Tecfluid SC250H - Manual (Page 7)

7
6.2 Indicator housing
If operating anomalies are detected with the meter, the following points should be
checked. If necessary disassemble the front cover which is held by four M5 Allen screws
(5) and plastic washers (6) for the hermetic seal, at the back of the indicator housing.
6.2.1 The indicator needle rubs on the reading scale
This normally happens if the meter has been hit or dropped. Simply straighten it out by
bending it slightly until it is separated by between 2-3 mm from the reading scale surface
(4)
6.2.2 Zero scale deviation
When the indicator needle (1) is not indicating the zero of the scale and there is no flow
rate, the meter should be placed in its real working position on top of a NON-MAGNETIC
table. If when the float is moved the needle moves but does not return to 0, check that the
needle hub (3)
is firmly attached to the pointer shaft (2). If it isn’t, secure the needle hub
(3) onto the conical tip (2) of the shaft by tapping it lightly and carefully.
This may have happened during haulage or through the meter being dropped. Make the
indicator needle coincide with 0 using the front adjusting screw (7) on the indicator needle,
screw to left or right wherever convenient. Make sure that the shaft (2) is held fast so as
not to be bent or damaged.
Check that there is no rubbing between the needle movement system and limit switches
or transmitter connecting cables.
This way the flowmeter will be properly adjusted to give correct readings.