KROHNE BM 100A Handbook - Manual (Page 53)

Handbook BM 100 A 53
Power supply
Option 1
24 V DC / AC, +10%/-15%, Power used: 9W
Option 2 100 – 240 V AC, +10%/-15%, Power used: 9W
Process
Process temperature, flange -30 to +150°C / -22°F to 298°F, option 200°C / 392°F
See BM100 A / Ai Supplementary Instructions for Ex values.
Process pressure, standard -1 to +40 bar / -14.5 to +580 psig*
*Process pressure subject to the process temperature and the
mechanical properties of process connection
Dielectric constant ε
r
: Measurement mode and probe type limits
Direct mode
coaxial (D) ε
r
≥ 1.4
twin probes (A,B,G&L) ε
r
≥ 1.8
Level measurement
single probes (F,H&K) ε
r
≥ 2.1
Level & interface measurement Twin rod, coaxial & twin cable ε
r
(interface) >> ε
r
(level)
2
**
** The minimum layer is 100 mm / 4” and is dependant on the dielectric constant, ε
r
. This has been
determined under test conditions using water ( ε
r
=80) and oil ( ε
r
=2.4). Note that a layer less than
100 mm / 4” will result in a level reading at a constant 100 mm / 4” above the displayed interface
level, also the interface level reading will be slightly higher than the true value.
TBF mode
Level measurement
All except D & G ε
r
≥ 1.05
Human interface
KROHNE SMART and HART® protocols installed on first output.
Automatic recognition and configuration by gauge. Information
displayed via local display (integral or remote), PC or HART®
handheld communicator (HHC).
Point-to-point:
1 gauge connected to PC or HHC
Communication, standard
Multi-drop: up to 15 gauges connected to PC or HHC
RS 485 (SMART): up to 255 per junction box with PC link Fieldbus
PROFIBUS-PA: GSD file supplied with gauge.
Weight
Non-Ex/FM Housing 8 kg / 18 lb with DN50 PN10/16 flange
Ex/FM Housing 9 kg / 20.25 lb with DN50 PN10/16 flange
Single rod Ø10mm 0.62 kg/m / 0.83 lb/ft (twin rod or reverse: 1.24 kg/m / 0.83 lb/ft)
Single cable Ø4mm 0.12 kg/m / 0.08 lb/ft (twin cable Ø4mm : 0.24 kg/m /0.16 lb/ft)
Twin cable Ø6mm 0.28 kg/m / 0.19 lb/ft
Single cable Ø8mm 0.41 kg/m / 0.28 lb/ft
Coaxial Ø28mm 1.61 kg/m / 1.08 lb/ft
Standards
Electromagnetic Compatibility
Directive 89/336/EEC in conjunction with EN 61326-1(A1&A2).
EMC emissions shielding (with the exception of BM 100 As with
coaxial probes) is only guaranteed in metal tanks. Class A-
shielded as standard, class B shielding is available on demand.
Electrical equipment (low voltage)
Directive 73/23/CEE in conjunction with EN 61010-1.
ATEX
Electromagnetic Compatibility
and other protection directives
followed for EU countries
Refer to BM 100A/BM 100 Ai KEMA 01ATEX1078X
Supplementary Installation and Operating Instructions.