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Table Of Contents
39
Common Precautions for the D6F Series
Safety Precautions
● Sensor Applications
The D6F is built for use with general-purpose devices. In particu-
lar, when using the D6F for applications with the safety require-
ments described below, take steps to ensure system and device
safety through measures such as fail-safe designs, redundant
designs, and regular inspections.
•Safety devices for ensuring safety for persons
•Transportation equipment control (such as applications to
stop operation)
•Aviation and space equipment
•Nuclear power equipment
Do not use the D6F for applications in which D6F operation
would directly affect human life.
● Fluids, Pipe Mounting and Sensor Installation
All D6F Models
(1)
Use clean fluids. Install a filter or mist separator on the
inflow pipe. Failure to do so may result in malfunction or
changes in characteristics due to dust or mist. This does not
apply to the D6F-W, D6F-V, D6F-P and D6F-PH.
(2)
Do not use corrosive gases other than the specified applica-
ble fluids (such as chlorine, sulfur, acid,or alkali) . Doing so
may cause product failure.
(3)
The specified performance may not be obtained if the D6F is
used for fluids other than the specified applicable fluids.
(4)
After removing the Sensor from the package, do not allow
foreign particles to enter the piping. Foreign particles in the
piping may cause product failure.
(5)
Install the sensor so that the fluid flows in the direction indi-
cated by the arrow on the Sensor. Correct measurements
cannot be obtained if the fluid flows in the wrong direction.
This does not apply to the D6F-V, D6F-P and D6F-PH.
(6)
It is recommended that the Sensor (except for the D6F-A3)
be mounted horizontally. If it is not mounted horizontally, an
error of ±1% FS or higher may result.
(7)
Install the Sensor on a flat surface. Incorrect installation may
damage the Sensor and make it impossible to obtain correct
measurements.
(8)
Make sure that the power to all equipment is turned OFF
before you install the Sensor. Installing the Sensor while the
power supply is ON may result in electrical shock or abnor-
mal operation.
(9)
Always check operation after installation.
(10)
Do not drop the Sensor or disassemble the cover.
D6F-A1
(1)
Make sure that pipes with bamboo joints are airtight. Correct
measurements cannot be obtained if there is leakage from
joints.
(2)
Use M3 panhead screws to install the Sensor, and tighten
them to a maximum torque of 0.59 N•m.
D6F-N2/-L2
(1)
Use the Rc 1/4 tapped threads for the pipes, and tighten the
threads to a maximum torque of 5 N•m. Tightening beyond
this value may result in fractures, which can cause leaks.
Apply a suitable amount of pipe sealer. Do not apply sealer
on the first two threads from the end of the threaded section.
When you tighten the pipes, do not allow foreign matter or
oil on the joint area.
(2)
Use M3 panhead screws to install the Sensor, and tighten
them to a maximum torque of 0.59 N•m.
D6F-A3
(1)
When installing the pipes, use M5 screws for the joints and
tighten to a torque of 1.5 N•m maximum. Use sealing tape to
make the joints airtight. Incorrect installation may make it
impossible to obtain correct measurements.
(2)
It is recommended that the Sensor be mounted either hori-
zontally or vertically. Mounting the Sensor at an angle may
make it impossible to obtain correct measurements.
(3)
Use M3 panhead screws to install the Sensor, and tighten
them to a maximum torque of 0.59 N•m.
D6F-A5
(1)
Use M3 panhead screws to install the Sensor, and tighten
them to a maximum torque of 0.59 N•m.
(2)
Install O-rings to seal the fluid inlet and outlet points. The
recommended O-ring is JIS B 2401, nominal number P5.
D6F-A6
(1)
Use the appropriate threads (R1/4, NPT1/8 or NPT1/2) for
the pipes, and tighten the pipes to a maximum torque of 5
N•m. Tightening beyond this value may result in fractures,
which can cause leaks. When you tighten the pipes, do not
allow foreign matter or oil on the joint area. Use a spanner or
adjustable wrench to turn the connecting section (aluminum
alloy) and connect the pipe. Do not place the spanner or
wrench on the Sensor (PPS). Doing so may damage the
Sensor or result in leaks. Apply a suitable amount of pipe
sealer. Do not apply sealer on the first two threads from the
end of the threaded section. When you tighten the pipes, do
not allow foreign matter or oil on the joint area.
(2)
Use M3 panhead screws to install the Sensor, and tighten
them to a maximum torque of 0.59 N•m.
Precautions for Correct Use
INLET
OUTLET
O-ring
Installation Example