Maintenance

If treated and used correctly, the device will not require maintenance. To clean use only a cloth dampened with a gentle alcohol (e.g. ethyl alcohol).
Do not use aggressive cleaning agents and solvents such as chlorethene or trichloroethylene. No components relevant to long-term accuracy are subject to loading if the device is used correctly.
Consequently long-term drift is extremely low. Therefore the device cannot be adjusted. Thus any compensating is not possible.
During repair, the constructive characteristics of the device must not be changed. Replacement parts must correspond to the original spare parts and must be used in accordance with the fabrication version.