10.3 Using the differential pressure regulator
In order to enable faster response times with low measuring distances or completely sealed measur-
ing nozzles, a differential pressure regulator (LRLL-1/8-QS-6) can be used instead of the vent screw.
The valve function enables the pressure to be exhausted significantly quicker than via the vent screw.
Connecting and checking the differential pressure regulator
1. Remove the vent screw (SW 14).
2. Mount the differential pressure regulator (LRLL-1/8-QS-6) n the connection for the vent screw
(è Fig.6).
3. Press the CLEAN pushbutton (CLEAN = OFF) and then the SENSE pushbutton (SENSE = ON) on the
control module.
4. Make sure that there is not an object in the area of the measuring nozzles .
5. Turn the adjusting screw on the differential pressure regulator clockwise (towards LOW) until air
stops flowing from the differential pressure regulator.
6. Turn the adjusting screw on the differential pressure regulator anticlockwise (towards HIGH) until
air starts to flow from the differential pressure regulator.
Checking the settings of the differential pressure regulator
1. Seal the measuring nozzle (e.g.workpiece inserted).
2. Press the CLEAN key (CLEAN = OFF) on the control module.
Ä
Sensor module is supplied with operating pressure. [SUP.P] is displayed.
3. Press and hold the SENSE pushbutton (SENSE = ON) on the control module until [SUP.P] is no
longer displayed.
4. If the delay ([SUP.P] in the display) is too great, reduce the time by turning the control valve
(towards HIGH).
11 Maintenance and Care
1. Switch off the energy sources (operating voltage, compressed air).
2. Clean sensor with non-abrasive cleaning agents.
12 Malfunctions
12.1 Error messages
Indication
on display
Event code
[hex]
G
1)
E
2)
S
3)
Error Remedy
[Er01] 0x5000 4 3 4 Sensor module defective Replace sensor module
[Er14] 0x180E 2 2 1 Supply pressure (InC) out-
side the measuring range
(> 2bar, > 0.2 MPa); signal
cannot be evaluated
Observe the measuring
range
è 15.1 Technical data,
general.
Maintenance and Care
46 Festo — SOPA — 2020-04
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