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No.LFE****-OMZ0013
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Definition and Terminology
Term
Meaning
A
Accumulated flow
The total amount of fluid that has passed through the device. If an instantaneous flow of
10 L/min lasts for 5 minutes, the accumulated flow will be 10 x 5=50 L.
Accumulated pulse
output
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.
Accumulated value
hold
A function to store the cumulative flow value in the product
’s internal memory at certain
time intervals.
The time interval for memory data storage is selectable from 2 or 5 minutes.
Analogue output
Outputs a value proportional to the flow rate. When the analogue output is in the range 1
to 5V, it will vary between 1 to 5V according to the rate of flow.
The same for analogue output of 4 to -20 mA.
C
Chattering
A phenomenon of the switch output turning ON and OFF repeatedly around the set value
at high frequency due to the effect of pulsation.
Copy function
A function to copy flow rate setting values and function settings.
D
Display flow range
The range of flow rates that can be displayed to satisfy the specifications.
F
F.S. (full span /
full scale)
This means "full span" or "full scale", and indicates maximum variation width at rated
value. For example, when analogue output is 1 to 5 V, F.S.=5[V]
– 1[V]=4[V].
(Reference: 1%F.S. = 4[V] × 1% = 0.04[V])
H
Hysteresis
The difference between ON and OFF points used to prevent chattering.
Hysteresis mode
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.
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.
Internal voltage drop
Voltage reduction across an internal device when the switch output is in the ON
condition.
K
Key-lock function
Function that prevents changes to the settings of the product (disables button operation).
M
Minimum setting unit
The resolution of set and display values.
If the minimum setting unit is 1 L/min, the display will change in 1 L/min steps, e.g.
10…..11…..12 L/min.
O
Operating fluid
temperature
Range of fluid temperature that can be used by the product.
Operating
temperature range
Ambient temperature range in which the product can operate.
Summary of Contents for LFE0 Series
Page 1: ...Doc No LFE OMZ0013 Product Name Flow Monitor Model Series Product Number LFE0 SMC Corporation ...
Page 36: ... 35 No LFE OMZ0013 List of output modes for fluid temperature ...
Page 42: ... 41 No LFE OMZ0013 F20 External input This item is not used for this specification ...
Page 66: ... 65 No LFE OMZ0013 Dimensions Front protective cover Panel mount adapter R ...