AD_DK32_34_II2G_R03_en_422303_PRT.
AD_DK32_34_II2G_R03_en_422303_PRT.book Page 2 Monday, November 12, 2012 9:18 AM CONTENTS DK32 DK34 1 Safety instructions 1.1 1.2 1.3 1.4 3 General notes ................................................................................................................... 3 EC conformity ................................................................................................................... 3 Approval according to the IECEx scheme .................................................................
Safety instructions AD_DK32_34_II2G_R03_en_422303_PRT.book Page 3 Monday, November 12, 2012 9:18 AM SAFETY INSTRUCTIONS 1 DK32 DK34 1.1 General notes These additional instructions apply to explosion-protected versions of variable area flowmeters with electrical built-ins and the marking II 2 G. They complement the Installation and Operation Instructions for the non-explosion protected versions.
Device description AD_DK32_34_II2G_R03_en_422303_PRT.book Page 4 Monday, November 12, 2012 9:18 AM 2 DEVICE DESCRIPTION DK32 DK34 2.1 Device description Variable area flowmeters measure and display the volume flow of flammable and nonflammable gases and liquids. The display houses one or two separately adjustable electrical limit switches. 2.
AD_DK32_34_II2G_R03_en_422303_PRT.book Page 5 Monday, November 12, 2012 9:18 AM DEVICE DESCRIPTION 2 DK32 DK34 2.4 Flammable products Atmospheric conditions: An explosive atmosphere is a mixture of air and flammable gases, vapours, mists or dusts under atmospheric conditions. The following values define it Tatm = -20...+60°C / -4...+140°F and Patm = 0.8...1.1 bar. Outside of this range, no key data are available as to ignition behaviour for most mixtures.
AD_DK32_34_II2G_R03_en_422303_PRT.book Page 6 Monday, November 12, 2012 9:18 AM 2 DEVICE DESCRIPTION DK32 DK34 2.7 Ambient temperature / temperature classes Due to the influence of the product temperature, variable area flowmeters with built-in electrical equipment (electric variants) are not assigned to any fixed temperature class. The temperature class of these devices is rather a function of the product temperature and ambient temperature that is present and the specific device version.
AD_DK32_34_II2G_R03_en_422303_PRT.book Page 7 Monday, November 12, 2012 9:18 AM DEVICE DESCRIPTION 2 DK32 DK34 2.8 Electrical data The electronic signal output may only be connected to intrinsically safe circuits. Depending on the instrument design, the following maximum values apply per circuit: Design DK3./../.././..
Installation AD_DK32_34_II2G_R03_en_422303_PRT.book Page 8 Monday, November 12, 2012 9:18 AM 3 INSTALLATION DK32 DK34 3.1 Installation Installation and setup must be carried out according to the applicable installation installation standards (e.g. EN 60079-14) by qualified personnel trained in explosion protection. The information given in the Installation and Operation Instructions and the Supplementary Installation and Operation Instructions must always be observed.
Electrical connections AD_DK32_34_II2G_R03_en_422303_PRT.book Page 9 Monday, November 12, 2012 9:18 AM ELECTRICAL CONNECTIONS 4 DK32 DK34 4.1 General notes For version DK3./../../S/../A-Ex (plug), the separate intrinsically safe signal circuits with level of protection "ia" or "ib" are electrically connected in the terminal compartment of the plug housing and for version DK3./../../L/../A-Ex (connecting cable) it is the connecting cable as illustrated in the connection diagram.
AD_DK32_34_II2G_R03_en_422303_PRT.book Page 10 Monday, November 12, 2012 9:18 AM 4 ELECTRICAL CONNECTIONS DK32 DK34 4.2 Earthing and equipotential bonding If the device is not sufficiently electrostatically grounded via the process cables, an additional earth connection must be established using the earth screw 1. The position of the ground terminal is illustrated below.
Operation AD_DK32_34_II2G_R03_en_422303_PRT.book Page 11 Monday, November 12, 2012 9:18 AM OPERATION 5 DK32 DK34 5.1 Start-up Start-up is only permitted when the variable area flowmeter: • is correctly installed in the system and connected. • has been checked for the proper state with regard to its installation and connection requirements. The user of the system must have it checked before start-up in compliance with the national regulations for checks before startup. 5.
Service AD_DK32_34_II2G_R03_en_422303_PRT.book Page 12 Monday, November 12, 2012 9:18 AM 6 SERVICE DK32 DK34 6.1 Maintenance Maintenance work of a safety-relevant nature within the meaning of explosion protection may only be carried out by the manufacturer, his authorised representative or under the supervision of authorised inspectors. For systems in hazardous areas, regular tests are required in order to maintain the proper condition.
Notes AD_DK32_34_II2G_R03_en_422303_PRT.book Page 13 Monday, November 12, 2012 9:18 AM NOTES 7 DK32 DK34 11/2012 - 4000422303 AD DK32/34 II2G R03 en www.krohne.
AD_DK32_34_II2G_R03_en_422303_PRT.book Page 14 Monday, November 12, 2012 9:18 AM 7 NOTES 14 DK32 DK34 www.krohne.
AD_DK32_34_II2G_R03_en_422303_PRT.book Page 15 Monday, November 12, 2012 9:18 AM NOTES 7 DK32 DK34 11/2012 - 4000422303 AD DK32/34 II2G R03 en www.krohne.
AD_DK32_34_II2G_R03_en_422303_PRT.book Page 16 Monday, November 12, 2012 9:18 AM © KROHNE 11/2012 - 4000422303 AD DK32/34 II2G R03 en - Subject to change without notice.
