Laboratory manual for the evaluation of non-automatic weighing devices
Part 2, section 4—Recorded representation (printed)
Table of contents
- 4.0 Recorded representation (printed) – Generalities
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:
|II||Measured Quantity Unit of Measure||
|III||Linking Measured Quantity and Unit Price||
|IV||Dollar sign for Unit Price||
|VI||Linking Unit Price and Unit Quantity||
|VII||Unit Price Quantity||
|VIII||Dollar sign for Total Price||
|IX||Total Extended Price||
Note: Product identification code/name is also required
- A space is required between columns I and II (due to the use of "lb")
- At least 1 space is required between columns II and III
- At least 1 space is required between columns III and IV
- No space between columns IV and V, regardless of whether the "$" is placed before or after the "12.49"
- A space between columns V and VI is optional if the slash "/" is used. If the word "per" ("par" in French) is used then a space is required
- A space between columns VI and VII is optional if the slash "/" is used. If the word "per" ("par" in French) is used then a space is required
- At least 1 space is required between columns VII and VIII
- No space between columns VIII and IX, regardless of whether the "$" is placed before or after the "12.49"
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