TO BE USED FOR DIRECT SELLING TO THE PUBLIC "
UNDER THE CONDITIONS SET OUT IN 10.14.2 AND 10.14.3 .
12 . RECOMMENDED PRACTICAL PROVISIONS
MACHINES WHICH SATISFY THE FOLLOWING PROVISIONS , WHERE APPLICABLE , SHALL BE CONSIDERED AS COMPLYING WITH THE CORRESPONDING GENERAL PROVISION SPECIFIED IN 10 .
12.1 . GENERAL
12.1.1 . MACHINES TO BE USED WHOLLY OR PARTLY WITH WEIGHTS
_ THE REDUCTION RATIO MUST BE IN THE FORM 10N , N BEING A WHOLE NUMBER OR EQUAL TO ZERO ;
_ REMOVABLE WEIGHTS MUST BE REGULATION WEIGHTS .
12.1.2 . SENSIVITY ADJUSTMENT CONTROLS
WITH THE EXCEPTION OF SPECIAL ACCURACY MACHINES THE CONTROLS FOR SENSITIVITY ADJUSTMENT MAY NOT BE LEFT TO THE DISCRETION OF THE USER .
12.2 . LOAD MEASURING DEVICES ON MECHANICAL NON-SELF-INDICATING MACHINES
12.2.1 . LEGIBILITY OF RESULTS
FIGURES OF THE RESULTS OF LOAD MEASURING DEVICES ON GRADUATED MECHANICAL NON-SELF-INDICATING MACHINES MUST COMPLY WITH THE PROVISIONS IN CONCERNING THE FIGURES OF RESULTS OF LOAD MEASURING DEVICES ON SELF - AND SEMI-SELF-INDICATING MACHINES .
12.2.2 . ACCESSIBLE SLIDING POISE DEVICES
. MINIMUM VALUE OF SCALE SPACING
DISTANCES BETWEEN SCALE MARKS OR NOTCHES ON MAJOR AND MINOR BARS MUST BE AT LEAST 2 MM AND BE OF SUFFICIENT VALUE FOR THE NORMAL MACHINING TOLERANCE ON THE SCALE MARKS OR NOTCHES NOT TO CAUSE AN ERROR IN THE WEIGHING RESULT OF MORE THAN 0 * 2 OF A VERIFICATION SCALE INTERVAL .
. UNIFORMITY OF SCALE SPACING ON EACH MAJOR OR MINOR BAR
ON EACH MAJOR OR MINOR BAR DISTANCES BETWEEN SCALE MARKS OR NOTCHES MUST BE EQUAL .
. LIMITATION OF DISPLACEMENT OF THE SLIDING POISES AND MINOR BAR
SLIDING POISES AND MINOR BARS MUST ONLY BE ABLE TO MOVE WITHIN LIMITS OF THE GRADUATED PART .
. IMPOSSIBILITY OF ACCIDENTAL DISPLACEMENT OF SLIDING POISES AND MINOR BARS
ACCIDENTAL DISPLACEMENT OF THE SLIDING POISES AND MINOR BARS MUST BE IMPOSSIBLE .
. EXTERNAL SHAPE OF SLIDING POISES AND MINOR BARS
SLIDING POISES AND MINOR BARS MUST NOT HAVE ANY CAVITIES IN WHICH ANY EXTRA LOAD MAY BE CONCEALED .
. INVARIABILITY OF THE CENTRE OF GRAVITY OF MOVABLE PARTS
MOVEMENT OF MOVEABLE PARTS WITH THE EXCEPTION OF THE NORMAL DISPLACEMENT OF THE SLIDING POISES AND MINOR BARS , MUST NOT BE ABLE TO ALTER THE CENTRE OF GRAVITY OF THESE PARTS OR OF THE MOVEABLE GROUPS OF PARTS WHICH THEY FORM AMONG THEMSELVES .
. PRACTICAL IMPOSSIBILITY OF REMOVAL OF MOVEABLE PARTS
IT MUST BE POSSIBLE TO SEAL MOVEABLE PARTS AND THEIR COMPONENTS IF THEY ARE REMOVABLE .
. SECURITY OF POSITIONING OF PRINTING SLIDING POISES AND THEIR MINOR BARS
SLIDING POISES PROVIDED WITH A PRINTING DEVICE MUST BE SO CONSTRUCTED THAT IT IS IMPOSSIBLE TO PRINT WHEN THE SLIDING POISE OR ANY ONE OF THE BARS IS NOT IN A POSITION CORRESPONDING TO A WHOLE NUMBER OF SCALE DIVISIONS .
12.2.3 . DEVICES WITH SLIDING POISES OPERATED FROM OUTSIDE THE HOUSING
. APPLICATION TO THESE