Operating instructions Counting scale KERN VC

KERN & Sohn GmbH
Ziegelei 1
D-72336 Balingen
E-Mail: info@kern-sohn.com
Tel: +49-[0]7433- 9933-0
Fax: +49-[0]7433-9933-149
Internet: www.kern-sohn.com
Operating instructions
Counting scale
KERN VC
Version 1.2
01/2002
GB
VC-BA-e-0212
GB
KERN VC
Version 1.2 01/2002
Operating instructions
Counting scale
Table of contents
1
Technical data..............................................................................................................3
1.1
2
KERN VC Electronic counting balance ........................................................................... 3
Installation of the balance...........................................................................................4
2.1
Unpacking and package volume....................................................................................... 4
2.2
Installation .......................................................................................................................... 4
3
Power supply ...............................................................................................................4
3.1
Power connection .............................................................................................................. 4
3.2
Battery operation................................................................................................................ 4
4
Controls........................................................................................................................ 5
4.1
Overview of displays and indicators ................................................................................ 5
4.2
Overview of the keypad ..................................................................................................... 6
5
Adjustments.................................................................................................................7
5.1
Requirements: .................................................................................................................... 7
5.2
Adjustment procedure ....................................................................................................... 8
6
Control functions.........................................................................................................9
6.1
Turning the balance on and off......................................................................................... 9
6.2
Zeroing the balance ........................................................................................................... 9
6.3
Taring ................................................................................................................................ 10
6.4
Manual tare ....................................................................................................................... 10
6.5
Parts counting .................................................................................................................. 11
6.5.1
6.5.2
6.5.3
Known reference weight .............................................................................................................12
Clearing the reference quantity...................................................................................................12
Storing the reference weight with the Preset key .......................................................................13
6.6
Displaying the gross weight............................................................................................ 13
6.7
Totalling ............................................................................................................................ 14
6.7.1
6.7.2
Clear stored values.....................................................................................................................15
Automatic shutoff ........................................................................................................................15
7
Important information ...............................................................................................16
8
Minor breakdown .......................................................................................................17
9
Declaration of Conformity.........................................................................................18
10
2
Safety seal for calibration ......................................................................................19
VC-BA-e-0212
1
Technical data
1.1
KERN VC Electronic counting balance
KERN
Readout
VC 3K1M
VC 6K2M
VC 15K5M
VC 30K10M
1g
2g
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
3 kg (M1)
6 kg (M1)
15 kg (M1)
30 kg (M1)
Adjusting weight
(not included) (clase)
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
Weight kg (net)
VC-BA-e-0212
330 x 245
4,4
3
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.
4
VC-BA-e-0212
4
Controls
4.1
Overview of displays and indicators
A
Weight display (in kg).
C
Number of units
B
A
I
II
III
B
IV
V
Reference weight of 1000 units in kg.
(unit weight per 1000 units)
C
VI
I
Zeroing indicator
IV
Error indicator
Lights when the number of pieces is
insufficient (INSUFF)
II
Net indicator
Lights when the tare value is valid.
V
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.
VI
Memory indicator (MEM)
Lights when there is data in the
totalling memory
VC-BA-e-0212
5
4.2
Overview of the keypad
ON/OFF button
ON
OFF
WEIGHT
Preadjust key (1, 2, ... 6)
Calls up stored reference weights
->0<-
+
Plus key
Add when totalling
TARE
-
Minus key
Subtract when totalling
Pcs
Clear total key
Clears the memory values when
totalling
0-9
1
*
NET/
GROSS
6
UNIT
Net/gross weight key
Toggles between net and gross
weight
Specification of piece weight
by numeric input
Zeroing key
Tare key
Parts key
Numeric keys
Clear key
C
VC-BA-e-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
Note!
Requirements:
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-e-0212
7
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.
1. Requirements:
Turn the adjustment switch on;
see Chapter 5 "Adjustments".
2. Press the {->0<-} key and hold down.
While holding the {->0<-} key, press the
8 7 1 5 keys in succession.
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.
kg
Display
kg/1000
Pcs
DC688
VrX.XX
S - ON
CAL 00
-----
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
7. Use the {*} key to store the data.
--------
8. The adjustment weight (e.g., 10 kg) will
then appear on the display.
10,000
10
0
9. Remove the adjustment weights to
complete the adjustment process.
Balance precision should be checked regularly when using the balance for qualityrelated applications.
8
VC-BA-e-0212
0
6
Control functions
6.1
Turning the balance on and off
kg
Display
kg/1000
8888800
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
2. Once the weight appears on the Display, the
balance is ready for weighing.
-
0,000
6.2
-
0
Pcs
88888800
0
-
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-ofrange. The balance can be set to “0.00“ by “TARE“.
kg
Display
kg/1000
Pcs
0,005
0
0
0,000
0
0
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.
2. During reinitialisation, horizontal eights (8)
will be displayed and after a brief wait, the
balance will be set to zero.
VC-BA-e-0212
9
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
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
Kg
0
kg/1000
1,2 46
Pcs
-1,246
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.
6.4
Manual tare
If the actual tare weight is known, use the numeric keys to enter this value.
Display
1. Example : Tare 1.246 kg.
Enter this value from the keypad.
2. Press the {TARE} key to start the tare operation.
10
VC-BA-e-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.
kg
Display
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
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.
VC-BA-e-0212
0,614
122,68
5
11
kg
Display
kg/1000
Pcs
1,996
122,68
16
Note:
If no reference can be created because the item
being weighed is too unstable or the reference
weight is too small, the balance display will
indicate "ADD".
In this case, place the desired number of units
on the weighing plate and confirm by pressing
the {Pcs} key.
7. Then add more parts until reaching the desired
quantity.
The display will indicate the total weight, the total
weight of 1000 units and the weighed units.
6.5.1
Known reference weight
If you know the reference weight of 1000 units, use the keypad to enter the weight.
For example, let's assume a weight of 1.7266 kg for 1000 units.
kg
Display
kg/1000
Pcs
1. Enter 17266 and press the
{UNIT/WEIGHT} key.
0,000
1,72
0
2. Then place the parts to be counted on the plate.
The computed number of units will be displayed.
0,278
1,72
161
kg
Display
kg/1000
Pcs
1. Initial data
0,278
1,72
161
2. To clear the reference quantity, press the {C} key.
0,278
0
0
6.5.2
Clearing the reference quantity
The weight of 1000 units and the number of units will
be displayed as zero.
12
VC-BA-e-0212
6.5.3
Storing the reference weight with the Preset key
Six (6) memory registers are available for storing the reference weights of 1000 units.
kg
Display
kg/1000
0
1,2 53
0,000
1,25
0
1,25
30
0,000
1,25
0
kg
Display
kg/1000
Pcs
1. Place the empty weighing container on the plate,
tare it and then add the item being weighed to the
container. The balance will display the net weight.
0,480
0
0
2. Press the {NET/GROSS} key.
The balance displays the gross weight (item being
weighed plus tare). This is indicated by “GROSS“.
0,614
0
0
3. Whenever the {NET/GROSS} key is pressed, the
balance toggles between net and gross weight.
0,480
0
0
1. Enter the reference weight to be stored (e.g.,
1.253 kg).
2. Confirm the entry by pressing the
{UNIT/WEIGHT} key.
3. Press the {UNIT/WEIGHT} key again.
4. Select one of the six memory keys
(e.g., 1). Press the Preset 1 key.
UE
Pcs
If the reference weight is needed later, it can be
retrieved by pressing the {PRESET} 1 key.
6.6
Displaying the gross weight
VC-BA-e-0212
13
6.7
Totalling
This function allows you to perform several weighing operations. The total number of
units and the quantity of weighing operations is then displayed.
kg
Display
kg/1000
Pcs
1. Select a reference weight (e.g., 3.56 kg) (see
Chapter 6.5.3 “Reference weight with PRESET
key“).
0,000
3,56
0
2. Place the weighing container on the balance.
0,110
3,56
31
3. Press the {TARE} key to tare the container.
0,000
3,56
0
4. Add the desired quantity of parts for the first
weighing operation to the weighing container (e.g.,
0.060 kg).
0,060
0
17
total
1
17
6. Remove the items from the balance.
0,000
3,56
0
7. Place the desired number of parts for the second
weighing operation in the weighing container (e.g.,
0.488 kg).
0,488
3,56
137
total
2
154
0,296
3,56
83
Corr
1
83
5. Press the {+} key to add and store the data.
8. Press the {+} key to add and store the data.
9. Place the desired number of parts for the third
weighing operation in the weighing container (e.g.,
0.296 kg).
10. Press the {-} key to subtract and store the data.
If necessary, weigh other parts as described above. Note! The parts must be
removed from the balance between weighing operations.
Once all lots have been weighed, all data (number of weighing operations) are
available by simply pressing the {+} key.
11. Press the {+} key to display the total data.
14
total
1
VC-BA-e-0212
71
6.7.1
Clear stored values
Remove the items from the balance and confirm with the * key. The stored values,
total number of units and number of weighing operations will all be set to zero.
6.7.2
Automatic shutoff
The balance can be shut off automatically, if desired. Depending on the display
setting, this option can be used to turn the balance off 3, 10, 30 , 60 or 180 minutes
after the apparatus is last used.
Setting the automatic shutoff feature
kg
Display
kg/1000
Pcs
1. Press the {->0<-} key and hold down. While
holding the {->0<-} key, press the 1, 4, 1 keys in
succession.
SPC00
0000
0000
2. Press the 0101 key; this means that the display
will shut off after 180 minutes.
For other settings, refer to the following table.
SPC01
0000
0101
3. Use the {*} key to store the data.
SPC01
0000
0000
0,000
0
0
4. Use the {TARE} key to finish the setting
procedure, the balance will return to weighing
mode.
Table: automatic shutoff times
0000 = the display does not shut off
0001 = display shuts off after 3 min.
0010 = display shuts off after 10 min.
0011 = display shuts off after 30 min.
0100 = display shuts off after 60 min.
0101 = display shuts off after 180 min.
VC-BA-e-0212
15
7
Important information
These electronic scales are a precision instrument. Electromagnetic fields can cause
major display discrepancies. The scales must then be repositioned away from
electromagnetic fields. All sources of environmental interference, such as drafts and
vibrations, should be avoided. Sudden changes of temperature should be avoided.
The scales must be reset to match changes in temperature.
The scales are not hermetically sealed, therefore avoid high humidity, steam and
dust. Do not bring liquids into direct contact with the scales, as these can penetrate
into the measuring mechanism. Cleaning material should only be dry or barely damp.
Do not use solvents as these can damage paintwork or other plastic parts. Remove
damaged items immediately from the scales.
The measuring mechanism will be stabilised by allowing the scales to warm up for a
few minutes after switching them on. Place items to be weighed carefully on the
scales. Do not place objects on the weighing platform for any period of time, apart
from normal use. Sudden shocks or overloading the scales beyond the maximum
permitted weight should absolutely be avoided, balance could be damaged.
In case of problems operating the weighing program, switch the scales briefly off and
on. The weighing set-up must then be restarted right from the beginning.
Never operate the scales in areas where there is a danger of explosion, the models
in this series are not protected against explosion.
Check the scales regularly against, known, external test weights.
Opening the scales or failing to use them in accordance with the written
instructions will invalidate the warranty.
Please keep all packaging material for possible return of the scales. Scales must only
be returned in their original packaging.
16
VC-BA-e-0212
8
Minor breakdown
Breakdown
Possible causes
No indication.
• Balance is not switched on.
• The power connection is cut off (power
cable is defective or not properly inserted).
• Power cut.
Weight indication is changing
• Air movements
Permanently
• Table/Floor vibrations
• The pan is in contact with an alien foreign
particle.
Weighing result is obviously faulty
• The balance display is not zero
• The adjusting is no longer correct
• Temperature deviations.
If any other error messages appear turn off the balance and on again. When the error
message still appear please contact the manufacturer.
VC-BA-e-0212
17
9
Declaration of Conformity
Declaration of Conformity
The non-automatic electronic counting balances
Type: KERN VC 3K1M KERN VC 6K2M KERN VC 15K5M KERN VC 30K10M
Certificate no. for tests relating to the
T 5784
authorisation of EC construction type:
Test centre
NMI
Correspond to the following EC requirements:
EC Directive relating to balances
EC EMC directive (directive relating to
electromagnetic compatibility)
EC Directive relating to low voltage
Version 90/384/EWG
Version 89/336/EWG
Version 73/23/EWG
Compatible norms are, in particular
EN 45501
EN 55022
EN 60950
This declaration shall be valid only if accompanied by
a certificate of conformity issued by a stated centre
If a change is made to the above mentioned appliances without consulting KERN this
declaration will become invalid.
Date: 15. January 2001
Signed:
Gottl. KERN & Sohn GmbH
Management
Gottl. KERN & Sohn GmbH, Ziegelei 1, D-72322 Balingen-Frommern, Tel. +49-07433/9933-0, Fax +49-07433/9933-149
18
VC-BA-e-0212
10
Safety seal for calibration
A
Safety seals
(self-sticking seal (B) or
lead (A))
VC-BA-e-0212
19