Dedoussis Engineering LTD
e-Batch Concrete
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2.4.3 – The Traceable Access Code (TAC )
The system has provide a guard against improper access of the
calibration commands. The LDU xx.1 digitizer features the
Traceable Access Code. or TAC method of controlling the
access to the calibration commands group. This means that a
code is maintained within the device, and is incremented
whenever any change to any of the calibration commands is
saved.
When performing the ‘stamping’ test, the Trading Standards
Officer will make a note of the TAC, and advise the user that
any change to this code which occurs prior to the regular re-
inspection by the Trading Standards Office, will result in legal
prosecution of the user.
The user software is required as a condition of approval, to
make the TAC available to the weight display indicator or
console, on demand.
Restrictions upon usage when in ‘Approved’ applications
A number of performance restrictions must come into force.
These restrictions are the number of display divisions, which
may become limited to 10000 divisions, and the sensitivity
per display division, which becomes 0.7uV per division.
Once installed in the application, an ‘approved’ application will
require ‘stamping’ by an Officer of the relevant Governmental
Trading Standards Department.
This certifies the equipment or system as being in accordance
to the relevant regulations and within calibration limits.
The term ‘approved’ applies whenever the weighing application
is intended to be used for ‘legal-for-trade’ weighing - that is,
money will change hands according to the weight result.
Such applications are bound by the legal metrology regulations
of the relevant governments around the World, but most
