Camlogic PFG-LP Installatie en onderhoud
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S.n.c. di Guazzetti Giovanni & C.
COSTRUZIONI MECCANICHE ELETTRICHE
Installation and Maintenance Rules for:
PFG-LP float level gauges for liquids
PFG-LP - PFG-LP-C
STANDARD FEATURES
The float level gauge PFG-LP is made in compliance with the regulations in
force in the European Union and specifically with:
-
Die-cast aluminium casing UNI 5076. IP65 protection.
-
Parts in contact with the products are made of stainless steel.
-
Use contact capacity:
-
Operating temperature:
-
Maximum working pressure:
-
PFG-LP
standard.
-
PFG-LP-C
with curved float.
SAFETY RULES
All the appropriate safety precautions must be taken when electrically operated equipment is used, in order to reduce
the risk of fire outbreaks, electric shock and injuries to persons.
- Keep the work zone clean and orderly. Accidents are more likely to occur in untidy areas and environments.
- Before beginning work, make sure that the level gauge is in a perfect condition. Damaged or broken parts must be
repaired or replaced by competent personnel authorized by the Manufacturer.
- All verifications, inspections, cleaning and maintenance operations, part changes and replacement must be carried
out with the level gauge disconnected.
- It is absolutely forbidden for children, unauthorized and/or inexpert persons to touch or use the level gauge.
- Make sure that the earthing is efficiently connected when the instrument is installed.
- Periodically check to be sure that the cable is in a perfect condition and replace it if is damaged. This operation must
only be carried out by competent and authorized persons. Only use extension cables of the permitted type and marked.
- Protect the cable against high temperatures, lubricants and sharp edges. Do not twist or knot the cable.
- Do not allow children or unauthorized persons to touch the cable.
DESCRIPTION
PFG-LP is a float level gauge used to detected the level of liquids in tanks.
Its operates by means of a float centered to the fixed support on the flange of the gauge. The float moves as the level
of the liquid increases and this movement is transmitted to a microswitch housed in the body of the gauge, causing
its electric contact to change status.
The instrument consist of a die-cast aluminium casing housing a precision microswitch and a rocker device controlled
by magnetic induction that activates the microswitch. This casing is enbloc with the flange that fixes the instrument
which in turn supports the float that tests the liquid.
The centering articulation of the float is protected by an elastic casing in
Neoprene which prevents sticky substances from accumulating within the
articulation itself, since this could hamper its movement.
All parts in contact with the liquid ( flange, articulation and float ) are made
of stainless steel to prevent problems if the treated liquid is aggressive.
OPERATION
When it is not operating, the float assumes a negatively slanting position of
about 10° in relation to its horizontal axis.
As the level of the liquid rises, the float is influenced by the movement
and shifts from its initial position until it slants positively by about 10° in
relation to its horizontal axis ( Fig.1 ).
This movement is transmitted by magnetic induction by the magnet fixed to
the float, to the rocker device in the body of the instrument which activates
the microswitch.
There is no more or less protected passage between the liquid in the
tank and the interior part of the level gauge since magnetic induction is
transmitted to a lowered part of the stainless steel flange, thus guaranteing
100% impermeability. The microswitch is a switch contact type.
INSTALLATION
The gauge is mounted on the external wall of the tank by means of a counterflange sized as shown in the drawing
( see REFERENCE FIGURES ).
The horizontal axis of the float must be perpendicular to the tank wall, thus parallel to the surface of the still liquid.
Equipped with a float with a curved stem, gauge PFG-LP-C can be mounted on tank walls slanting 45° at most,
since the curved stem achieves optimum operating conditions just as through the float was parallel to the surface
of the liquid ( Fig.2 ).
R
Via dell'Industria 12 - 12/A - 42025 CAVRIAGO - RE - Italy
Tel.: 0522/942641 - 0522/941172
www.camlogic.it
10 A at 250 V.AC.
from -20 to +120 °C.
25 bar.
e-mail: [email protected]
Production Year 0000
FLOAT LEVEL GAUGE
Via dell'Industria 12 - 42025 CAVRIAGO RE - Italy
Max. temperature inside storage bin 100°C
II 2GD Ex d IIB T4 Ex tD A21 IP65 T135°C - TÜV 08 ATEX 362388 X
Ex d IIB T4 Gb - Ex tD A21 IIIC T135°C Db Ip65 - IECEx QAR TUN 08.0033
PFG-LP
Ambient temperature range -10 to +100°C
Fig.1
00956 19.10 - Rev. 00