Technical data

Flow Meter FC01-Ex Flow Meter FC01-Ex
24 Normal atmosphere - Definitions and mounting instructions 24 Normal atmosphere - Definitions and mounting instructions
3.3.3 How to achieve higher accuracy
As a result of the relevant physical properties and the characteristics of the monitoring head, any
variations of control variables will be very small and nearly linear in the event of high flow velocities,
whereas with low flow velocities there will be a high signal variation with resultant high non-
linearity. By setting the interpolation trim points close enough, the error can be kept below 1% over
wide distances of the measuring range.
Another influence is that of the temperature difference selected.- See section 4.2.1)
3.3.4 How to achieve the full scale range
As the trim points can be optionally distributed in a fixed sequence on the characteristic curve,
together with the appropriate selection of the sensor temperature, that part of the curve which
is most important for the application can be given a particularly high resolution.
Note:
❑ The accuracy is a function of how close the trim points are distributed. (See section 9 -
Examples).
3.3.5 Pin-point adjustment (selective accuracy)
If one or several flow values (e.g. flow limits, cooling power limit etc.) are particularly important for
the system, they can be assigned to one trim point each to achieve a high degree of dependability
and accuracy in meeting the control criteria.
3.3.6. Reproduction of precise measuring instruments
The customer calibrated (-Ex) version of the FC01 allows the user to reproduce expensive measur-
ing instrument data in his characteristic curve. Thus expensive measuring instruments need only be
purchased once, if at all.
3.3.7 Use of standard monitoring heads
(separate heads for gases and liquids)
Monitoring heads are not freely interchangeable with the FC01-Ex, i.e. in the event of a failure
the complete pair monitoring head/electronic control unit must be replaced.
3.3.3 How to achieve higher accuracy
As a result of the relevant physical properties and the characteristics of the monitoring head, any
variations of control variables will be very small and nearly linear in the event of high flow velocities,
whereas with low flow velocities there will be a high signal variation with resultant high non-
linearity. By setting the interpolation trim points close enough, the error can be kept below 1% over
wide distances of the measuring range.
Another influence is that of the temperature difference selected.- See section 4.2.1)
3.3.4 How to achieve the full scale range
As the trim points can be optionally distributed in a fixed sequence on the characteristic curve,
together with the appropriate selection of the sensor temperature, that part of the curve which
is most important for the application can be given a particularly high resolution.
Note:
❑ The accuracy is a function of how close the trim points are distributed. (See section 9 -
Examples).
3.3.5 Pin-point adjustment (selective accuracy)
If one or several flow values (e.g. flow limits, cooling power limit etc.) are particularly important for
the system, they can be assigned to one trim point each to achieve a high degree of dependability
and accuracy in meeting the control criteria.
3.3.6. Reproduction of precise measuring instruments
The customer calibrated (-Ex) version of the FC01 allows the user to reproduce expensive measur-
ing instrument data in his characteristic curve. Thus expensive measuring instruments need only be
purchased once, if at all.
3.3.7 Use of standard monitoring heads
(separate heads for gases and liquids)
Monitoring heads are not freely interchangeable with the FC01-Ex, i.e. in the event of a failure
the complete pair monitoring head/electronic control unit must be replaced.