The observations reported here were made at the Llano del Hato Observatory of the Center of Investigation in Astronomy (CIDA) at Merida (Venezuela) during a run in February 1996.
The instrument used was a Zeiss refractor (aperture 65 cm, focal lenght 10.6 m) equipped with a wire micrometer. Since the last run of visual double stars with this instrument (Valbousquet 1980) some changes were required at the micrometer, fited up a new micrometer screw with angular equivalent of the pitch of 0''0197 per division. We obtain this value with diferent forms of calibration.
In this first run in Llano del Hato has been proved that this instrument is a very useful instrument for the observation of double stars. It's optics and mechanical parts are both excellent.
In general visual conditions were very favourables and the seeing was between 0''5 and 2''0 even sometimes was around 0''35.