Page 71
EN
7.3.4 Monitoring functions
The following functions are available for moni-
toring the lubrication system:
Fill level monitoring
Pressure build-up monitoring
Pressure reduction monitoring
Monitoring signal cables for
cable breakage and monitoring valves and
piston detectors
Monitoring outputs for short circuit
Monitoring power consumption of the
pump motor
Monitoring the temperature in the
pump unit
7.3.4.1 Fill level monitoring
Depending on the unit design, either mechani-
cal or capacitive sensors are used to monitor
the ill level in the lubricant reservoir. On units
with ill level monitoring, a mechanical sensor
monitors whether the ill level falls below the
"min." mark (approx. 300 g remaining for NLGI
Grade 2 grease). A second, optional sensor
can be used to generate a pre-warning so the
operator is prompted to top up in time.
The sensor sends a signal to the control unit if
the lubricant level reaches the "min" mark. The
control unit then generates a fault notiication
(see Chapter 15).
7.3.4.2 Pressure build-up monitoring
(single-line systems)
The pressure switch monitors whether the re-
quired pressure buildup occurs in the lubrica-
tion line during the pump cycle time. A signal is
sent to the control unit when the set pressure
is reached. The signal from the pressure switch
can be used to control the pump cycle time. If
the pressure in the lines reaches the speciied
value within a certain time (pump cycle time),
the pump will continue to be operated for a
certain time (delay time) and then switched off,
or the lubrication zone will be closed and the
relief procedure initiated.
If the pressure in the lubrication line does not
reach the speciied value within the pump
cycle time, this is considered an operational
malfunction. The operational sequence will be
stopped and a fault notiication will be gener
-
ated (see also Chapter 15).
7. Functional description in single-line systems
KF
G
C
Содержание KFG
Страница 115: ......
