The CalMaster2 suite comprises 2 elements (CalMaster IRIS and CheckMaster). CalMaster IRIS (Intelligent Recognition Information System) is used to verify in situ mains and battery-powered flowmeter systems. CheckMaster is a field validation device that checks whether a metering system has been installed correctly and is functioning properly. Both devices are stand-alone, battery-powered with IP65-protection and can be used where a PC or laptop is not available or suitable. Up to 100 tests can be stored before data needs to be downloaded.