KROHNE BM 26 BASIC_ADVANCED Quickstart EN - Manual (Page 25)

TECHNICAL DATA
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BM 26 BASIC/ADVANCED
www.krohne.com 10/2012 - 4000346904 - QS BM 26 Basic-Adv R04 en
Fieldbus modules
Module output FOUNDATION™ Fieldbus PROFIBUS PA
Order code xF45xDxxxxx (PR) xF45xXxxxxx (PR)
Measuring system
Measuring principle A reed resistor chain that is magnetically actuated by a magnetic
float in the BM 26 measuring chamber
Primary measured value Resistance
Secondary measured value Level and volume of the liquid in the measuring chamber
Design
Description of device Resistance reed chain with 2-wire loop-powered transmitter module
attached adjacent to the measuring chamber of the bypass level
indicator. Changes in resistance are converted to an output signal via
a transmitter module.
Description of transmitter
module
Changes in resistance are
converted to signals that agree
with the FF communication
protocol.
Changes in resistance are
converted to signals that agree
with the PROFIBUS PA
communication protocol.
Options Converter position 1
Accessories SU 600 power supply unit 24 V
Display and user interface Display and user interface Display and user interface Display and user interface
Display None
Measuring accuracy
Accuracy ± 10 mm / 0.4¨ (when density is constant)
Operating conditions
Temperature Temperature Temperature Temperature
Operating temperature,
transmitter module
-40…+85°C / -40…+185°F, if there is insulation around the
measuring chamber, specify the temperature in the order. Do not put
insulation around the transmitter housing.
Pressure Pressure Pressure Pressure
Operating pressure Atmospheric pressure
Other conditions Other conditions Other conditions Other conditions
Protection category Transmitter housing without LCD indicator: IP 54
Transmitter housing with LCD indicator: IP 66
Installation conditions
Notes The analog transmitter is calibrated at the factory and attached to the
measuring chamber before delivery
Dimensions and weight Refer to the "Technical data: Dimensions and weights" section in the
Handbook
Materials
Housing Polyester-coated aluminium
Reed-chain tube Stainless steel
Clamp Stainless steel