KERN KERN VC 3K1M Bedienungsanleitung

E KERN VC

Version 1.2 01/2002

Operating instructions

Electronic counting balance

Table of contents

1Technical data 21

1.1 KERN VC Electronic counting balance 21

2Installation of the balance 22

2.1 Unpacking and package volume 22

2.2 Installation 22

3Power supply 22

3.1 Power connection 22

3.2 Battery operation 22

4Controls 23

4.1 Overview of displays and indicators 23

4.2 Overview of the keypad 24

5Adjustments 25

5.1 Requirements: 25

5.2 Adjustment procedure 26

6Control functions 27

6.1 Turning the balance on and off 27

6.2 Zeroing the balance 27

6.3 Taring 28

6.4 Manual tare 28

6.5 Parts counting 29

6.5.1 Known reference weight 30

6.5.2 Clearing the reference quantity 30

6.5.3 Storing the reference weight with the Preset key 31

6.6 Displaying the gross weight 31

6.7 Totalling 32

6.7.1 Clear stored values 33

6.7.2 Automatic shutoff 33

7Important information 34

8Minor breakdown 35

9Declaration of Conformity 36

10 Safety seal for calibration 37

VC-BA-defsin-0212 20

1 Technical data

1.1 KERN VC Electronic counting balance

KERN VC 3K1M VC 6K2M VC 15K5M VC 30K10M

Readout 1 g 2 g 5 g 10 g

Weighing range 3000 g 6000 g 15000 g 30000 g

Taring range (subtractive) 3000 g 6000 g 15000 g 30000 g

Min. piece weight at parts

counting

0,1 g 0,2 g 0,5 g 1 g

Adjusting weight

(not included) (clase)

3 kg (M1) 6 kg (M1) 15 kg (M1) 30 kg (M1)

Operating temperature - 10° C .... +40° C

Air humidity +15° C .... +85° C

Case (W x D x H) mm 343 x 367 x 119

Weighing plate mm 330 x 245

Weight kg (net) 4,4

VC-BA-defsin-0212 21

2 Installation of the balance

2.1 Unpacking and package volume

Remove the balance from the packing materials carefully, take off the plastic cover and set

up the balance at the work site.

Keep all packing materials for future transport of the balance.

Standard accessories:

KERN VC

• Balance

• Weighing plate

• Power cord

• Instruction manual

2.2 Installation

• Put the weighing plate on the balance such that the holes match the pins on the

weighing plate.

• Set the balance on a stable surface.

• Make sure the balance is level by adjusting the foot screws until the air bubble

(at the left front of the body) is inside the circle.

3 Power supply

3.1 Power connection

Connect the adapter cord to the bottom of the balance.

Before plugging the cord into the socket, make sure that the voltage setting on the balance

is the same as the mains voltage.

3.2 Battery operation

Remove the battery cover at the bottom of the balance. Insert six (6) 1.5V batteries (size

D). Replace the battery cover.

If the balance will not be used for an extended period of time, remove the batteries and

store them separately. Battery acid leaks could damage the balance.

VC-BA-defsin-0212

4 Controls

4.1 Overview of displays and indicators

A Weight display (in kg).

B Reference weight of 1000 units in kg.

(unit weight per 1000 units)

C Number of units

A B

I II III IV V VI

Zeroing indicator

Error indicator

Lights when the number of pieces is

insufficient (INSUFF)

Net indicator

Lights when the tare value is valid.

Recompute indicator (RECOMP)

Lights when the unit weight can be

recomputed by pressing the PCS

key.

III

Gross weight (GROSS)

Lights when the gross weight is

displayed.

Memory indicator (MEM)

Lights when there is data in the

totalling memory

VC-BA-defsin-0212 23

4.2 Overview of the keypad

ON/OFF button

UNIT

WEIGHT

Specification of piece weight

by numeric input

Preadjust key (1, 2, ... 6)

Calls up stored reference weights

->0<-

Zeroing key

Plus key

Add when totalling

TARE

Tare key

Minus key

Subtract when totalling

Pcs

Parts key

Clear total key

Clears the memory values when

totalling

0 - 9

Numeric keys

NET/

GROSS

Net/gross weight key

Toggles between net and gross

weight

Clear key

VC-BA-defsin-0212

5 Adjustments

The adjustment weights can be used to check and adjust balance precision at any time.

Adjustment weights can be acquired from KERN as an optional component. To decide

which adjustment weights are required, refer to Chapter 1 “Technical Data“.

5.1 Requirements:

Note! In calibrated apparatus, the adjustment switch can only be accessed by

destroying the safety seal. This would void the calibration.

• The adjustment switch is

located next to the screw

of the right front foot,

below the balance.

• Press with a long, blunt

object (e.g., tip of a

ballpoint pen) inside the

threaded hole.

• Turn the adjustment

switch on; the balance is

ready to be adjusted.

VC-BA-defsin-0212 25

5.2 Adjustment procedure

Check that the surrounding conditions are stable, see “Important instructions“.

A short warm-up time of about 1 minute is recommended for stabilisation.

Display

kg kg/1000 Pcs

1. Requirements:

Turn the adjustment switch on;

see Chapter 5 "Adjustments".

DC688 VrX.XX S - ON

2. Press the {->0<-} key and hold down.

While holding the {->0<-} key, press the

8 7 1 5 keys in succession.

CAL 00

3. Make sure there is no weight on the weighing

plate. Press the {*} key.

- - - - -

4. The zero point is stored.

CAL SP will subsequently appear.

CAL SP

5. Place the necessary adjustment weight on the

weighing plate (see Chapter 1, “Technical

Data").

6. Enter the adjustment weight

(e.g., 10 for 10 kg).

CAL SP 10

7. Use the {*} key to store the data.

--------

8. The adjustment weight (e.g., 10 kg) will

then appear on the display.

9. Remove the adjustment weights to

complete the adjustment process.

10,000 0 0

Balance precision should be checked regularly when using the balance for quality-related

applications.

VC-BA-defsin-0212

6 Control functions

6.1 Turning the balance on and off

Display

kg kg/1000 Pcs

1. To turn the balance on, press the

{ON/OFF} key.

The balance will perform a self-test.

While reinitialising, horizontal eights (8) will

appear on the display.

- 88888 8888800 88888800

2. Once the weight appears on the Display, the

balance is ready for weighing.

- 0,000 - 0 - 0

6.2 Zeroing the balance

Due to environmental influences, the balance may not display exactly "0.00“ even when

the weighing plate is empty. Nevertheless, you can zero the balance display at any time to

ensure that weighing actually starts at zero. Zeroing with some weight on the balance can

only be done within a certain range, depending on type. If the balance does not allow

zeroing with the weight on the plate, the weight is out-of-range. The balance can be set to

“0.00“ by “TARE“.

Display

kg kg/1000 Pcs

1. If the balance does not display zero exactly

even when the weighing plate is empty,

press the {->0<-} key. The balance will start

reinitialising at zero.

0,005 0 0

2. During reinitialisation, horizontal eights (8)

will be displayed and after a brief wait, the

balance will be set to zero.

0,000 0 0

VC-BA-defsin-0212 27

6.3 Taring

The weight of the containers used for weighing can be tared by pressing a button, such

that the net weight of the item being weighed is displayed in subsequent weighing

operations.

Display

kg kg/1000 Pcs

1. Place the empty container to be tared on the

weighing plate. The total weight of the container

will be displayed.

0,284 0 0

2. Press the {TARE} key to start the tare operation.

0,000 0 0

3. After taring is finished, zero is displayed along

with the NET symbol that indicates net weight.

0,000 0 0

Note

The balance is ready to be used.

The balance can only store one tare value.

When the balance is empty, the stored tare

value will be displayed with a negative sign. To

clear the stored tare value, empty the weighing

plate and then press the

{TARE} key.

4. Place the item being weighed in the tare

container.

0,000 0 0

5. Read the weight on the display. 0,550 0 0

6.4 Manual tare

If the actual tare weight is known, use the numeric keys to enter this value.

Display

Kg kg/1000 Pcs

1. Example : Tare 1.246 kg.

Enter this value from the keypad.

0 1,2 46

2. Press the {TARE} key to start the tare operation.

-1,246 0 0

VC-BA-defsin-0212

6.5 Parts counting

During parts counting, parts can be added or subtracted from a container. The operating

sequence is divided in four steps in both types of counting:

• Taring of the weighing container

• Defining the reference quantities

• Weighing the reference quantities

• Counting the parts

Both types of parts counting are described below.

Display

kg kg/1000 Pcs

1. Place the weighing container on the balance.

0,284 0 0

2. Press the {TARE} key to tare the container.

0,000 0 0

3. In order to count parts, the balance needs to

know the weight of a certain quantity of parts.

Fill an empty weighing container with a certain

number of units (reference quantity)

0,614 0 0

4. Use the numeric keys (e.g., 5) to enter the

reference quantities.

0,614 0 0

5. Press the {Pcs} key to store the number of

pieces.

Note:

We recommend that you use the largest possible

reference quantity. The balance computes the

mean weight per unit and stores it as the

reference weight. It is unlikely that all units have

exactly the same weight and, therefore, the

reference weight will be more accurate when the

reference quantity is higher.

6. Once the reference has been properly entered,

the balance displays the reference quantity and

the total weight of 1000 units.

0,614 122,68 5

VC-BA-defsin-0212 29

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