KERN RFE 6K3M, RFE 15K3M, RFE 30K3M Operating Manual
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 RFE
Version 1.1
2018-01
GB
RFE-BA-e-1811
2 RFE-BA-e-1811
GB
KERN RFE
Version 1.1 2018-01
Operating manual
Price calculating balance
Contents
1 Technical data ................................................................................................ 4
1.1 Dimensions ................................................................................................................................. 5
2 Declaration of conformity ............................................................................. 5
3 Appliance overview ....................................................................................... 6
3.1 Overview of display .................................................................................................................... 7
3.2 Keyboard overview ..................................................................................................................... 8
4 Basic Information (General ) ........................................................................ 10
4.1 Proper use ................................................................................................................................ 10
4.2 Improper Use ............................................................................................................................ 10
4.3 Warranty ................................................................................................................................... 10
4.4 Monitoring of Test Resources .................................................................................................. 10
5 Basic Safety Precauti on s ............................................................................ 11
5.1 Pay attention to the instructions in the Operation Manual........................................................ 11
5.2 Personnel training ..................................................................................................................... 11
6 Transport and storage ................................................................................. 11
6.1 Testing upon acceptance ......................................................................................................... 11
6.2 Packaging / return transport ..................................................................................................... 11
7 Unpacking, Setup and Commissioning ..................................................... 12
7.1 Installation Site, Location of Use .............................................................................................. 12
7.2 Unpacking ................................................................................................................................. 12
7.2.1 Placing ...................................................................................................................................... 12
7.2.2 Scope of delivery / serial accessories: ..................................................................................... 13
7.3 Mains connection ...................................................................................................................... 13
7.4 Rechargeable battery operation ............................................................................................... 13
7.5 Initial Commissioning ................................................................................................................ 14
7.6 Tripod........................................................................................................................................ 14
7.7 Adjustment ................................................................................................................................ 15
7.8 Verification ................................................................................................................................ 17
7.8.1 Adjustment switch and seals .................................................................................................... 18
7.9 Checking the balance verification settings ............................................................................... 18
8 The menu ...................................................................................................... 19
8.1 Access to menu: ....................................................................................................................... 19
8.2 Menu overview ......................................................................................................................... 20
9 Operation ...................................................................................................... 23
9.1 Turn on/off ................................................................................................................................ 23
9.2 Zeroing ..................................................................................................................................... 23
9.3 Weighing with tare .................................................................................................................... 23
9.4 Overload warning ..................................................................................................................... 24
10 Weighing with price determination ............................................................ 25
10.1 Basic price entry via keyboard ................................................................................................. 25
10.2 Memory for basic price (PLU = Price look up) .......................................................................... 26
10.2.1 Direct PLU memory locations............................................................................................... 26
10.2.2 Indirect PLU memory locations ............................................................................................ 28
10.2.3 Calculating the change ......................................................................................................... 30
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11 Additional useful functions ......................................................................... 32
11.1 Display background illum ination ............................................................................................... 32
11.2 AUTO-OFF ............................................................................................................................... 33
11.3 Date and time ........................................................................................................................... 33
12 RS 232 interface ........................................................................................... 35
12.1 Technical data .......................................................................................................................... 35
12.2 Pin allocation of balance output bushing: ................................................................................. 35
12.3 Data output format .................................................................................................................... 36
12.4 Printout examples: .................................................................................................................... 38
13 Servicing, maintenance, disposal .............................................................. 39
13.1 Cleaning ................................................................................................................................... 39
13.2 Servicing, maintenance ............................................................................................................ 39
13.3 Disposal .................................................................................................................................... 39
14 Instant help ................................................................................................... 40
14.1 Error messages ........................................................................................................................ 41
4 RFE-BA-e-1811
1 Technical data
KERN RFE 6K3M RFE 15K3M RFE 30K3M
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 ± 6 g /± 15 g ± 15 g / ± 30 g
Recommended adjusting
weight (not supplied)
6 kg (M1) 15 kg (M1) 30 kg (M1)
Stabilization time 2 s
Heating time
(operating temperature)
10 min
Net weight (kg) 4.1
Basic price, can be switched
over
€/kg; €/100 g
Admissible
ambient temperature
-10° C to 40° C
Weighing surface (mm) 230 x 300
Tripod height (mm) 395
Auto-Off (battery; min.) 3, 5, 15, 30
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, 4 Ah
Operating period - background illumination OFF:
60 h
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1.1 Dimensions
2 Declaration of conformity
The current EC/EU Conformity declaration can be found online in:
www.kern-sohn.com/ce
For verified weighing scales (= weighing scales assessed for conformity) a
declaration of conformity is included in the scope of delivery.
6 RFE-BA-e-1811
3 Appliance overview
Models without post-mounted display:
Models with post-mounted display:
1. Bubble level
2. Weighing pan
3. Post-mounted display
4. Mains adapter connection
5. RS 232 interface
6. Footscrews
7. A djustment switch
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3.1 Overview of display
1
Weight
2
Taring value
3
Basic price
4
Sales price
5 Storage battery status display
6
Bubble level
Stability display
ZERO
Zeroing display
Battery symbol
€/kg Basic price in €/kg
€/100 g Basic price in €/100 g
AUTO CLEAR
Set basic price is deleted automatically when balance is
unloaded
8 RFE-BA-e-1811
3.2 Keyboard overview
Selection
Function
~
• Numerical keys, PLU-keys
• Delete
~
• Direct PLU k eys
• PLU key
or
• Numeric keys 4 and 6
• Scroll up (4) or down (6) in the menu
• For activated function, the set basic price is automatically
deleted when the balance is unloaded.
• Display background illumination
• Switch-over unit € / kg € / 100g
• Turn on/off balance
• Calculating the change
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• Issue to external device
• Taring
• In menu: Confirm
• Zeroing
• In menu: Exit menu
• Numeric key 0
10 RFE-BA-e-1811
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
damaged 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.
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5 Basic Safety Precautions
5.1 Pay attention to the instructions in the Operation Manual
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.
12 RFE-BA-e-1811
7 Unpacking, Setup and Commis sioning
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 room
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.
7.2.1 Placing
Level balance with foot screws until the air bubble of the
water balance is in the prescribed circle.
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7.2.2 Scope of delivery / serial accessories:
• Balance
• Mains adapter
• Operating manual
• Tripod with screws
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 Rechargeable battery operation
The rechargeable battery is charged via the delivered power supply.
Before the first use, the battery should be charged by connecting it to the mains
power supply for at least 12 hours. Two symbols show the capacity of the
rechargeable battery:
• In the display the symbol
• The LED display above the loading battery status display
*
Description
red:
Battery is almost discharged
green:
Rechargeable battery completely reloaded
yellow:
Charging storage battery
* Loading battery status of the rechargeable battery with this symbol is only correctly
displayed, when the balance is supplied with energy not via the mains adapter.
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