The invention relates to an arrangement in connection with equipment used
in patient care, the arrangement comprising a controllable device (2a, 2b), a measuring device (5a, 5b) adapted to measure a measuring
signal dependent on the controllable parameter, a measuring point of the measuring
signal, a transmission link (21, 22) between the measuring point of the measuring
signal and the measuring device, which transmission link requires a separate connection, whereby the measuring device (5a, 5b) is adapted to convert the measuring signal into measuring value which correlates with the operation of the controllable device, and the arrangement further comprising a
user interface (20) and a
control unit (7a, 7b) adapted to control the controllable device on the basis of the measuring value and the set values. To minimize damages, the arrangement is adapted to compare the measuring value with the reference value of the environment and the
control unit (7a, 7b) is adapted to disconnect the control of the controllable device (2a, 2b) based on the measuring value when the measuring value obtains a reference value.