EMA 84 Instruction Manual62 Instrument description2.1 FeaturesThe EMA 84 is a battery-operated, digital precision pressure gauge for measuringoverpressure, vacuum and differential pressure of non-aggressive gases. Operatingrange is 100 Pa to 100 kPa.Because it is robust, easy-to-use and includes an analog output, this instrument isespecially suitable for maintenance, customer service and record-keeping for heating,ventilation and air-conditioning units.At its heart is a pressure measurement capsule with a beryllium bronze membranespring, which is displaced by the pressure difference between the two chambers ofthe measurement capsule. A distance measurement system converts thisdisplacement into an electrical signal.