Leakage Air Characteristic For Fmr (Leaktune) - Burkert 8750 Quick Start Manual

11.5 Leakage air characteristic for FMR
(LeakTune)
The function LEAK.TUNE enables leakage air compensation which
increases the precision of the fluid flow rate control.
Background: When bulk material is conveyed, leakage air occurs on
a rotary valve depending on the pressure. The air flow through the
controller unit is divided into this leakage air and into the air flow in
the conveyor line.
Q = Q + Q
FMR Leakage air
To obtain leakage air compensation, a leakage air characteristic must
be read in once when the conveyor line is closed.
11.5.1 Recording and reading in leakage air
characteristic
To determine the leakage air precisely, the system should be started
up in normal operation. In doing so, observe the following:
• The conveyor line behind the component, which causes the
leakage air, must be closed.
• Material must not be conveyed.
32
Conveyor line
english
Typ 8750
Start-up24VDC
NOTE!
If bulk material is conveyed pneumatically using a rotary
valve, ensure that
▶ the conveyor line behind the rotary valve is closed.
▶ the rotary valve is empty and is running at nominal speed.
▶ Measures for sealing the system (e.g. sealing air which flows
down into the rotary valve) are implemented.
▶ the compressor is switched on.
Starting program for automatically recording the leakage air
characteristic:
→
Select the menu LEAK.TUNE .
ENTER
SETUP
F.CONTROL
→
Press the key for 3 seconds.
MENU RUN
The leakage air characteristic will now be automatically recorded
and read in.
Display Description
Countdown 5–0 Countdown from 5 to 0 to start determining
the leakage air
Teach-in at work See program sequence (the individual steps
are not shown on the display)
TUNE err/break Cancel by pressing "STOP"
TUNE ready The leakage air characteristic was successfully
determined.
ENTER
LEAK-CHAR
LEAK.TUNE
SELEC