BTU Meters

Measuring accuracyClass 2 or 3 (EN 1434)Environment classA (EN 1434) for indoor installationMechanical classM1 *)Electromagnetic classE1 *)*) according to 2014/32/EU Directive on Measuring InstrumentsAmbient humidity< 93 % rel. humidity at 25°C,without condensationMax. height2000 m above sea levelStorage temperature-20 … 60 °C Electronic unitAmbient temperature5 … 55°CHousing protection ratingIP 54 according to EN 60529Safety classLine 110 / 230 V ACII according to EN 61558Line 24 V ACDCIII according to EN 61558Operation threshold f.  T0.2 KTemperature difference  T3 K … 120 KTemperature measurement range0 ... 180°CLCD7 digitOptical interfaceStandard, EN 62056-21CommunicationOptional, e. g. M-BusSeparabilityAlways, optional cable length Temperature sensorTypePt 500 or Pt 100According to EN 60751Temperature range0 ... 150°C(up to 45 mm overall length)0 ... 180°C(from 100 mm overall length) Volume measurement unitProtection classIP 54 / IP 65 / IP 68 according to EN 60529According to EN 60529Mounting placeHot side / cold sideInstallation positionAnyFlow straighteningNoneMeasuring range1:100Temperature range5 … 130°CNational type approvals may be differ-ent.Recommended......heating application10 … 130°C...cooling application5 … 50°CMaximum overload2,8 × qpNominal pressurePN16 (PS16), PN25 (PS25)