The National Measurement and Regulation Office (NMRO) is looking for any further views from the UK in relation to an amendment to International Organization of Legal Metrology (OIML) technical working documents for automatic weighing instruments (R61).
OIML Recommendation R 61 Automatic gravimetric filling Instruments 2004E, Parts 1 (Metrological and Technical Requirements), part 2 (Test methods) and part 3 (Report Format) are listed below for your review and comments. These drafts were prepared by NMRO as UK Secretariat of OIML TC9/SC2 Automatic weighing instruments.
Please review the OIML R 61 documents listed below and comment to help improve the drafts using the comment templates by 04 December 2015.
Main changes in the new R 61 draft
NMRO implements contributions from the members of the OIML working group. In particular, the following changes have been made in the new draft:
increase in the frequency range for the ‘Radiated, radio frequency electromagnetic immunity’ test to 3000 MHz (up from 2 GHz) in order to cover the widely applied 2.45 GHz frequency as for Bluetooth and microwave ovens - tests have been updated in accordance with OIML D 11: 2013 and the IEC 61000-4-3
the ‘damp heat, cyclic (condensing)’ test is a disturbance test (clause 10.3.1 in OIML R 61-2) concerning instruments installed in locations where condensation and or when the penetration of vapour is significant
the following new tests are introduced for checking the performance of battery powered instruments:
tests for “load dump” (to check the performance of the instrument under voltage spikes or battery failure), OIML R 61-2, clause 10.3.8
battery voltage variations during starting up a vehicle engine, OIML R 61-2, clause 10.3.9
the test for ‘ripple on DC mains power’ given in clause 10.3.8 of R 61-2 will check the performance of DC connected instrument under the introduction of a ripple on the DC mains voltage