KERN FKB-BA-e-2111 High-Resolution Bench Scale Instruction Manual

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FKB-BA-e-2111

7.7 Connection of peripheral devices
Before connecting or disconnecting of additional devices (printer, PC) to the data interface, always disconnect the balance from the power supply.
With your balance, only use accessories and peripheral devices by KERN, as they are ideally tuned to your balance.
7.8 Initial Commissioning
In order to obtain exact results with the electronic balances, your balance must have reached the operating temperature (see warming up time chap. 1). During this warming up time the balance must be connected to the power supply (mains, accumulator or battery).
The accuracy of the balance depends on the local acceleration of gravity.
Strictly observe hints in chapter Adjustment.
7.9 Adjustment
As the acceleration value due to gravity is not the same at every location on earth, each display unit with connected weighing pan must be coordinated – in compliance with the underlying physical weighing principle – to the existing acceleration due to gravity at its place of location (only if the weighing system has not already been adjusted to the location in the factory). This adjustment process must be carried out for the first commissioning, after each change of location as well as in case of fluctuating environment temperature. To receive accurate measuring values it is also recommended to adjust the display unit periodically in weighing operation.
· Arrange the required adjustment weight, see chap. 1. Carry out adjustment as near as possible to the highest load of the balance (recommended adjustment weight see chap. 1). Weights of different nominal values or tolerance classes may be used for adjustment but are not optimal for technical measuring. The accuracy of the adjustment weight must correspond approximately to or, if possible, be better than, the readability [d] of the balance. Info about test weights can be found on the Internet at: http://www.kern-sohn.com
· Observe stable environmental conditions. A warming up time (see chapter 1) is required for stabilization.
· Ensure that there are no objects on the weighing pan.
7.9.1 External adjustment
Observe stable environmental conditions. A warm up time (see chapter 1) is
required for stabilization.
Ensure that there are no objects on the weighing pan. To invoke the setup menu press the TARE and ON/OFF button at the same time
and keep them pressed until the first menu item < Cal> will be displayed.
Navigation key Press button, will be displayed.

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Navigation key Press button, the first selectable adjustment weight will be
displayed.
Use the navigation keys to select the desired adjustment weight, see chap. 1
,,Adjustment points” or ,,Recommended adjustment weight”
Prepare the required adjustment weight.
Acknowledge selection by button. < Zero >, < Pt ld > followed by the
weight value of the adjustment weight to be placed will be displayed.
Place the adjustment weight and confirm with button,

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8 Basic Operation
8.1 Turn on/off Start-up:
Press the ON/OFF button.
The display lights up and the balance carries out a selftest. Wait until the weight display appears, then the balance is ready for weighing.
Switch off:
Keep ON/OFF button pressed until the display disappears
8.2 Simple weighing
Check zero display [>0<] and set to zero with the help of the ZERO­key, as
required.
Place goods to be weighed on balance. Wait until the stability display appears ( ). Read weighing result.
Overload warning Overloading exceeding the stated maximum load (max) of the device, minus a possibly existing tare load, must be strictly avoided. This could damage the instrument. Exceeding the maximum load is indicated by
. Unload balance or reduce preload.
8.3 Weighing with tare
8.3.1 Taring The dead weight of any weighing container may be tared away by pressing a button, so that the following weighing procedures show the net weight of the goods to be weighed.
Put the weighing container on the weighing pan Wait until the stability display appears ( ), then press TARE key.
The weight of the container is now internally saved. The zero display and the indicator ,,NET” will appear. ,,NET” informs that all shown weight values are net values.
Weigh the material. Wait until the stability display appears ( ). Read net weight.

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· When the balance is unloaded the saved taring value is displayed with negative sign.
· To delete the stored tare value, remove load from weighing pan and press the TARE button.
· The taring process can be repeated any number of times, e.g. when adding several components for a mixture (adding). The limit is reached when the taring range capacity is full.
· Numeric input of the tare weight (PRE-TARE), see chap. 10.1.2.2
8.4 Underfloor weighing Objects unsuitable for placing on the weighing scale due to size or shape may be weighed with the help of the flush-mounted platform. Proceed as follows:
Switch off the balance. Open closing cover (1) at the balance bottom. Place weighing balance over an opening. Completely screw-in the hook Hook-on the material to be weighed and carry out weighing.
CAUTION
· Always ensure that all suspended objects are stable enough to hold the desired goods to be weighed safely (danger of breaking).
· Never suspend loads that exceed the stated maximum load (max) (danger of breaking)
Always ensure that there are no persons, animals or objects that might be damaged underneath the load.
NOTICE
After completing the underfloor weighing the opening on the bottom of the balance must always be closed (dust protection).

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9 Operating concept
From factory the balance is delivered with various applications (normal weighing, check weighing, counting). After the first start-up the balance is in the application.

In the application menu (see chap.13.2.) however, you can define, selecting an application, in which mode the balance after switching-on has to continue working. Either as per standard in weighing mode or e.g. as check balance or counting balance
Note: The number of the installed applications depends on the model.

Selecting an application:
Press the TARE button and keep it pressed until the first menu item will be
displayed
Use the TARE button to select the menu setting < mode > and acknowledge with
button. The current setting will be displayed.
Use the TARE button to select the desired mode, selectable

weig h Weighing mode

count

Counting mode

check Check mode
Confirm with button.
According to the selected application in the application menu just appear the application-specific settings, so that you reach the target quickly without detour.

· Information about the application-specific settings you will find in the description of the respective application.
· All basic settings and parameters, which influence the whole operation of the balance, are resumed in the Setup Menu (see chap.13.3.). These settings remain valid for all applications.

Change application:
Press and hold TARE button until the first setup menu item is displayed
Use the TARE button to select the menu setting < mode > and acknowledge with
button. The current setting will be displayed.
Use the TARE button to select the desired mode and acknowledge
with button.

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10 Application
How to carry out a simple weighing and taring, please refer to chap. 8.2 or 8.3. Further specific settings you will find in the following chapters.
Shouldn’t the application already be enabled, select the menu setting < mode weig h >, see chap. 9

10.1 Application-specific settings + Navigation in the application menu see chap. 13.1

10.1.1 Overview
Press the TARE button and keep it pressed until the first menu item <
pretare > will be displayed

Level 1 Ptare PRE-TARE
hold Unit Units
Mode Applications see chap. 9.

Level 2
actuAl
manuAl CLEAR
–
g kg lb gn dwt ozt oz % Free factor
multiplication factor
Pcs weigh count check

Level 3 Description / Chapter Take over the placed weight as PRE-TARE value, see chap. 10.1.2.1 Numeric input of the tare weight, see chap. 10.1.2.2. Delete PRE-TARE value Start-Hold function This function defines in which weighing unit the result will be displayed. In verified models not all the weighing units are available, see chap. 1.
Application Application Application

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10.1.2 Description of individual functions
10.1.2.1 Take over the placed weight as PRE-TARE value, < Ptare actuel >
Deposit weighing container Invoke menu setting < Ptare > and confirm by button. To take over the placed weight as a PRE-TARE value, use the navigation keys
to select < actuel >
Confirm with button. < wait > is displayed. The weight of the weighing container is stored as tare weight. Remove the weighing container, the indicator (NET) and the tare weight with
minus sign will appear.
Place the filled weighing container. Wait until the stability display appears ( ). Read net weight.
The entered tare weight remains invalid until a new tare weight is input. To delete press the TARE key or confirm the menu setting < clear > using the button.

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10.1.2.2 Enter the known tare weight numerically < Ptare manuel >
Invoke menu setting < Ptare > and confirm by button. Use the navigation keys to select the setting < manuel > and confirm with
button.
Enter the known tare weight, numeric input see chap. 3.2.2 The input weight is automatically saved as tare weight, the indicator (NET) and the
tare weight with minus sign will appear.
Place the filled weighing container. Wait until the stability display appears ( ). Read net weight.
The entered tare weight remains invalid until a new tare weight is input. To delete enter the zero value or confirm the menu setting using the button.
10.1.2.3 Data-Hold function < hold >
Invoke menu setting < hold > Place goods to be weighed on balance. Confirm with button. The first stable weighing value is kept for 15 s, symbolised by [HOLD] in the upper
edge of the display.

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11 Application
Shouldn’t the application already be enabled, select the menu setting < mode count >, see chap. 9

11.1 Application-specific settings + Navigation in menu see chap. 13.1

11.1.1 Overview
Press the TARE button and keep it pressed until the first menu item < ref > will
be displayed

Level 1 Ref Reference quantity
Ptare

Level 2
5 10 20 50 free input
actuAl

Level 3

Description / Chapter

Reference piece number 5 Reference piece number 10 Reference piece number 20 Reference piece number 50 Optional, numeric input, see chap. 3.2.2. Input unit weight

Take over the placed weight as PRE-TARE value, see chap. 10.1.2.1

manuAl CLEAR

Numerical input of the tare weight, see chap. 10.1.2.2.
Delete PRE-TARE value

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11.2 Using the application
11.2.1 Parts counting
Before the balance can count parts, it must know the average piece weight (i.e. reference). Proceed by putting on a certain number of the parts to be counted. The balance determines the total weight and divides it by the number of parts, the so-called reference quantity. Counting is then carried out on the basis of the calculated average piece weight.
· The higher the reference quantity the higher the counting exactness.
· Especially high reference must be selected for small parts or parts with considerably different sizes.
· Smallest counting weight see table ,,Technical data”
Procedure:
1. Calculate reference
Reference piece quantity 5, 10, 20 or 50:
If necessary, put on and tare the weighing container. Put on the desired quantity of reference pieces. Press the TARE button and keep it pressed until the first menu item < ref > will be
displayed
Confirm with button. Use the navigation keys to select the reference piece quantity (5, 10, 20, 50)
according to the placed reference and confirm with the button.
The balance will calculate the average item weight and then displays the quantity of
pieces.
Remove reference weight. The balance is now in parts counting mode counting all
units on the weighing pan.
Reference piece quantity user-defined:
If necessary, put on and tare the weighing container. Put on the desired quantity of reference pieces. Press the TARE button and keep it pressed until the first menu item < ref > will be
displayed
Confirm with button. Use the navigation keys to select the reference piece quantity < free > and
confirm with button.
The numeric input window appears. Enter and confirm the quantity of the placed reference parts, numeric input see
chap. 3.2.2

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The balance will calculate the average item weight and then displays the quantity of
pieces.
Remove reference weight. The balance is now in parts counting mode counting all
units on the weighing pan.
Numerical input of the reference piece count::
In Iweighing mode, press and hold the TARE key until the first menu item < ref

is displayed.
Confirm with the key.. Select unit and confirm with key Select the input of the piece weight with the navigation keys and confirm
with -key.
Enter the desired reference sample quantity and confirm with the TARE key. The reference sample quantity is now set
2. Parts counting
Put the empty container on the weighing pan and press the TARE button. The
container is tared, the zero display will appear.
Fill the counting quantity. The piece quantity is shown in the display.
With the – key you can switch between number of items and weight display

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12 Application
Shouldn’t the application already be enabled, select the menu setting < mode check >, see chap. 9

12.1 Application-specific settings + Navigation in menu see chap. 13.1
12.1.1 Overview
Press the TARE button and keep it pressed until the first menu item < limits

will be displayed

Level 1 limitS

Level 2
limlow

Level 3

Description / Chapter

Lower limit value, numeric input see chap. 3.2.2

Ptare PRE-TARE

limupp actuel manuel CLEAR

Upper limit value, numeric input see chap. 3.2.2 Take over the placed weight as PRE-TARE value, see chap. 10.1.2.1 Numeric input of the tare weight, see chap. 10.1.2.2. Delete PRE-TARE value

12.2 Using the application
With the application you can set an upper or lower limit value and thus ensure that the weighed load remains exactly within the set tolerance limits.
When limit values are exceeded below or above, an optical and acoustic signal will be displayed (if enabled in menu) Optical signal:
The tolerance marks provide the following information:

Target quantity exceeds defined tolerance

Target quantity within defined tolerance

Target quantity below defined tolerance

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Audio signal: The acoustic signal depends on the menu setting < setup beeper

, see chap. 13.3.1.
Procedure: 1. Define upper and lower limit value:
Make sure that the balance is in Checkweighing mode. If necessary, switch over
with the Select weighing unit for checkweighing mode

Press the TARE button and keep it pressed until the first menu item < limit >
will be displayed.
Confirm with button. < limlow > will be displayed. Press button to confirm, the numeric input window for entering the lower limit
value will appear. Enter the lower limit value for the target piece quantity (numeric input see chap. 3.2.2) and confirm with button. The balance returns to the < limlow > menu.
Use the navigation keys to select the setting < limupp > and confirm with
button.
The numeric input window for entering the upper limit value < will appear. Enter the
upper limit value for the target piece quantity (numeric input see chap. 3.2.2) and confirm with button. < limupp > will appear.
Press repeatedly button to exit menu.
Finished the setting works, the weighing balance is ready now for check weighing.
2. Start tolerance check:
Place the weighed material and check by means of the tolerance marks / acoustic
signal if the weighed material is within the defined tolerance.

Load below specified tolerance

Load within specified tolerance

Load exceeds specified tolerance

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13 Menu
13.1 Navigation in the menu Call up menu:
Application menu

Setup menu

Press the TARE button and keep it pressed until the first menu item will be displayed

Press the TARE and ON/OFF button at the same time and keep it pressed until the first menu item will be displayed

Select and adjust parameter:

Scrolling on one level

Use the navigation buttons to select the individual menu blocks one by one.
Use the navigation key to scroll down.
Use the navigation key to scroll up.

Activate menu item / Confirm selection

Press navigation key

Menu level back / back to weighing mode

Press navigation key

13.2 Application menu The application menu allows you a fast and targeted access to the respectively selected application (see chap. 9.).
· An overview of the application-specific settings you will find in the description of the respective application.

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13.3 Setup menu In the setup menu you have the possibility to adapt the behaviour of the balance to your requirements (e.g. environmental conditions, especial weighing processes). These settings are global and do not depend on the selected application.
13.3.1 Overview < setup >

Level 1 Cal Adjustment
com Communication

Level 2
calext caleud graadj grause
Rs232

Usb-d
WLAN

Level 3 Level 4 / Description

Description

For external adjustment, see chap. 0

External adjustment, user-defined, see chap. 7.9.2

Constant of gravity adjustment place numeric input see chap. 3.2.2

Constant of gravity installation place, numeric input see chap. 3.2.2

baud
data parity stop handsh protoc on

300 600 1200 2400 4800 9600 14400 19200 38400 57600 115200 128000 256000 7dbits 8dbits None Odd
even 1bit 2bits none kcp

off

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Print Data output
BEEPER Audio signal

intfce sum prmode
keys Check

Rs232 USB-d on off manual auto
cont format Layout
off on ok
low
high

RS 232 interface

USB device interface

Switch on / off add-up mode, see chap. 14.4.1

On, off
Data output by pressing the PRINT button (see chapter 14.4.2)

On, off
Automatic data output with stable and positive weighing value see chap.14.4.3. Another output only after zero display and stabilisation, depending on the settings < zRange >, selectable (off, 1, 2, 3,4,5)

On, off
Continuous data output depending on the set time interval < speed >, see chap. 14.4.4

short long

Standard measuring protocol Detailed measuring protocol

Not documented

Switch on / off acoustic signal by pressing button

off Slow Std Fast Cont. off Slow Std Fast Cont. off Slow Std Fast Cont.

Acoustic signal off Slow Standard Fast Continuous Acoustic signal off Slow Standard Fast Continuous Acoustic signal off Slow Standard Fast Continuous

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Autoff Automatic
switch-off function

mode

off Auto

Automatic switch-off function switched off
The balance is automatically switchedoff according to the time without load change or without operation defined in menu item < Time >

Only0

buttons Function button allocation
Blight Display background illumination

Time

30 s 1 min

2 min

5 min

30 min 60 min

Not documented

mode

always

timer

Automatic switch-off only with zero display After the set time without load change or operation the balance will switch off automatically
Background lighting of display is switched on permanently The background illumination is automatically switched-off according to the time without load change or without operation defined in menu item < Time >

No bl

Display background illumination always switched off

tarerg Taring range

Time
100%

10%

5 s 10 s 30 s 1 min 2 min 5 min 30 min

The background illumination of the display will switch off automatically after the set time without load change or operation

Defining the maximum taring range, you can choose 10­100%. To enter the numerical value

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ztrack Maintaining zero
reset

on

Automatic maintaining zero [< 3 d]

off

If the amount of the weighed material is reduced or increased significantly, the scale’s “stabilizing and compensating” mechanism can result in displaying erroneous weighing results! (e.g.: slow outflow of the liquid from the container placed on the scale, evaporating processes).
When dosing with small weight fluctuations, it is recommended to switch this function off.

Reset balance settings to factory settings

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14 Interfaces Via the interfaces weighing data may be exchanged with connected peripheral devices. Issue may be made to a printer, PC or control displays. In the same way, control commands and data inputs may occur via the connected devices (such as PC, keyboard, barcode reader).
The available interfaces can be used in a parallel manner.

14.1 Interface cable (RS232)

Connection
KERN Standard setting

Sub-D bushing 9 pol. (bushing = to balance)
Pin 1: VB Pin 2: TXD (RS232) Pin 3: RXD (RS232) Pin 4: VCC Pin 5: Signal ground (RS232) Pin 6: Low Signal (signal light “IN4”) Pin 7: Hi Signal (signal light “IN2”) Pin 8: OK Signal (signal light “IN1″) Pin 9: No assignment
· 8 Data bit
· 1 Stop bit
· No parity

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14.2 Connect printer
Turn off scale and printer. Use a suitable cable to connect the weighing balance to the interface of the
printer. Faultless operation requires an adequate KERN interface cable (optional).
Turn on scale and printer.
Communication parameters (baud rate, bits and parity) of balance and printer must match; see menu item < com Rs232. >. (chap. 13.3.1)

Printout examples KERN YKB-01N

N:

S S

2.998 kg Net weight (stable weighing value)

T:

0.3000 kg Tare weight

G

3.2999 kg Gross weight

N:

S D

2.998 kg Net weight (instable weighing value)

T:

0.3000 kg Tare weight

G

3.2999 kg Gross weight

N: T: G: PCS: UW: REF:

S D

3.2998 kg Net weight (instable weighing value)

0.0000 kg Tare weight

3.2998 kg Gross weight

33 pcs Quantity placed on balance

0.1000 kg Average piece weight

10 pcs Reference quantity

14.3 KCP-interface commands
A detailed description you will find in the ,,KERN Communications Protocol” manual, available in the download area on our KERN homepage.

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14.4 Issue functions
14.4.1 Add-up mode < sum > With this function the individual weighing values are added into the summation memory by pressing a button and edited, when an optional printer is connected. Activate function:
In Setup menu invoke the menu setting < Print sum> and confirm with
button .
Use the navigation keys to select the setting < on > and confirm with button. To exit the menu press the navigation key repeatedly
Condition: Menu setting prmode manual on >
Add-up weighed goods:
If required, place empty container on scale and tare. Place first good to be weighed on balance. Wait until stability display ( )
appears and then press the PRINT button. The display changes to < sum1 >, followed by the current weighing value. The weighing value is stored and edited by the printer. The symbol pops up. Remove the weighed good.
Place second good to be weighed on balance. Wait until stability display ( )
appears and then press the PRINT button. The display changes to < sum2 >, followed by the current weighing value. The weighing value is stored and edited by the printer. Remove the weighed good.
Add-up more weighed goods as described above. You can repeat this process until the capacity of the scales is exhausted.
Display and edit sum ,,Total”:
Press the PRINT key long time. The number of weighings and the total weight are
edited. The sum memory is deleted; the symbol [..] extinguishes.

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Sample log (KERN YKB-01N): Menu setting prmode format short
First weighing
Second weighing
Third weighing
Number of weighings/ Total sum
14.4.2 Data output after pressing the PRINT button < manual > Activate function:
In Setup menu invoke the menu setting and confirm with
button .
For a manual data output select the menu setting < manual > with the navigation
keys and confirm with the button.
Use the navigation keys to select the setting < on > and confirm with button. To exit the menu press the navigation key repeatedly.
Place goods to be weighed on balance:
If required, place empty container on scale and tare. Place goods to be weighed on balance. The weighing value is edited by pressing the
PRINT button.

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14.4.3 Automatic data output < auto >
Data output happens automatically without having to press the PRINT-key as soon as the corresponding output condition has been met, dependent on the setting in the menu.
Enable function and set the output condition:
In Setup menu invoke the menu setting < Print PrMode > and
confirm with button .
For an automatic data output select the menu setting < auto > with the
navigation keys and confirm with the button.
Use the navigation keys to select the setting < on > and confirm with button.

Place goods to be weighed on balance:
If required, place empty container on scale and tare. Place weighed goods and wait until the stability display (
The weighing value is issued automatically.

) appears.

14.4.4 Continuous data output < cont >
Enable function and set the output interval:
In Setup menu invoke the menu setting < Print PrMode > and confirm
with button.
For a continuous data output select the menu setting < cont > with the
navigation keys and confirm with the button.
Use the navigation keys to select the setting < on > and confirm with button.