Specifications - NORGREN 18D-LT x2 Bedienungsanleitung

®
6 Startup and operation
Setting the switching points
The switching points are freely adjustable
in the pressure switching range. Switching
points should ideally be in the middle of the
pressure switching range. Do not use the
limit value (corresponds to the test pressure)
during operation. To set the switching points,
loosen lock screw 5. The upper and lower
switching points are set by turning adjustment
screw 4 (turn to the right for rising and to the
left for falling pressure). The adjustment value
can be checked with a manometer.
To complete the procedure, tighten lock
screw 5.
4 Adjustment screw
4
for switch point
- +
5 Lock screw
5
Putting the 18D-LT x2 into operation
Before putting the system into operation,
the following work must be performed and
completed:
• The 18D-LT x2 must be fully installed and con-
nected.
• The configuration and defaults must be set.
Putting the 18D-LT x2 into operation:
X 1. Apply operating voltage.
X 2. Vent the part of the system to which the 18D-LT
x2 is connected.
WARNING Dangerous system ope-
rating conditions from
incorrect settings on
the 18D-LT x2 or opera-
ting voltage outside the
limits.
There is a risk of inju-
ry and damage to the
system from uncontrolled
operating conditions of
the system
X Do not use any improper settings on the
18D-LT x2 prior to or during operation.
X Replace defective pressure switches immedi-
ately.
X Do not disconnect the 18D-LT x2 pressure
switch from its voltage source while it is in
operation!
08/10
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®
7 Removal and replacement
Removing the 18D-LT x2
CAUTION
X 1. Always ensure that there is neither voltage
nor pressure in the relevant part of the system.
X 2. Loosen and remove all connections.
X 3. Remove the pressure switch from the pressu-
re connection (thread connection) using a fork
spanner or pull the 18D-LT x2 straight from the
plug connection.
8 Maintenance and repair
The pressure switches require no mainte-
nance. If the devices fail or malfunction during
operation for unknown reasons, they must be
replaced.
Defective microswitches or other components
cannot be repaired or replaced.
Pressure switches that show signs of damage
must not be installed or must be replaced.
The pressure switches may not be used as
levers. If they are exposed to special types of
external stresses, additional safety measures
are required.
Example: 18D LTx2
Side A: Pressure range 0.2 to 2 bar
Side B: Pressure range 1.0 to 10 bar
.
1
P
[bar]
Signal from
switch
A (2)
Signal from
switch
B (3)
Subject to change without notice / Page 3
The system is under high
pressure. There is a risk
of injury and damage
to the system from
uncontrolled operating
conditions of the system.
In the part of the system
in which the 18D-LT
x2 is installed there
must be no live voltage
or pressure before
commencing removal.
2
Side A
3
Side B
10
Adjustable hysteresis
with falling pressure
2
1
0
1
0
9

Specifications

The specifications are found in the correspon-
ding data sheet 5.11.006.
Applies to all pressure switches of the series
18D-LT x2.
Pneumatic connection:
G1/4 inside or ¼ NPT, flange
Storage temperature:
-20° C to +85° C
Environmental temperature:
–40° C to +85° C;
Medium temperature:
–40° C to +85° C
Temperature at the switching element:
–40° C to +85° C
Medium:
for inert, gaseous and liquid, non-flammable
gases (40 μm grade filtered compressed air
fineness)
Pressure switch ranges:
0.2 to 2 bar; 0.5 to 8 bar; 1.0 to 10 bar; 1.0
to 16 bar.
Installation position :
any
Shock and vibration resistant as per
EN 61373, Category 1, Class A and B
Electrical connection:
DIN EN 175301-803 (DIN 43650) Form A
Overpressure safety:
26 bar
Switch element functions:
microswitch (change-over contact)
Safety class:
(DIN EN 60 529/09.2000)
IP65, with installed connector plug
Material:
Housing, aluminium
Seals: EPDM; VMC (silicone)
10 Disposal
Dispose of packaging and used parts as
required by the regulations in the
country of use.
Hysteresis B = 1.0 bar
9.0
Adjustable hysteresis
with rising pressure
1,55
Hysteresis A=0.45 bar
t
t
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