You fail to challenge the analytical balances for minimum weight, measurement for uncertainty, and drift value.

To design and manufacture a constant-source with adjustable amplitude value and the test system, and to realize the examination of zener diode voltage drift parameter, is very important.

As a consequence of the drift of inclinometer's mechanicalness and electrical circuit during the long-dated observation, the lattice value of the inclinometer's record trunk must be calibrated termly.