SMC Networks PF3W5 Series, Руководство по эксплуатации

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-15-
No.PF
※※
-OMN0010-J
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Definition and terminology
Terms Meaning
A
Analogue output
Outputs a value proportional to the flow rate. When the analogue output is in the range
1 to 5 V, it will vary between 1 to 5 V according to the rate of flow. The same for
analogue output of 4 to 20 mA.
Attachment A metal part at both sides of the product to connect piping.
C
Cavitation
A phenomenon that may occur in a fluid moving at high speed. In the parts of the fluid
where the pressure is low, vapour bubbles form and then rapidly collapse. If cavitation
is present for a prolonged period, exposed surfaces will be damaged; this is called
cavitation damage or erosion.
F
F.S.
(Full span, Full scale)
Stands for "full span" or "full scale", and indicates varied display valve and analogue
output range at rated value. For example, when analogue output is 1 to 5 V, F.S. = 5[V]
- 1[V] = 4[V], (ref. 1%F.S. = 4[V] x 1% = 0.04[V])
FLOW indicator
Used to determine the flow rate status visually. The higher the flow rate, the faster the
flashing speed will be. (It may display an error.)
Fluid temperature Range of fluid temperature that can be measured by the product.
I
Instantaneous flow
The flow passing per unit of time. If it is 10 L/min, there is a flow of 10 L passing through
the device in 1 minute.
K
Karman vortex
When an object is placed in a fluid stream, a vortex will be created in the fluid on the
downstream side. This vortex is called a Karman vortex. The frequency at which the
vortices are generated is proportional to the fluid velocity, therefore it is possible to
calculate the fluid flow rate by measuring the Karman vortex frequency.
M
Measured fluid The fluid(s) that the product can measure.
O
Operating pressure
range
Pressure range in which product is operable.
Operating temp. range Ambient temperature range in which product is operable.
P
Part in contact with
fluid (wetted part)
A part that comes into physical contact with the fluid.
POWER indicator
Used to confirm the power supply status. It turns on when the power supply is applied.
(It may display the output specification)
Pressure
characteristics Indicates the change in the display value and analogue output when fluid pressure
changes.
Proof pressure Burst pressure at which the product is electrically or mechanically damaged.
R
Rated flow range The flow range within which the product will meet all published specifications.
Rated pressure range The pressure range that satisfies the specifications.
Repeatability
Reproducibility of the display or analogue output value, when the measured quantity is
repeatedly increased and decreased.
Response time Time from when the target flow is applied until the flow reaches 90% of the set value.
T
Temperature
characteristics Indicates the change in the display value and analogue output caused by ambient
temperature changes.
U
Union Fitting which is connected to the vinyl chloride piping (tube piping).
W
Water hammer
A pressure surge occurring when a moving fluid is forced to stop or change direction
suddenly. Water hammer often occurs when a valve is closed suddenly, and a pressure
wave propagates in the pipe.