MANUAL
Fat Level Sensor KVF-F
PROCESS AUTOMATION
ISO9001
Fat Level Sensor KVF-F
With regard to the supply of products, the current issue of the following document is applicable:
The General Terms of Delivery for Products and Services of the Electrical Industry, published by
the Central Association of the Electrical Industry (Zentralverband Elektrotechnik und
Elektroindustrie (ZVEI) e.V.) in its most recent version as well as the supplementary clause:
"Expanded reservation of proprietorship"
Fat Level Sensor KVF-F
EN
Contents
1 Safety................................................................................... 2
1.1 General safety instructions ...........................................................................2
1.2 Used Symbols...............................................................................................2
1.3 Declaration of Conformity .............................................................................3
1.4 Intended Use ................................................................................................3
1.5 Delivery, Transport and Storage ...................................................................4
1.6 Installation and Commissioning ....................................................................4
1.7 Maintenance.................................................................................................4
1.8 Repair...........................................................................................................4
1.9 Disposal........................................................................................................5
1.10 Applied Standards and Directives.................................................................5
2 Product Specifications ...................................................... 6
2.1 Function........................................................................................................6
2.2 Product Program...........................................................................................6
2.3 Design and Dimensions................................................................................7
3 Installation .......................................................................... 8
3.1 Mounting of the Sensors...............................................................................8
3.2 Mounting the KVF-F Fat Level Sensor........................................................10
3.3 Connection of the Sensor ...........................................................................12
4 Operation .......................................................................... 13
4.1 Emptying (Disposal) of the Container .........................................................13
5 Maintenance and Repair.................................................. 14
5.1 Function Testing .........................................................................................14
6 Troubleshooting ............................................................... 15
6.1 Sensor Maintenance...................................................................................15
7 Technical Specifications ................................................. 16
7.1 Fat Level Sensor KVF-F..............................................................................16
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Safety
1Safety
1.1 General safety instructions
Responsibility for planning, assembly, commissioning, operation, maintenance,
and dismounting lies with the system operator.
Installation and commissioning of all devices must be performed by a trained
professional only.
Protection of operating personnel and the system is not ensured if the product is
not used in accordance with its intended purpose.
Laws and regulations applicable to the usage or the intended purpose must be
observed. The devices are only approved for appropriate and intended use.
Ignoring these instructions will void any warranty and absolve the manufacturer
from any liability.
The Declaration of Conformity, Certificate of Compliance, Statement of
Conformity, EC-type-examination certificate and data sheets are an integral part
of this document.
The data sheet contains the electrical data of the Declaration of Conformity, the
Certificate of Compliance and the EC-type-examination certificate.
The documents mentioned are available from http://www.pepperl-fuchs.com or
contact your local Pepperl+Fuchs representative.
1.2 Used Symbols
Safety-relevant Symbols
Danger!
This symbol indicates an imminent danger.
Non-observance will result in personal injury or death.
Warni ng!
This symbol indicates a possible fault or danger.
Non-observance may cause personal injury or serious property damage.
Caution!
This symbol indicates a possible fault.
Non-observance could interrupt devices and any connected facilities or systems,
or result in their complete failure.
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ISO9001
Safety
Informative Symbols
Note!
This symbol brings important information to your attention.
Action
This symbol indicates a paragraph with instructions.
1.3 Declaration of Conformity
All products were developed and manufactured under observance of the
applicable European standards and guidelines.
Note!
A Declaration of Conformity can be requested from the manufacturer.
The product manufacturer, Pepperl+Fuchs GmbH, 68307 Mannheim, has a
certified quality assurance system that conforms to ISO 9001.
1.4 Intended Use
The fat level sensor KVF-F (referred to as "sensor" in the following sections) is a
suspended sensor for monitoring fat layer thickness in grease interceptors.
The sensor must always be connected to an warning device of type NVD-111
(see product program).
1.4.1 Marking
Fat Level Sensor
Pepperl+Fuchs GmbH
Lilienthalstrasse 200, 68307 Mannheim, Germany
KVF-F
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Safety
1.5 Delivery, Transport and Storage
Check the packaging and contents for damage.
Check if you have received every item and if the items received are the ones you
ordered.
Keep the original packaging. Always store and transport the device in the original
packaging.
Always store the device in a clean and dry environment. The permitted storage
temperature (see data sheet) must be considered.
1.6 Installation and Commissioning
1.6.1 Installation of the Sensor
The sensor and warning device must be free of voltage during installation and
maintenance. The warning device must only be connected to the supply voltage
after complete mounting and connection of the sensors.
The sensor has IP68 protection and is weather- and oil/fat-resistant. It can
therefore be installed in grease interceptors.
When installing the device in oil/petrol separators, observe the permissible
ambient temperature in the range from -20 °C ... 60 °C (253 K ... 333 K).
1.6.2 Sensor Cable
Sensor cables must not be installed in cable or conductor bundles together with
other current circuits. Avoid installing sensor cables parallel to other cables that
may transmit interfering signals, which impair the sensor signal and thus the
alarm function. The sensor itself must not be grounded.
If you extend the sensor cable, observe the applicable specifications with regard
to color, quality and durability. Use unshielded cables.
1.7 Maintenance
For operation of grease interceptors, there may be standards, directives or laws
that define regular system or sensor tests. Check the operation of the sensor at
least twice a year and more frequently in the event of unfavorable environmental
conditions.
When the grease interceptor is being emptied (disposal), the sensor must always
be washed and dried. The sensor must not be cleaned with caustic fluids. A badly
contaminated sensor can trip a wrong alarm or, in certain circumstances, fail to
trip an alarm.
1.8 Repair
The devices must not be repaired, changed or manipulated.
If there is a defect, the product must always be replaced with an original device.
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Safety
1.9 Disposal
Disposal of devices and their packaging material must be performed in
compliance with the applicable laws and guidelines of the corresponding country.
The devices do not contain batteries which need to be disposed of separately
from the products.
1.10 Applied Standards and Directives
EN 61000-6-4:2007
EN 61326-1:2013
EMC Directive 2004/108/EC
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Product Specifications
2 Product Specifications
2.1 Function
The sensor has an integrated electronic circuit which, via an oscillator circuit,
emits a weak HF signal that changes depending on whether the sensor element
is surrounded by water or fat.
The sensor is mounted suspended and immersed in liquid.
The sensor can distinguish between water and floating fat, oil and grease (FOG).
2.2 Product Program
Warni ng devic e
Description Type code
Warning device, 230 V AC NVD-111
Sensors
Description Type code
Fat level sensor, for detecting fat layer thickness in an
aqueous emulsion with small lumps of fat or a hardened layer
of fat
Fat level sensor, for detecting fat layer thickness in a liquid
layer of fat
Overflow sensor, for detecting excessively high liquid level KVF-O
FAU-104
KVF-F
Accessories
Description Type code
Cable connector IP68 for one sensor LAL-SK2
Mounting set for one sensor NVO5-B
Installation housing with DIN mounting rail NVO5-KV
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3
1
6
4
5
2
138
25
300
Ø31.6
Product Specifications
2.3 Design and Dimensions
Fat level sensor KVF-F
Figure 2.1
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1 Lower section with laser marking
2 Middle section
3 Upper section
4 Cable
5 Shrink tubing
6 Switching point
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Installation
3 Installation
3.1 Mounting of the Sensors
Read the chapter on Safety and, in particular, the section on Installation and
Commissioning (see chapter 1.6) before mounting the sensor. Do not remove the
identification plate.
Warni ng!
Risk of short circuit
Injuries and damage to the device are possible when working with live parts.
n Before working on the device, always disconnect the supply voltage.
n Connect the device to the supply voltage only after completion of the work.
During installation, read the instructions provided by the grease interceptor
manufacturer. Ensure that the suspension mechanism keeps the sensor
permanently at the correct height. Where possible, secure the device in a position
where it can be reached from the manhole opening so that it can be removed
when emptying (disposal) or carrying out maintenance work on the grease
interceptor.
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2
1
Installation
The oil/petrol separator can be made of various materials. We therefore
recommend using the following methods to secure the device in a suspended
position:
n If mounting the device in concrete containers, use the NVO5-B mounting
set. See the figure below.
n If mounting the device in containers made from other materials, such as
plastic or metal, use other suspension devices as appropriate, for example,
screws and screw anchors.
Figure 3.1 Mounting using cable connector and mounting set
1 Mounting set for one sensor NVO5-B
2 Cable connector for one sensor LAL-SK2
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Installation
3.2 Mounting the KVF-F Fat Level Sensor
The sensor must be immersed a few centimeters when the liquid is at its normal
level (water zero line).
The exact immersion depth depends on
n the type of grease interceptor,
n its design,
n its capacity
n and the height of the maximum fat layer thickness.
The sensor must always be immersed in the liquid. The switching point of the
sensor is located between the insulated connecting piece and the top metal
section.
Caution!
Damage to the cable as a result of aggressive greases
The sensor cable must not be in continuous contact with grease or with water that
contains grease. The sensor is therefore fitted with shrink tubing. The shrink
tubing protects the cable from the effect of the grease to a fat layer thickness of
30 cm.
If fat layer thicknesses of more than 30 cm occur in your application, protect the
cable with additional shrink tubing.
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L
S
B
C
A
1
2
300
X
Installation
Figure 3.2 Mounting the fat level sensor
1 Fat level sensor KVF-F
2 Shrink tubing
A Air
B Fat, oil, grease (FOG)
C Water
L Water zero line
S Sensor switching point
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X Alarm limit (maximum fat layer thickness)
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Installation
3.3 Connection of the Sensor
Read the chapter on Safety and, in particular, the section on Installation and
Commissioning (see chapter 1.6) before connecting the sensor.
Warni ng!
Risk of short circuit
Injuries and damage to the device are possible when working with live parts.
n Before working on the device, always disconnect the supply voltage.
n Connect the device to the supply voltage only after completion of the work.
Take care not to reverse the polarity when connecting the sensor cable. The loop
resistance of the extension cable should not exceed 20 for the sensors.
For extending the sensor cable, use cable connector LAL-SK2.
Note!
Avoid routing the sensor cable parallel to other cables, as these cables may
transmit interfering signals. These interfering signals may affect the sensor signal
and impair the alarm function. Use unshielded 2-strand cables for each sensor.
To ensure the warning device functions correctly, do not exceed the following
maximum sensor cable lengths:
n With a cable cross section of 0.75 mm
190 m.
n With a cable cross section of 1 mm
2
, the maximum cable length is
2
, the maximum cable length is 250 m.
Note!
Further information on connection of the sensors to the warning device is
available in the manual of the warning device NVD-111.
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Operation
4Operation
4.1 Emptying (Disposal) of the Container
The sensor is a sensitive component. Therefore always observe the following
safety information during emptying (disposal):
Caution!
Malfunction or damage through mechanical stress of the sensor.
In case of nonobservance, the safety and operation of the sensor or the entire
alarm system is not guaranteed.
n Before emptying (disposal) the grease interceptor, remove the sensor from
the container.
n Protect the sensor against impacts, knocks and unnecessary tensile forces
in the cable.
n Insert the sensor in the grease interceptor only after it has been filled.
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Maintenance and Repair
5 Maintenance and Repair
5.1 Function Testing
Test frequency
The sensor is maintenance-free. However, to guarantee perfect operation of the
complete alarm system check the operation of the sensor at least once a year, or
more frequently in the event of unfavorable environmental conditions.
Checking the normal status
1. Switch DIP switch 1 to position OFF.
2. Remove the sensor from the grease interceptor.
3. Wash and dry the sensor.
4. Hold the sensor in your hand (no gloves). Only touch the upper and lower
metal section or
5. Immerse the sensor in water.
The green "SYSTEM OK" LED on the warning device flashes or lights up.
Checking the alarm situation
1. Switch DIP switch 1 to position OFF.
2. Suspend the fat level sensor freely in air.
The red "FAT LAYER ALARM" LED lights and, if applicable, an acoustic
signal sounds.
Note!
Further information on connection of the sensors to the warning device is
available in the manual of the warning device NVD-111.
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Troubleshooting
6 Troubleshooting
6.1 Sensor Maintenance
Caution!
Malfunction or false alarm caused by a contaminated sensor
If the sensor is very dirty, this may trigger a false alarm or mean that no alarm is
triggered under certain circumstances.
n Clean and dry the sensor when emptying/disposing of the oil/petrol
separator or container.
n Do not clean the sensor with corrosive liquids.
Cleaning the Sensor
The sensor is maintenance free. To ensure the entire alarm system functions
correctly, clean the sensor at the following intervals:
1. Clean the sensor at least once a year.
2. Pay particular attention to cleaning the sensor tips of all oil, grease, and other
dirt residues using a grease-dissolving cleaning agent.
3. If the sensor is used in difficult conditions, clean the sensor more often.
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Technical Specifications
7 Technical Specifications
7.1 Fat Level Sensor KVF-F
Power supply
Rated voltage 13 V DC
Ambient conditions
Ambient temperature -20 °C … 60 °C (253 K … 333 K)
Mechanical specifications
Protection degree IP68
Connection cable
Material stainless steel
Cable 5m
Mass approx. 520 g
Dimensions 31.6 mm x 138 mm
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Subject to modifications
Copyright PEPPERL+FUCHS • Printed in Germany
www.pepperl-fuchs.com
PROCESS AUTOMATION –
PROTECTING YOUR PROCESS
Worldwide Headquarters
Pepperl+Fuchs GmbH
68307 Mannheim · Germany
Tel. +49 621
776-0
E-mail: info@de.pepperl-fuchs.com
For the Pepperl+Fuchs representative
closest to you check www.pepperl-fuchs.com/contact
266860 DOCT-2421A
04/2014
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