Abstract: The present invention discloses methods for detecting and improving temperature stability in measurements performed by a dry block, i.e. a temperature calibrator. The dry block comprises a heating and cooling device. An energy metering integrated circuit measures an applied input power to the heating elements of the heating and cooling device. Additionally, a real-time compensation algorithm uses measurement results obtained by the energy metering integrated circuit, and outputs a control signal to the heating elements. The arrangement may comprise a back draft damper adjacent to a fan. The fan position may be selected. Stability criteria may be set. Leaning of the dry block can be tracked. Different sensors are used for the temperature control and for the temperature stability indication.

Abstract: The present invention discloses a method for regulating temperature in a temperature calibrator, taking into account also a velocity of the change of the temperature. The characterizing features are the steps of calculating a rate of change of the actual temperature of the temperature calibrator by a derivator, which derivator takes the measured temperature, PVT, by the temperature sensor as its input, and letting a user to specify a maximum rate of change for the temperature, as an input value for the processor; and regulating the temperature of the temperature calibrator by the processor so that the maximum rate of change for the temperature is never exceeded, and so that during temperature regulation, when the temperature error signal decreases as a function of time, also the rate of change of the actual temperature is set to decrease as a function of time.

Abstract: A method of determining a high voltage value without measuring the high voltage value directly, in varying possible temperatures. An apparatus includes two voltage divider circuits (108, 110; 109, 111), wherein the second circuit (i.e. a reference circuit 109, 111) is provided with a smaller reference input voltage (102). The transfer ratio can be obtained from the reference circuit (109, 111) through voltage measurements, and deduced into a transfer ratio of another circuit (108, 110), no matter the ambient temperature value. When measuring a divided voltage value (103) of one circuit (108, 110), the desired high voltage value (101) can be calculated, no matter what the ambient temperature is.

Abstract: The present invention discloses a temperature calibrator, which comprises or has an externally attached inclination angle sensing means. A temperature sensor and an internal battery is applied as well, together with a fan. The temperature calibrator comprises regular heating elements, a processor, and a User Interface. The system measures the inclination angle and internal temperature of the temperature calibrator. If the angle or temperature value or both exceed a certain threshold value, the system is configured to switch off the heating elements immediately, and to show or send a warning indicator or signal to the user or manager of the device via the UI 22, e.g. through a red LED light, a beeping sound or a warning message on the screen of the temperature calibrator or of the remote device.

Abstract: The present invention describes an automatic calibration method for a measuring circuit for example in an industrial automation or handling process, where only one person is needed to manage the entire procedure. The components are a calibrator (11) which the worker in the field has with him, which can be connected to the starting end of the measuring circuit in order to give an impulse. The quantity to be measured/calibrated has not been limited. The measurement result is seen at the end of the measuring circuit on a screen of the control room, i.e. DCS (13). Depending on the alternative embodiment, the measured numerical value can be steered either to a dedicated server (14) over an OPC connection, and onwards wirelessly or via Ethernet back to the calibrator (11). One alternative is to use a smart device (16) which the worker has, with suitable applications, to which the measured data can be sent over a network, and the data is also presentable in a user-friendly manner in such an application.

Abstract: The present invention discloses a method and a system for user authentication in an offline mobile calibration or checklist performing device. At first, the work is assigned online in a Calibration Management Software (CMS), where the relevant data is selected and sent to a mobile device. In the field environment as offline, the mobile device requests user credentials from the user, and if valid, the user is able to perform the assigned task. With each obtained result, credentials are asked for saving the results into the mobile device. When the user returns from the field, he/she connects the mobile device with the CMS, and transfers the obtained work data from the mobile device to the CMS.

Abstract: The present invention discloses a method and a system for user authentication in an offline mobile calibration or checklist performing device. At first, the work is assigned online in a Calibration Management Software (CMS), where the relevant data is selected and sent to a mobile device. In the field environment as offline, the mobile device requests user credentials from the user, and if valid, the user is able to perform the assigned task. With each obtained result, credentials are asked for saving the results into the mobile device. When the user returns from the field, he/she connects the mobile device with the CMS, and transfers the obtained work data from the mobile device to the CMS.

Abstract: A process calibrator is formed with functions of a fieldbus communicator. Preferably, functions of a fieldbus communicator support several fieldbus protocols, and it is provided such that the use of it does not hamper the functioning of a process calibrator. This has been achieved by providing the process calibrator with a pair of fieldbus connecting terminals for measuring of the fieldbus signal. The process calibrator comprises a processor, and the pair of fieldbus connecting terminals comprises a signal terminal and a ground terminal. The process calibrator further comprises at least two parallel fieldbus protocol units between the processor and the signal terminal of the pair of fieldbus connecting terminals. Each fieldbus protocol unit is dedicated to its respective fieldbus protocol.

Abstract: A process calibrator is formed with a user interface, which guides to choose the right connection arrangements of the process calibrator according to the function of the process calibrator. The user interface shows in the display of the process calibrator the connection arrangements of the process calibrator and indicates the place of the connection arrangement assigned to the selected function visually compared to other connection arrangements. The connection arrangements shown by the user interface in the display are placed similarly to the physical connection arrangements of the process calibrator. As the user interface indicates the connection arrangement that is assigned to the selected function of the process calibrator, it is easy for the user to make the right connection.

Abstract: A process calibrator is formed with a user interface, which guides to choose the right connection arrangements of the process calibrator according to the function of the process calibrator. The user interface shows in the display of the process calibrator the connection arrangements of the process calibrator and indicates the place of the connection arrangement assigned to the selected function visually compared. to other connection arrangements. The connection arrangements shown by the user interface in the display are placed similarly to the physical connection arrangements of the process calibrator. As the user interface indicates the connection arrangement that is assigned to the selected function of the process calibrator, it is easy for the user to make the right connection.