Abstract: A draft shield (1) for a balance has a rear wall (2), a front wall (11), two side walls (9, 10), a top cover 8, and rail members (3, 4) which extend from the upper corners of the rear wall (2) to the upper corners of the front wall (11) and carry guide tracks (5, 6, 7) in which the top cover (8) and the side walls (9, 10) are slidably seated. According to the invention, each rail member (3, 4) includes at its front end a spring element and a holder element which are integrally connected to the rail members (3, 4) and are made of one piece with the latter. The spring elements and the holder elements are arranged on the rail members (3, 4) in such a way that the front wall (11) can be inserted between the spring elements (16) and the holder elements (17), and as a result of said insertion the front wall (11) will be secured to the rail members (3, 4).

Abstract: A head (5) is associated with a device (1) for dispensing measured dosages of a free-flowing material. The head has housing (3) with an interior space (59) with a fill opening (57) and a discharge orifice (62). A shutter bolt (80) is arranged in the housing to open and close the discharge orifice (62) and to loosen and advance the material. The head (5) has a dispensing position, in which the shutter bolt is oriented substantially vertically and a fill position. In the dispensing position, the material is dispensed through the discharge orifice (62). In the fill position, material is filled through the fill opening (57), which is positioned laterally on the housing when the head is in the dispensing position. A rest surface (51) is diametrically opposite the fill opening, so that the head lies on its rest surface in the fill position.

Abstract: An instrument (10) for gravimetrically determining moisture content has a housing (20), with a weighing device (40) arranged inside. The weighing device (40) has a load receiver (60) onto which a sample (62) is placed. The housing has a stationary housing part (21) and a movable housing part (22), the movable housing part alternately occupying a measuring position and a loading position. In the loading position, the respective housing parts are spaced apart from each other, allowing a sample to be put on the load receiver. In the measuring position, the respective housing parts form an essentially enclosed testing compartment (30) that surrounds the load receiver. A means (70), arranged in the testing compartment, heats a sample that is placed on the load receiver. The movable housing part is moved between the respective positions by a position-changing device.

Abstract: A force-measuring device (1) for a gravimetric measuring instrument has a stationary part (11) and a load-receiving part (12). Parallel guide members (14, 15) connect the receiving parts. The device also has at least one balance beam (19) connected to the load-receiving part through a coupling element (17) acting on a first lever arm (18) thereof, and which, at a second lever arm (20) thereof, is connected to a measurement transducer (22) which is arranged on the stationary part. Further levers (29, 30) can be arranged, respectively, between the first lever arm and the load-receiving part, and between the second lever arm and the measurement transducer. At least one sliding weight (23, 23A, 23B) is arranged on the at least one balance beam, wherein the position of each of the sliding weights present can be varied in a controlled way by means of at least one drive mechanism.

Abstract: An instrument (10) for gravimetric moisture determination has a housing (20) and a weighing device (40) arranged inside. The weighing device has a load receiver (60) onto which a sample (62) is placed. The housing has stationary (21) and movable (22) housing parts, the movable housing part alternately occupying a measuring and a loading position. wherein in the loading position the stationary housing part and the movable housing part are spaced apart from each other in such a way that a the sample can be put on the load receiver, wherein in the measuring position the respective housing parts form an essentially enclosed testing compartment (30) surrounding the load receiver (60), and wherein a sample-heating means (70) is arranged in the testing compartment to heat the sample on the load receiver. The instrument also has an electrical contact means (85) with first (86) and second parts (87).

Abstract: An instrument (10) for gravimetrically determining moisture content has a housing (20), with a weighing device (40) arranged inside. The weighing device (40) has a load receiver (60) onto which a sample (62) is placed. The housing has a lower, stationary housing part (21) and an upper, movable housing part (22), the movable housing part alternately occupying a measuring position and a loading position. In the loading position, the respective housing parts are spaced apart from each other, allowing a sample to be put on the load receiver. In the measuring position, the respective housing parts form an essentially enclosed testing compartment (30) that surrounds the load receiver. A temperature sensor (80) is arranged so that the temperature sensor is above the load receiver in the measuring position and is essentially to the side of the load receiver in the loading position.

Abstract: A gas analyzer for the absorption-spectroscopic in-situ determination of at least one chemical and/or physical parameter of a gaseous measurement medium, wherein the gas analyzer includes a first housing; at least one laser as a radiation source, which laser is arranged in the first housing; at least one first process window for coupling the radiation emitted by the laser into a measurement medium; and at least one detector by which, following interaction with the measurement medium, the radiation is detected. The first process window can be configured as an afocal meniscus lens having a convex surface and a concave surface.

Abstract: A parallel-guiding mechanism (120) has a movable parallel leg (121), a stationary parallel leg (122), a first parallel-guiding member (123) and a second parallel-guiding member (124). The parallel legs and the parallel-guiding members are connected to each other by flexure pivots, in the form of narrow material connections. There is at least one adjustment zone (135). An adjustment flexure fulcrum (136) is arranged between a flexure pivot (131) and a parallel leg. The adjustment zone is connected to the first lever end (138) of an adjustment lever (137). The adjustment flexure fulcrum forms the lever fulcrum (146) of the adjustment lever, which has an elastic domain with a section modulus that is smaller than a section modulus of the adjustment flexure fulcrum.

Abstract: A method and system for testing the functional capability of an analytical instrument uses first and second blind samples. Each blind sample is a test substance with an amount of a parameter to be tested that is unknown to the user. Each blind sample is provided with an identification means with a unique identification. When the blind samples are tested by the user in the instrument being tested, the measurement values obtained and the unique identifications read are compared against predetermined values that are accessible to a test program configured as software on the analytical instrument. By comparison of the measurement values and the predetermined values, the functional capability of the analytical instrument is determined and the result is transmitted to an output unit of the analytical instrument.

Abstract: A method of manufacturing a reference electrode which has a shaft into which a diaphragm body of a porous ceramic is incorporated is comprised of the following method steps: Impregnating the ceramic with a lyogel precursor prior to incorporating the ceramic body into the shaft, and subsequently transforming the lyogel precursor into a lyogel, from which the solvent is removed through a drying process. A reference electrode has a shaft that is filled with electrolyte, and a diaphragm body formed of a porous ceramic and containing a system of hollow spaces is incorporated into the wall of the shaft. The system of hollow spaces is filled at least partially with a material that is formed of a lyogel by drying and has at least one component that corresponds to the ceramic material.

Abstract: A device is disclosed for preparing a solution of a solid with a liquid and/or a dilution of a liquid with another liquid includes a balance with a weighing pan, a display- and operating unit, a processor, a storage memory, and a data interface. The device includes at least one electronic dosage delivery device for liquids, in particular an electronic pipette, with a microprocessor, a memory unit, and a data interface, so that a communication can be established between the respective data interfaces of the balance and the at least one electronic dosage delivery device. An identifier element signals when the electronic dosage delivery device has been selected. A program is configured to perform calculations in the processor of the balance based on instructions given by the attendant, based on substance data stored in the memory of the balance and in certain cases based on weighing results.

Abstract: A method of manufacturing a reference electrode which has a shaft into which a diaphragm body of a porous ceramic is incorporated is comprised of the following method steps: Impregnating the ceramic with a lyogel precursor prior to incorporating the ceramic body into the shaft, and subsequently transforming the lyogel precursor into a lyogel, from which the solvent is removed through a drying process. A reference electrode has a shaft that is filled with electrolyte, and a diaphragm body formed of a porous ceramic and containing a system of hollow spaces is incorporated into the wall of the shaft. The system of hollow spaces is filled at least partially with a material that is formed of a lyogel by drying and has at least one component that corresponds to the ceramic material.

Abstract: A weighing module 1 has a force-transmitting linkage 13 arranged between the load-receiving portion 3 of the weighing cell 2 and the load receiver 5, with an overload protection device that precisely maintains its position being an integral part of the force-transmitting linkage 13. By means of a positioning element 7, 107, 207, the load receiver 5 is positioned without play relative to the load-receiving portion 3 in the plane that extends orthogonal to the load direction, and the load receiver 5 is also guided in the load direction without play. When forces in excess of the pre-tension force of the elastic element 8 act on the load receiver 5, the latter has the capability of being displaced in the load direction and to tip in all directions that are orthogonal to the load direction. The housing part 18 serves to delimit at least the range of linear downward deflection as well the tipping movement of the load receiver 5 when the load receiver 5 is exposed to transverse forces and to overloads.

Abstract: An exemplary weighing module is disclosed which has a load receiver and a weighing cell that are connected to each other by a force-transmitting rod, wherein the weighing module is arranged inside a design space whose dimensions in a plane extending orthogonal to the load direction are limited by the design spaces occupied by neighboring weighing cells or represent the largest dimension of the weighing cell in said plane. An exemplary weighing cell has a parallel-guiding mechanism in which at least one movable parallel leg which is connected to the force-transmitting rod and at least one stationary parallel leg are arranged with a predefined guiding distance from each other, connected to each other by at least one upper parallel-guiding member and at least one lower parallel-guiding member. The effective length of the parallel-guiding members is larger than the guiding distance, and the movable parallel leg does not protrude out of the design space.

Abstract: A balance is equipped with a draft shield that surrounds a weighing compartment and has at least one sidewall which can be designed to be slidable to allow the draft shield to be opened and closed. An access opening is provided in the sidewall, and a closure element serves to close off the access opening. The size and position of the access opening in the sidewall can be varied by means of the closure element.

Abstract: The functioning of an amperometric electrochemical sensor having an electrochemical cell is monitored by the electrochemical cell. A perturbation quantity is imposed on the sensor, which is operated with voltage control at a given polarization voltage. The response to the perturbation is measured and a check value is calculated, using the response under the perturbation as an input value. The check value is compared to a system-dependent limit value. If the check value is larger than the system-dependent limit value, the initial polarization voltage is changed by a predefined voltage increment and the process is repeated, until an optimal polarization voltage has been found, i.e., until the calculated check value is smaller than the system-dependent limit value. A measuring system that serves to carry out the method is also described. An automated embodiment utilizes a computer-supported control- and processing-unit with a data memory and a data-evaluating program.

Abstract: A scale (1) having a scale housing (3) serving to house the weighing mechanism and the weighing electronics, which stands on a support base on at least three support points (5,5?), is designed to be connectable to and disconnectable from a display and operating unit (6). A connection element (9) is provided to produce a mechanical coupling between the scale (1) and the display and operating unit (6), which can be attached to the bottom side of the scale housing (3) and is designed to be supported on at least two support points (5) of the scale (1) and can be engaged in a self-locating way in a third point on the bottom side of the scale housing (3).

Abstract: A weighing module with a housing surrounding a weighing cell on all sides has a vertically movable force transfer member designed to be connected to a load-receiving device. The force transfer member extends through a passage opening of a housing wall and is rigidly connected to a vertically movable part of the weighing cell. The weighing module includes a dust-removing device which further includes a means for generating a gas flow directed away from the movable part of the scale for the purpose of preventing an accumulation of dust between the stationary housing and the vertically movable force transfer member.

Abstract: A device to weigh substantially uniform weighing objects has a plurality of weighing modules and an equal number of load carriers that have central lengthwise axes extending in the direction of the load. Each of the load carriers is connected, respectively, to one of the weighing modules through a force-transmitting rod, and the load carriers are disposed in a given spatial or two-dimensional arrangement in which the distances between neighboring central lengthwise axes are smaller than the largest lengthwise extension of the respective weighing modules.