A method and apparatus for regulating the vacuum supply to calibration
tools which include at least one dry calibration tool and at least one
calibration bath, wherein at least one vacuum pump is brought into
contact with a calibration tool in order to extract air from the
calibration tool, the pressure in the tool being regulated to a target
value by means of a control valve. Several vacuum pumps extract air from
a common pressurized container, and the air is extracted from at least
one dry calibration tool by a first control valve in the common
pressurized container and in addition the air is extracted from at least
one calibration bath by a second control valve in the common pressurized
container.