer is not subjected to magneticfields greater than their stated measuring range for extended periods as this could alter the DCoffset. If this occurs, the offset will exhibit drift as it returns to its original offset specification.Caution: Subjecting the magnetometer to fields in excess of 2 x the nominal range maycause inaccuracy in future measurements. Degaussing the magnetometer can reversesuch an effect.5.3. Environmental PrecautionsRefer to the product brochure for maximum environmental electrical and mechanical ratings.Caution: Exceeding the maximum environmental ratings may cause irreparable damage toyour sensor.