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Handling Instructions and Precautions
Installation attitude 1: Installation on horizontal piping, the display up. (Standard installation)
Installation attitude 2: Installation on horizontal piping, the display on the right when
viewed from the flow meter IN side pipe. When using this installation
attitude, set the low flow cut parameter value to 5. Failure to do so will
cause the flow rate to be displayed (output) even when there is no fluid
flowing. The normal flow side and back flow side integral functions activate,
causing the flow rate values to be integrated.
Installation attitude
Side drawing
Direction of flow
Up
Down
Note: "FS flow rate" is the "full-scale flow rate".
Example At a pressure of 0.3 MPa when the flow meter is installed on horizontal piping
with the display facing to the right, when viewed from the flow meter IN side
pipe, causes a change in the flow rate that is no more than
1. 5% FS ±1 digit compared to the normal installation attitude.
0. 5[%FS / 0. 1MPa]×0. 3[MPa]
＝
1. 5[%FS]
Operating pressure
range
0 to 1 MPa
−0. 07 to 0 MPa
Flow rate range
5 to 100% of FS flow rate
Note
5 to 100% of FS flow rate
Instantaneous flow rate display
change amount
No more than 0.5% FS / 0. 1 MPa ±1 digit
No more than 0.5% FS / 0. 01 MPa ±1 digit
Up
Down
Direction of flow
Side drawing
Diagram viewed
from IN side pipe
Installation attitude 3: Installation on horizontal piping, the display on the left when viewed
from the flow meter IN side pipe. When using this installation attitude, set
the low flow cut parameter value to 5. Failure to do so will cause the flow
rate to be displayed (output) even when there is no fluid flowing. The
normal flow side and back flow side integral functions activate, causing the
flow rate values to be integrated.
Installation attitude 4: Installation on horizontal piping, the display down.
Do not use the flow meter in this installation attitude.
Installation attitude 5: Installation on vertical piping
Up
Down
Direction of flow
Direction of flow
Up
Down
Direction of flow
Side drawing
Diagram viewed
from IN side pipe
Up
Down
Side drawing
Direction of flow
6. When connecting piping, apply an appropriate amount of sealant. Do not apply
sealant to the first two threads of the end of the pipe. Over-application of
sealant can cause it to get inside the piping, creating the risk of measurement
error and damage to the FA Series Flow Meter.
7. If different-diameter piping, a regulator, filter, valve, or other piping equipment
is installed upstream from the FA Series Flow Meter, be sure to provide a
straight pipe section as recommended. See "Specification accuracy and
straight pipe section" for more information. Failure to provide a straight pipe
section can cause flow rate errors.
8. Connecting expansion pipe or a tube coupler without providing a straight pipe
section can produce a negative flow rate reading due to back flow in bypass
unit, even though there is normal flow as far as the product is concerned.
9. Installing the display section on horizontal piping so it is in a downward orientation
may cause rust, water droplets, oil mist, dust, or other foreign matter to adhere to the
sensor, creating the risk of measurement errors and damage to the FA Series Flow
Meter. Do not use the display section in a downward orientation.
Installing the display section on horizontal piping in a sideways orientation will cause
errors due to the effect of the attitude. For details, see "Installation Attitudes" below.
10. Do not install in locations where the effects of pulsating flow or flow
maldistribution are present, such as in the vicinity of the compressor delivery port,
on bellows piping, etc. Also, do not install in a location where a regulator or check
valve is performing hunting. Doing so creates the risk of measurement error.
Direction of wrap
Leave 2
threads
open
Leave 2
threads
open
Sealing
ta
pe
Liquid
sealant
Example At a pressure of 0. 3 MPa when the flow meter is installed on horizontal piping with the display
facing to the right when viewed from the flow meter IN side pipe, causes a change in the flow
rate that is no more than −1. 5% FS ±1 digit compared to the normal installation attitude.
−0. 5 [% FS/0. 1 MPa]×0. 3 [MPa]
＝
−1. 5 [% FS]
Operating
pressure range
0 to 1 MPa
−0. 07 to 0 MPa
Flow rate range
5 to 100% of FS flow rate
5 to 100% of FS flow rate
Instantaneous flow rate display
change amount
No more than −0.5% FS / 0. 1 MPa ±1 digit
No more than −0.5% FS / 0. 01 MPa±1 digit
