Function And Features; Operating Principle / Fast Changes In Flow Velocity - IFM Electronic Efector 300 Bedienungsanleitung

1. Function and features

The flow monitor monitors liquid media. It senses whether a preset
flow value has been reached or not and provides a switching signal.
The unit is optimised for fast reaction to rapid changes in flow veloci-
ty.
• An LED display indicates the relative flow value (referred to the
minimum and maximum flow values).
• It is also possible to indicate: Switching status, excess flow, under-
flow, and flow standstill.
• Adjustment to maximum flow (HI-Flow) and minimum flow / flow
standstill (LO-Flow) via setting button or programming wire.
The unit
• can be used as N.O. (
• and operates with hysteresis function.

Operating principle / fast changes in flow velocity

maximum flow
switch point (SP)
trigger point (TP)
minimum flow
OUT
OUT
When the flow rises, the output switches when the trigger point (TP)
has been reached.
When the flow falls again, the output switches back when the value
"SP - hysteresis" has been reached.
If SP is not reached within a short time*, the output switches back
immediately.
(*approx. 1s; depends on the application and the and the operating range of
the sensor).
20
flow
1
0
1
0
) or N.C. ( )
hysteresis
t