Manual
VEK MNE1 / VEK MNE2
FEIG ELECTRONIC GmbH
09/2015
15
G
B
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Typically, the sensitivity setting is adjusted in large steps with the response threshold selected to be no high-
er than 640.
In applications where it is necessary to distinguish between vehicles, values of settings higher than 640 and
fine adjustments can be utilized. A large loop (e.g. 10.0 m x 2.5 m) permits selective detection of busses
when the threshold value is set correspondingly high (> 1000).
11.2 Hysteresis, Off Threshold
To avoid the busy signal dropping out from time to time, i.e. when vehicles with a high base are utilized as
articulated buses, trams, trucks with trailers, etc., it is possible to change the switching hysteresis. Uninter-
rupted detection of critical vehicles is then possible even at low sensitivity.
Loop state with 25% of drop-out threshold
Drop-out threshold
25%
Drop-out threshold 75%
Response threshold
Loop state with 75% of drop-out threshold
Detuning by vehicle
free
occupied
free
occupied
t
The service program displays the calculated off threshold that results based on the selected response
threshold and the percentage hysteresis.
DIP
USB
Description
20%
Lowest off threshold 20% of response threshold value (boost)
:
75%
(factory setting)
:
80%
Highest off threshold 80% of the response threshold
Examples:
Response threshold 160 (step medium-low)
Hysteresis 75%
off threshold: 0.75 * 160 = 120
Hysteresis 20%
off threshold: 0.20 * 160 = 32
The hysteresis settings for the off threshold can only be changed in the service program!
