KROHNE CORIMASS G-MFM 4085 EN - Manual (Page 21)

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The connection on the transducer end is done for both versions over a special connector. On
the fixed version the connection on the converter side is fixed. The second option uses a
junction box for the connection. Wiring is done according to the following figure. PG 16 or ¾”
NPT adaptor are available with the junction box version to put the cable into flexible conduit.
3. Start-up
3.1 Factory Set Parameters
The mass flow meter leaves the factory ready to be used. All process data has been
programmed according to the customer order. See factory programming sheet delivered with
the flow meter.
When no process details were supplied at the time of order, the mass flow meter is programmed
to a standard default set of values and functions.
The current and pulse outputs treat all flows as positive. The actual flow and quantity is thereby
measured independent of the flow direction. The indicator will indicate a ” – ” or ” + ” in front of
the flow rate.
These factory-set settings for current and pulse may cause an error under the following
conditions: When the pump is stopped and a reverse flow is present, which is larger than the
low flow cut-off or when totalizing should be indicated for both flow directions.
To avoid these possible problems:
a) Set flow mode (Fct. 3.1.8) to either flow > 0 or Flow < 0, so that reverse flows are ignored.
or
b) Increase Low Flow cut-off (Fct. 3.1.7) so that small reverse flows are ignored.
or
c) Set the alarm output (Fct. 3.5.1) to DIRECTION so that external equipment can differentiate
between positive and negative flows.