BARTINGTON INSTRUMENTS
Page 8 of 11 OM2298/3
5. Using the Mag648 and Mag649
5.1. Magnetic Hysteresis
Both the Mag648 and Mag649 are designed to have an extremely low magnetic hysteresis.
However, Bartington Instruments recommends your magnetometer is not subjected to magnetic
fields greater than their stated measuring range for extended periods as this could alter the DC
offset. 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 may
cause inaccuracy in future measurements. Degaussing the magnetometer can reverse
such an effect.
5.2. Environmental Precautions
Refer to the product brochure for maximum environmental electrical and mechanical ratings.
Caution:
Exceeding the maximum environmental ratings may cause irreparable damage to
your sensor.
6. Troubleshooting
The sensor is unlikely to suffer any defects in normal use: no internal components are
serviceable. The most likely causes of failure, and their solutions, are detailed in the following
table.
In the event of any apparent malfunction beyond those described in the table below, please email
, or telephone the Bartington Instruments service team on +44 (0)1993
706565.
Causes of failure
Solution
Power supply
Check the power supply as detailed in
Pre-
Installation Tests
.
Cables
Check the cables as detailed in
Pre-
Installation Tests
. In some cases damaged
connectors can be replaced. Contact the
Bartington Instruments helpdesk for further
advice.
