INF-TN1FSH-E
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4.4.1. Measurement method and sensor
(Measurement method, sensor mount, sensor type, sensor constant, transmission voltage)
Description
Measurement method and sensor data required for measurement can be set as follows. If the sensor mount or the type
of sensor is changed, the sensor spacing in “4.4.2. Pipe specifications” is also changed.
CAUTION
Be sure to make the following parameter setting before mounting the sensors to the pipe. Mount the sensors,
observing the specified sensor spacing.
•
If sensors are mounted not by strictly observing the sensor spacing, measurement error increases.
•
Or receive wave error may result.
•
Select the sensor constant of the applicable unit as sensor constant value. Otherwise the measurement
error may increase.
Enter data for each item (see the following table) according to the display.
Item
Input method
Range or menu
Measurement method
Selection
HYBRID, TRANSIT TIME
Sensor mount
Selection
V METHOD, Z METHOD
Sensor type
Selection
FLW11, FLW41, FLW12, FLD12, FLD22, FLW32, FLW50,
FLW51, FSW12, FSW21, FSW40, FSW50
Sensor constant
Line #-F: METAL PIPE
Line #-R: METAL PIPE
Line #-F: PLASTIC PIPE
Line #-R: PLASTIC PIPE
(#: Line No.)
Numeric value
Numeric value
Numeric value
Numeric value
0.00% to 300.00%
0.00% to 300.00%
0.00% to 300.00%
0.00% to 300.00%
Transmission voltage
Selection
20 Vpp, 40 Vpp, 80 Vpp, 160 Vpp
*1) If hybrid is selected as measurement method, select sensor type from “FSW12, FSW21, FSW40, and FSW50.” If
hybrid method is selected, sensor type can be selected only from “FSW12, FSW21, FSW40, and FSW50.”
*2) In sensor constant, set the sensor constant calculated based on actual current calibration performed as part of the
delivery test at the factory. Set the sensor constant for each of the sensor units mounted to the pipe. The sensor
constant appears as the DF value marked on the nameplate of the sensor unit. The setting need not be changed
normally. (Make the setting when the detector or the flow transmitter is replaced.)
▪
It appears as the DF-P value on the nameplate of the sensor unit if the sensor is mounted on a plastic pipe.
▪
It appears as the DF-M value on the nameplate of the sensor unit if the sensor is mounted on a metal pipe.
Pipe
material
Plastic Pipe
PVC, FRP, PEEK, PVDF, Acrylic, Others
Metal Pipe
Carbon steal, Stainless steel, Copper, Cast iron, Aluminium, Ductile iron
Refer to “1.3. Checking type and specifications” for sensor unit.
*3) The following table lists the sensor constant value for each measurement method. Each sensor constant value
applies to the sensors in the following figure.
Measurement method
Sensor constant of line 1
Sensor constant of line 2
Pulse Doppler
Line 1-F: Forward-direction sensor
(Sensor
1)
Line 1-R: Reverse-direction sensor
(Sensor
2)
Line 2-F: Forward-direction sensor
(Sensor
3)
Line 2-R: Reverse-direction sensor
(Sensor
4)
Time transit
Line 1-P: Sensor pair
Line 2-P: Sensor pair
* The sensor constant value for line 2 need not be set in 1-path measurement mode.
* The sensor constant value need not be set in transit time measurement mode in general. Leave the setting to 100.0%.
