Laboratory manual for the evaluation of non-automatic weighing devices

Part 2, section 4—Recorded representation (printed)

Table of contents


Reference

Sections 30 to 38, 66 and 67 of the Specifications Relating to Non Automatic Weighing Devices (1998)

4.0 Recorded representation (printed) – Generalities

The recording element (printer) of a device shall be appropriate and compatible with the device. Recorded representations must be clear, definite, accurate and easily readable. The interfacing of a printer to a device must not cause any alteration or degradation of the metrological characteristics of the device and must not facilitate the perpetration of fraud. The following are requirements that apply to printers and printed tickets.

4.1 All recorded values shall be permanent, legible and printed in digital format.

4.2 The device must indicate and print weight values in the same unit of measurement.

4.3 The value of d printed and the value of d displayed must be the same (except for postal scales and weight classifiers).

4.4 The value of d printed may be larger than the value of d displayed by a weight classifier provided that the measurement, the weight classification and the pricing are accurately determined. Tests must be performed at the turning points of price ranges.

4.5 Except for weight classifiers, a printer must record the same value and number of decimal places as indicated on the display.

Clarification: A digital indicator may display weight values in 0.005 kg and 0.01 lb scale Intervals. The printer must therefore record weight values to 0.005 kg in metric and 0.01 lb when measuring in pounds. It may not record weight values to 0.010 lb.

4.6 All recorded weight values, such as gross, tare, net, inbound and outbound weights, shall be clearly identified using acceptable words, abbreviations or symbols (see Appendix 2-A). However, if only one weight is printed, it does not have to be identified as the "net" weight.

4.7 If the unit of measurement of the device can be externally selected by the user (lb/kg switch), the printer must record the proper unit of measurement along with the weight values. Preprinted tickets stating the weight unit are acceptable for indicators capable of displaying one weight unit only or which have an internal lb/kg switch.

4.8 Computation must be in mathematical agreement (gross weight – tare weight = net weight; unit price × net weight = total price, rounded off to the nearest cent).

For price computing devices

4.9 Unit prices must be printed when total prices are shown and both have to be clearly identified as the unit price and the total price.

For point of sale (POS) weighing systems

Definition: a weighing element or a non computing scale interfaced with an electronic cash register or computer. Usually, the cash register or computer reads the gross weight provided by the scale, assigns a tare through a PLU code and prints a net weight on the cash register tape. The cash register must not interfere with the operation of the scale. A stand alone price computing scale used in conjunction with an electronic cash register would not fall into this category.

4.10 The cash register tape must provide the information required by section 67 of the Specifications. That is, the net weight, the price per unit, the computed price, and the appropriate identification code or product name. Furthermore, in order to standardize content and layout, as well as adding clarity to POS receipts, it is recommended that the rules and the example found in the table Point of Sale (POS) Receipts, at the end of this section be followed. Please note that the identification code/product name has been left out of the example for clarity; this information is however required on actual POS receipts.

Note: A POS system may display the gross weight on the scale display and the net weight on the cash register display; however, it must print the net weight on the cash register tape. The scale of a POS system is not required to display the net weight nor provide an indication that a tare value has been entered.

Training mode is no longer required on POS systems.

For weight classifiers

4.11 In the case of weight classifiers, it is acceptable if the printed ticket provides the weight only or the weight along with the total price to be paid. The unit price is not necessary since the total price to be paid is determined on the basis of weight ranges within the device's weighing capacity rather than on the basis of a price per unit.

Point of sale (POS) receipts

4.12 Printed receipts must comply with the following requirements:

Point of sale (POS) receipt requirements
Column Value Requirements
I Measured Quantity
  • Must be identical to the scale display (interval size and capacity limitation).
  • Must print a zero before the decimal point if the weight is less than 1 kg or lb. (e.g. 0.55 kg) A period or comma can be used as the decimal point. (e.g. 1.25 kg or 1,25 kg)
II Measured Quantity Unit of Measure
  • "kg" or "lb" must be all lowercase letters.
  • The use of "kgs", "lbs" or "#", as the symbol for pounds, are not acceptable.
III Linking Measured Quantity and Unit Price
  • The symbol "@" or the word "at" or ("à" in French) are all acceptable. Optional if the other values are clearly identifiable in a titled column format
IV Dollar sign for Unit Price
  • "$" may be placed before or after the value in column V. The symbol is required for unit price.
V Unit Price
  • Must be two digits after the decimal point (e.g. $1.23)
  • Must be preceded by a zero, before the decimal point, if the value is less than one. (e.g. $0.99) A period or comma can be used as the decimal point. (e.g. $1.23 or $1,23)
VI Linking Unit Price and Unit Quantity
  • The symbol "/" or the word "per" or ("par" in French) are all acceptable. Optional if the other values are clearly identifiable in a titled column format.
VII Unit Price Quantity
  • "kg" or "lb" must be all lowercase letters.
  • The use of "lbs" or "#", as the symbol for pounds, is not acceptable.
VIII Dollar sign for Total Price
  • "$" may be placed before or after the value in column IX.
  • The symbol is required for total price if there is only one space between columns VII and VIII. Optional in there are two or more spaces.
IX Total Extended Price
  • Must be two digits after the decimal point. (e.g. $1.23)
  • Must be preceded by a zero, before the decimal point, if the value is less than one. (e.g. $0.99) A period or comma can be used as the decimal point. (e.g. $1.23 or $1,23)

Note: Product identification code/name is also required

Spacing:

Sample receipts

Figure 1
Sample receipts
Description of Figure 1

Six examples of acceptable Point of Sale (POS) receipt formats. Any combination is acceptable as long as the information is clear.

In the first example, two rows per item are required. The product appears in the first row. The quantity and unit of measure as well as the price per unit of measure and total extended price appear in the next row. The symbol "@" is used to separate quantity and unit price. The symbol "/" is used to separate unit price from units and a space is used to separate extended price from the rest of the information. The total price for the sale appears at the bottom of the receipt and is preceded by the label "Total". The dollar sign may be before or after the unit and total prices.

In the second example, two rows per item are required. The product price lookup code (PLU) appears in the first row. The quantity and unit of measure as well as the price per unit of measure and total extended price appear in the next row. The symbol "@" is used to separate quantity and unit price. The word "per" is used to separate unit price from units and a space is used to separate extended price from the rest of the information. The total price for the sale appears at the bottom of the receipt and is preceded by the label "Total". The dollar sign may be before or after the unit and total prices.

In the third example, three rows per item are required. The product name appears in the first row. The quantity and unit of measure as well as the price per unit of measure appear in the second row. The total extended price appears on a line by itself and the total price for the sale appears at the bottom of the receipt and is preceded by the label "Total". The dollar sign may be before or after the unit and total prices.

In the fourth example, two rows per item are required. The product price lookup code (PLU) appears in the second row. The quantity and unit of measure as well as the price per unit of measure appear in the first row. The total extended price appears on a line by itself and the total price for the sale appears at the bottom of the receipt and is preceded by the label "Total". The dollar sign may be before or after the unit and total prices.

In the fifth example, two rows per item plus a header row for Item, Unit Price and Total price are required. The product name appears in the first row. The quantity and unit of measure as well as the price per unit and extended total price appear on the second line. A space is used to separate the quantity from the unit price. The symbol "/" is used to separate unit price from units and a space is used to separate extended price from the rest of the information. The total price for the sale appears at the bottom of the receipt and is preceded by the label "Total". The dollar sign may be before or after the unit and total prices.

In the sixth example, three rows per item are required. The product price lookup code (PLU) appears on the first row. The weight is on the second row. The unit price, units and extended total price are on the third row. The row is preceded with the "@" symbol and the total extended price is separated from the units by a space. The total price for the sale.

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