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17.3.2 Lack of magnetic field
Disassemble the float as indicated in section point 17.1. Check if the float has suffered
chemical attack and if so the permanent magnet has been affected. If this is the case, the
float must be replaced and the flowmeter will have to be re-calibrated at Tecfluid S.A.
facilities.
17.3.3 Damaged calibrated orifice and/or float
Check that they do not show any impacts or scratches. Also check for any chemical attack.
If the float is in bad condition it must be replaced. If the calibrated orifice is damaged, the
metering tube and the float must be replaced. In both cases the flowmeter has to be re-
calibrated at Tecfluid S.A. facilities.
17.4
Potential problems with the indicator housing
17.4.1 The indicator pointer rubs on the reading scale
To remove the cover (6), remove the four screws M4 at the corners of the indicator housing.
Rubbing normally happens if the meter has been hit or dropped. Simply straighten the
pointer (2) by bending it slightly until it is separated between 2-3 mm from the reading scale
surface (5)
17.4.2 Deviation of the zero on the scale
When the indicator pointer (2) does not point zero in its rest position, place the flowmeter in
its real working position on top of a non-magnetic table. If when the float is moved the
pointer moves but does not return to 0, check that the pointer hub (3) is firmly attached to
the pointer shaft (1). If it is not, secure the pointer hub (3) onto the conical tip (1) of the shaft
by tapping it lightly and carefully.
If the pointer hub is fixed, make the indicator pointer coincide with the 0 on the scale using
the frontal adjusting screw (4) on the indicator pointer. Make sure that the shaft (1) is held
fast so as not to be bent or damaged
Check that there is no rubbing between the pointer movement system and the cables
connected to a limit switch or transmitter.
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