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Union of India - Section

Section 85 in The Legal Metrology (General) Rules, 2011

85.

% at upper limit temperature.Temperature-humidity sequence : Reference temperature of 200°C at 50% humidity;The upper limit temperature at 85% humidity;Reference temperature of 20°C at 50% humidity.Number of test Cycles: At least one cycle.Weighing test and test sequence: After stabilization of the EUT at reference temperature and 50% humidity, apply at least five different test loads or simulated loads and record:(a)date and time;(b)temperature;(c)relative humidity;(d)test load;(e)indications (as applicable);(f)errors;(g)functional performanceIncrease the temperature in the chamber to the upper limit and increase the relative humidity to 85%. Maintain the EUT at no load for a period of 2 days (48 hours). Following the 2 days, apply at least five test loads and record the data as indicated above. Allow full recovery of the EUT before any other tests are performed.Maximum allowable variations: All errors shall be within the maximum permissible errors specified in Table II.
(3)Mains power supply voltage variation (Ac) [2(9)(ii)]Power voltage variation tests are carried out according to Table VII.Table VII
Environmental phenomena Test specification
Voltage variation Reference voltage
  Reference voltage + 10%
  Reference voltage - 15%
  Reference voltage
Supplementary Information to the test ProceduresObject of the test : To verify compliance with the provisions in paragraph 2(9)(ii) of part II under conditions of voltage variations.Test procedures in brief :Precondition: None required.Condition of the EUT : Normal power supplied and "on" for a time period equal to or greater than the warm-up time specified by the manufacturer. Power is to be "on" for the duration of the test.Adjust the EUT as close to zero indication as practicable prior to the test. If it has an automatic zero-setting function then the instrument should be set to zero after applying each level of voltage.Number attest cycles : At least one cycle.Weighing test : The EUT shall be tested at no load and with one test load or simulated load between 50% and maximum capacity of the EUT.Test sequence : Stabilize the power supply at the reference voltage within the defined limits and record:
(a)date and time;
(b)temperature;
(c)relative humidity;
(d)power supply voltage;
(e)test loads;
(f)indications (as applicable);
(g)errors;
(h)functional performance.
Repeat the test weighing for each of the voltages and record the indications.Maximum allowable variations : All functions shall operate as designed, All errors shall be within the maximum permissible errors specified in Table II.