Cable control systems are widely used in GA aircrafts and gliders. The paper deals with the accuracy of measurement the tension of cables on the production stage and maintenance of aeronautical products. Producers of measuring instruments used to measure tension don’t explicitly define how to calibrate them and stipulate to use special methods and stands. The paper discusses the possible method of tension measurement, measuring tools, methods of calibration and possible errors the adopted measurement and calibration methods as well. The possible error analysis to take into consideration, the stands construction and details: measuring instruments system, temperature influence length of reference cable etc.