9N°: 999341_EN_DVR 2pro/12.07.2017Introduction1.2.4 Abbreviationsabs. absoluteATM Atmospheric pressuredi (di) Interior diameterDAkkS accreditation institute:Deutsche Akkreditierungsstelle GmbHDN Nominal diameterGF Glass fiber reinforcedGK Glass pelletsGr. SizehPa Pressure unit, Hectopascal (1 hPa = 1 mbar =0.75 Torr)KF Small flangemax Maximum valuembar Pressure unit, millibar (1 mbar = 1 hPa = 0.75 Torr)min Minimum valuePA PolyamidePBT Polybutylene terephthalatePP PolypropylenePPS Polyphenylene sulphidePTFE PolytetrafluorethyleneRMA‑N° Return Merchandise Authorization numberSec. Second(s)Torr Pressure unit (1 Torr = 1.33 mbar = 1.33 hPa)1.2.5 Term definitionDVR 2pro Fully electronic vacuum gauge for measurementwithin the measuring range of atmospheric pres‑sure and 1 mbar, with digital and analogue pres‑sure reading.DVR 3pro Functions like DVR 2pro, including ATEX approvalUsedAbbreviationsProduct specificterms