Endress+Hauser PROMAG 33, Operating Manual

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9 Technical Data
Application
Instrument name Flow measuring system “Promag 33”
Instrument function Flow measurement of liquids in closed piping.
Applications in measurement, control and regulation processes,
for e.g. batching and dosing (> 10 s), etc.
Function and system design
Measuring principle Electromagnetic flow measurement according to Faraday’s law
(Generation of a voltage by induction in a magnetic field).
Measuring system Instrument family “Promag 33” consisting of:
• Transmitter: Promag 33
(with a HART or a RS 485 communications module)
• Sensor: Promag A (DN 2, 4, 8, 15, 25)
Promag H (DN 25, 40, 50, 65, 80, 100)
Promag F
(DN 15...2000)
Two versions are available:
• Compact version
• Remote version (FS or FL version)
Input variables
Measured variable Flow velocity (proportional to induced voltage, measured by two
electrodes in the measuring tube)
Measuring range Measuring range of electronics within v = 0...12.5 m/s
The full scale value for the current output can be selected within
the following limits:
– Minimum full scale value at v = 0.3 m/s
– Maximum full scale value at v = 10 m/s
Operable flow range Over 1000 : 1
When the flow is pulsating, the amplifier is not overloaded above its
set full scale value even with peak velocities of 12.5 m/s.
Flow is measured between 0.01...>10 m/s at the stated accuracy.
Auxiliary input The auxiliary input is only available with a “RS 485” communications
module.
U = 3...30 V DC, R
i
= 1.8 k
Ω
, galvanically isolated
Configurable for: Positive zero return, totalizer reset, starting a batch
cycle or dual range mode.
Promag 33 9 Technical Data
Hauser 107