6 Use a soft cloth to wipe off the dirt on the case. The case of Gasmet is not
waterproof. Do not apply running water when cleaning the case. Do not use strong
detergents or acetone. If the instrument is used in dusty conditions, it is
recommended to vacuum clean the dust filters (and replace if necessary) at
least once a month. The filters are located on the front and back panels of the
instrument.