Flow vision FC01-Ex User Handbook Manual page 77

Expansion of the characteristic curve
By following the instructions of chap. 4.2.7 an existing curve can also be expanded upward.
In application example 1, the flow velocity range shall be increased by 0.30 m/s. This means that two
additional trim points are required: at 1.95 m/s and at 2.10 m/s.
To do this, branch into menu CUSTOMER TRIM and enter old because the existing curve shall not
be deleted but rather be expanded.
Increase the number of trim points from 10 to 12. Do not change the temperature difference, leave
it at 3.3 °C!
Then assign flow velocity 2.10 m/s to trim point 12 (for userfriendliness had already been
pre-assigned with 1.82 m/s) and start the automatic calibration. After determination of the Y
value for point 12, trim point 11 is assigned to a velocity of 1.95 m/s (it had already been
pre-assigned to 1.81 m/s) and the automatic calibration is started..
All other data remain unchanged and shall be confirmed by pressing M until the end of the
CUSTOMER TRIM menu is reached.
Trim point V [m/s]
12
11
10
9
8
7
6
5
4
3
2
1
Manual entry of a characteristic curve
It is also possible to enter a custom designed curve by means of the keyboard.
This may be reasonable when several FC01-Ex flow meters are used under identical conditions
(medium, installation etc.).
To duplicate the expanded curve of example 1 on a second FC01-Ex, select the calorimetric sensor
in menu SENSOR SELECT, set its C value and enter FLUID in menu MEDIUM SELECT.
For other entries proceed as described for example 1 (Implementation).
CHARACTERISTIC
NUMBER OF TRIM POINTS
TEMPERATURE DIFFERENCE
FC01- Ex | Flow Meter
Y
2.10 35441
35396
1.95
1.80 35346
1.60 35267
1.40 35158
1.20 35063
1.00 34890
0.80 34668
0.60 34347
0.40 33846
0.20 32957
0.00 24635
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EXAMPLES
new
12
3.3
77