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[Cites 0, Cited by 0] [Section 10k] [Entire Act]

Union of India - Subsection

Section 10k(9) in The Standards of Weights and Measures (General) Rules, 1987

(9)Variation due to influence quantities and timeAn instrument shall comply, unless otherwise specified, with sub-paragraphs (6), (7) and (8) of this paragraph under the conditions of (ii) and (iii) of sub-paragraph (9) of this paragraph and additionally it shall comply with clauses (i) and (iv) of sub-paragraph (9) of this paragraph.
(i)Tilting
(a)For instrument of class II, III or IV liable to be tilted, the influence of tilting shall be determined under the effect of a lengthwise or transverse tilting equal to 2/1000 or corresponding to the limiting value of tilting marked on, or indicated by a level indicator, whichever is the greater tilt.
The absolute value of the difference between the indication of the instrument in its reference position (not tilted) and the indication in the tilted position shall not exceed:-at no load, two verification scale intervals, (the instrument having first been adjusted to zero at no load in its reference position) except instruments of class II.-at self indication capacity and at maximum capacity, the maximum permissible error (the instrument having been adjusted to zero at no load both in the reference and in the tilted position).An instrument shall be fitted with a leveling device and a level indicator fixed firmly on the instrument in a place clearly visible to the user, unless the instrument is:-freely suspended, or-installed in a fixed position, or-complying with the requirements on tilting when tilted to 5% in any direction.The limiting value of the level indicator shall be obvious, so that tilting is easily noticed.Note.-Limiting value of tilting: Displacement of 2 mm from a central position.
(b)On a class I instrument, the limiting value of tilting shall correspond to a tilt of no more than 2/1000 otherwise the instrument shall meet the requirements for instruments of class II.
(ii)Temperature
(a)Prescribed temperature limits
If no particular working temperature is stated in the descriptive markings of an instrument, this instrument shall maintain its metrological properties within the following temperature limits:-10°C, + 40°C
(b)Special temperature limits
An instrument for which particular limits of working temperature are stated in the descriptive markings shall comply with the metrological requirements within those limits.The limits may be chosen according to the application of the instrument.The ranges within those limits shall be at least equal to:-5°C for instruments of class (I)-15°C for instruments of class (II)-30°C for instruments of class (III) and (IIII)
(c)Temperature effect on no-load indication
The indication at zero or near zero shall not vary by more than one verification scale interval for a difference in ambient temperature of 1°C for instruments of class (I) and 5°C for other classes.For multi-interval instruments and for multiple range instruments this applies to the smallest verification scale interval of the instrument.
(iii)Mains power supply
An instrument operated from a mains power supply shall comply with the metrological requirements if the power supply varies:-in voltage from:-15% to + 10% of the value marked on the instrument,-in frequency: from-2% to +.2% of the value marked on the instrument, if alternate current is used.
(iv)Time
Under reasonably constant environmental conditions, an instrument of class I, II or III shall meet the following requirements:
(a)When any load is kept on the instrument, the difference between the indication obtained immediately after placing a load and the indication observed during the following 30 minutes, shall not exceed 0.5 e. However, the difference between the indication obtained at 15 minutes and after that at 30 minutes shall not exceed 0.2 e.
If these conditions are not met, the difference between the indication obtained immediately after placing a load on the instrument and the indication observed during the following four hours shall not exceed the absolute value of the maximum permissible error at the load applied.
(b)The deviation on returning to zero as soon as the indication has stabilised, after the removal of any load which has remained on the instrument for one half hour, shall not exceed 0.5 e.
For a multi-interval instrument, the deviation shall not exceed 0.5 e,On a multiple range instrument, the deviation on returning to zero from Max. shall not exceed 0.5 e,. Furthermore, after returning to zero from any load greater than Max, and immediately after switching to the lowest weighing range, the indication near zero shall not vary by more than el during the following 5 minutes.
(c)The durability error due to wear and tear shall not be greater than the value of the maximum permissible error.
Adherence to this requirement is assumed if the instrument has passed the endurance test specified in paragraph 9, which shall be performed only for instrument with Max≤100 kg.