KERN & SOHN KFD 1500V20LM User Manual

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KERN & Sohn GmbH

Ziegelei 1 D-72336 Balingen E-Mail: info@kern-sohn.com

Installation instructions Drive-through scale

KERN KFD V20

Version 1.0 09/2011 GB

Phone: +49-[0]7433- 9933-0 Fax: +49-[0]7433-9933-149 Internet: www.kern-sohn.com

KFD V20-IA-e-1110

KERN KFD V20

Version 1.0 09/2011

Contents

1 General ........................................................................................................... 3

2 Technical data................................................................................................ 3

2.1 Dimensions................................................................................................................................. 4

3 Appliance overview ....................................................................................... 5

4 Basic Information (General).......................................................................... 6

4.1 Documentation ........................................................................................................................... 6

4.2 Proper use .................................................................................................................................. 6

4.3 Improper Use.............................................................................................................................. 6

4.4 Warranty ..................................................................................................................................... 6

4.5 Monitoring of Test Resources ....................................................................................................7

5 Basic Safety Precautions .............................................................................. 7

5.1 Pay attention to the instructions in the Operation Manual ......................................................... 7

5.2 Personnel training ...................................................................................................................... 7

6 Transport and storage................................................................................... 7

6.1 Testing upon acceptance ........................................................................................................... 7

6.2 Packaging / return transport ....................................................................................................... 7

Installation instructions Drive-through scale

7 Unpacking, Setup and Commissioning ....................................................... 8

7.1 Installation Site, Location of Use ................................................................................................ 8

7.2 Unpacking, Scope of delivery..................................................................................................... 9

7.3 Assembly, levelling..................................................................................................................... 9

7.4 Connecting a display unit ......................................................................................................... 10

8 Operation...................................................................................................... 10

8.1 Operation limits......................................................................................................................... 11

8.2 Operation with access ramps ................................................................................................... 11

8.3 Load/unload weighing system.................................................................................................. 11

9 Service, maintenance, disposal.................................................................. 12

9.1 Daily check ............................................................................................................................... 12

9.2 Cleaning ................................................................................................................................... 12

9.3 Service, maintenance............................................................................................................... 12

9.4 Disposal.................................................................................................................................... 12

9.5 Instant help ............................................................................................................................... 13

10 Service documentation ............................................................................... 14

10.1 Overview, setting regulation, tolerances .................................................................................. 14

10.2 Check and adjustment of the corner load ................................................................................ 16

11 Preload, Deadload and Overload settings ................................................. 17

KFD V20-IA-e-1110 2

1 General

• These installation instruction contain all data necessary for placing and commissioning the following weighing bridges:

KERN KFD 600V20M

KERN KFD 600V20LM

KERN KFD 1500V20M

KERN KFD 1500V20LM

2 Technical data

Model

Weighing range Max kg g g kg kg m kg

Readability d

Verificati on value e

Minimum load Min

Preload additive

Cable length approx.

Net weight approx.

KFD 600V20M 600 200 200 4 120 4 85

KFD 600V20LM 600 200 200 4 120 4 85

KFD 1500V20M 1500 500 500 10 300 3 140

KFD 1500V20LM 1500 500 500 10 300 3 140

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2.1 Dimensions

KFD V20-IA-e-1110 4

3 Appliance overview

Access ramp

Weighing bridge

Cover of weighing cell feet

Connection cable

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4 Basic Information (General)

4.1 Documentation

These installation instructions contain all data necessary for placing and commissioning the weighing bridges KERN KFD V20. In combination with a display unit, described below as weighing system, for operation configuration, please refer to the operating instructions of the display unit.

4.2 Proper use

The balance you purchased is intended to determine the weighing value of material to be weighed. It is intended to be used as a “non-automatic balance”, i.e. the material to be weighed is manually and carefully placed in the centre of the weighing plate. As soon as a stable weighing value is reached the weighing value can be read.

4.3 Improper Use

Do not leave permanent load on the weighing bridge. This may damage the measuring system.

Impacts and overloading exceeding the stated maximum load (max) of the weighing system, minus a possibly existing tare load, must be strictly avoided. The weighing system could be damaged. Never operate in an explosive environment. The serial version is not explosion protected. Changes to the weighing system's design are not permitted. This may lead to incorrect weighing results, safety-related faults and destruction of the balance. The weighing system unit may only be operated in accordance with the described default settings. Other areas of use must be released by KERN in writing.

4.4 Warranty

Warranty claims shall be voided in case

• Our conditions in the operation manual are ignored

• The appliance is used outside the described uses

• Structural changes of the device

• Mechanical damage and damage caused by media, liquids

• Natural wear and tear

• The appliance is improperly set up or incorrectly electrically connected

• Overload of the measuring system

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4.5 Monitoring of Test Resources

In the framework of quality assurance the measuring-related properties of the weighing system and, if applicable, the testing weight, must be checked regularly. The responsible user must define a suitable interval as well as type and scope of this test. Information is available on KERN’s home page (www.kern-sohn.com with regard to the monitoring of weighing system test substances and the test weights required for this. In KERN's accredited DKD calibration laboratory test weights and weighing systems may be calibrated (return to the national standard) fast and at moderate cost.

5 Basic Safety Precautions

5.1 Pay attention to the instructions in the Operation Manual

Carefully read this operation manual before setup and commissioning, even if you are already familiar with KERN balances.

5.2 Personnel training

The appliance may only be operated and maintained by trained personnel. The installation of a display unit must only be carried out by a well acquainted specialist with the workings of weighing balances.

6 Transport and storage

6.1 Testing upon acceptance

When receiving the appliance, please check packaging immediately, and the appliance itself when unpacking for possible visible damage.

6.2 Packaging / return transport

Ö Keep all parts of the original packaging for a possibly

required return.

Ö Only use original packaging for returning.

Ö Prior to dispatch disconnect all cables and remove

loose/mobile parts.

Ö Reattach possibly supplied transport securing devices.

Ö Secure all parts against shifting and damage.

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7 Unpacking, Setup and Commissioning

7.1 Installation Site, Location of Use

The weighing bridges are designed in a way that reliable weighing results are achieved in common conditions of use. You will work accurately and fast, if you select the right location for your weighing system.

On the installation site observe the following:

• Place the weighing bridge on a firm, level surface. The floor at the installation site must be able to carry safely the weight of the maximally loaded weighing bridge at the resting points. At the same time it should be sufficiently stable, that no vibrations may occur during weighing work.

• In the installation site possibly no vibrations, e.g. by neighbouring machines should occur.

• Do not use the weighing bridge in an explosive environment.

• Avoid extreme heat as well as temperature fluctuation caused by installing

next to a radiator or in the direct sunlight.

• Protect the weighing bridge against direct draughts e.g. due to open windows and doors.

• Use weighing bridge only in dry environment, protect it against high humidity, vapours and dust.

• Do not expose the device to extreme dampness for longer periods of time. Non-permitted condensation (condensation of air humidity on the appliance) may occur if a cold appliance is taken to a considerably warmer environment. In this case, acclimatize the disconnected appliance for ca. 2 hours at room temperature.

• Avoid jarring during weighing.

• Avoid static charge of goods to be weighed or weighing container.

• Keep away chemicals (such as liquids or gasses), which could attack and

damage the balance inside or from outside.

• Keep IP protection of the device.

• Major display deviations (incorrect weighing results) may be experienced

should electromagnetic fields (e.g. due to mobile phones or radio equipment), static electricity accumulations or instable power supply occur. Change location or remove source of interference.

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7.2 Unpacking, Scope of delivery

+ Danger for the back!

The weighing bridge is relatively heavy. Always use a suitable

CAUTION

lifting device to lift it out of the packaging or to transport it to the required installation site.

+ Do not step under the suspended load, risk of injury!

Ö Remove outer packaging and packaging material.

Ö Lift the weighing bridge equally off the packaging material, see caution note.

Secure the weighing bridge that it cannot fall down when it is lifted.

Ö Ensure that the contents of package is complete.

Scope of delivery:

• Weighing bridge see chapter 3

• Operating instructions

7.3 Assembly, levelling

Accurate weighing results require a weighing bridge with perfect horizontal alignment. During initial installation and after each change of work area it is necessary to level the weighing bridge.

Ö Prior to the final placing, install the four weighing cell feet.

Ö Place the weighing bridge equally on the installation site and check if it is in an

even position and all four feet are in contact with the floor. Level the weighing bridge by turning the weighing cell feet. For this purpose use an external levelling appliance, e.g. a water level.

Ö Ensure that the connecting cable is not damaged or squeezed during lifting and

placing.

+ The weighing bridge must be aligned with the help of a

water level.

+ All setting feet must rest equally.

Verified weighing systems:

In case of verified weighing systems the weighing bridge must be firmly fixed on the floor. This is essential for the reproducibility of the measuring results. Optionally using two access ramps or two pairs of foot plates or a combination of both.

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7.4 Connecting a display unit

Attention

Put the connecting cable to the display unit in a manner that it is protected against damage.

Description of the connection cable:

terminal Colour State

EXC+ [IN+] red voltage +

SIG + [OUT+] green signal +

SIG -[OUT-] white signal -

EXC -[IN- ] black voltage -

8 Operation

Information about

• Network connection (power is supplied via the connecting cable of the display unit)

• Initial Commissioning

• Connection of peripheral devices

• Adjustment, linearization and verification (only the complete balance is

verifiable, i.e. weighing bridge in conjunction with a suitable display unit)

and the correct operation you will in the operating instructions included in the scope of delivery of the display unit.

So a continuous optimal performance is guaranteed:

• Avoid falling load, shock loads and impacts from the side!

• For weighing operation, all objects must be placed

centrically of the weighing bridge and may not hang over the edges or the ramps.

• Check adjustment at regular intervals.

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8.1 Operation limits

• The weighing bridges are designed extremely robust. However the load limits according to the following table should not be exceeded!

• Depending on the type of load receptacle, the static carrying capacity, i.e. the maximum admissible load is:

Weighing ranges 600kg 1500kg

With centrical load

With side stress 2000kg 3000kg

With one-sided loading 1000kg 1500kg

With single-wheel load 400kg 800kg

8.2 Operation with access ramps

• The load plate of the weighing bridge is an active weighing element, the access ramps are passive, i.e. during the weighing process all wheels of the conveying vehicles must rest on the load plate.

3000kg 4500kg

8.3 Load/unload weighing bridge

• Place the load on the scales using a lifting truck, a crane or a forklift truck. Ensure that the load is not swinging when it is placed onto the scales.

• Lift the load first vertically at least 10 cm above the scales before it is removed or newly placed.

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9 Service, maintenance, disposal

Before any maintenance, cleaning and repair work disconnect the appliance from the operating voltage.

9.1 Daily check

Ö Ensure that all four feet are in contact with the floor.

Ö Ensure that the connecting cable to the display unit and the network connection

cable of the display unit are not damaged.

Ö Ensure that the balance is free from dirt, especially under the edges of the

balance.

9.2 Cleaning

Ö Remove regularly corrosive substances.

Ö Keep IP protection.

Ö Protect weighing cells against splash water.

Ö Wipe the surfaces with a damp cloth.

Ö Only use common household cleaners.

Ö Do not use water jet or high-pressure cleaner.

9.3 Service, maintenance

Ö The appliance may only be opened by trained service technicians who are

authorized by KERN.

Ö Ensure that the weighing system is regularly calibrated, see chap. 4.5 Testing

instruments control.

9.4 Disposal

Ö Disposal of packaging and appliance must be carried out by operator according to

valid national or regional law of the location where the appliance is used.

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9.5 Instant help

In case of an error in the program process, briefly turn off the balance and disconnect from power supply. The weighing process must then be restarted from the beginning.

Help:

Fault Possible cause

The displayed weight is permanently changing

The weighing result is obviously incorrect

Should other error messages occur, switch balance off and then on again. If the error message remains inform manufacturer.

• Draught/air movement

• Floor vibrations

• Weighing plate has contact with other

objects.

• Electromagnetic fields / static charging (choose different location/switch off interfering device if possible)

• No zero display with unloaded balance

• Adjustment is no longer correct.

• Great fluctuations in temperature.

• Weighing bridge on an uneven surface.

• Electromagnetic fields / static charging

(choose different location/switch off interfering device if possible)

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10 Service documentation

• This chapter is only intended for a balance specialist!

• At every corner of the weighing bridge a DMS weighing cell is installed.

• The analogue-digital transformation occurs in the display unit. Also all

the balance and country-specific data are stored there.

10.1 Overview, setting regulation, tolerances

Testing and setting regulations:

Capacity 600 kg 1500 kg

Readability 200 g 500 g

Min 4 kg 10 kg

Max 600 kg 1500 kg

1/3 corner load 200 kg 500 kg

Tolerance 200 g 500 g

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Verification data and tolerances as per OIML

0,4

[g]

0,3

0,2

0,1

-0,1

-0,2

-0,3

-0,4 0 100 200 300 400 500 600

600 kg

1500 kg

[g]

0,75

0,5

0,25

-0,25

-0,5

-0,75

-1 0 500 1000 1500

[kg]

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10.2 Check and adjustment of the corner load

Check of the corner load:

• Place the test weights in the centre of the load plate and tare.

• The balance displays -0-.

• Place the test weights successively on all four

corners.

• Now the deviations are displayed with sign, write down the values. If there are deviations out of the tolerances (see chap. 9.1), an adjustment will be necessary.

Adjustment of corner load:

Preparation:

• For a better control of the modifications which occur during adjustment, select in the configuration menu the highest readability for control purposes.

• Open connection box

Adjustment rule: The corner (weighing cell) with the biggest negative deviation must be set to zero. Do not re-adjust this corner even after several adjustment sequences.

Adjustment on the analogue print

Adjustment of the weighing cells pair of potentiometers 8 and 7. Adjustment of the weighing cells Y occurs on the pair of potentiometers 1 and 2. Adjustment of the weighing cells Z occurs on the pair of potentiometers 9 and 10. Adjustment of the weighing cells [ occurs on the pair of potentiometers 3 and 4.

• Increase the value turning to the right, Reduce the value turning to the left.

Both potentiometers must be adjusted by the same number of turns.

X occurs on the

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11 Preload, Deadload and Overload settings

Kern model max. Preload* (kg)

* = additive preload

Deadload** (kg)

**= already applied preload

KFD 600V20M KFD 600V20LM KFD 1500V20M KFD 1500V20LM

0 100kg 0 0 500 kg 0 160kg 0 0 500 kg 0 100kg 0 0 1000 kg 0 160kg 0 0 1000 kg

Platform type Platform dimension

(mm)

KFD 600V20M 1000x1000 H8C D09-03.19R2 C3

KFD 600V20LM 1200x1200 H8C D09-03.19R2 C3

KFD 1500V20M 1000x1000 SQB TC6911 C3

KFD 1500V20LM 1200x1200 SQB TC6911 C3

Loadcell TC Max E Type No. Preload -1 -4 -3 (kg)

Class

Center Overload Protection circa (kg)

max

(kg) (kg) (g)

500kg 0 15000 3000

1000kg 0 10000 3000

Y n Dead-load T

min

Corner Overload Protection circa (kg)

100kg

160kg