Mutec MF3000 Ex, Руководство по обслуживанию

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11/2018
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The split between welding branch and pipe wall has to be closed by a weld seam after fixing the flow
sensor flange vertical and in a 90° angle to the pipe axis.
The quality of the welding seam can be checked by a following pressure test. For boring out the pipe
wall for the necessary measuring window, an 18mm drill is needed. The welding branch which has been
welded on before can be used as drilling jig. After the drilling, the hole has to be deburred thoroughly,
to avoid material deposits at the sensor.
In a vertical pipe the flange will be placed horizontal and also in the 90° angle to the pipe axis.
Flow Sensor Mounting
Before screwing in the flow sensor into the welding branch, the total depth of welding branch and pipe
thickness should be marked at the shaft of the flow sensor.
The measuring window shall be mounted flush with the pipe wall so that it doesn't reach into the pipe.
The screwing of the flow sensor into the welding branch occurs up to the marked line. The use of Teflon
ribbon is recommended for the better insulation. The polarization axis indicated on the type plate is
aligned in parallel to the pipe axis. A firm attracting of the jam nut (wrench size 32) on the thread shaft
fixes the flow sensor permanently.
Fig. 11
Electrical connection and wiring
The DIN-rail transmitter MFI3000 always should be installed in a switch cabinet or dry room and it has
to be supplied with 24V AC/DC. The electrical connection between the flow sensor and the transmitter
has to be executed as a 4-wire cable. For wire lengths up to 60 m a wire cross-section of 0,75mm² is
sufficient. Beyond this it is necessary to apply > 1,0 mm² proportionally to wire length. A standard
shielded cable can be used.
NOTE
For an easy ground point connection, a PE-connection (M4 threaded bolt) is available
at the housing.
WARNING
The flow sensor must not be opened when energized!