Microlectra Dinel ULM-70, Instruction Manual, Page: 18 / 32

18
© Dinel, s.r.o. ULM–70
You can set the sensitivity in three
degrees:
LOW – MEDIUM – HIGH.
SENSITIVITY
The setting is defined in three steps of the level meter sensitivity .
"LOW" – Low sensitivity in case of surrounding interferences affecting the measurement.
"MEDIUM" – Medium sensitivity (suitable for most applications).
"HIGH" – Enhanced sensitivity for measured media partly absorbing the ultrasonic signal
If there are no above obstacles
in the tank, it is not necessary to
start this mode.
TEACHING
The mode serves for suppressing false reflections resulting from reflection of the ultra -
sonic signal from roughnesses on walls of the tank, various partitions, mixers or other obsta -
cles. The sensor starting this mode detects false reflections and save them in the memory.
Then these false reflections will not affect the subsequent measurement (they are masked).
Before starting the mode it is necessary to empty the tank as much as possible (pref-
erably completely).
1. To enter to the menu press the same button to select "SERVICE". Then, using and
select "TEACHING".
2. Now it is shown the item "TEACHING". By pressing set the value "LEVEL DISTANCE" (dis -
tance to the level) – supposed distance from the face of the sensor to the medium level. If the
distance to the level is not precisely known, enter a value rather lower (in the tolerance field
as shown in Fig. 19).
3. After entering the "SET LEVEL DISTANCE" by pressing button the system starts "teaching"
(false reflection mapping). During the mapping, the display shows flashing sign "RUNNING".
4. The mapping of false echoes can be completed when you see the inscription "Press OK to
stop" and you press .
5. The procedure is completely finished when you can see the inscription "DONE". It is then
possible to exit the menu by repeated pressing the button .
S E N S I T I V I T Y
M E D I U M
T E A C H I N G
S E T L E V E L D I S T A N C E :
0 6 0 0 0 m m
S T A R T
M I N L E V E L
M A X L E V E L
U N I T S
D A M P I N G
S E N S I T I V I T Y
T E A C H I N G
M I N L E V E L
M A X L E V E L
U N I T S
D A M P I N G
S E N S I T I V I T Y
T E A C H I N G
T E A C H I N G
S E T L E V E L D I S T A N C E :
0 6 0 0 0 m m
R U N N I N G
T E A C H I N G
S E T L E V E L D I S T A N C E :
0 6 0 0 0 m m
D O N E
P R E S S E S C T O E X I T
The mode "TEACHING" will stop
automatically after ca. 1000 meas -
urements.
T E A C H I N G
S E T L E V E L D I S T A N C E :
0 6 0 0 0 m m
R U N N I N G
P R E S S O K T O S T O P
If during the scanning of the tank in the bottom of the display
appears the dialog "press OK to stop" (see figure) the level me -
ter already found no further obstacles and "TEACHING" mode
may be terminated. If it is not terminated, the level meter is still
ready for the possible presence of obstacles (e.g. paddles of
the agitator). Once it registers a further obstacle, the dialogue
disappears and the obstacle is erased. This process may be
repeated up to 1000 cycles. After this the "TEACHING" mode is
automatically stopped.