Posted By Phil Rose No expert but I would have thought that a couple of key issues are: bonding avoiding differential earth There are some 'bits and pieces' on the HSE website that although not specifically about calibration may be of some help to you

Posted By Ron Hunter I've spent some time in and around Petrol Filling Stations on Trading Standards/Weights and Measures activities, often working alongside fuel pump engineers. I would suggest the risk is no greater than that to the general public. Typical controls: All metalwork equipotentially bonded and grounded, with a rigorous annual test and inspection regime of the fixed installation; overalls etc. in natural fibres and grounding (as in contact with the ground)of measuring vessels whilst filling. There is a greater risk (of electrostatic discharge) to all concerned when leaving your vehicle and closing the door, doubtful though that would have anywhere near the energy, or indeed if there would ever be sufficient fuel/air mixture, to cause a problem.

Posted By Andy Porter Hold on, maybe this link will work....! http://www.westyorksfire...onFromStaticElectric.pdf

Posted By A Campbell From past experience if as the other poster indicates, correct bonding & earthing with regular testing the likelihood of ignition from static electrical discharge is minimal. It is normally classed as a Zone 2 area with main hazard for ignition source likely to be from causing sparks/friction when using power tools and to some extent hand tools. The SPA alliance run petrol forecourt safety courses with plenty of info regarding SSoW