There is no standard recommendation. It will depend on how often it is used, the criticality of the measurement, and how much you are willing to spend on keeping the instrument in calibration. The common best practice approach is to choose a nominal re-calibration period and then check the re-calibration against the original calibration report to see how much it has drifted during that period. If it has changed more than what deems acceptable, you may shorten the frequency. If the change is a lot less, you may choose to extend it.

Yes, the display can be remotely mounted. You can contact us or our distributor in your area on what parts are needed for this conversion.

Yes, we can cater to recalibration requests of varying requirements, including multipoint calibrations. Contact us for more information.

Yes, the meter can be installed vertically but the rotor shafts must be in horizontal plane and the liquid should travel from bottom to top through the meter. Failure to mount your meter in the correct orientation will cause the weight of the rotors to bear down on the thrust bearings. The short term effects of incorrect mounting orientation will be a loss in accuracy, with long term effects ranging from reduced lifespan to fairly rapid catastrophic damage.

Yes, we have a full list of CAD files and drawings available here. If you have any other requirements for specifying the OM Series, please feel free to contact us so we can assist you.