BARTINGTON INSTRUMENTS
Page 15 of 20 OM0382/9
6. Operating Instructions
Refer to figures 1, 4 and 5.
6.1. Switching On
Connect the probe selected to the probe socket and switch on the magnetometer.
Note:
The plug locking mechanism requires that the outer shell of the plug is retracted
(towards cable) during insertion and removal.
For the first 2-5 seconds following switch-on, the battery voltage will be displayed on the LCD.
Note:
If the battery voltage is below 5V then the instrument must be put on charge
immediately. An audible alarm will also signal when the battery requires recharging. The
instrument should never be left in a discharged state as the capacity of the battery will be
adversely affected.
Some increase in noise can be expected during the first few minutes of charging. The charging
circuit is temperature compensated and the instrument may be left on charge indefinitely
without harm to the battery.
The optimum stability of the magnetometer will be achieved in approximately 10 seconds
following switch-on. Check that the instrument is working by subjecting the probe to a slowly
varying magnetic field. This is best done for a free probe by rotating it in the earth’s magnetic
field and observing the change in values. The geomagnetic field will be between 30
m
T and 90
m
T.
6.2. Magnetic Hygiene
Any object that is magnetic, or has a high magnetic susceptibility, may cause a change in
the surrounding magnetic field and therefore to the field measured by the Mag-01H. Ensure
that the operator and the surrounding environment are magnetically clean when perfoming
measurements.
Caution:
Avoid any exposure of the probes to very high fields. (Fields up to 1T have been
shown to cause no permanent damage or impaired performance.) The instrument will fully
recover from severe overload in around 5 seconds.
6.3. Using the Offset Control (Mag-01H only)
To obtain the maximum resolution on the autoranging LCD, the bipolar offset control can be
used to add a positive or negative offset to the field strength experienced by the probe.
Example:
if F=90.00
μ
T and offset is set to -80, then the display will then show +10.00.
