Abstract: Perfusion systems and procedures for operating perfusion systems that can include a drip container, a drop detector, a perfusion conduit and at least one control valve or a syringe pump. During the procedure, at least one calibration of the measuring process and the storage of at least one calibration value are performed. A control unit regulates the control valve or the syringe pump while using at least one measurement performed by the measuring device and taking into account at least one calibrated value towards the desired flow volume.

Abstract: A portable electronic device comprises a housing and a chemical sensor arranged inside the housing which chemical sensor is adapted to measure a property of at least one analyte. The device further comprises an opening in the housing for exposing the chemical sensor to the fluid to be analyzed.

Abstract: In a portable electronic device, a temperature sensor is provided for sensing an ambient temperature of the portable electronic device. At least one other temperature sensor is provided for sensing a temperature inside the portable electronic device. The portable electronic device further comprises a set of components radiating heat in an active state in response to the consumption of electrical energy. A calibration module is adapted to conduct a calibration measurement during or in connection with an active state of at least a first component out of the set, and is adapted to determine a set of calibration parameters in response to the calibration measurement for adjusting the at least one sensed inside temperature. A compensator is provided for determining a compensated ambient temperature dependent on at least the sensed ambient temperature and the at least one adjusted sensed inside temperature.

Abstract: In a method for operating a portable electronic device comprising a chemical sensor, at least one reference reading is taken by the chemical sensor at least one predetermined point in time. At least one compensation value is determined based on at least one reference value wherein each reference value is derived from a result of a corresponding reference reading. A result of an operational reading of the chemical sensor is modified by the at least one compensation value.

Abstract: In a portable electronic device, a temperature sensor (1) is provided for sensing an ambient temperature (TR) of the portable electronic device. At least one other temperature sensor (3) is provided for sensing a temperature (TI) inside the portable electronic device. The portable electronic device further comprises a set of components (2) radiating heat in an active state in response to the consumption of electrical energy. A calibration module (5) is adapted to conduct a calibration measurement during or in response to an active state of at least a first component out of the set, and is adapted to determine a set of calibration parameters (c1) in response to the calibration measurement for adjusting the at least one sensed inside temperature (T1). A compensator (4) is provided for determining a compensated ambient temperature (TA) dependent on at least the sensed ambient temperature (TS) and the at least one adjusted sensed inside temperature (c1, T1).

Abstract: There is provided a portable electronic device with one or more integrated temperature sensors (12) for measuring an ambient temperature, a compensator (25,26) for reducing the difference between a sensor output (Ts) and the ambient temperature (Ta) with the compensator (25,26) switching depending on environmental and/or handling conditions between a plurality of compensation modes selected dependent on measurements of one or more other integrated and/or external sensors.

Abstract: In a portable electronic device, an ambient temperature is sensed by means of a temperature sensor. In addition, it is assessed if the portable electronic device is exposed to condensation. A corresponding condensation indicator is provided. The condensation indicator is determined based on a dew point and based on sensed temperature values of the past or temperature derived from the past sensed temperature values.

Abstract: A concentration of a compound in a gas is determined by a gas sensor with a layer comprising metal oxide. The layer is heated by first heating pulses of a first duration each, and by at least one second heating pulse of a second duration between two consecutive first heating pulses, which second duration is less than the first duration and is equal to or less than 5 seconds. The concentration of the gas compound is derived from values indicative of a resistance of the layer as measured in response to one or more of the first and second heating pulses.

Abstract: In a method for operating a portable electronic device an ambient temperature (TS) of the portable electronic device (2) is sensed by means of a temperature sensor (1). It is further detected if a rechargeable energy storage (22) of the portable electronic device (2) is in a process of being recharged. If the energy storage (22) is detected to be in a process of being recharged a compensated ambient temperature (TA) is determined dependent on at least the sensed ambient temperature (TS) and dependent on information (Pi) related to a charging current for recharging the energy storage (22).

Abstract: An input device for triggering a function of an electronic device comprises a humidity sensor (12), and a control unit (11). The control unit (11) analyzes a humidity signal (RH) supplied by the humidity sensor (12) and provides a trigger signal (C) subject to the analysis of the humidity signal (RH) for triggering the function of the electronic device (3). In such way, the function of the electronic device can simply be controlled by blowing at the input device (1).

Abstract: In a portable electronic device, an ambient temperature is sensed by means of a temperature sensor. In addition, it is assessed if the portable electronic device is exposed to condensation. A corresponding condensation indicator is provided. The condensation indicator is determined based on a dew point and based on sensed temperature values of the past or temperature derived from the past sensed temperature values.

Abstract: There is provided a portable electronic device with one or more environmental sensors for measuring an environmental or ambient parameter, a compensator for reducing the difference between a sensor output and the ambient parameter, the compensator being connected to receive a first input based on the sensor output and a second input based on an output of compensator calculated during a previous time step of calculation, and a context evaluator (36) for replacing the second input by an input selected based on conditions as determined by the context evaluator.

Abstract: There is provided a portable electronic device with one or more integrated temperature sensors (12) for measuring an ambient temperature, a compensator (25,26) for reducing the difference between a sensor output (Ts) and the ambient temperature (Ta) with the compensator (25,26) switching depending on environmental and/or handling conditions between a plurality of compensation modes selected dependent on measurements of one or more other integrated and/or external sensors.

Abstract: An input device for triggering a function of an electronic device comprises a humidity sensor (12), and a control unit (11). The control unit (11) analyzes a humidity signal (RH) supplied by the humidity sensor (12) and provides a trigger signal (C) subject to the analysis of the humidity signal (RH) for triggering the function of the electronic device (3). In such way, the function of the electronic device can simply be controlled by blowing at the input device (1).

Abstract: In a method for operating a portable electronic device comprising a chemical sensor, at least one reference reading is taken by the chemical sensor at least one predetermined point in time. At least one compensation value is determined based on at least one reference value wherein each reference value is derived from a result of a corresponding reference reading. A result of an operational reading of the chemical sensor is modified by the at least one compensation value.

Abstract: An input device for triggering a function of an electronic device comprises a temperature sensor (12), and a control unit (11). The control unit (11) analyzes a temperature signal (T) supplied by the temperature sensor (12) and provides a trigger signal (C) subject to the analysis of the temperature signal (T) for triggering the function of the electronic device (3). In such way, the function of the electronic device can simply be controlled by blowing at the input device (1).

Abstract: A portable electronic device comprises a housing and a chemical sensor arranged inside the housing which chemical sensor is adapted to measure a property of at least one analyte. The device further comprises an opening in the housing for exposing the chemical sensor to the fluid to be analyzed.