Zeiss automatic level ni 42 operating instructions. Available to purchase for immediate download. Below is an extract from the manual converted to text for a quick impression on the content. Zeiss automatic level ni 42 operating instructionsAutomatic Ievel Ni 42NI 42 Our best wishes accompany you for your work with the automatic Ni42 level. The instrument is de- signed to give rapid and reliable results. Like any technical product, the M42 requires a certain amount of care which is described in the following instructions. Also, an occasional checkup may become necessary. Since this is so easy, you will probably want to do it yourself. Please note: Before making any observation. allow the instrument to adopt the outside temperature.