KERN & Sohn GmbH www.kern-sohn.com
User manual
Platform scales
KERN EFC
TEFC-A type
Version 1.0
2021-06
GB
Ziegelei 1
72336 Balingen-Frommern
Germany
+0049-[0]7433-9933-0
+0049-[0]7433-9933-149
info@kern-sohn.com
TEFC_A-BA-e-2110
KERN EFC
Platform scales
GB
Ver. 1.0 2021-06
User man ual
Contents
1 Technical specification ............................................................................................ 4
2 Declaration of Confor mity ........................................................................................ 8
3 Device overview ...................................................................................................... 9
3.1 Parts ................................................................................................................. 9
3.2 Keyboard ........................................................................................................ 10
3.2.1 Introducing the numerical value ............................................................... 11
3.3 Symbol ........................................................................................................... 11
4 Basic instructions (general information) ................................................................ 12
4.1 Intended use ................................................................................................... 12
4.2 Non-intended use ........................................................................................... 12
4.3 Guarantee ...................................................................................................... 12
4.4 Testing equipment sup erv i si on ....................................................................... 13
5 Basic safety instructions ........................................................................................ 13
5.1 Compliance with the instructions included in the user manual ....................... 13
5.2 Personnel training........................................................................................... 13
6 Transport and storage ........................................................................................... 13
6.1 Checking during recept ion .............................................................................. 13
6.2 Packaging / return transport ........................................................................... 13
7 Unpacking, positioning and start-up ...................................................................... 14
7.1 Installation place, op er ati on pl ace .................................................................. 14
7.2 Unpacking and check ..................................................................................... 14
7.3 Installation, setting and leveling ...................................................................... 15
7.4 Pin use for the connection cable .................................................................... 16
7.5 Power supply .................................................................................................. 17
7.6 Rechargeable battery oper ation ..................................................................... 17
7.6.1 Battery charging ....................................................................................... 18
7.7 Connecting peripher als ................................................................................... 18
7.8 First start ........................................................................................................ 18
7.9 Adjustment ..................................................................................................... 18
2 TEFC_A-BA-e-2110
8 Operation .............................................................................................................. 20
8.1 Switching on/off .............................................................................................. 20
8.2 Zeroing ........................................................................................................... 20
8.3 Ordinary weighing........................................................................................... 20
8.4 Weighing with tare .......................................................................................... 21
8.5 Weight unit switching ...................................................................................... 21
8.6 Counting the number of pieces ....................................................................... 22
8.7 Test weighing ................................................................................................. 23
8.7.1 Test weighing ........................................................................................... 23
8.7.2 Check counting ........................................................................................ 26
8.8 Summing ........................................................................................................ 28
8.9 Animal weighing ............................................................................................. 29
9 Setup menu ........................................................................................................... 30
10 RS-232 interface ................................................................................................ 32
10.1 Technical specification ................................................................................ 32
10.2 Protocol template (KERN YKB-01N) ........................................................... 32
10.3 Printout protocol (continuous data transmission) ........................................ 32
11 Maintenance, servic e and dis posal .................................................................... 33
11.1 Cleaning ...................................................................................................... 33
11.2 Maintenance and service ............................................................................ 33
11.3 Disposal ...................................................................................................... 33
12 Error messages ................................................................................................. 33
13 Help for any minor failures ................................................................................. 34
TEFC_A-BA-e-2110 3
1 Technical specification
KERN EFC 30K-3 EFC 30K-3L
Product number / type TEFC 30K-3-A TEFC 30K-3L-A
Interval (d) 0.002 kg 0.002 kg
Weighing range (Max) 30 kg 30 kg
Reproducibility 0.005 kg/0.01 kg 0.005 kg/0.01 kg
Linearity ±0.004 kg (2 d) ±0.004 kg (2 d)
Minimum piece weight when
counting the number of pieces in laboratory conditions*
Minimum piece weight when
counting the number of pieces in standard conditions**
Recommended
adjustment weight
(not delivered)
1 g (0.5 d) 1 g (0.5 d)
10 g 10 g
30 kg (M1) 30 kg (M1)
Possible adjustment points 10–100% Max 10–100% Max
Settling time (standard) 3 s
Heating time 30 min
Weight units kg, g, lb, oz, PCS
Air humidity max. 80%, relative (non-condensing)
Permissible
ambient temperature
Input voltage
of the device
Input voltage of
the power supply
Battery 3.7 V / 4 Ah
Rechargeable
battery operation
Display housing
dimensions [mm]
Scale plate,
stainless steel [mm]
400 × 300 × 124 mm 500 × 400 × 120 mm
operating time 80 h (illumination off)
operating time 50 h (illumination on)
252 × 162 × 57 (width × depth × height)
0°C to +40°C
5 V, 1 A
100–240 VAC; 50/60 Hz
charging time ca. 5 h
Net weight [kg] 17 kg 19 kg
Interface RS-232
4 TEFC_A-BA-e-2110
Weighing range (Max)
60 kg
60 kg
Settling time (standard)
3 s
Weight units
kg, g, lb, oz, PCS
Air humidity
max. 80%, relative (non-condensing)
Input voltage
Display housing
KERN EFC 60K-3 EFC 60K-3L
Product number / type TEFC 60K-3-A TEFC 60K-3L-A
Interval (d) 0.005 kg 0.005 kg
Reproducibility 0.001 kg/0.002 kg 0.001 kg/0.002 kg
Linearity ±0.01 kg (2 d) ±0.01 kg (2 d)
Minimum piece weight when
counting the number of pieces
in laboratory conditions*
Minimum piece weight when
counting the number of pieces
in standard conditions**
Recommended
adjustment weight
(not delivered)
Possible adjustment points 10–100% Max 10–100% Max
2.5 g (0.5 d) 2.5 g (0.5 d)
25 g 25 g
60 kg (F2) 60 kg (F2)
Heating time 30 min
Permissible
ambient temperature
of the device
Input voltage of
the power supply
Battery 3.7 V / 4 Ah
Rechargeable
battery operation
dimensions [mm]
Scale plate,
stainless steel [mm]
Net weight [kg] 17 kg 19 kg
Interface RS-232
400 × 300 × 124 mm 500 × 400 × 120 mm
operating time 80 h (illumination off)
operating time 50 h (illumination on)
252 × 162 × 57 (width × depth × height)
0°C to +40°C
5 V, 1 A
100–240 VAC; 50/60 Hz
charging time ca. 5 h
TEFC_A-BA-e-2110 5
Weighing range (Max)
150 kg
150 kg
300 kg
Weight units
kg, g, lb, oz, PCS
Heating time
30 min
Air humidity
max. 80%, relative (non-condensing)
Input voltage
Display housing
KERN EFC 100K-3 EFC 100K-3L EFC 300K-2
Product number / type TEFC 100K-3-A TEFC 100K-3L-A TEFC 300K-2-A
Interval (d) 0.01 kg 0.01 kg 0.02 kg
Reproducibility 0.002 kg/0.005 kg 0.002 kg/0.005 kg 0.05 kg/0.1 kg
Linearity ±0.02 kg (2 d) ±0.02 kg (2 d) ±0.04 kg (2 d)
Minimum piece weight when
counting the number of pieces in laboratory conditions*
Minimum piece weight when
counting the number of pieces in standard conditions**
Recommended
adjustment weight
(not delivered)
Possible adjustment points 10–100% Max 10–100% Max 10–100% Max
5 g (0.5 d) 5 g (0.5 d) 10 g (0.5 d)
50 g 50 g 100 g
150 kg (F2) 150 kg (F2) 300 kg (M1)
Settling time (standard) 2 s
Permissible
ambient temperature
of the device
Input voltage of
the power supply
Battery 3.7 V / 4 Ah
Rechargeable
battery operation
dimensions [mm]
Scale plate,
stainless steel [mm]
Net weight [kg] 19 70 70
Interface RS-232
500 × 400 × 120 mm 600 × 500 × 140 mm 600 × 500 × 140 mm
operating time 80 h (illumination off)
operating time 50 h (illumination on)
252 × 162 × 57 (width × depth × height)
0°C to +40°C
5 V, 1 A
100–240 VAC; 50/60 Hz
charging time ca. 5 h
* Minimum piece weight when counting the number of pieces in laboratory conditions:
There are optimum ambient conditions to count pieces with high resolution
No diversification of the counted pieces’ weight
**Minimum piece weight when counting the number of pieces in standard conditions:
There are unsteady ambient conditions (wind gusts, vibrations)
There is diversification of the counted pieces’ weight
6 TEFC_A-BA-e-2110
Dimensions:
Models EFC 30K-3, EFC 60K-3:
Models EFC 30K-3L, EFC 60K-3L, EFC 100K-3:
Models EFC 100K-3L, EF C 300K-2:
TEFC_A-BA-e-2110 7
2 Declaration of Conformity
The valid Declaration of Conformity EC/UE is available at:
www.kern-sohn.com/ce
8 TEFC_A-BA-e-2110
3 Device overview
3.1 Parts
Item Name
1 Display housing
2 Display
3 Keyboard
4 Support
5 Scale plate
6 Leveling screw foot
7 RS-232 interface
8 Connection cable port
9 Guide rail
10 Limiter
11 Power supply socket
TEFC_A-BA-e-2110 9
3.2 Keyboard
Button Name Function in the operating
mode
Weight data transfer via
PRINT
button
the interface
Activating the animal
weighing mode (by pressing and holding the button)
Activating test weighing
Setting the indication con-
ditions and limit values for
test weighing (by pressing
and holding the button)
Activating the piece count-
ing mode
TOL button
MODE
button
Summing
M button
Displaying the “total” val-
ue
Menu function
Displaying the configuration
menu
(by pressing and holding the
button)
Leaving menu / return to the
weighing mode
Selecting the menu items
Setting confirmation
TARE
button
ZERO
button
ON/OFF
button
Taring Setting selection
Zeroing
Switching on/off
10 TEFC_A-BA-e-2110
3.2.1 Introducing the numerical value Button Name Function
Navigation button
Selection of the right-hand digit
Navigation button
Increasing the digit value (0–9)
Navigation button
Confirmation of the enter ed data
3.3 Symbol
The red LED above or beside the symbols will be lit once the following conditions are
met:
Symbol Description
Battery charging indicator
Discharged battery
HOLD “Animal weighing” appl i cati on
PCS “Counting the number of pieces” application
MODE Menu setting indicator
TOTAL “Summing” applicati on
NET Net weight value indicator
Tolerance symbols for check weighing
Stabilization indicator
Zero indicator
TEFC_A-BA-e-2110 11
4 Basic instructions (general information)
4.1 Intended use
The scale you bought is intended for weighing the weighed material. It should be considered a “non-automatic scale”, e.g. the weighed material should be carefully placed
manually on the scale plate center. The weight can be read after it has stabilized.
4.2 Non-intended use
The scale is not intended for dynamic weighing, e.g. for removing or adding small
amounts of the weighed material. The scale’s “stabilizing and compensating” mechanism can result in displaying erroneous weighing results! (Example: slow outflow of the
liquid from the container placed on the scale.)
Do not subject the plate to long-term load. This may damage the weighing mechanism.
Avoid any scale impact and overload higher than the stipulated maximum load (Max),
deducting the tare from the existing load. This could damage the scale.
Never operate the scale in explosive atmospheres. The standard version is not explosion-proof.
Never introduce any structural modifications to the scale. This may result in displaying
erroneous weighing results, violating the technical safety conditions, and also in scale
damage.
The scale should always be operated in line with the provided guidelines. Other operation ranges / areas require a written consent of KERN.
4.3 Guarantee
The warranty expires:
• if you fail to follow our guidelines included in the user manual;
• if you fail to use the device in line with the intended use;
• if you introduce any modifications or open the device;
• if the device gets damaged mechanically or damaged by the utilities, liquids and
ordinary wear and tear;
• if the device is not set correctly or the electrical system is not as required;
• if the weighing mechanism gets overloaded.
12 TEFC_A-BA-e-2110
Before you set and start the device, read this user manual thoroughly
Only the original document in German is binding.
Please keep all the parts of the original packaging in case you had to
Protect all the parts, e.g. wind breaker, scale plate, power supply etc.
4.4 Testing equipment supervision
Within the quality assurance system, you must check the technical measurement
properties of the scale and possibly of the available reference weight regularly. To that
aim, the responsible user should define a relevant cycle, as well as the type and scope
of such an inspection. The information on the supervision of the testing equipment,
which are scales and the required reference weights, can be found on the home page
of KERN (www.kern-sohn.com). The reference weights and scales can be calibrated
fast and for a low cost in the KERN calibration laboratory (against the national reference) approved by DKD (Deutsche Kalibrierdienst).
5 Basic safety instructions
5.1 Compliance with the instructions included in the user manual
even if you are familiar with KERN scales.
All language versions contain non-binding translation.
5.2 Personnel training
The device can be operated and maintained solely by trained workers.
6 Transport and storage
6.1 Checking during reception
Immediately after you have received the shipment, please check if it is free from any
visible outer damage. The same applies for the unpacked device.
6.2 Packaging / return transport
send it back to us.
Always use the original packaging for the return transport.
Before you dispatch the device, disconnect any connected cables as
well as loose/moving parts.
Reinstall any transport locks, if present.
from slipping and damage.
TEFC_A-BA-e-2110 13
7 Unpacking, positioning and s tart-up
7.1 Installation place, operation place
The scales are designed to ensure reliable weighing results in standard operating
conditions.
The choice of a correct scale location ensures its accurate and fast operation.
This is why you should follow the following rules when selecting the installation
place:
• Place the scale on stable, flat surface.
• Avoid extreme temperatures and temperature fluctuations, occurring e.g. when
you place it at the radiator or in a place exposed to direct sun rays.
• Protect the scale from the dir ect dra f t pres ent at open windows and doors.
• Avoid impact when weighing.
• Protect the scale from high hu midi ty of air, vapour s and dus t .
• Do not expose it to long-term heavy moisture. Any forbidden condensation of
the air moisture on the device may occur when a cold device is placed in a
much hotter environment. In such circumstances, leave the device not connected to the mains for 2 hours to adapt to the ambient temperature.
• Avoid static discharge from the weighed material and scale container.
If there are any electromagnetic fields, static discharge and unstable power supply,
high readout deviations (erroneous weighing results) may occur. In such circumstances, change the location.
7.2 Unpacking and check
Remove the device and accessories from the packaging, remove the packaging material and place the device in the target location. Check if all components included in the
delivery are present and not damaged.
Scope of delivery / standard accessories:
• Scale, see chapter 3.1
• Power supply
• User manual
• Dust cover
14 TEFC_A-BA-e-2110
7.3 Installation, setting and leveling
Whenever required, remove the transport protection.
Install the support and display as shown in the figure.
1. The connection cable led through the support
Do not crush or damage the cable.
2. The holder fixed with three bolts
3. Bolt for display fixi ng
4. Knob for display positioning
5. Connection cable connected to the terminal
Place the scale on smooth surface.
TEFC_A-BA-e-2110 15
Level the scale using the leveling feet. The air bubble in the leveler must be pre-
sent in the marked area.
Check leveling at regular intervals.
7.4 Pin use for the connection cable
Pin 1 + signal
Pin 2 - signal
Pin 3 Screen
Pin 4 Exc –
Pin 5 Exc +
The display supports load cells 350 Ω.
Supply voltage: 3.3 VDC +5%
16 TEFC_A-BA-e-2110
to the mains only when the voltage specified on the scale (sticker) and
PLEASE
ing the battery to specific environmental conditions may result in its fire or
Do not connect the electrical contacts of the battery and do not use any
The electrolyte may be released by the damaged battery. Any contact of
r replace batteries, always pay attention to the correct
When the power supply is connected, the battery operation mode is
switched off. Always remove the battery for weighing in the power supply
If you detect any odor emitted by the battery, its heating, discoloration or
7.5 Power supply
Check if the scale voltage is set correctly. The scale can be connected
the local voltage are identical.
Always use the original power supply by KERN. Using any other products requires KERN consent.
Important information:
Before you start the device, check the power cord for damage.
The power cord must not have any contact with liquids.
The plug must be always readily available.
7.6 Rechargeable battery operation
The rechargeable battery and the charger are compatible. Always use the
NOTE!
power supply delivered with the scale.
Do not use the scale when charging.
Always replace the battery with the one of the same type or of the type rec-
ommended by the manufacturer.
The battery is not protected against all the environmental impacts. Expos-
explosion. It may result in serious injuries or material losses.
Protect the battery from fire and heat.
Do not allow the battery to have any contact with liquids, chemicals or salts.
Do not expose the battery to high pressure or microwave radiation.
Do not modify any batteries, charger and do not tamper them.
Do not use any faulty, damaged or deformed battery.
metal items to short circuit them.
the electrolyte with the skin or eyes may irritate them.
When you place o
polarity (see the information in the battery compartment).
mode longer than 48 h! (Overheating danger).
deformation, disconnect it immediately from the power supply and, whenever possible, from the scale.
TEFC_A-BA-e-2110 17
7.6.1 Battery charging The rechargeable battery is charged using the supplied power cord.
Before first use, charge the battery for at least 5 hours using the power cord.
The battery symbol displayed on the screen means that the battery capacity will
soon run down. The device may operate ca. 30 minutes longer and then it will be
switched off automatically. When the scale operates further without charging, a blinking <LO-BAT> symbol will be displayed.
Charge the battery using the provided power supply.
When charging, LED informs of the battery status.
red: The battery is being charged
green: The battery is fully charged
7.7 Connecting peripherals
Before you connect or disconnect any extra devices (printer, computer) to/from the
data interface, the scale should always be disconnected from the mains.
Use solely accessories and peripherals supplied by KERN with the scale, being perfectly compatible with it.
7.8 First start
To get accurate weighing results using electronic scales, ensure the scales achieves
the appropriate operating temperature (see “Heating time”, chapter 1). During the
heating time, the scale must be connected to the power source (the socket, rechargeable battery or batteries).
The scale accuracy depends on the local standard gravity.
Always follow the guidelines in the “Adjustment” chapter.
7.9 Adjustment
As the standard gravity value is not the same in every spot on Earth, every display
with the scale plate connected should be adjusted, in line with the weighing rules resulting from the laws of physics, to the standard gravity in the scale location (provided
the scale system has not already been subject to factory adjustment in its location).
Such an adjustment process should be carried out during the first start, following every
location change and also in the case of any ambient temperature fluctuations. To ensure achieving accurate measurement date, it is also recommended to carry out regular display adjustment also in the weighing mode.
18 TEFC_A-BA-e-2110
Ensure stable environmental conditions. The heating time is required for the
• Prepare the required adjustment weight, see chapter 1.
What to do:
Switch the scale off.
With TOL pressed, switch the scale on using ON/OFF. During the autotest, press
If required, use TARE to change the interval (d),
Confirm by pressing TOL, < > will be displayed.
If required, use TARE to change the number of decimal places,
Confirm by pressing TOL, < > will be displayed.
Press TARE, the maximum load (Max) will be displayed. Red LED above PCS
Confirm by pressing TOL, < > will be displayed.
Ensure there are no objects on the scale plat e .
Once the stability check is completed successfully (red LED above is lit),
Place the adjustment weight and confirm by pressing TARE.
The weight of the last used adjustment weight will be displayed. If required,
Confirm by pressing TOL.
Wait until < > is displayed.
Remove the adjustment weight.
Whenever possible, adjust using the adjustment weight with the weight similar to the maximum load of the scale (the adjustment weight is recommended, see chapter 1). The adjustment may also be carried out using weights
with other nominal values or tolerance classes, but this is not optimal from
the measurement technique perspective. The adjustment weight precision
must correspond to the interval [d] of the scale, though preferably it should be
a bit higher. For information concerning reference weights, see online at:
http://www.kern-sohn.com
•
stabilization (see chapter 1).
• Ensure there are no objects on th e scale pl at e.
TOL and hold it for 10 s until < > is displayed.
you can choose from 1 d, 2 d, 5 d, 10 d, 20 d, 50 d.
you can choose from 0, 0.0, 0.00, 0.000, 0.0000.
will be lit.
If required, change the value using TARE and ZERO (Entering a value in the
numerical form, see chapter 3.2.1).
confirm by pressing TOL, < > is displayed.
change the value using TARE and ZERO (Entering a value in the numerical form,
see chapter 3.2.1).
After the successful adjustment, the scale will switch to the weighing mode again
automatically.
If there is any adjustment error or if an incorrect adjustment weight is used, the
error message is displayed. Repeat the adjustment process.
TEFC_A-BA-e-2110 19
), deducting the tare from the existing load. This could damage
8 Operation
8.1 Switching on/off Switching on:
Press the ON/OFF button.
Once the displays is lit, the scale autotest will be carried out.
Wait until the weight is displayed, the scale is ready for use.
Switching off:
Press the ON/OFF button, the display will go off.
8.2 Zeroing
Zeroing corrects the effect of small pollutants on the scale plate.
Remove the load from the scale.
Press ZERO, the zero indications and <ZERO> symbol will be displayed.
8.3 Ordinary weighing
Check the zero indication, whenever required zero by pressing the ZERO button.
Place the weighed material.
Wait until the stabilization indicator is displayed.
Red LED above will be lit.
Read out the weighing result.
Overload warning
Always avoid any device overload higher than the stipulated maximum
load (Max
the device.
The exceeded maximum load is indicated with --ol--. Reduce the scale
load or reduce the initial load.
20 TEFC_A-BA-e-2110
e, the tare weight is displayed as
To delete the saved tare value, remove the load from the scale plate and
The taring process can be repeated any number of times, e.g. when
ingredients (making up the weight). The limit is
8.4 Weighing with tare
The empty weight of any container used for weighing can be tared, pressing the button
which results in displaying the net weight of the weighed material during consecutive
weighing processes.
Place the scale container on the scale plate.
Wait until the stabilization indicator is displayed and press TARE. The con-
tainer weight is saved in the scale memory. The zero indicator and “NET” symbol
will be displayed.
“NET” indicates all displayed weight values are net values.
Place the weighed material.
Wait until the stabilization indicator is displayed .
Read out the net weight.
• After the load is removed from the scal
a negative value.
•
press TARE button.
•
weighing several mixture
reached when the complete taring scope is used.
8.5 Weight unit switching
The scale is factory-set to <kg>. You can change to <lb> in the menu.
Press MODE and hold it for 3 s until < > is displayed.
Using the TARE button, choose the < > setting.
Confirm by pressing M.
Press MODE to leave the menu, the scale will switch to the weighing mode
again.
TEFC_A-BA-e-2110 21
reference value must be sufficiently
8.6 Counting the number of pieces
Before it is possible to count pieces using the scale, you should determine the average
weight of an individual piece (unit weight), the so-called reference value. To do it,
place the specific number of pieces which the counting the number of pieces will be
carried out for. The scale will determ ine the total weight which will be divided by the
number of pieces, the so-called reference piece number. Next, based on the calculated mean weight of an individual piece, the number of pieces will be counted.
• The higher number of the reference pieces, the higher the accuracy of
counting the number of pieces.
• For small or highly diverse pieces, the
high.
• For the minimum weight of the counted pieces, see the “Technical specification” table.
1. Cal l ing the piece counting mode
Press MODE in the weighing mode, red LED above PCS will be lit. < > will be
displayed.
2. Setting the reference value
Whenever required, place an empty container on the scale and tare it.
To enter the number of reference pieces, press M, < > will be displayed.
Enter the required number of reference pieces using TARE and ZERO, for enter-
ing a value in the numerical form, see chapter 3.2.1.
Place the number of pieces corresponding to the number of reference pieces and
confirm by pressing M.
The mean weight of an individual piece will be determined by the scale and then
the piece quantity will be dis pl ayed.
Remove the reference load. The scale is in the counting mode and counts all
pieces present on the scale plate.
3. Leaving the piece counting mode
Press MODE, the scale will s witch to the weighing mode again.
Red LED above PCS will go off.
22 TEFC_A-BA-e-2110
8.7 Test weighing
The function is available starting from weight values above 20 d.
Activating the test weighing mode:
In the weighing mode, press TOL, < > will be displayed.
Pressing TOL enables to switch between < > and < >.
< > function deactivated
< > function activated
8.7.1 Test weighing
The <Test weighing> application enables to determine the upper and lower limit value
and, consequently, to ensure the weight of the weighed material belongs to the range
between the determined tolerance limits.
Exceeding the limit values (fall below and rise above) is signaled with a visual indication and an audible indic ati on.
Visual signal:
The LED at the right edge of the symbol provides the following information:
The weighed material above the preset limits
Weighed material in the preset limit range
The weighed material below the preset limits
TEFC_A-BA-e-2110 23
1.
If the weighed portion is below the lower limit value, the sound is not
If the weighed portion is above the upper limit value, the sound is not
If the weighed portion is below the lower limit value, the sound is heard
he upper limit value, the sound is heard
If the weighed portion is above the upper limit value, the sound is heard
nd is not
1. If the weighed portion is below the lower limit value, the sound is heard
If the weighed portion is above the lower limit value, the sound is not
Setting conditions of sending and limits:
1. In the weighing mode, press and hold the TOL, < > will be displayed.
2. Using the TARE button, select the required signaling condition.
You can choose:
If the weighed portion is in the present limit range, a sound is heard and a
LED at the [ ] is green.
2.
heard and the LED at the [–] symbol is yellow.
3.
heard and the LED at the [+] symbol is red.
1. If the weighed portion is in the present limit range, a sound is not heard
and the LED at the [ ] is green.
2.
and the LED at the [–] symbol is yellow.
3. If the weighed portion is above t
and the LED at the [+] symbol is red.
1.
and the LED at the [+] symbol is red.
2. If the weighed portion is below the upper limit value, the sou
heard and the LED at the [–] symbol is yellow.
and the LED at the [–] symbol is yellow.
2.
heard and the LED at the [+] symbol is red.
3. Confirm the selection by pressing M , < > will be displayed for a while.
The window for value entry in the numerical form will be displayed where you can
enter the lower limit value < >. Red LED under the active place will be
lit.
4. Enter the lower limit value (for entering the numerical value see chapter 3.2.1)
and confirm.
5. < > will be displayed for a while. The window for value entry in the numeri-
cal form will be displayed where you can enter the upper limit value. Red LED
under the active place will be lit.
6. Enter the upper limit value (for entering the numerical value see chapter 3.2.1)
and confirm.
7. < > will be displayed for a while, the scale will switch to the weighing mode
again.
24 TEFC_A-BA-e-2110
Tolerance check start :
Ensure the test weighing mode is active. To do it, press TOL several times until <
> is displayed.
Place the weighed material (< 20 d) and, based on the tolerance symbols / audible
signal, check if the weighed material belongs to the preset tolerance range.
Weighed material below the preset tolerance
Weighed material in the preset tolerance range
Weighed material above the preset tolerance
• To cancel the limit values, enter <00000.0 kg>.
• Deactivate the test weighing mode. To do it, press TOL the number of times
required to display < >.
TEFC_A-BA-e-2110 25
8.7.2 Check counting
The <Test counting> application enables to determine the upper and lower limit value
and, consequently, to ensure that the target number of pieces belongs to the range
between the determined tolerance limits.
When the target value is reached, the sound is heard and an optical signal is visible.
Setting conditions of sending and limits:
Press MODE in the weighing mode, red LED above PCS will be lit. < > will be
displayed.
Press TOL and hold it for 3 s until < > is displayed.
Using the ZERO button, select the required signaling condition. For selection op-
tions see chapter 8.7.1 / step 2.
Confirm the selection by pressing M , < > will be displayed for a while.
The window for value entry in the numerical form will be displayed where you can
enter the lower limit value < >. Red LED under the active place will be
lit.
Enter the lower limit value of the target number of pieces (for introducing the nu-
merical value see chapter 3.2.1) and confirm.
< > will be displayed for a while. The window for value entry in the numeri-
cal form will be displayed where you can enter the upper limit value. < >.
Red LED under the active place will be lit.
Enter the upper limit value of the target number of pieces (for introducing the nu-
merical value see chapter 3.2.1) and confirm.
< > will be displayed for a while, the scale will switch to the piece counting
mode again.
26 TEFC_A-BA-e-2110
• To cancel the limit values, enter <00000>.
Tolerance check start :
Ensure the average weight of a single piece is determined (see chapter 8.6.
Place the weighed material (< 20 d) and, based on the tolerance symbols / audible
signal, check if the weighed material belongs to the preset tolerance range.
Weighed material below the preset tolerance
Weighed material in the preset tolerance range
Weighed material above the preset tolerance
• Deactivate the test weighing mode. To do it, press TOL the number of times
required until < > is displayed.
TEFC_A-BA-e-2110 27
8.8 Summing
The function enables to add individual weighing values to the total memory by pressing the button.
The function is available starting from weight values above 20 d.
Summing the weighed material:
Whenever required, place an empty container on the scale and tare it.
Place the first weighed material. Wait until the stabilization indicator is displayed
and then press M. The weight value will be saved. Red LED above TOTAL will be
lit.
Remove the weighed material. The subsequent weighed material can be added
only when the indication ≤ zero.
Place the second weighed material. Wait until the stabilization indicator is dis-
played and then press M. The weight value will be added to the total memory. The
total will be displayed alternately with the currently placed weight for ca. 2 s.
Whenever required, add the subsequent weighed material as described above.
Load should be removed from the scale between consecutive weighing procedures.
This process may be repeated 99 times until you reach the scale weighing range.
Displaying the “total” value:
When zero is displayed, press M. The total weight will be displayed for ca. 2 s.
Deleting the total memory:
When zero is displayed, press the M button. When the total weight is displayed,
press MODE.
28 TEFC_A-BA-e-2110
8.9 Animal weighing
The <Animal weighing> application enables to weigh restless loads or weigh in unstable ambient conditions.
The scale determines and displays one stable mean value based on several weighing
values.
Calling the animal weighing mode
In the weighing mode, press and hold the PRINT button for 2 s, the red LED at
HOLD will be lit. < > will be displayed for a while.
Starting the measurement cycle
Place the weighed material.
If the indication is stable for a couple of seconds, the weight value on the display
will be frozen for a while.
In the course of the mean value determ ination, the weighed material can be added or removed as the weighing value is updated continuously.
Leaving the animal weighing mode
In the weighing mode, press and hold the PRINT button for 2 s, the red LED at
HOLD will go off. < > will be displayed for a while.
TEFC_A-BA-e-2110 29
9 Setup menu
The setup menu enables to adapt the scale settings / scale behavior to your requirements (e.g. ambient conditions, special weighing processes).
Menu navigation:
Displaying the menu In the weighing mode, press and hold the MODE for 3
s, the first menu item < > will be displayed.
Red LED above MODE will be lit.
Selecting the menu item Individual menu items can be selected consecutively,
pressing M.
Setting selection Confirm the selection of the menu item by pressing
the TARE button. The current setting will be displayed.
Changing settings The TARE button enables to switch between the
available settings.
Setting
Press M, the consecutive menu item will be displayed.
confirmation
Leaving the menu Press MODE, the scale will switch to the weighing
mode again.
Overview:
Menu item
U
Units
BuAd96
Transmission
speed
RS CO
Data transmission
Available
settings
Explanation
U kg Weight unit “kilogram”
U lb Weight unit “pound”
BuAd96* Transmission speed 9600
BuAd48 Transmission speed 4800
rS oFF Data transmission off
rS Co Continuous data transmission of st able/unstable
weighing values
rS SCo* Continuous data transmission of stable weighing
values
rS St Data transmission for an unstable weighing value
rS Pr Data transmission after PRINT is pressed
30 TEFC_A-BA-e-2110
FiLt-1
Zero-1
L-AZ-0
L-AZ 0* ∼
The load scope where the scale returns to zero, you can
ledb
ledb-h
bright
ledb-m
medium
ledb-l
low
SDBY
Auto Sleep
function
Filter
Maintaining zero
SDBY Y Function enabled
The scale is switched to “Sleep” mode automatically
after 50 seconds of no operation or load change. The
indication will disappear, solely the dot will be lit.
Once the load is changed or the scale is operated,
the scale is switched on again automatically.
SDBY N Function disabled
FiLt-1* ∼
FiLt-5
Adaptation to the ambient conditions, you can se-
lect from FiLt-1 ∼ FiLt-5.
The higher the filter degree, the faster the response
time/the higher the sensitivity.
ZEro0* ∼
ZEro9
Automatic zero maintenance, possible to choose
from 0 d to 9 d
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 fr om the c ontainer plac ed on the sc ale,
evaporating processes).
When dosing with s mall weight fluctuations, it is rec ommended
to switch this functi on off.
Setting
a decimal point
L-AZ 9
LED
brightness
choose from 0 d – 9 d
TEFC_A-BA-e-2110 31
+ 15.000 kg
10 RS-232 interface
RS-232 ensures two-way data exchange between the scale and external devices. Data is sent asynchronously in ASCII code.
To ensure communication between the balance and the printer, the following conditions must be met:
• Connect the scale with the printer interface using the appropriate cable. Trouble-free operation is ensured only when the appropriate interface cable by
KERN is used.
• Communication parameters (e.g. transmission speed) of the scale and the
printer must be compliant.
10.1 Technical specification
Port 9-Pin--pin mini D-Sub plug
Pin 2 RXD Input
Pin 3 TXD Output
Pin 5 GND Signal groun d
Transmission
The choice of 4800/9600
speed
10.2 Protocol template (KERN YKB-01N)
10.3 Printout protocol (continuous data transmissi on)
Byte 1 2 3 4 5 6 7 8 9 10 11 12 13
+ <20> <20> 1 5 0 . 0 k g <CR> <LF>
– <20> <20> <20> 5 0 . 0 k g <CR> <LF>
O L
Nr Description
1 The sign (plus/minus); alphabet: O
2 ∼ 8
9 ∼ 10
11 ∼ 12
<20> Space
32 TEFC_A-BA-e-2110
7 bits of weighing value including the decimal point
Weight unit
End symbol
Before you start any works related to the maintenance, cleaning and
Error message
Explanation
--ol--
Overloading
Err 4
Zeroing range exceeded (upward)
11 Maintenance, service and dispos al
repair, disconnect the device from the operating voltage.
11.1 Cleaning
Do not use any aggressive cleaning agents (solvents etc.), but clean the device with a
cloth and mild soap solution. The liquid must not get inside the device. Wipe with a
dry, soft cloth.
Any loose specimen/powder remains can be removed carefully with a brush or a
handheld vacuum cleaner.
Remove any scattered weighed material immediately.
11.2 Maintenance and service
The device can be operated and maintained solely by the technicians trained and
authorized by KERN.
Disconnect from the mains befor e op eni ng .
11.3 Disposal
The packaging and the device should be disposed in accordance with the national or
regional law in the location where the device is operated.
12 Error messages
TEFC_A-BA-e-2110 33
The weight indicator is not
• The scale is not on.
• Interrupted mains connection (mains cable not
connected/damaged).
• Mains voltage failure.
The weight indication
• Table/air vibrations.
• The scale plate is in contact with foreign bodies.
ing device).
The weighing result
• The scale indication was not reset.
ing device).
13 Help for any minor f ail ures
If there are any program execution problems, the scale should be switched off and
disconnected from the mains for a while. Next, the weighing process should be started
anew.
Problem Possible cause
lit.
keeps fluctuating.
is clearly wrong.
• Draft / air movements.
• Electromagnetic fields / static discharge (select
another location / if possible, switch off the interfer-
• Incorrect adjustment.
• Scale not placed on a level surface.
• There are heavy temperature fluctuations.
• The heating time not observ ed.
• Electromagnetic fields / static discharge (select
another location / if possible, switch off the interfer-
34 TEFC_A-BA-e-2110
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