An autonomous microprocessor-controlled instrument measures magnetic i
nduction components along three coordinate axes and determines the com
posite induction value. The maximal measured values in two subranges a
re 4.095 and 8.191 T. The temperature drift is less than or equal to 1
0(-4)/K. The offset voltage of the base line and the current flowing t
hrough Hall sensors are measured as well. This current has a temperatu
re instability no larger than 3 x 10(-5)/K.