KERN & Sohn GmbH
Ziegelei 1
D-72336 Balingen
E-Mail: info@kern-sohn.com
Phone: +49-[0]7433- 9933-0
Fax: +49-[0]7433-9933-149
Internet: www.kern-sohn.com
Operating manual
Price calculating balance
KERN RFC
Type: RPB-DM
Version 1.0
2017-09
GB
RFC-BA-e-1710
Importør:
Impex Produkter AS
Gamle Drammensvei 107
1363 Høvik
www.impex.no
info@impex.no
Tel.: 22 32 77 20
2 RFC-BA-e-1710
GB
KERN RFC
Version 1.0 2017-09
Operating manual
Price calculating balance
Contents
1 Technical data ................................................................................................ 4
1.1 Dimensions (mm) ....................................................................................................................... 6
2 Declaration of conformity ............................................................................. 6
3 Appliance overview ....................................................................................... 7
3.1 Overview of display .................................................................................................................... 8
3.2 Keyboard overview ................................................................................................................... 10
4 Basic Information (General ) ........................................................................ 11
4.1 Proper use ................................................................................................................................ 11
4.2 Improper Use ............................................................................................................................ 11
4.3 Warranty ................................................................................................................................... 11
4.4 Monitoring of Test Resources .................................................................................................. 11
5 Basic Safety Precauti on s ............................................................................ 12
5.1 Pay attention to the instructions in the Operation Manual........................................................ 12
5.2 Personnel training ..................................................................................................................... 12
6 Transport and storage ................................................................................. 12
6.1 Testing upon acceptance ......................................................................................................... 12
6.2 Packaging / return transport ..................................................................................................... 12
7 Unpacking, Setup and Commissioning ..................................................... 13
7.1 Installation Site, Location of Use .............................................................................................. 13
7.2 Unpacking ................................................................................................................................. 13
7.2.1 Placing ...................................................................................................................................... 14
7.2.2 Scope of delivery / serial accessories: ..................................................................................... 14
7.3 Mains connection ...................................................................................................................... 14
7.4 Storage battery operation (optional) ......................................................................................... 14
7.5 Initial Commissioning ................................................................................................................ 15
7.6 Adjustment ................................................................................................................................ 15
7.7 Verification ................................................................................................................................ 18
7.7.1 Adjustment switch and seals .................................................................................................... 19
7.8 Checking the balance verification settings ............................................................................... 19
8 The menu ...................................................................................................... 20
8.1 Access to menu ........................................................................................................................ 20
8.2 Navigation in the menu: ............................................................................................................ 20
8.3 Menu overview ......................................................................................................................... 21
9 Operation ...................................................................................................... 23
9.1 Turn on/off ................................................................................................................................ 23
9.2 Zeroing ..................................................................................................................................... 23
9.3 Weighing with tare .................................................................................................................... 23
9.4 Overload warning ..................................................................................................................... 23
10 Weighing with price determination ............................................................ 24
10.1 Basic price entry via keyboard ................................................................................................. 24
10.2 Memory for basic price (PLU = Price look up) .......................................................................... 25
10.3 Calculating the change ............................................................................................................. 26
RFC-BA-e-1710 3
11 Additional useful functions ......................................................................... 27
11.1 Enter basic price and calculate the total price (without weighing) ........................................... 27
11.2 AUTO CLEAR ........................................................................................................................... 27
11.3 Display background illum ination ............................................................................................... 28
11.4 Units switch-over from € / kg € / 100g .................................................................................. 28
12 RS 232 interface ........................................................................................... 29
12.1 Technical data .......................................................................................................................... 29
12.2 Pin allocation of balance output bushing: ................................................................................. 29
12.3 Remote control commands ...................................................................................................... 29
12.4 Explanation of the data transfer ............................................................................................... 30
13 Servicing, maintenance, disposal .............................................................. 30
13.1 Cleaning ................................................................................................................................... 30
13.2 Servicing, maintenance ............................................................................................................ 30
13.3 Disposal .................................................................................................................................... 30
14 Instant help ................................................................................................... 31
14.1 Error messages ........................................................................................................................ 32
4 RFC-BA-e-1710
1 Technical data
Models without vertical display:
KERN (Typ) RFC 6K3M RFC 15K3M RFC 30K3M
Trademark RPB 6K1DM RPB 15K2DM RPB 30K5DM
Weighing range (max) 3 kg / 6 kg 6 kg / 15 kg 15 kg / 30 kg
Readability (d) 1 g / 2 g 2 g / 5 g 5 g / 10 g
Minimum load (Min) 20 g 40 g 100 g
Verification value (e) 1 g / 2g 2 g / 5g 5 g / 10 g
Verification class III III III
Reproducibility 1 g / 2 g 2 g / 5 g 5 g / 10 g
Linearity ± 3 g / ± 6 g ± 2 g /± 5 g ± 5 g /± 10 g
Recommended adjusting
weight (not supplied)
6 kg (M1) 15 kg (M1) 30 kg (M1)
Stabilisation time 2 s
Heating time (operating
temperature)
10 min
Net weight (kg) 4.1 kg
Basic price, can be switched
over
€/kg; €/100 g
Admissible
ambient temperature
-10° C to 40° C
Allowable air humidity 0 % - 80 % (non-condensing)
Electric Supply
Mains adapter 220 V - 240 V AC, 50 Hz
balance 12 V, 500 mA
Rechargeable battery
(optional)
6 V, 3.2 Ah
Operating time – background lighting OFF 60 hrs.
RFC-BA-e-1710 5
Models with post-mounted display:
KERN (Typ) RFC 6K3HM RFC 15K3HM RFC 30K3HM
Trademark RPB 6K1DHM RPB 15K2DHM RPB 30K5DHM
Weighing range (max) 3 kg / 6 kg 6 kg / 15 kg 15 kg / 30 kg
Readability (d) 1 g / 2 g 2 g / 5 g 5 g / 10 g
Minimum load (Min) 20 g 40 g 100 g
Verification value (e) 1 g / 2 g 2 g / 5 g 5 g / 10 g
Verification class III III III
Reproducibility 1 g / 2 g 2 g / 5 g 5 g / 10 g
Linearity ± 3 g / ± 6 g ± 6 g /± 15 g ± 15 g / ± 30 g
Recommended adjusting
weight (not supplied)
6 kg (M1) 15 kg (M1) 30 kg (M1)
Stabilisation time 2 s
Heating time (operating
temperature)
10 min
Net weight (kg) 4.1 kg
Basic price, can be switched
over
€/kg; €/100 g
Admissible
ambient temperature
-10° C to 40° C
Allowable air humidity 0 % - 80 % (non-condensing)
Electric Supply
Mains adapter 220 V - 240 V AC, 50 Hz
balance 12 V, 500 mA
Rechargeable battery
(optional)
6 V, 3.2 Ah
Operating time – background lighting OFF 60 hrs.
6 RFC-BA-e-1710
1.1 Dimensions (mm)
2 Declaration of conformity
The current EC/EU Conformity declaration can be found online in:
www.kern-sohn.com/ce
RFC-BA-e-1710 7
3 Appliance overview
Models without vertical display:
Models with post-mounted display:
1. Weighing pan
2. Bubble level
3. Post-mounted display
4. Footscrews
5. Mains adapter connection
6. ON/OFF switch
7. RS 232 interface
8. Battery compartment
9. Adjustment switch
8 RFC-BA-e-1710
3.1 Overview of display
Operator and secondary display (standard on the backside of models without
post-mounted display):
Additional post-mounted display for models with tripod:
1. Weight
2. Basic price
3. Sales price
RFC-BA-e-1710 9
Display weight
Here, the weight of your goods is displayed.
Indicator next to symbol displays:
Rechargeable battery very low
NET Net weight
�
Stability display
a
Zeroing display
Display basic price
Basic price, can be switched over from € / kg or € / 100 g.
Indicator next to symbol displays:
€ / kg Basic price in €/kg
€ / 100 g Basic price in €/100 g
AUTO CLEAR
Set basic price is deleted automatically when
balance is unloaded
Display sale price
Here the sales price is displayed in Euro [€].
Indicator next to symbol displays:
BAR Calculating the change (see chap. 10.3)
Battery loading status display
red Charging storage battery
green Rechargeable battery completely reloaded
10 RFC-BA-e-1710
3.2 Keyboard overview
Selection
Function
~
• Numerical keys, PLU-keys
• In menu: Invoke parameter
• Delete
• Save basic price (press key for a long time),
see chap. 10.2
• Call-up basic price (press and hold key for a short time),
see chap. 10.2
• Switch-over unit € / kg € / 100g
• Issue to external device
•
In menu: Parameter selection
• Calculating the change, see chap. 10.3
• Taring, see chap. 9.3
• In menu: Storing settings
• For activated function, the set basic price is automatically
deleted when the balance is unloaded.
• Enter basic price per piece (without weighing)
• Zeroing
• In menu: Back to weighing mode
• Decimal po int
RFC-BA-e-1710 11
4 Basic Information (General)
4.1 Proper use
The balance you purchased is intended to determine the weighing value of material
to be weighed. It is intended to be used as a “non-automatic balance”, i.e. the
material to be weighed is manually and carefully placed in the centre of the weighing
pan. As soon as a stable weighing value is reached the weighing value can be read.
4.2 Improper Use
Do not use balance for dynamic weighing. In the event that small quantities are
removed or added to the material to be weighed, incorrect weighing results can be
displayed due to the “stability compensation“! (Example: Slowly draining fluids from a
container on the balance.)
Do not leave permanent load on the weighing pan. This may damage the measuring
system.
Impacts and overloading exceeding the stated maximum load (max) of the balance,
minus a possibly existing tare load, must be strictly avoided. Balance may be
damage by this.
Never operate balance in explosive environment. The serial version is not explosion
protected.
The structure of the balance may not be modified. This may lead to incorrect
weighing results, safety-related faul ts and destruction of the balanc e.
The balance may only be used according to the described conditions. Other areas of
use must be released by KERN in writing.
4.3 Warranty
Warranty claims shall be voided in case
• Our conditions in the operation manual are ignored
• The appliance is used outside the described uses
• The appliance is modified or opened
• Mechanical damage or damage by media, liquids, natural wear and tear
• The appliance is improperly set up or incorrectly electrically connected
• The measuring system is overloaded
4.4 Monitoring of Test Resources
In the framework of quality assurance the measuring-related properties of the
balance and, if applicable, the testing weight, must be checked regularly. The
responsible user must define a suitable interval as well as type and scope of this test.
Information is available on KERN’s home page (www.kern-sohn.com with regard to
the monitoring of balance test substances and the test weights required for this. In
KERN's accredited DKD calibration laboratory test weights and balances may be
calibrated (return to the national standard) fast and at moderate cost.
12 RFC-BA-e-1710
5 Basic Safety Precautions
5.1 Pay attention to the instructions in the Operati on Ma nual
Carefully read this operation manual before setup and commissioning,
even if you are already familiar with KERN balances.
5.2 Personnel training
The appliance may only be operated and maintained by trained personnel.
6 T ransport and storage
6.1 Testing upon acceptance
When receiving the appliance, please check packaging immediately, and the
appliance itself when unpacking for possible visible damage.
6.2 Packaging / return transport
Keep all parts of the original packaging for a possibly required return.
Only use original packaging for returning.
Prior to dispatch disconnect all cables and remove loose/mobile
parts.
Reattach possibly supplied transport securing devices.
Secure all parts such as the glass wind screen, the weighing
platform, power unit etc. against shifting and damage.
RFC-BA-e-1710 13
7 Unpacking, Setup and Commis si oning
7.1 Installation Site, Location of Use
The balances are designed in a way that reliable weighing results are achieved in
common conditions of use.
You will work accurately and fast, if you select the right location for your balance.
On the installation site observe the following:
• Place the balance on a firm, level surface;
• Avoid extreme heat as well as temperature fluctuation caused by installing
next to a radiator or in the direct sunlight;
• Protect the balance against direct draughts due to open windows and doors;
• Avoid jarring during weighing;
• Protect the balance against high humidity, vapours and dust;
• Do not expose the device to extreme dampness for longer periods of time.
Non-permitted condensation (co nd ens a ti on o f air humidi ty on the appliance)
may occur if a cold appliance is taken to a considerably warmer environment.
In this case, acclimatize the disconnected appliance for ca. 2 hours at roo m
temperature.
• Avoid static charge of goods to be weighed or weighing container.
If electro-magnetic fields or static charge occur, or if the power supply is unstable
major deviations on the display (incorrect weighing results) are possible. In that case,
the location must be changed.
7.2 Unpacking
Carefully remove the balance from the packaging, remove plastic cover and setup
balance at the intended workstation.
14 RFC-BA-e-1710
7.2.1 Placing
Level balance with foot screws until the air bubble of the
water balance is in the prescribed circle.
7.2.2 Scope of delivery / serial accessories:
• Balance, see chap. 3
• Mains adapter
• Protective cover
• Operating manual
7.3 Mains connection
Power is supplied via the external mains adapter. The stated voltage value must be
the same as the local voltage.
Only use KERN original mains adapter. Using other makes requires consent by
KERN.
7.4 Storage battery operation (optional)
The optionally supplied battery is charged with the supplied power supply.
Before the first use, the battery should be charged by connecting it to the mains
power supply for at least 15 hours.
• If an arrow [] appears on the weight display above the battery symbol , the
capacity of the rechargeable battery will soon be exhausted. The balance will be
ready to operate for about another 10 hour s, then it will switch off automati c all y.
Charge the battery with the help of the supplied power pack.
• If in the weight display appears „bat Lo“ followed by a flickering display, the
capacity of the rechargeable battery is below the prescribed minimum. The
balance will be ready to operate for about another 5 minutes, then it will switch off
automatically. Charge the battery with the help of the supplied power pack.
The LED display informs you during loading about the loading status of the
rechargeable battery.
red: Battery is almost discharged
green: Rechargeable battery completely reloaded
RFC-BA-e-1710 15
7.5 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. 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.
7.6 Adjustment
As the acceleration value due to gravity is not the same at every location on earth,
each balance must be coordi na ted - in compliance with the underlying physical
weighing principle - to the existing acceleration due to gravity at its place of location
(only if the balance has not already been adjusted to the location in the factory). This
adjustment process m us t be carr i ed out for the fir st com mis si oni ng , 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 balance
periodically in weighing operation.
The adjustment is locked for verified balances. Carrying out adjustment
requires that the seal is destroyed and the adjustment switch is confirmed in
step 3 when turning on the scale. For position of adjustment switch, see
chap. 6.8.1
Attention:
After destruction of the seal the balance must be re-verified by an
authorised agency and a new verification wire/seal mark fitted before it can
be reused for applications subject to verification.
16 RFC-BA-e-1710
Procedure when adjusting:
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.
Arrange adjustment weight, details see chap.1 „Techn. data“
To turn on/off operate the on/off switch at the
underneath side on the right of the scale and
keep pressed for a little while. During the selftest
press and keep pressed until Pn is
displayed.
Use the numeric keys to enter the standard
password 0000. Pn---- is displayed.
Confirm password wi th , the adjustment
function F0 CAL will be displayed.
Press adjustment switch on the lower side of the balance.
Press , UnLoAd will be displayed. Ensure
that there are no objects on the wei g hi ng pan.
Press again, CAP LOADxx will be
displayed.
(example)
RFC-BA-e-1710 17
Set the displayed adjustment weight with the help
of . Place the adjustment weig ht. Wait for
the stability display appears,
then press . PASS will be displayed.
Remove the adjustment weight. F0 CAL appear s
on the display. Now the process of adjustment is
successfully completed. Return to weighing mode
using
In case of an adjustment error or incorrect adjustment weight, the display will
show an error message (
FAKLH
), then repeat adjustment pr oces s.
18 RFC-BA-e-1710
7.7 Verification
UUGeneral hints:
According to EU directive 2014/31/EU balances must be officially verified if they are
used as follows (legally controlled area):
a) For commercial transactions if the price of goods is determined by weighing.
b) For the production of medicines in pharmacies as well as for analyses in the
medical and pharmaceutical laboratory.
c) For official purpose.
d) For manufacturing final packages.
In cases of doubt, please contact your local trade in standard.
After verification the balance is sealed at the indicated positions.
Verification of the balance is invalid without the "seals".
Verification notes
An EU type approval exists for balances described in their technical data as
verifiable. If a balance is used where obligation to verify exists as described above, it
must be verified and re-verified at regular intervals.
Re-verification of a balance is carried out according to the respective national
regulations. The validity for verification of balances in Germany is e.g. 2 years.
The legal regulation of the country where the balance is used must be observed!
Balances with obligation to verify must be taken out of operation if:
•
The we ighing result of the balance is outside the error limit. Therefore, in
regular intervals load balance with known test weight (ca. 1/3 of the max. load)
and compare with displayed value.
•
The reverification deadline has been exceeded.
RFC-BA-e-1710 19
7.7.1 Adjustment switch and seals
1. Seal of approval
2. Adjustment switch
7.8 Checking the balance verification settings
For the adjustment, the balance must be switched over to service mode.
In the service mode the parameters of the balance can be modified.
If this happened accidentall y, please contact KERN.
In verified scales the service mode is locked individually for each switch. To disable
the access lock, destroy the seal and actuate the switch.
Attention:
After destruction of the seal the balance must be re-v er i fie d by an author is ed ag enc y
and a new verification wire/seal mark fitted before it can be reused for applications
subject to verification.
20 RFC-BA-e-1710
8 The menu
8.1 Access to menu
To turn on/off operate the on/off switch at the
underneath side on the right of the scale and keep
pressed for a little while. During the selftest press
and keep pressed until the password inquiry
"P in" appears.
Using numeric keyboard, enter the standard
password "0000". "P in ----" is displayed.
Confirm with password, the adjustment
function F0 CAL will be displayed.
Press adjustment switch on the lower side of the balance
8.2 Navigation in the menu:
Use the numeric keys or to scroll up or down in the menu.
Confirm selected function by pressing . Select desired setting with or
and acknowledge by .
Exit menu:
Press the button as often as necessary until the zero display appears. The
balance is now again in weighing mode.
RFC-BA-e-1710 21
8.3 Menu overview
Function
Settings
or and
Description
or and
F0
CAL
Adjustment function
F1
rES
Resolution
Press adjustment switch
rES dUAL-i
rES dUAL-r
3000
6000
F2
CAP
Weighing range (max)
30KG
3KG
6KG
15KG
F3
PdECi
Decimal point price
PdSL 0.00
PdSL 0.000
PdSL 0.0000
PdSL 0
F4
PdESC
not documented
PdESC Fix
PdESC FLoAt
F5
SPEEd
A/D converter
SLow
MEdiuM
FASt
F6
Min Coin
Interval size currency
Coin 1 Coin
Coin 2 Coin
Coin 5 Coin
Coin 10 Coin
F7
SCSiUE tArE
Multi-Tare function
S tArE oFF
S tArE on
22 RFC-BA-e-1710
F8
iSn
Internal value
iSnxxxxx
F9
GrA
Gravity
GrA x.xxxxx
F10
rESEt
Back to factory setting
F11
rS232
Interface RS232
ModE
oFF Cont
Continuous data transfer
StC
Stable value continuous
toLEdo
Log Type 1
nCiECr
Log Type 2
nCiGEn
Log Type 3
tEC
Log Type 4
EASY
Log Type 5
PrintEr
Printout via printer
tPuP
Printout by pressing
LP50
Printout by pressing
PoS
not documented
bAUd
Baud rate
9600
19200
38400
115200
1200
2400
4800
Pr
8n1
8 data bits, no parity, 1 stop bit
7E1
7 data bits, even parity, 1 stop bit
7o1
7 data bits, odd parity, 1 stop bit
RFC-BA-e-1710 23
9 Operation
9.1 Turn on/off
To turn on/off operate the on/off switch at the
underneath side on the right of the scale and keep
pressed for a little while. The balance will carry out
a self-test As soon as the weight display shows "0"
in all the three display windows your balance is
ready to weigh.
To switch-off push shortly to the right the switchon/switch-out on the right lower side of the balance.
9.2 Zeroing
Resetting to zero corrects the influence of light soiling on the weighing plate.
Unload the balance
Press , the balance starts resetting to zero.
The indicator [] above appears.
9.3 Weighing with tare
Deposit weighing vessel. When stability display appears, press . Zero
display and the indicator [] above [NET] appear.
Weigh the material, the net weight will be indicated.
The weight of the weighing container will be displayed as a minus number after
removing the weighing container.
To delete the tare value unload the weighing plate and press , the indicator
[] above [GROSS] appears.
9.4 Overload warning
Overloading exceeding the stated maximum load (max) of the balance, minus a
possibly existing tare load, must be strictly avoided. This could cause damage to
the balance.
Exceeding maximum load is indicated by the display of “„-OL-“, and an audio
sound. Unload balance or reduce preload.
24 RFC-BA-e-1710
10 Weighing with price determination
As soon as the goods to be weighed are placed on the balance and t he basi c pri ce
has been set the price is calculated automatically and displayed in the provided field.
10.1 Basic price entry via keyboard
Place the weighing good, wait for stability display.
(example)
Enter basic price via the numeric keys to
The sales price will be calculated and displayed
automatically.
(example)
• The set basic price is deleted by .
• Using switch over basic price from € / kg to € / 100g.
(see chapter 11.1)
•
Calculating the change, see chap. 10.3
RFC-BA-e-1710 25
10.2 Memory for basic price (PLU = Price look up)
The scale has 10 memory locations, which can be stored using the numeric keys
to .
Save:
Make sure that no weighing good is on the weighing
plate and the scale stands on 0.
Enter basic price via the numeric keys to
(example)
Press and keep pressed, until
SAVE PoS PS 0-9 is displayed.
Here, the memory location can be entered.
Using the numeric keys to select
memory location, here is this example memory
location 1.
PLU 1 SAVED will be displayed briefly.
Now the basic price is allocated to the memory
location 1.
Retrieve / show sales price:
Press . LOAD POS 0-9 is displayed.
Invoke the stored memory location
(press to shortly). The basic price stored
in the memory location is displayed.
The balance is now ready for weighing.
26 RFC-BA-e-1710
Put items to be weighed, the sales price calculated
from the saved basic price is displayed.
Before calling-up another PLU, the displayed basic price has to be deleted by
.
10.3 Calculating the change
When the sales price appears, press . The
display changes to the prompt for entering the given
amount.
Enter the given amount by the numeric keys. Here in
the example 20.00.
The change is calculated automatically and
displayed.
Using the balance returns into the weighing
mode.
RFC-BA-e-1710 27
11 Additional useful functions
11.1 Enter basic price and calculate the total price (without weighing)
Enter basic price:
Use the numeric keys to enter the basic price, in the
example press 12.00. .
(example)
Calculate the total price:
Use the numeric keys to enter the number of
pieces, the total price (e.g. 24.00) is calculated and
displayed.
(example)
Return to weighing mode using
11.2 AUTO CLEAR
Enable:
Unload the weighing plate and press , now the function is enabled. At the same
time the arrow above "AUTO CLEAR" appears in the display.
The set basic price is continues to be displayed after unloading the balance.
Disable:
Press anew, the AUTO-CLEAR function will be deactivated, the arrow
above „AUTO CLEAR“ will extinguish.
When the item to be weighed is removed from the weighing plate, the set basic
price will be automatically deleted.
28 RFC-BA-e-1710
11.3 Display background illumination
In weighing mode press and keep pressed,
until the background illumination type which has
been set as last (p.ex. bLSET modE Auto) is
displayed.
Use to change between the settings Auto, On and Off.
To save the desired setting, press . The desired background illumination type is
now set. The balance changes then automatically into weighing mode.
on
Background illumination on
off
Background illumination off
Auto Automatic background i l lumi nati o n only when weighing pate is
loaded or key pressed.
11.4 Units switch-over from € / kg € / 100g
Press to change between the units kg and 100 g. The triangle in the basicprice display shows now the currently set unit.
RFC-BA-e-1710 29
12 RS 232 interface
12.1 Technical data
RS 232 connection to output of weighing data
ASCII code
Baud rate 1200 - 115200
8 data bits
No parity
12.2 Pin allocation of balance output bushing:
Pin 2
RXD
Input
Receiving data
Pin 3 TXD Output Transmission data
Pin 5
GND ― Signal ground
9pin D Connector:
Balance
computer
Pin 2 ― Pin 3
Pin 3
―
Pin 2
Pin 5
―
Pin 5
12.3 Remote control commands
Remote control
Computer
T Taring
Z
Zeroing
S
Output of stable weighing values
W
Output of stable or unstable weighing results
１
２
３ ４ ５
６ ７ ８
９
30 RFC-BA-e-1710
12.4 Explanation of the data transfer
S T , G S : /U
k g CR
LF
Header 1
Header 2 -WEIGHT DATA-
WEIGHT
UNIT
TERMINATOR
HEADER 1: ST=STABLE, US=UNSTABLE
HEADER 2: NT=NET, GS=GROSS
13 Servicing, maintenance, disposal
13.1 Cleaning
Before cleaning, please disconnect the appliance from the operating voltage.
Please do not use aggressive cleaning agents (solvents or similar agents), but a
cloth dampened with mild soap suds. Ensure that no liquid penetrates into the device
and wipe with a dry soft cloth.
Loose residue sample/powder can be removed carefully with a brush or manual
vacuum cleaner.
Spilled weighing goods must be removed immediately.
13.2 Servicing, maintenance
The appliance may only be opened by trained service technicians who are authorized
by KERN.
Before opening, disconnect from power supply.
13.3 Disposal
Disposal of packaging and appliance must be carried out by operator according to
valid national or regional law of the location where the appliance is used.
RFC-BA-e-1710 31
14 Instant help
In case of an error in the program process, briefly turn off the balance and disconnect
from power supply. The weighing process must then be restarted from the beginning.
Fault Possible cause
The displayed weight does
not glow.
• The balance is not switched on.
• The mains supply connection has been interrupted
(mains cable not plugged in/ faul ty).
• Power supply interrupted.
• Batteries are inserted incorrectly or empty
• No batteries inserted.
The displayed weight is
permanently changing
• Draught/air movement
• Glass doors not closed
• Table/floor vibrations
• Weighing pan has contact with other objects.
• Electromagnetic fields / static charging (choose
different location/switch off interfering device if
possible)
The weighing result is
obviously incorrect
• The display of the balance is not at zero
• Adjustment is no longer correct.
• The balance is on an uneven surface.
• Great fluctuations in temperature.
• Electromagnetic fields / static charging (choose
different location/switch off interfering device if
possible)
Should other error messages occur, switch balance off and then on again. If the error
message remains inform manufacturer.
32 RFC-BA-e-1710
14.1 Error messages
-------- Load range exceeded – remove or reduce load
Err 4 Zero range exceeded
Err 5 Invalid entry
Err 6 Damaged electronics
Err 8 Adjustment error, check adjustment weight
Err 9 Instable; check environmental conditions
Err 19 Zero point drift;
remove additional preloads (vessels) from the balance and adjust the
scale
- - ol - - Overload; remove the load and adjust the balance
--lo-- Underload; increase load
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