Amstetten, Austria
Amstetten, Austria

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A method and a measuring device determine the density of liquids. The measuring device has a flexural resonator, at least one sensor for at least one environmental parameter that influences a measurement to be performed and a condition monitoring unit. The measured values from the respective sensor are fed to the condition monitoring unit. The condition monitoring unit has a memory unit with stored forecasts for environmental parameters to be expected in the course of the measurement, and that, by using the condition monitoring unit, on the basis of the stored forecasts and the initial measured values selected for the measurement, it is determined whether the planned measurement can be carried out under the selected trial conditions without any impairment or with a permissible impairment by the forecast changes in the environmental parameters.


A fixing device selectively fixes a measuring probe of a scanning probe microscope. The fixing device comprises an inserting unit in which the measuring probe is insertable and a master force unit for selectively exerting a master force onto a fixing mechanism. The fixing mechanism is actuatable without a tool. The fixing mechanism is enabled or disabled to controllably detach or fix the measuring probe when the measuring probe is inserted in the inserting unit.


A method for actuating an electric motor for a rheometer includes transferring drive energy to a sample. A time profile for deflection is periodic, a value for deflection is a measured variable, the motor is actuated by a manipulated variable, the measured and manipulated variables are mutually nonlinear, an approximation function for the time profile is a weighted sum of base functions, weights for base functions are a parameter vector, the manipulated variable is a weighted sum of base functions. The measured variable is sampled, sampled values are used within a time window, an approximation function for sampled values is a weighted sum of base functions, the weights are an actual parameter vector, a difference between intended and actual parameter vectors is subtracted from the manipulated parameter vector, the manipulated variable is a weighted sum of base functions and values of a new manipulated parameter vector are used as weights.


Measuring a topographic profile and/or a topographic image of a surface of a sample includes positioning an indenter out of contact with a sample and in a constant position with respect to a headstock; positioning a topographic tip to detect a surface of the sample and positioning a reference structure at a predetermined distance from said surface; measuring the relative position of the indenter with respect to the reference structure by a relative position sensor; translating said sample perpendicular to said longitudinal axis while maintaining the reference structure at said predetermined distance from the surface of the sample by the feedback control system and the second actuator while measuring the relative position of the indenter with respect to the reference structure by the relative position sensor; and generating a topographic profile and/or a topographic image based on measurements of the relative position.


Patent
Anton Paar GmbH | Date: 2016-05-20

A measuring instrument for studying fluid samples contains a flexural vibrator. A vibrator tube of which is fixed at at least one clamping position and forms on one side of the clamping position, in particular a carrier unit, a freely projecting vibrator section and on the other side a fluid feed tube section with a feed opening and a fluid discharge tube section with a fluid discharge opening. Accordingly, the vibrator tube is fixed or retained both at its fluid discharge tube section and at its fluid feed tube section with at least one independent holding device provided in addition to the clamping position.


Patent
Anton Paar GmbH | Date: 2016-05-17

A rotary rheometer has two measurement parts which delimit a measurement gap and can be moved relative to one another in a predetermined movement direction by an adjustment device. At least one switching unit is provided, which responds to changes in a force flow in a force circuit of the rotary rheometer delimited by the measurement parts and has switching contacts for the activation of an adjustment device, which stops the adjustment device when a predetermined limit force value is exceeded for the force flow in the positive or negative direction, optionally without relative movement of the measurement parts, or with the measurement parts remaining in the same position.


A dynamic light scattering apparatus (10) comprises a source (1) for irradiating a sample (5) with primary electromagnetic radiation (2), a detector (7) for detecting secondary electromagnetic radiation (6) generated by scattering the primary electromagnetic radiation (2) at the sample (5), a refraction index determination unit (20) comprising a movable optical element (4) and configured to determine information indicative of a refraction index of the sample (5) based on measurements of the secondary electromagnetic radiation for a plurality of different positions of the movable optical element, and a particle size determining unit (22) configured to determine information indicative of particle size of particles in the sample (5) by analyzing the detected secondary electromagnetic radiation (6) and taking into account the refraction index determined by the refraction index determination unit.


Patent
Anton Paar GmbH | Date: 2016-04-27

Measuring apparatus-calibration device for calibrating a measuring apparatus-temperature sensor of a, in particular optical, measuring apparatus, wherein the measuring apparatus-calibration device comprises a, preferably measuring apparatus-external, calibration-temperature sensor, which is traceably calibratable itself, for determining a calibration temperature in the region of a measuring surface of the measuring apparatus and a determination unit which is adapted for determining an information which is indicative for a discrepancy between a measuring apparatus-temperature which is captured by the measuring apparatus-temperature sensor in the region of the measuring surface and the calibration temperature, on whose basis the measuring apparatus-temperature sensor is calibratable.


Patent
Anton Paar GmbH | Date: 2016-05-04

Heating arrangement for a materials testing device (100), the materials testing device (100) comprising at least one surface measurement probe (11) adapted to be brought into contact with a surface of a sample (120), the heating arrangement comprising a probe heater (1a) comprising:- an infrared emitting element (3) adapted to emit infrared radiation;- a reflector (5) having a reflective surface (15a) arranged to direct said infrared radiation towards a distal end of said surface measurement probe (11). According to the invention, the reflector comprises a first focal point (7) and a second focal point (9), the infrared emitting element (3) being situated substantially at said first focal point (7).


Patent
Anton Paar GmbH | Date: 2016-05-04

Surface measurement probe (1) comprising:- a hollow probe body (3; 9, 11, 13, 15) extending along a longitudinal axis and comprising a proximal end adapted to be mounted to a test apparatus and a distal end;- a retaining arrangement (17, 19, 21; 18, 21) situated inside the probe body and extending along said longitudinal axis, the retaining arrangement (17, 19, 21; 18, 21) being arranged to maintain the surface measurement probe (1) in an assembled state;- a probe tip (7) supported at the distal end of the probe body and arranged to contact a sample;- a bead (31) situated inside the probe body (3) and interposed between the probe tip (7) and the retaining arrangement (17, 19, 21; 18, 21), the bead (31) comprising a thermally-insulating material.

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