How To Achieve Higher Accuracy; How To Achieve The Full Scale Range; Pin-Point Adjustment (Selective Accuracy); Reproduction Of Precise Measuring Instruments - Flow vision FC01-Ex User Handbook Manual

Flow Meter | FC01- Ex

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 velo-
cities, however with low flow velocities there will be a high signal variation with resultant high non-
linearity. By setting the interpolation trim points in high density, the error can be kept below 1% over
wide distances of the measuring range.
Another influencing factor is the temperature difference selected. (See chap. 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,
to gether 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 the trim points are density distributed. (See chap. 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 compliance with 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 measu-
ring 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.
30
NORMAL ATMOSPHERED
Definitions and mounting instructions