75MAINTENANCEMaintenance is basically confined to cleaning the outside of the device.DEVICE CALIBRATIONThe calibration interval is dependent on use and operational demands, and should be between 1 and2 years. Calibration can be carried out by Kathrein customer service. For address see next page.OUTSIDE CLEANINGA soft cloth, lint-free duster or paint brush is recommended for cleaning the outside of the device. In caseof heavier soiling it is also possible to use alcohol or a mild soap solution. Under no circumstances isit allowed to use solvents such as thinners, acetone, etc., as otherwise plastic parts and markingsmay be damaged.INTERIOR CLEANINGImportant!As it is necessary to open the device to clean the interior, this work should only be undertaken byauthorised service personnel! The device should be dust-cleaned inside at regular intervals, approx.every one to two years, to ensure optimum ventilation. The cleaning interval will vary according to thelength of time the device is operated each day and the dust levels in the premises. It is necessary toremove the back panel or the control panel for cleaning. Dust deposits can be removed using a brush orgrease-free compressed air.FUNCTION TESTIt is advisable to check the specified nominal data at appropriate intervals. The data and tolerances aregiven in the technical data sheet.REQUIRED MEASURING EQUIPMENT- TV/SAT signal generator for checking the level accuracy as well the analogue measurements anddemodulation.- DVB signal generator for checking the level accuracy as well the digital measurements anddemodulation.CHANGING THE BATTERY• Unscrew the handle• Remove the plastic bottom shell• Remove metal battery cover at bottom of device• Take out battery• Disconnect battery• Insert the new battery, connect it and reassemble the device inthe reverse order• Follow battery disposal instructions on page 2.STORAGEThe storage temperature range of the device is -20 °C ... +85 °C.The device must be protected against dust and moisture during storage.
