DESCRIPTION OF FUNCTIONS
www.schmalz.com
EN | 33
6.2.1.4
Measurement of air consumption
The actual air consumption of a suction cycle is calculated taking the system pressure and nozzle size
into account.
The process data can be used to notified the ejector of the actual system pressure. If this is
not available, the system operates with the optimum system pressure.
6.2.1.5
Measurement of leakage
The leakage (represented as the vacuum drop per time unit in mbar/s) after the control function
interrupts the suction because switching point H1 was reached is measured.
6.2.1.6
Measurement of dynamic pressure
This measures the system vacuum achieved during unobstructed suction. The duration of the
measurement is approx. 1 second. Therefore, to evaluate a valid dynamic pressure, uninterrupted
suction is required for at least 1 second after starting the suction, i.e. the suction point must not be
covered by a part.
Measured values below 5 mbar or above the switching point H1 are not regarded as valid dynamic
pressure measurements and are rejected. The result of the last valid measurement is retained.
Measured values above the switching point (H2 - h2) but simultaneously lower than switching point H1
result in a condition monitoring event.
6.2.1.7
Maximum vacuum
In each suction cycle, the maximum system vacuum level reached is determined and made available
as an ISDU parameter.
Vacuum
mbar
H1
H1-h1
H2
H2-h2
Vacuum On
t
0
t
1
time
s
