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■Definition and terminology
Terminology
A
Accumulated flow
Accumulated flow external
reset
Accumulated pulse output
Accumulated value hold
Analogue output
C
Chattering
D
Delay time
Display flow range
Digital filter
F
F.S. (Full span, Full scale)
H
Hysteresis
Hysteresis mode
I
Instantaneous flow
Internal voltage drop
K
Key-lock function
The total amount of fluid that has passed through the device. If an instantaneous
flow of 10 L/min continues for 5 minutes, the accumulated flow will be 5 x 10 = 50 L.
A function to reset the accumulated flow to "0" when an external signal is input.
A type of output where a pulse is generated every time a predefined accumulated
flow passes. It is possible to calculate the total accumulated flow by counting the
pulses.
A function to store the accumulated flow value in the internal memory. The flow
value will be stored at a set time interval of either 2 or 5 minutes. When the power
supply is turned on, the stored accumulated flow value will be displayed and
accumulated flow will continue from that point.
A type of variable output that has a value proportional to the measured quantity.
When the analogue output is in the range of 1 to 5 V or 4 to 20 mA, it will vary
continuously, following the change of flow.
The problem of the switch output turning ON and OFF repeatedly around the set
value at high frequency due to the effect of pulsation.
The setting time from when the flow applied to the flow switch reaches the set
value, to when the ON-OFF output actually begins working.
Delay time setting can prevent the output from chattering.
The response time indicates when the set value is 90% in relation to the step input.
The range which can be displayed by the product with a digital display.
Function to add digital filtering to the fluctuation of flow value. Smooth the
fluctuation of displayed value for sharp start up or fall of the flow.
When the function is valid, digital filtering is reflected to the ON/OFF of the switch
output.
Output chattering or flicker in the measurement mode display can be reduced by
setting the digital filter.
Stands for "full span" or "full scale", and indicates varied 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])
The maximum measuring range or change in analogue output over the maximum
measurement range.
The difference between ON and OFF points used to prevent chattering. Hysteresis
can be effective in avoiding the effects of pulsation.
Mode where the switch output will turn ON when the flow is greater than the set
value, and will turn OFF when the flow falls below the set value by the amount of
hysteresis or more.
The volume of flow per unit of time. If it is 10 L/min, there is a flow of 10 L passing
through the device in 1 minute.
The voltage drop across the product (and therefore not applied to the load), when
the switch output is ON. The voltage drop will vary with load current, and ideally
should be 0 V.
A function that locks the set buttons so that no accidental setting changes can be
made.
-15-
Definition
No.PF※※-OMZ0002
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