Endress+Hauser Proline Promag 55S, Техническая информация

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Proline Promag 55S
Hauser 3
Function and system design
Measuring principle Faraday’s law of induction states that a voltage is induced in a conductor moving in a magnetic field.
In electromagnetic measuring, the flowing medium corresponds to the moving conductor. The induced voltage
is proportional to the flow velocity and is detected by two measuring electrodes and transmitted to the ampli-
fier. Flow volume is computed on the basis of the pipe’s diameter. The constant magnetic field is generated by
a switched direct current of alternating polarity.
A0003191
Ue = B · L · v
Q = A · v
Ue induced voltage
B magnetic induction (magnetic field)
L electrode gap
v flow velocity
Q volume flow
A pipe cross-section
I current strength
Measuring system The flow measuring system consists of the following components:
• Promag 55 transmitter
• Promag S sensor (DN 15 to 600 / ½ to 24")
Two versions are available:
• Compact version: Transmitter and sensor form a single mechanical unit.
• Remote version: Transmitter and sensor are installed separately.
Measurement of solids flow rates
In combination with a density meter, e.g. with "Gammapilot M" from Hauser, Promag 55S also
determines the throughput of solids in mass, volume or percentage rates.
The following order specifications are required for this: order option for software function "Solids content flow"
(F-CHIP) and order option for a current input.
A0006118
Solids content flow measurement (m) with the aid of a density and flow measuring device. If the solid density (
ρ
S
) and the
density of the carrier liquid (
ρ
C
) are also known, they can be used to calculate the solids flow.
1 Flow measuring device (Promag 55S)
→
volume flow (V). The solid density (
ρ
S
) and the density of the transport
liquid (
ρ
C
) must be entered in the transmitter.
2 Density measuring device (e.g. "Gammapilot M")
→
total fluid density (
ρ
M
) (transport liquid and solids)
Ue
I
I
B
L
V
r
C
r
S
1
2
r
M
m
V