Technical and instalation
manual FLOW 38 Batch Page 11 (of 49) COMAC CAL
s.r.o.
During installation, do not lift the meter by the evaluation unit housing (in case of detached design, by
the sensor terminal box), possibly under the meter's metallic housing but always use slings round the
process connection or use the lifting lugs on the flanges.
Installation position
The inductive flow sensor is installed in arbitrary position in vertical piping. In case of horizontal
piping, it is necessary to make sure that the sensor is installed with its measuring electrodes in
horizontal position. In case of the earthing electrode design, possibly with testing for empty pipeline,
then the installation is always performed with the earthing reference electrode facing down (with the
sensor terminal box, eventually with the evaluation unit facing upwards). Then the earthing reference
electrode is in the bottom position and the empty tube sensing electrode is in the top position of the
flow sensor.
Every time when the empty tube testing electrode is not covered with a
liquid for 5sec at least, the flow meter will display the "Empty tube"
status, and if it is necessary, it sends out an error message and stops
taking measurement. The measurement accuracy is maintained in this
way. Once the electrode is covered with the liquid again, the error
message disappears and the flow meter starts taking measurement
again.
Measurement error caused by incorrect mounting installation
1) correct installation (flow sensor should be install in arbitrary position in vertical piping)
EMPTY TEST – ON EMPTY TEST – OFF
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