GB/T 27739-2011Automatic catch weighing instruments (English PDF)

3.1 General definition

3.1.1

Weighing instrument

A measuring instrument that determines the mass of an object by gravity acting on the object.

Note. In this standard, "quality" (or "weight value") is more suitable for the expression "agreed quality" or "agreed value of weighing results in air", and "weight" it is a concrete form of quality (equal to physical measuring tools) that is more suitable for its physical and metrological characteristics.

The scale can also be used to determine other magnitudes, values, parameters or characteristics of the mass function.

According to its operation, the scale can be divided into automatic weighing instruments and non-automatic weighing instruments.

3.1.2

Automatic weighing instrument an instrument that automatically weighs in accordance with a predetermined processing procedure without operator intervention during the weighing process.

3.1.3

Automatic check weighing instrument automaticcatchweighinginstrument; catchweigher an automatic weighing instrument that weighs pre-packaged discrete loads or loose single loads.

3.1.3.1

Checkweigher Dividing pre-packaged discrete loads (items) of different qualities into two or more types according to the difference between their mass and nominal set points the quantity is automatically scaled. Checkweighing scales are also known as weight inspection scales, sorting scales, weight sorting scales, inspection scales, and inspection scales.

3.1.3.2

Label scale weighlabeler an inspection scale with a dedicated labeling mechanism that identifies the weight value of each prepackaged discrete load.

3.1.3.3

Pricing label scale weigh-pricelabeler Inspection scale with price and special labeling mechanism. Calculate the price according to the indicated quality and unit price, and indicate the pre-package on the label the weight value, unit price and total price of the discrete load.

3.1.3.4

Vehicle-mounted scale vehiclemountedinstrument A complete automatic weighing instrument that is designed for a specific application and is securely mounted on the vehicle.

Note. For example, a garbage scale (waste collection vehicle) is used to determine the amount of bulk items that are poured into a vehicle body from a container (supported by a carrier).

3.1.3.5

Vehicle combination scale vehicleincorporatedinstrument an instrument in which the vehicle and the weighing portion share the same components (lever, connecting piece, force converter, etc.).

Note. For example, a front loader (front loading vehicle) can determine the amount of bulk material in the bucket (carrier) when loading the bulk material.

3.1.4

Bulk material loosematerial Materials that are not packaged during weighing or weighing. This material can be collected and placed on a carrier (such as a preload) Weighing in a separate container (waste scale).

3.1.5

Equalizer gradinginstrument the weighing result is assigned to a predetermined mass range to determine the scale of the price or rate.

For example, postal scales, garbage scales.

3.1.6

Electronic weighing instrument electronicinstrument an instrument equipped with an electronic device.

3.1.7

Control scale controlinstrument A standard measuring instrument used to determine the quality of the test for the scale of the test.

In the test, the control scale as a reference value can be.

--- Another independent weighing instrument separate from the instrument under test, called the separate control weighing instrument.

--- The test scale is used as a control scale, called the integrated control scale, which provides a static weighing mode.

3.1.8

(quantity) convention true value (ofaquantity) for a given purpose, with appropriate uncertainty, given a certain amount of value, sometimes the value is agreed upon.

3.1.9

Legal authority

A representative body authorized by the national legal metrology department, a certification organization or a manufacturer that has passed the national quality system certification.

There is a duty to determine that the instrument meets all or some of the requirements of this standard.

3.1.10

Indicator indicating value of indicationsofaninstrument the amount provided by the measuring instrument.

Note. "Indicative", "Indication" or "Sign" includes both displayed and printed.

3.1.10.1

Main indication primaryindications Indications, signals and symbols that meet the requirements of this standard.

3.1.10.2

Auxiliary indication secondaryindications Indicators, signals, and symbols other than the primary indication.

3.1.11

Metrology related metrologicalyrelevant any device, module, component, device, function, or software of the instrument that is considered to be a weighing result or any other primary indication is considered to be Measurement related.

3.2 Structure

Note. In this standard, the term "device" refers to any method of performing a particular function, regardless of its implementation mechanism. For example, through a mechanical device or a A button initiates an operation; the device can be a small or major component of the scale.

3.2.1

Carrier loadreceptor the weapon is used to carry the load on the part.

3.2.2

Load transfer device load-transmittingdevice the force generated by the load acting on the carrier is transmitted to the components of the load measuring device.

3.2.3

Load measuring device the weighing device is used for measuring by means of a balancing device (for balancing the force transmitted by the load transmitting device) and a pointing device or a printing device Load quality parts.

3.2.4

Load conveyor A device that feeds a load into or out of a carrier.

3.2.5

Load transfer system loadtransportsystem A system for delivering loads to a carrier.

3.2.6

Display device (on the scale) displayingdevice(ofaweighinginstrument) A device that provides a weighing result in a visual form.

3.2.7

Module

An identifiable component used to perform one or more specific functions. This component can be based on the measurement and technical requirements in the relevant national standards.

Come to evaluate separately. The module of the instrument is subject to the specified local error limits of the instrument.

Typical scale modules are. load cells, weighing indicators, analog or digital data processing devices, weighing modules, terminals, remote displays and so on.

3.2.7.1

Load cell loadcel

After considering the effects of gravity acceleration and air buoyancy on the ground, by converting the main measured value (mass) into another measured value (transmission) the signal is used to measure the mass of the force sensor.

3.2.7.2

Weighing indicator the output signal of the symmetrical weight sensor can be converted from analog to digital and further processed. At the same time with quality A weighing instrument that displays the weighing result for the unit. Formerly known as the weighing display controller.

3.2.7.3

Analog data processing device the output signal of the symmetrical weight sensor is converted from analog to digital, and the data is further processed. And no need to display these data are, but a scale electronic device that provides a weighing result in digital format through a digital interface. It can carry one or more Keys to operate the scale.

3.2.7.4

Digital data processing device Further processing the data, and without the need to display the data, but through a digital interface to provide a balance of weighing results in digital format Electronic device. It can carry one or more keys to operate the scale.

3.2.7.5

Weighing module Includes all mechanical and electronic devices (eg, carriers, load transfer devices, load cells, and analog data processing devices), but does not require display the part of the scale showing the weighing result. It can have multiple devices to further process (digital) data as well as operate the instrument.

3.2.7.6

Terminal

One or more keys to operate the scale and indicate the number by the weighing module or analog data processing device via a display A digital device that weighs the results of the interface.

3.2.7.7

Digital display can be embedded in a weighing indicator housing or in a computer terminal housing, or as a display with a separate housing (ie, without a button) End), for example in combination with a weighing module.

3.2.7.8

software

3.2.7.8.1

Legal related parameters legalyrelevantparameter it is a measuring instrument or equipment and meets the functional parameters specified and implemented by the legal system.

The types of legally relevant parameters can be divided into type specific parameters and device specific parameters.

3.2.7.8.2

Type specific parameter the value of the legally relevant parameter depends only on the type of the instrument. Type-specific parameters are part of the statutory related parameters, they are in the scale the evaluation has been determined.

3.2.7.8.3

Device specific parameter A legally associated parameter with a value that is determined by the instrument associated with it. Device specific parameters include calibration parameters (eg, range adjustment or other adjustments or corrections) and configuration parameters (eg, maximum capacity, minimum capacity, unit of measure, etc.). These parameters are only in balance the device's specific operating mode is adjustable or selectable. Device specific parameters can be divided into two categories, one should be protected (not Change); the other type is to allow authorized personnel to access the incoming (settable parameters).

3.2.7.8.4

Software identification an easy-to-read software serial number and an inseparable correspondence with the software (such as version number, check code).

3.2.7.8.5

Data storage device the internal memory of the instrument or an external (removable) storage device for long-term storage of weighing data after weighing is completed.

3.2.7.8.6

Software segmentation softwareseparation the statutory related software and the illegal related software can be clearly divided. If the software is not divided, the whole software is considered to be legal.

Off.

3.2.8

Electronic components 3.2.8.1 Electronic device A device that uses electronic components to construct and perform or perform a particular function. It is usually a separate unit that can be accessed separately Test.

Note. The electronic device as defined above may be a complete set of scales (such as a set of directly sold instruments), a module (such as a display, analog data office).

Device, weighing module) or a set of peripheral devices (such as printers, auxiliary displays).

3.2.8.2

Electronic component electronicsub-assembly A portion of an electronic device that is comprised of electronic components and that has its own defined functional characteristics.

For example, an A/D converter, a display.

3.2.8.3

Electronic components the smallest physical entity that conducts electricity using electrons or holes in a semiconductor, gas, or vacuum. For example, tubes, transistors, integrated circuits.

3.2.9

Weighing device indicating deviceofaweighinginstrument the load measuring device component that displays the weighing result in mass units can also be additionally displayed.

--- the difference between the quality of the item and the standard value;

--- The average and/or standard deviation of a certain number of consecutive weighings.

3.2.9.1

Indicating device with differential scale indexing equipment receivingdevicewithadifferentiatedscaledivision the last digit after the decimal point is a digital pointing device that is clearly distinguishable from other digits.

3.2.9.2

Extended indicating device According to the manual command, the actual scale value (d) of the scale can be temporarily converted into a device smaller than the verification scale value (e).

3.2.10

assisting equipments 3.2.10.1 Setting device A device that sets the quality grouping limits.

3.2.10.2

Rated set point nominalsetpoint the operator sets the preset value in units of mass by the setting device in order to establish the limit between consecutive groups.

3.2.10.3

Adjustment range A range of weight values close to the set point beyond which the relative error will be exceeded.

3.2.10.4

Counter

Means for counting the number of loads passing through the carrier (rotation counter) or means for indicating the number of loads in each packet (grouping counter).

3.2.10.5

Sorting device A device that automatically separates into multiple groups by the actual load of the item.

3.2.10.6

Leveling device A device that adjusts the scale to its reference position.

3.2.10.7

Tilt limiting device Prevents the scale from exceeding a predetermined slope value when it is running.

3.2.10.8

Zero setting device A device that adjusts the value to zero when there is no load on the carrier.

3.2.10.8.1

Non-automatic zero setting device A device that can be zeroed by the operator by manual adjustment.

3.2.10.8.2

Semi-automatic zero-setting device A device that automatically sets the value to zero after the operator gives a manual command.

3.2.10.8.3

Automatic zero setting device A device that automatically sets the indication to zero after weighing is completed without operator intervention.

3.2.10.8.4

Initial zeroing device initialzero-settingdevice A device that automatically adjusts the indication to zero before the instrument is switched on and used.

3.2.10.9

Zero tracking device A device that automatically keeps the zero indication within a certain limit.

3.2.10.10

Tare device A device that adjusts the value to zero when there is a load on the carrier.

--- does not change the weighing range of the payload (adding the tare device);

--- Reduce the weighing range of the payload (deducting the tare device).

it can be.

--- Non-automatic device (manually balance the tare load by the operator);

--- Semi-automatic device (the operator automatically balances the tare load after giving a manual command);

--- Automatic device (automatically balances the tare load without operator intervention).

3.2.10.10.1

Tare weight balancing device tarebalancingdevice A device that does not display the tare value (3.3.2.3) when there is a load on the scale.

3.2.10.10.2

Tare weighing device A tare device that stores, displays, and prints tare values (3.3.2.3) regardless of the load on the scale.

3.2.10.10.3

Preset tare device A device that subtracts the preset tare value (3.3.2.4.1) from the gross weight (3.3.2.1) or the net weight value (3.3.2.2) and displays the result of the calculation. net the weighing range of the load is also reduced accordingly.

3.2.11

Dynamic setting in order to eliminate the adjustm...