KERN RFE 6K3M User manual

KERN & Sohn GmbH
Ziegelei 1
D-72336 Balingen
E-Mail: [e-mail]
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 1.12018-01
Operating manual
Price calculating balance
Contents
1Technical data................................................................................................ 4
1.1 Dimensions................................................................................................................................. 5
2Declaration of conformity ............................................................................. 5
3Appliance overview ....................................................................................... 6
3.1 Overview of display .................................................................................................................... 7
3.2 Keyboard overview..................................................................................................................... 8
4Basic Information (General)........................................................................ 10
4.1 Proper use................................................................................................................................ 10
4.2 Improper Use............................................................................................................................ 10
4.3 Warranty................................................................................................................................... 10
4.4 Monitoring of Test Resources .................................................................................................. 10
5Basic Safety Precautions............................................................................ 11
5.1 Pay attention to the instructions in the Operation Manual........................................................ 11
5.2 Personnel training..................................................................................................................... 11
6Transport and storage................................................................................. 11
6.1 Testing upon acceptance ......................................................................................................... 11
6.2 Packaging / return transport..................................................................................................... 11
7Unpacking, 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
8The menu...................................................................................................... 19
8.1 Access to menu:....................................................................................................................... 19
8.2 Menu overview ......................................................................................................................... 20
9Operation...................................................................................................... 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 illumination............................................................................................... 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.

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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. Adjustment 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 keys
•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 faults and destruction of the balance.
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.