When servicing a servomotor, the rotation angle of the resolver has to be adjusted correctly. The adjustment with help of a servo drive is very time consuming. Alternative devices are expensive and work only with servomotors of specific manufacturers. A test site and a portable device for resolver adjustment are designed in the scope of this Master's thesis. Some possible solutions are introduced and a final solution is justified. The development of the prototype is documented and its evaluation is given. After a test run, possible faults are analyzed and solutions are suggested.