SITRANS F M MAGFLO
Electromagnetic flowmeter
type MAG 5100 W
Siemens Flow Instruments SITRANS F M MAGFLO
sensor and a transmitter. These instructions only describe the sensor installation. For further
information on the transmitter installation, please refer to the SITRANS F M MAGFLO
Reading and operating the flowmeter is possible under almost any installation conditions
because the display can be oriented in relation
to the sensor. To ensure optimum flow measurement attention should be paid to the following:
The sensor must always be completely full with
liquid.
Therefore avoid:
• Installation at the highest point in the pipe
system
• Installation in vertical pipes with free outlet
For partially filled pipes or pipes with downward
flow and free outlet the flowmeter should be
located in a U-tube.
Installation in vertical pipes
Recommended flow direction: upwards. This
minimizes the effect on the measurement of
any gas/air bubbles in the liquid.
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SITRANS F M MAGFLO
Electromagnetic flowmeter type MAG 5100 W
Installation, general
(continued)
Installation in horizontal pipes
The sensor must be mounted as shown in the
upper figure. Do not mount the sensor as shown
in the lower figure. This will position the electrodes at the top where there is possibility for air
bubbles and at the bottom where there is possibility for mud, sludge, sand etc.
If using empty pipe detection the sensor can be
tilted 45°, as shown in the upper figure.
Measuring abrasive liquids and liquids containing particles
Recommended installation is in a vertical/inclined pipe to minimize the wear and deposits
in the sensor.
Inlet and outlet conditions
To achieve accurate flow measurement it is
essential to have straight lengths of inlet and
outlet pipes and a certain distance between
pumps and valves.
It is also important to centre the flowmeter in
relation to pipe flanges and gaskets.
Installation in large pipes
The flowmeter can be installed between two
reducers (e.g. DIN 28545). Assuming that at 8°
the following pressure drop curve applies. The
curves are applicable to water.
Example:
A flow velocity of 3 m/s (V) in a sensor with a
diameter reduction from DN 100 to DN 80
= 0.8) gives a pressure drop of 2.9 mbar.
(d
1/d2
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SITRANS F M MAGFLO
Electromagnetic flowmeter type MAG 5100 W
Potential equalisationPotential equalisation is carried out with the
Cathodic protected
piping
With earthing electrodes
built-in earthing electrodes.
Special attention must be given to systems with
cathodic protection.
By compact mounting:
The transmitter must be supplied through an
isolation transformer. The terminal "PE" must
never be connected.
By remote mounting:
The screen must only be connected at the
sensor end via a 1.5 µF condensator. The
screen must never be connected at both ends.
By isolated sensor:
If above mentioned connections are unacceptable the sensor must be isolated from the pipe
work.
5
SITRANS F M MAGFLO
Electromagnetic flowmeter type MAG 5100 W
Maximum allowable
torques
Standard bolts must be well lubricated and tightened evenly around the gasket. Leakage/damage to the flowmeter or piping may arise if bolts
are overtightened.
1. Responsibility for the choice of lining and electrode materials with regard to their abrasion and
corrosion resistance lies with the purchaser; the effect of any change in process medium during
the operating life of the flowmeter should be taken into account. Incorrect selection of lining
and/or electrode materials could lead to a failure of the flowmeter.
2. Stresses and loading caused by earthquakes, traffic, high winds and fire damage not taken
into account during flowmeter design.
3. Do not install flowmeter such that it acts as a focus for pipeline stresses. External loadings not
taken into account during flowmeter design.
4. During operation do not exceed the pressure and/or temperature ratings indicated on the data
label or in the installation instructions.
5. It is recommended that all installations should include an appropriate safety valve and
adequate means for draining/venting.
6. Under the Pressure Equipment Directive this product is a pressure accessory, and not
approved for use as a safety accessory, as defined by the Pressure Equipment Directive.
7. Removal of the terminal box except by Siemens Flow Instruments or their approved agents will
invalidate the PED conformity of the product.
In accordance with the Pressure Equipment Directive (97/23/EC).
We have checked the contents of this manual for agreement with the hardware and
software described. Since deviations cannot be precluded entirely, we cannot guarantee
full agreement. However, the data in this manual are reviewed regularly and any
necessary corrections included in subsequent editions. Suggestions for improvement
are always welcomed.
Technical data subject to change without prior notice.
Siemens Flow Instruments A/S
Nordborgvej 81
8
DK-6430 Nordborg
The reproduction, transmission or use of this document or its contents is not permitted without
express written authority.
Offenders will be liable for damages. All rights, including rights created by patent grant or
registration of a utility model or design, are reserved.
SITRANS F M MAGFLO
Magnetisch-induktiver Durchflussmesser
Typ MAG 5100 W
Siemens Flow Instruments SITRANS F M MAGFLO
bestehen aus einem Messaufnehmer und einem Messumformer. Diese Instruktion beschreibt nur
die Montage des Messaufnehmers. Für weitere Informationen über die Montage des Messumformers,
siehe bitte das SITRANS F M MAGFLO