Mollet LF20 Series User manual

M LLET
Füllstandtechnik
GmbH
04/14 © by MOLLET LF-BA-01 01 MOLLET D-74706 Osterburken Tel. [phone] Fax [phone] Operating instruction
Operating instruction
Page
Index
Yo-Yo sensing level measurement
continuous level indication for bulk solids
LF
Safety instructions | Special conditions for ATEX-devices | Use . . . . . . . . . 02
Data of manufacturer | Incoming goods inspection and storage | Identification . . . . . . . . . . . 03
Data of measuring devices | Technical data | Electrical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 04
Dimensions | Connecting flange . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 05
Sensing weights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 06
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 07
Assembling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 08
Electrical connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Commissioning | Parameterisation | Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Repair . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Returns | Disposal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
. . . . . . . . . . . . . .

02 LF-BA-02 04/14 © by MOLLET
M LLET
Füllstandtechnik
GmbH
Operating instruction MOLLET D-74706 Osterburken Tel. [phone] Fax [phone]
1.
1.1
1.2 Check before installation whether the measuring device is in compliance with the specification of the point of
measurement like process and ambient temperature as well as the measuring range and whether the sensing weight
is suitable for the bulk solids.
1.3 For the electrical connection take notice of the local and statutory rules and regulations and/or the VDE 0100.
1.4 Consider the data of the name plate on the device.
1.5 A fuse (with max. 6 A) has to be connected in series to the voltage supply.
1.6 Protect the signal contacts from voltage peaks when inductive loads are connected.
1.6 Check the cable entry, cable gland and clamping nut, to see if they are sitting correctly and are sealed.
1.7 Put the device into operation only when the unit is closed and the cover sealing is intact.
1.8 The sensing weight must not sink into the bulk good surface and must not slip away at the angle of repose or
removal funnel.
1.9 Switch off the power supply, before opening the device (touch dangerous voltage).
1.10 Changes and repairs of the device are allowed only in so far as it is permitted in the operating instructions.
Safety instructions
The installation, initial operation and maintenance must be done by a qualified expert with electrical know-how.
Please, read and obey these safety instructions and the complete operating manual.
Prior to the use of the device in potentially explosive atmospheres please, read and obey the
Special conditions and guidance for safe use
in the attached
Explosions protection information
and note the operation instruction.
2. Use of the device
2.2 Normal operation
- Please operate the measuring device only according the intended use.
- Use the measuring device only within the specified temperature ranges for process and ambience.
- Protect the electronics compartment against pollution.
- In case the measuring device becomes damaged, please stop operation immediately.
2.3 Improper use
- Ignoring safety regulations and operation instruction.
- Operation of the measuring device in inappropriate use.
- Installation of spare parts that are no original parts.
- Removal, addition or modification of components as far as it is not described in the documentation of the manufacturer.
- Violation of applicable standards and laws.
2.1 Intended use
- The device is used for cyclical level measurement of bulk solids with a density of >0.02 t/m³ in bunkers or silos.
Yo-Yo sensing level measurement
LF20

M LLET
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3. Data of manufacturer
Manufacturer MOLLET
Füllstandtechnik GmbH
Adress Industriepark RIO 103
74706 Osterburken
Germany
Name of part MOLOSbob
YO-YO sensing level measurement
Typ LF20- ...
A Standard = B conform and IP67
B ATEX W II 1/2D Ex ta/tb IIIC T99°C
YFurther approvals
Housing
8 Standard Aluminium coated RAL 7001, lid Aluminium nature
0Special coating
Measurement range
4 Standard 15 m tape, stainless steel 1.4310
532 m tape, stainless steel 1.4310
842 m tape, stainless steel 1.4310
Wiper, maximum nozzle height
A Standard - wiper 230 mm Aluminium / steel
BWiper 230 mm stainless steel 1.4301
CWiper 500 mm Aluminium / steel
DWiper 500 mm stainless steel 1.4301
EWiper 1000 mm Aluminium / steel
FWiper 1000 mm stainless steel 1.4301
Supply voltage
1 Standard 90 V AC ... 253 V AC, 50/60 Hz
320 V DC ... 28 V DC
Output
A Standard 0/4 ... 20 mA adjustable and 2 relay outputs
C0/4 ... 20 mA adjustable and 4 relay outputs
YSpecial version
Ambient temperature
D Standard -20°C ... +60°C
E-40°C ... +60°C with heating (ATEX II 1/2D -35 °C)
F-20°C ... +60°C with extended climate resistance
YSpecial version
Process temperature
1 Standard = -20°C ... +60°C
2-20°C ... +150°C
9Special version
Sensing weights
A w/o sensing weight
BNormal weight, steel
CNormal weight, stainless steel 1.4571
DUmbrella / steel weight
EUmbrella / stainless steel weight 1.4571
GMedium bag, Polyester
NPlastics weight, PVC and steel
XFloat gauge, stainless steel 1.4571
Additional equipment
1 Standard (no additional equipment)
2Window and start push button
9Special version
Certifications, certificates, approvals
Dust
1)
1)
1)
1)
Order code
12345 6 78 9 10
Tape border
Sensing weight mounting
Rotating bush
4. Incoming goods inspection and storage
4.1 Incoming goods inspection
- Please check whether packaging or content are damaged
- Please check whether the supplied goods are incomplete or do not comply the
requirements as set out in your order.
4.2 Storage
-
.
For storage and transportation the measuring device has to be packed shock-
resistant.
-Temperature range for storage -40 °C ... +60 °C
5. Identification
Yo-Yo sensing level measurement
LF20
Housing with 2 compartments
1.
2. Spool with measuring tape
Motor and electronics
Connecting flange
Wiper
Sensing weight
Buckling protection chain
Sealing cuff
1) not available for use in
potentially explosive atmospheres

6.2 Application data
6.4 Electrical data
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Supply voltage 90 ... 253 V 50-60 Hz
or 5.320 ... 28 V (DC)
Power consumption AC = 150 VA DC = 150 W
with heater 7.E AC = 170 VA DC = 170 W
Terminals max. 2.5 mm²
Cable entry 3x screwing M20x1.5 (6 ... 13 mm)
Signal inputs 2 available for external start or lock
measurement
active Input voltage range of an external control
12 ... 24 V DC
passive Connection of an external command unit,
e.g. switch, key, relay contact
(Start pulse length: min. 200 ms)
Signal outputs active 0/4 ... 20 mA current output,
working resistance max. 600
Relay outputs 2 relay outputs ( )
optional 6.C2 additional relay outputs
Selectable relay functions
Counting pulse Pulses according tape length rolled out
Reset pulse Pulse before every new measurement
e.g. to reset an external counter
Gating of counting pulse Pulse during running up the sensing
weight, e.g. to hide counting pulses
Measurement active Pulse during active measuring cycle,
e.g. to lock a filling device in order to
protect the sensing weight from being
covered by medium
End of measurement Pulse when sensing weight reached
upper end position
Alarm Output of fault states
Service interval Information on required maintenance
Contact load 250 VAC, 6 A
Optocoupler output for counting pulse
(optional when 4 relay are selected)
Loading capacity U max. 30 V DC, I max. 10 mA
Break down information recallable via following interfaces
Local display Error symbol
Error code with plain text dispaly
Current output State programmable:
Minimum
Current value <= 3.6 mA (4 - 20 mA) or
Current value 0 mA (0 - 20 mA)
Maximum
max. current value +10% (=22 mA)
Relay output Alarm function
5.1(AC)
Ω
Standard
Silver-cadmium-oxid contacts, gold plated
Materials Housing Aluminum die casting, coated RAL 7001
Housing lid Aluminum AlMgSi1
Process connection Aluminum die casting
Tape Stainless steel 301, modified
Wiper Aluminum/Steel
or Stainless steel 304
Sensing weights
Normal weight 9.BSteel
Normal weight 9.CStainless steel
Umbrella 9.DPolyester and steel
Umbrella 9.EPolyester and stainless steel
Medium bag 9.GPolyester and stainless steel
1
Plastics weight 9.NPlastics and steel )
Weight w/o sensing weight 10 kg
with sensing weight 11.5 kg
Dimensions 300 x 260 x 225 (HxBxD)
Angle of inclination max. 2°
Protection type IP67
Maintenance approx. after 45,000 measuring cycles
316Ti
316Ti
316Ti
1) not available for use in potentially explosive atmospheres
Ambient temperature 7
with heater -40 °C ... +60 °C
ATEX-device with heater 7.E-35 °C ... +60 °C
Process temperature 8. -20 °C ... +70 °C
8.2-20 °C ... +150 °C
with heater 7.E-40 °C ... +70 °C
ATEX-device with heater 7.E-35 °C ... +70 °C
Process pressure
.D-20 °C ... +60 °C ( )
7.E
1
- 0.5 bar ... 1 bar
Standard
Standard
1)
1)
1)
1) not available for use in potentially explosive atmospheres
( )
T(Process)
Tamp
p(Process)
IP
Tape length 34 15 m
532 m
842 m
Measuring accuracy ± 2.5 cm or ± 1 Impuls
(independent of selected measuring distance)
Highest measurable point Calculated from the block distance
plus a minimum run-out length of 20 cm
The individual value of the block distance is preset when delivered
and has only to be adjusted when the sensing weightis replaced.
.
3.
3.
Tensile force max. 150 N
Tape run-off speed 0.16 ... 0.25 m/s
6. Data of measuring device
6.1 Technical data
Yo-Yo sensing level measurement
LF20
Supply
6.3 Technical measuring data

146
225
100
30
230
160
156
Lk 180
186
9518
515 or 1015
20
100
205
220
300
260
Standard wiper 4.A, 4.BExtended wiper 4.C, 4.D or 4.E, 4.F
„X“
6.5 Dimensions
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6.6 Process connection flange view „X“
Yo-Yo sensing level measurement
LF20

~ 300
Ø ~ 150
110110
~ 515
Ø55
Ø8
~ 525
Ø80
230
~ 525
Ø8
115105
Edge length 400
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6.7 Sensing weights
!!! Select a sensing weight that will not sink into the bulk good surface and will not slip away at the angle of repose or removal funnel.
The bag is filled with the respective medium stored in the bunker or silo.
Normal weight, o
for temperatures up to +150 °C
For granulates and compacted bulk solids.
Bulk density >0.3 t/m³
Angle of repose steep with spike
flat w/o spike
The spike avoids slipping or tilting of the
sensing weight on a steep bulk surface.
rder code 5.B/5.C
Steel/stainless steel
022-0207
Spike (screw-off)
Bag weight
for temperatures up to +150 °C
For granulates and compacted bulk solids.
Bulk density >0.2 t/m³
Angle of repose flat
Avoids damage of
outlet devices.
, order code 5.G
Polyester and stainless steel
022-0208
Plastic weight
for temperatures up to +70 °C
For granulates and compacted bulk solids.
Bulk density >0.3 t/m³
Angle of repose flat
, order code 5.N
PVC and steel
022-0209
Not available for use in potentially explosive atmospheres.
Umbrella weight
for temperatures up to +150 °C
For very light and loose bulk solids.
Bulk density >0.02 t/m³
Angle of repose steep with spike
flat w/o spike
A large square surface prevents
it from deeply sinking into
the bulk solid.
, order code 5.D/5.E
Steel/stainless steel and Polyester
022-0210
Spike
(screw-off)
Yo-Yo sensing level measurement
LF20

022-0218
022-0202
*)
Slope
100 % full
X %
Y %
0 % empty
*)
*)
*)
*)
Observe size and position of angle
of repose and removal funnel
Measuring distance
Cornices
Stream of bulk material
< 2°
 Ø95
Distance Distance
Lk180
< 2°
 Ø95
Ø220
4xØ18
022-0701
022-0702
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7.2 Place of installation - distances and nozzle
7. Installation
7.1 Place of installation - Slope 7.3 Planing of place of installation
- Keep enough distance between measuring tape and internal
fixtures and fittings in order to avoid contact when the sensing
weight is oscillating.
-
7.4 Installation nozzle
- The device is best mounted on a nozzle with a horizontal
counter flange
7.5 Installation nozzle for +150 °C
- For the process temperature range
- Observe size and position of angle of repose and removal
funnel. Select a measuring point that is approximately in the
middle of the slope.
(<2°)
DN100 PN16 (dimensions acc. to EN 1092-1) or
-20 ... +150 °C (option 8.2)
- Select the mounting position on the bunker or silo roof in such a
way that falling bulk goods during filling or collapsing cornices
cannot spill the sensing weight and cannot damage the measuring
tape.
a flange with the same connection conditions.
- The minimum internal diameter of the nozzle has to be 95 mm.
- The length of the nozzle comply with the length of the wiper.
e.g. Wiper 230 mm  nozzle length 230 mm.
- Sensing weight has to be outside of the nozzle in the uppermost
position when measuring tape is completely wound up.
-
wiper and nozzle have to be at least 500 mm long.
500 mm
Wiper 500 mm
Ambient temperature
-20 °C  Ta  +70 °C
Process temperature
-20 °C  Ta  +150 °C
Installation nozzle
Sensing weight
Select length of the nozzle in
such a way that the sensing
weight poke out of the nozzle.
Yo-Yo sensing level measurement
LF20

Rotating bush
Normal sensing weight
Wiper
Spike
Hook rod
Access hatch
Maesuring tape
e.g. filled bag
Lower carefully!
Tape border
Buckling
protection
chain
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8.1
and buckling protection chain.
- Fix the sensing weight on-site at the tape border with the screws
provided.
-
8.2 Assembling LF20
- First put a sealing ring on top of the flange.
-
8.3 Insert large sensing weights
Assembling sensing weight
- Sensing weight is delivered preassembled including rotating bush
- Insert the sensing weight carefully through the nozzle into the silo
or bunker.
- Put now the measuring device on top of the flange.
- Observe the position of the cable entry for the electrical
connection.
- Assemble the device horizontal and fix it with four suitable
screws M16, plain washers and nuts.
- Normal weights, plastic weights and umbrella weights can be
insert into the silo or bunker through the installation nozzle.
- When using larger sensing weights, such as a filled medium bag
for example, a point must be present in the design of the bunker or
silo (e.g. access hatch) where these weights can be installed.
8. Assembling
Yo-Yo sensing level measurement
LF20

Transport fixture
Blind plug G¼
Connection for a
compressed air line
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Yo-Yo sensing level measurement
LF20
8. Assembling
8.4 Transport fixture
as soon as the measuring device is fixed on top of the flange (see
figure
-
8.5 Protection against dust
- In case of severe dust emission in bunkers or silos a compressed
air line can be connected above the mounting flange in order to
generate a slight over pressure.
-
8.6 Check after assembling
-
-
8.7 Weather protection
- Please remove the transport fixture in the tape spool compartment
)!
- Unpredictable device reactions will occur, if this transport fixture is
not removed.
- Check the correct position of the cover sealing before you close
the cover.
- A G¼ bore is provided for this purpuse.
- Air volume as required.
- Are there any damages at the measuring device (visual check)?
- Are the number of the measuring point and the labelling correct?
- Is there enough protection against ?
- Protect the measuring device against direct sunlight and heavy
rain by using a weather protection cover or fit the protective hood
available as an accessory.
Is the transport fixture in the tape spool compartment removed?
direct sunlight and heavy rain

1
2
3
4
5
6
7
8
9
10
11
12
1 2 3
1
2
3
4
5
6
7
8
9
10
2.1
Terminal 1
Terminal
2.2
3.1 3.2
Ground terminal
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9. Electrical connection
9.1 Potential equalization
- Connect the ground terminal on the housing to the local potential
equalization.
-
9.2 Potentially explosive dust atmospheres
-
9.3 Check before electrical connection
-
-
9.5 Electrical connection
-
- Wire cross-section  2.5 mm².
- Use wire as short as possible.
- W -marking only.
- For use of the device in potentially explosive atmospheres the
applicable national rules and standards have to be obeyed.
Always observe the explosion protection information and the
included safety instructions.
.
- Switch off the voltage supply before connecting the device.
- Maximum wire cross-section for the terminals  2.5 mm².
- To protect electrical circuits use electrical fuse with maximal 6 A.
Use devices with a valid
The voltage supply must match the voltage specified on the name
plate
For connection a basic installation cable is sufficient.
-
9.4 Position of terminals
Terminal
Yo-Yo sensing level measurement
LF20

7
8
9
10
11
12
1
2
3
4
5
6
1 2 3
PE
1 2 3 1 2 3
N PE
1
2
3
6
7
8
1
2
3
6
7
8
9
10
4
5
001-0203
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Yo-Yo sensing level measurement
LF20
9. Electrical connection
Supply voltage AC
Circuit diagram - Terminal 1
Supply voltage DC
Circuit diagram - Terminal 1
5.1 90 ... 253 V (AC) 50-60 Hz 5.3 20 ... 28 V (DC)
For connection a basic installation cable is sufficient.
Relay output
Circuit diagram - Terminal 2.1
Relay output optional 6.C
Circuit diagram - Terminal 2.2
250 VAC, max. 6 A
250 VAC, max. 6 A
Contacts made of silver-cadmium-oxide, gold plated
250 VAC, max. 6 A
250 VAC, max. 6 A
Contacts made of silver-cadmium-oxide, gold plated
The rest position matches with the position of the relays without power supply.
This represents the alert condition in case the function “alarm” is selected.
[014] Relay-
autput 1
[01A]
autput 2
Relay-
[01B]
autput 3
Relay-
[01C]
autput 4
Relay-
[012] Signal input 2[010] Signal input 1[012] Signal input 2[010] Signal input 1
Signal inputs active Pulse lenght  200 ms
Circuit diagram - Terminal 3.1 and 3.2
12 ... 24 V DC 12 ... 24 V DC
Signal inputs passive Pulse lenght  200 ms
Circuit diagram - Terminal 3.1 and 3.2
The signal inputs active or passive can only be used alternatively.
A double connection from active and passive can not be used!
0/4 ... 20 mA U 30 V DC
I 10 mA
Current output
Circuit diagram - Terminal 3.2
Optocoupler output optional 6.C
Circuit diagram - Terminal 3.1
[033] Current output
Working resistance  600 Ω

Sealing cuff
Wiper plates
Wiper blocks
End guide
Measuring tape
M6x50
Measuring tape
Buckling protection chain
with sensing weight
Inlet guiding cone
10. Commissioning
10.1 Checks before commissioning
- Check whether the terminal assignment is correct.
measuring device will be operable, if the LCD-display is
shining.
-
- Check the tightness of the cable gland.
- Switch on the supply voltage.
- The
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12.1
-
12.2
In case of severe dust emission it is recommended to connect
a compressed air line above the mounting flange in order to
generate a slight over pressure (see chapter 8.5 Assembling).
12.3
- Check whether the edges of the wiper blocks are still sharp
12.4
12.5 Check of tape spool compartment
-
External cleaning
Ensure that the cleaning agent used for externally cleaning does
not attack the housing surface and seals.
Cleaning tape spool compartment
Wiper check
If necessary please substitute the end guide.
In case of abrasion please substitute the wiper plates.
Check of the measuring tape
operation
-
Check the tape spool compartment in regular intervals.
please
replace it.
- The cleaning periods depend on the properties of the bulk solid.
-
To check the wiper you have to remove the LF20. To do so, please
note chapter 8 Assembling.
(round edges do no more clean the measuring tape correctly).
- If necessary please turn or substitute the wiper blocks.
- Check the end guide for cuts caused by the measuring tape.
If there are deep cuts, there will be a risk of measuring tape
jamming.
-
-
- Check whether both wiper plates are securely in contact with the
measuring tape.
- Check whether the bellows are still in perfect condition and
replace in case of damages.
- Check the measuring tape in regular intervals.
- If the visible part of the measuring tape is damaged, uncoil a
section by manual [020] until it looks perfect.
Cut off the damaged parts and re-mount the sensing weight.
Do not cut off too much. Note the original length and the
measurement range required (silo height).
- If the measuring tape is damaged on a longer part, please replace
the entire measuring tape.
- If the tape spool is damaged, please replace it.
- If the counting wheel is very sluggish to turn in spite of removed
tension of the measuring tape or in case it is damaged,
- Please replace deteriorated or damaged cover seals.
Please refer to chapter 13 repair for details to dismantle the
LF20.
Tape border
11. Parameterisation
11.1 Parameterisation
- Please undertake the parameterisation of the measuring device
by using the instruction for parameterisation.
- Close the housing with the cover after the parameterisation has
been finished.
12. Maintenance
Wiper
Yo-Yo sensing level measurement
LF20

Tape spool
Counting wheel
Mounting screw
for motor-gearbox
combination
Mounting screw
for tape spool
Cover of tape spool
compartment
Wiper
Flange
Screws M5
Measuring tape
Buckling protection chain
with sensing weight
Inlet guiding cone
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Tape border
13.2
13.3
13.4
1.
Replacement of components
- Only original spare parts from MOLLET must be used.
- When ordering spare parts, please note the device designation on
the nameplate.
- Parts may only be replaced with the same parts.
-
1. Move down the sensing weight at least 5 cm by using the
manual mode [020] in order to
.
When using larger special sensing weights, the weight must
be lowered to an appropriate hatch (see 8.3 assembling).
2. Switch off and disconnect the supply voltage of the device.
3. Remove and/or expose the LF20 until the wiper and the
sensing weight are accessible. .
4. Remove the sensing weight including the tape border from the
measuring tape.
5. Unscrew the four screws on the tape spool.
6. Removed carefully the tape spool and the unwound part of the
measuring tape from the device.
7. A new tape spool is then installed in reverse order.
.
2. Unscrew the three M5 screws at the flange of the wiper.
3. After that you will be able to take out the wiper.
Take care that during
4. Mounting and dismounting in
Change of measuring tape
remove tension of the measuring
tape
Change of wiper
The wiper can be replaced as soon as the device is prepared as
described in chapter 13.3 change of measuring tape
mounting and dismounting the
measuring tape is positioned correctly in the wiper. The tape
must not be turned in tape spool compartment. In order to
check this open the cover of the tape spool compartment.
reverse order.
13. Repair
13.1 Repair of Ex-certified devices
!!! MOLLET-
service team.
Ex-certified devices may only be repaired by
Yo-Yo sensing level measurement
LF20

Motor-gearbox
combination
Return spring
Motor-gearbox
combination
C
BA
Cover plate
Cover plate
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13.5 Change of drive unit
1.
2. Fasten the sensing weight or measuring tape.
3. .
4. Unscrew mounting screws of the cover plates and remove them.
5. Disconnect the plug for the motor connector cable at the top
right of the motor-gearbox combination.
6. Unscrew mounting screw of the motor-gearbox combination on
the side of tape spool compartment (see figure page LF-BA-13).
7. Carefully remove the top PCB C (processor + display), you can
pull out the PCB for approx. 3-4 cm and put it on top of the
housing. (PCB is still connected to 2 flat cables)
8. Carefully hang out the return spring. The motor gearbox
combination can now be removed .
9. A new motor-gearbox combination has to be installed in reverse
order.
!!!
(ATEX).
Move down the sensing weight a little bit by using the
manual mode [020] in order to remove tension of the measuring
tape and the drive shaft.
Switch off and disconnect the supply voltage of the device
carefully
Mounting screw of the motor-gearbox combination has to
be installed with a copper washer
13. Repair
Yo-Yo sensing level measurement
LF20

M LLET
Füllstandtechnik
GmbH
04/14 © by MOLLET LF-BA-15 15 MOLLET D-74706 Osterburken Tel. [phone] Fax [phone] Operating instruction
14. Returns to the manufacturer
- Remove all residue of the bulk goods before returning the device
to the manufacturer
15. Disposal
- The level measurement device can be recycled.
- Disposal of the level measurement device is subject to the
environmental legislation of the respective country in effect for the
operator's premises and production conditions.
-
.
- Pay particular attention to seal grooves and scoring in which
residue of the bulk goods may stick.
That is of particular importance if the bulk goods poses a
risk to health, e.g. flammable, poisonous, corrosive or
carcinogenic.
- Please although specify:
• The chemical and physical characteristics of the bulk goods
• Description of the application
• Description of the error that has occurred
(when indicated, specify the error code)
• Operating period of the device
13.6 Change of electronic and PCBs
- Note all parameters into the parameterisation instruction before
replacing the electronic or single PCBs.
- After the replacement of
- The PCBs should only be replaced by a specialist.
- A precise description of the replacement process will be delivered
with every new piece of PCB, therefore such a description is not
provided at this point.
- When working with electronic components ensure that you have
sufficient ESD protection (protection against electrostatic
discharge).
- Only use the PCBs permitted for the device type when replacing
parts.
- The use of incorrect electronic parts may damage the device and
the Ex-certification will be lost.
the electronic or single PCBs a basic
setup has to be done and all parameters have to be re-inserted.
13. Repair
Yo-Yo sensing level measurement
LF20

M LLET
Füllstandtechnik
GmbH
16 LF-BA-16 04/14 © by MOLLET Operating instruction MOLLET D-74706 Osterburken Tel. [phone] Fax [phone]
Yo-Yo sensing level measurement
LF20