Printed on 26/04/12 12/15 U514986-e Revision 4
5. Metrological check - Adjustment operation
5.1. Metrological check
Current DIRRECTE and LNE (Weights and Measures) legislation require :
. Metrological inspection of meter at operation start-up
. Subsequent yearly inspections.
If during gauging the meter is found to be outside the accepted error, it is possible to re-calibrate the
meter using the AB 35 calibrating mechanism. For meters using an electronic calculator, the re-calibration
is made by adjustment of the calculator correction factor (see annex 2 of document U513237 for the
RUBIS, U516318 for the l’EQUALIS L and U516703 for the EQUALIS MPC).
5.2. Adjustment procedure
A - TEST
1 - Carry out a test run at the installation's maximum rate of flow using a 500 litres gauge
2 - Note the volumes indicated on the Indicating device and on the gauge respectively
(example : 500 litres at the indicating device and 498.5 litres at the gauge)
3 - Calculate the difference indicating device reading – gauge reading
(example : 500 - 498.5 = 1.5 litres, i.e. a difference of + 3 litres for 1000 litres, = 3‰ )
B - ADJUSTMENT OPERATION
1 - Unseal and remove the cover (1)
2 - Unscrew the two screws (2)
3 - Open the cover from the bottom
4 - Carry out adjustment (see § C)
