Instrument

With the arrival of the new Y and Z filters (see below) it was needed to warm-up and open the instrument. The opportunity was taken to check the bearings of the various wheels, which were all found to be working smoothly, and a new PROM containing the low level program that controls the instruments focus mechanism was installed to solve a problem in which the focus mechanism would not always initialise properly. It is foreseen that as part of our preventive maintenance the bearings of the different wheels will have to be replaced within the coming 12 months.