KROHNE BM 26 A EN - Manual (Page 38)

38 Installation and Operating Instructions BM 26 A
7 Technical data
7.1 Technical data: BM 26 A
Instrument type
BM 26 A
Measuring range
Standard 0.3 … 6 m / 1 … 20 ft
Accuracy ± 10 mm / ± 0.4” of measured value
Min. product density 0.5 kg/l … 3.0 kg/l / 31.2 … 187 lb/ft 3
Viscosity ≤ 5000 mPa.s / 3.360 lb/ft.s
Max. allowable operating
pressure at 20°C / 70°F* 40 bar / 580 psig (information on higher
pressure levels available on request)
Indicator
Standard linear indicator with cm/m graduation
Optional linear scale with inch/feet, % or volume
graduation, as required; flap indicator without
scale; flap indicator with scale in cm/m,
inch/feet, % or volume graduation, as required
Mounting position vertical
Protection (indicator) to EN 60529 IP 68 (equivalent to NEMA 6)
Pressure vessel approvals Pressure equipment directive 97/23/EC.
Electromagnetic compatibility (EMC) to EN 50081-1, EN 50082-2 & EN61326 (1+2)
Process temperature
Standard, with flap or bar indicator -40°C…+200°C or -40…+390°F
Optional, non- Ex -200°C … +300°C / -325 … +570°F *,**
Other approvals
ATEX
INERIS 02ATEX0088 X ATEX II 1/2 G or ATEX II 1 G
EEx d ia IIC T3 … T6 or EEx d IIC T3 … T6 ;
EEx ia IIC T3 … T6
ATEX applications: special conditions for safe use
BM 26 A Bypass Level Indicator for all options
Temperature class*** Process temperature
Ambient temperature range
T6 T(fluid) <= 70°C / 158°F -40 to +60°C / -40 to +140°F
T5 T(fluid) <= 95°C / 203°F -40 to +50°C / -40 to +122°F
T4 T(fluid) <= 130°C / 266°F -40 to +50°C / -40 to +122°F
T3 T(fluid) <= 195°C / 383°F -40 to +40°C / -40 to +104°F
* dependent on material, flange pressure rating and float pressure resistance
** higher on request
*** the temperature category of the BM 26 A depends on the options fitted to the
indicator, the ambient temperature and the process temperature