(1)Selection from 5 types according to applications
Fluid temperature (°C)
200
High-temperature
sensor
100
80
Small
diameter
sensor
0
–40
1350100200400
Middle sensor
(2) Shape of each sensor
FLD41
Small
sensor
(standard)
Pipe size (mm)
Middle sensor
1200
Large
sensor
6000
Large type (2pcs)
(Type: FLD51)
Middle type (2pcs)
(Type: FLD41)
Small type (standard)
(Type: FLD12)
(3) Example of sensors mounted on pipe
Cloth belt
2
Piping
Element holder
Small diameter
(Type: FLD22)
Exclusive cable
High-temperature
(Type: FLD32)
ECNO: 622
2. CONDITIONS OF DETECTOR MOUNTING POSITIONS
• The piping must be filled with fluid which is free from air bubbles and foreign objects.
• Straight piping greater than 10D must exist on the upstream side and greater than 5D
on the downstream side.
• Elements (pump, valve, etc) on the upstream side must be greater than 30D away to
prevent disturbances.
(1)Necessary straight pipe length
Classification For upstream side For downstream side
90° bend
Tee
Diffuser
Reducer
More than 10D
More than
More than
10D
0.5D
More than
Detector
10D
D
Valves
Pump
ECNO: 622
Flow control valve exists on upstream side.
Stop valve
Check valve
P
Flow control valve exists on downstream side.
3
2. CONDITIONS OF DETECTOR MOUNTING POSITIONS
(2) Detector mounting considerations
1) For horizontal piping, the detector should be mounted within ±45° from the water level.
For vertical piping, the detector can be mounted in any external position.
Piping
°
45
Horizon
°
45
2) Avoid mounting the detector at positions with piping distortion, flange or welds.
Welds
Detector
Flange or welds
Welds
Detector
No goodNo goodGood
4
ECNO: 622
3. MEASURABLE FLUID
Item
Measurable fluid
Fluid
turbidity
Ultrasonic propagative homogeneous fluids (water, seawater, oil or fluid even
with unknown sonic speed), including the following liquids.
Enter the piping specifications in the parameter of the converter to determine the sensor mounting
dimension and then mount the sensor on the piping.
Loosen the lock nut and slide the sensor so as to
(1)
meet the specified mounting dimension (by
rounding off the displayed mounting dimension
value of the converter below the decimal point),
and then tighten the nut.
Apply the attached silicone grease to the
(2)
transmitting surface of the sensor. Spread the
compound over the entire area.
Element holder
BNC connector
Scale
Lock nut
Cursor
Frame
Saddle
Mounting dimension
(L)
Element holder
Cloth belt
Transmitting
surface
Keep the sensor retracted by turning the element
holder counterclockwise.
After cleaning the surface of the pipe, the sensor
should be mounted.
Fix both ends (saddles) of the sensor to the pipe
(3)
by the attached cloth belts. Mounting will be
facilitated by winding the cloth belts on the pipe in
advance.
Cloth belts are usable at 80°C or lower.
If above 80°C, stainless steel belts should be
used.
ECNO: 622
Element holder
Exclusive cable
(4)
Make sure the sensor is mounted in parallel with
the pipe axis and the mounting dimension is
correct. Then, turn the element holder clockwise
until the sensor comes in close contact with
the pipe.
Stop turning the element holder when it tightens
as the transmitting surface comes in contact with
the pipe surface. Be careful not to tighten the
holder excessively.
7
6. OPERATION
Be sure to read the following items and record (check) the next page before
using the flowmeter. Read these data together with the instruction manual.
(1) Make sure that the inside diameter of the piping being measured comforms to the
(2) Check the lengths of the straight pipe upstream and downstream of the sensor mount-
ing position.
•
Straight piping greater than 10D must exist on the upstream side and greater than 5D on the
downstream side.
•
Elements (pump, valve, etc) on the upstream side must be greater than 30D away to prevent
disturbances.
(3) Check if the piping setting (outside diameter , material, thic kness , etc.) is correct.
•
If the sensor mounting size is not calculated correctly, errors will occur such as window scan
(reception range-over) or no received signal.
(4) Check if the sensor is mounted correctly.
•
If the transmission side of the sensor is not coated sufficiently with silicone grease, receiving
signals will become unstable or errors will occur such as window scans (receiving range-over),
no received signals, etc.
•
If the upstream and downstream side connectors are reversed, a negative flow rate will be
indicated.
(5) Make sure that the zero point adjustment is completed.
•
Fill the piping with measuring fluid, then stop the flow of the fluid to perform a manual zero
adjustment.
(6) Check to see if more than 2 indicators on the upper right of the measurement screen
are working to indicate wave reception.
•
If no indicator is displayed, or if only one is displayed, increase the level of the transmission
voltage.
(7) Check if the analog output range is set correctly.
•
Even when the analog output is not used, an error of analog scale-over will occur unless the
analog output range has been set properly.
* Preparations for measurement have been completed.
Set the integrator, logger, printer, etc., as necessary. Check whether the flow rate is indicated
correctly. If an error message is indicated, display the system check screen and press the
ENT key while setting the cursor on the error checker.
At this time, the error data, the cause of the error and procedures to correct the error are
indicated. Operate the flowmeter according to the instructions.
8
ECNO: 622
6. OPERATION
Be sure to record (check) the following items before using the flowmeter.
Date of recording [ day month year]Place of measurement ______________________
Recorded by ___________________________________________________________________
(1) Check the inside diameter of the piping to insure it conforms to the sensor type.
DetectorType(Mark on sensor in use) Piping inside diameter
Small diameter sensorFLD22
Small sensor (standard)FLD12
Middle sensorFLD41
Large sensorFLD51
High-temperature sensorFLD32
(2) Check for sufficient lengths of straight pipe upstream and downstream of the sensor