Technical data

Flow Meter FC01-Ex Flow Meter FC01-Ex
36 Operation 36 Operation
5.1.1.4.2 Old curve / New curve
If the inquiry about the CHARACTERISTIC of the curve is answered by new, the selected trim
points are assigned to default data (see 3.2.5).
If a filed curve needs to be corrected or expanded, the above inquiry should be answered by old.
In that case, the trim points already stored will not be affected.
This menu option does not apply if a custom designed curve has not yet been entered.
5.1.1.4.3 Number of trim points
The number of trim points NUMBER OF TRIM POINTS can be selected between 2 and 20 (see
para. 4.2.2).
5.1.1.4.4 Determining the temperature differential
The TEMPERATURE DIFFERENCE setpoint can be set at 3 °C ≤Δϑ≤ 15 °C. The limit condi-
tions defined in para. 4.2.1 shall be observed.
5.1.1.4.5 Automatic calibration
After the TEMPERATURE DIFFERENCE has been determined, the TRIM POINT with the highest
number will appear when the first adjustment is made. It corresponds to the number of trim
points selected (TRIM POINT. . ).
The highest flow velocity shall be assigned to that trim point. The flow velocity can be set
between 0.00 m/s and 90.00 m/s.
Before starting the automatic calibration by simultaneously pressing ▲ UP and ▼ DOWN, the
flow velocity at which the trim point shall be determined must have been available at the sensor
for more than 10 seconds.
The heating period required by the measuring procedure is started before the first trim point is
set. The remaining heat-up time is displayed in seconds (REST TIME . . sec. ).
Once the heat-up period is over, the FC01-Ex will start the setting routine for the set flow velocity.
The calibration time is 20 seconds.
Note:
❑ Both flow and medium temperature shall be kept constant during that period as otherwise
the heating power cannot be correctly determined.
The display will therefore indicate index quantity xd = ..... for constant flow. During the calibra-
tion time of 20 seconds, that quantity should be between -0.10 and +0.10.
Upon completion of the calibration, the program will return to menu option TRIM POINT . . with
the heating power determined.
The integer value determined will be flashing on the display.
After confirmation, a selection menu is inserted allowing the calibration of the next, same or pre-
vious trim point (not with the first trim point).
When the next trim point is selected, the trim point number is reduced by one. The trim point is
again assigned to a flow velocity, and the automatic calibration is started.
This procedure is repeated until the last trim point (TRIM POINT 01) has been calibrated.
The customer designed characteristic curve has now been established and entered.
5.1.1.4.2 Old curve / New curve
If the inquiry about the CHARACTERISTIC of the curve is answered by new, the selected trim
points are assigned to default data (see 3.2.5).
If a filed curve needs to be corrected or expanded, the above inquiry should be answered by old.
In that case, the trim points already stored will not be affected.
This menu option does not apply if a custom designed curve has not yet been entered.
5.1.1.4.3 Number of trim points
The number of trim points NUMBER OF TRIM POINTS can be selected between 2 and 20 (see
para. 4.2.2).
5.1.1.4.4 Determining the temperature differential
The TEMPERATURE DIFFERENCE setpoint can be set at 3 °C ≤Δϑ≤ 15 °C. The limit condi-
tions defined in para. 4.2.1 shall be observed.
5.1.1.4.5 Automatic calibration
After the TEMPERATURE DIFFERENCE has been determined, the TRIM POINT with the highest
number will appear when the first adjustment is made. It corresponds to the number of trim
points selected (TRIM POINT. . ).
The highest flow velocity shall be assigned to that trim point. The flow velocity can be set
between 0.00 m/s and 90.00 m/s.
Before starting the automatic calibration by simultaneously pressing ▲ UP and ▼ DOWN, the
flow velocity at which the trim point shall be determined must have been available at the sensor
for more than 10 seconds.
The heating period required by the measuring procedure is started before the first trim point is
set. The remaining heat-up time is displayed in seconds (REST TIME . . sec. ).
Once the heat-up period is over, the FC01-Ex will start the setting routine for the set flow velocity.
The calibration time is 20 seconds.
Note:
❑ Both flow and medium temperature shall be kept constant during that period as otherwise
the heating power cannot be correctly determined.
The display will therefore indicate index quantity xd = ..... for constant flow. During the calibra-
tion time of 20 seconds, that quantity should be between -0.10 and +0.10.
Upon completion of the calibration, the program will return to menu option TRIM POINT . . with
the heating power determined.
The integer value determined will be flashing on the display.
After confirmation, a selection menu is inserted allowing the calibration of the next, same or pre-
vious trim point (not with the first trim point).
When the next trim point is selected, the trim point number is reduced by one. The trim point is
again assigned to a flow velocity, and the automatic calibration is started.
This procedure is repeated until the last trim point (TRIM POINT 01) has been calibrated.
The customer designed characteristic curve has now been established and entered.