Instruction Manual
School balance
KERN EMS
Version 1.4
01/2015
GB
EMS-BA-e-1514
PCE Americas Inc.
711 Commerce Way
Suite 8
Jupiter
FL-33458
USA
From outside US: +1
Tel: (561) 320-9162
Fax: (561) 320-9176
info@pce-americas.com
www.pce-instruments.com/english
www.pce-instruments.com
PCE Instruments UK Ltd.
Units 12/13
Southpoint Business Park
Ensign way
Hampshire / Southampton
United Kingdom, SO31 4RF
From outside UK: +44
Tel: (0) 2380 98703 0
Fax: (0) 2380 98703 9
info@pce-instruments.com
GB
KERN EMS
Version 1.4 01/2015
Instruction Manual
School balance
Contents
1 Technical data ................................................................................................ 4
2 Basic Information (General) .......................................................................... 6
2.1 Proper use ................................................................................................................................. 6
2.2 Improper Use............................................................................................................................. 6
2.3 Warranty .................................................................................................................................... 6
2.4 Monitoring of Test Resources ................................................................................................. 6
3 Basic Safety Precautions .............................................................................. 7
3.1 Pay attention to the instructions in the Operation Manual .................................................. 7
3.2 Personnel training .................................................................................................................... 7
4 Transportation & Storage .............................................................................. 7
4.1 Testing upon acceptance ........................................................................................................ 7
4.2 Packaging / return transport ................................................................................................... 7
5 Unpacking, Setup and Commissioning ....................................................... 8
5.1 Installation Site, Location of Use ............................................................................................ 8
5.2 Unpacking/installation ............................................................................................................. 8
5.3 Mains connection ..................................................................................................................... 9
5.4 Operation using a (rechargeable) battery (optional) ............................................................. 9
5.5 Initial Commissioning ............................................................................................................ 10
5.6 Linearization ........................................................................................................................... 11
5.7 Adjustment .............................................................................................................................. 14
5.8 Adjustment .............................................................................................................................. 14
6 Operating elements ..................................................................................... 15
6.1 Overview of display ................................................................................................................ 15
6.2 Keyboard overview ................................................................................................................. 15
7 Operation ...................................................................................................... 16
Start-up ................................................................................................................................................. 16
Switching Off ....................................................................................................................................... 16
Weighing............................................................................................................................................... 16
Taring .................................................................................................................................................... 16
PRE-TARE function ............................................................................................................................. 17
Weighing units switch-over ................................................................................................................ 18
Plus/minus weighings ......................................................................................................................... 18
Parts counting...................................................................................................................................... 19
Net-total weighings ............................................................................................................................. 20
Percent determinatio n ......................................................................................................................... 21
2 EMS-BA-e-1514
8 Menu ............................................................................................................. 22
8.1 Navigation in the menu .......................................................................................................... 22
8.2 Menu overview ........................................................................................................................ 25
8.3 Description of individual menu items .................................................................................. 25
Auto Off function ................................................................................................................................. 25
Auto-Zero function .............................................................................................................................. 26
Filter function ....................................................................................................................................... 27
Reset to factory setting ....................................................................................................................... 28
9 Service, maintenance, disposal .................................................................. 29
9.1 Cleaning................................................................................................................................... 29
9.2 Service, maintenance ............................................................................................................. 29
9.3 Disposal ................................................................................................................................... 29
10 Instant help ................................................................................................... 30
11 Declaration of -Conformity .......................................................................... 31
EMS-BA-e-1514 3
1 Technical data
KERN EMS 300-3 EMS 3000-2
Readability (d) 0,001 g 0,01 g
Weighing range (max) 300 g 3000 g
Taring range (subtractive) 300 g 3000 g
Reproducibility 0,002 g 0,02 g
Linearity ±0,005 g ±0,05 g
Minimum unit weight at
piece counting
0,005 g 0,05 g
Warm-up time 120 min 120 min
Reference quantities at
piece counting
5, 10, 20, 25, 50
Weighing Units dwt, g, oz, ozt
Recommended adjustment
weight, not added (class)
300 g
(F1)
3000 g
(F2)
Stabilization time (typical) 3 sec.
Operating temperature + 5° C .... + 35° C
Humidity of air max. 80 % (not condensing)
Housing (B x D x H) mm 200 x 280 x 63
Weighing plate mm Ø 105 160 x 160
Windshield rectang ular m m
inside: 145 x 145 x 65
-
outside: 165 x 165 x 80
Weight kg (net) 1,4
Input Voltage 110V-230V AC
Power pack
secondary voltage
9 V, 300mA
Battery operation
9 V compound battery (optional)
Operating period: 40 h
Auto Off 3 min.
4 EMS-BA-e-1514
KERN EMS 6K0.1 EMS 6K1
EMS 12K0.1
EMS 12K1
Readability (d) 0.1 g 1 g 0.1 g 1 g
Weighing range (max) 6 kg 6 kg 12 kg 12 kg
Taring range (subtractive) 6 kg 6 kg 12 kg 12 kg
Reproducibility 0.1 g 1 g 0.1 g 1 g
Linearity ± 0.3 g ± 3 g ± 0.3 g ± 3 g
Minimum unit weight at
piece counting
0.2 g 2 g 0.2 g 2 g
Warm-up time 120 min 30 min 120 min 30 min
Reference quantities at
piece counting
5, 10, 20, 25, 50
Weighing Units dwt, g, oz, ozt
Recommended adjustment
weight, not added (class)
6 kg (F2) 6 kg (M1) 12 kg (F2) 12 kg (M1)
Stabilization time (typical) 3 sec.
Operating temperature + 5° C .... + 35° C
Humidity of air max. 80 % (not condensing)
Housing (B x D x H) mm 200 x 280 x 63
Weighing plate mm 160 x 160
Weight kg (net) 1,4
Input Voltage 110V-230V AC
Power pack
secondary voltage
9 V, 300mA
Battery operation
9 V compound battery (optional)
Operating period: 40 h
Auto Off 3 min.
EMS-BA-e-1514 5
2 Basic Information (General)
2.1 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
plate. As soon as a stable weighing value is reached the weighing value can be read.
2.2 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“ in the balance. (Example: Slowly
draining fluids from a container on the balance) Do not leave permanent load on the
weighing plate. 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 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.
2.3 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 and damage caused by media, liquids
• Natural wear and tear
• The appliance is improperly set up or incorrectly electrically connected
• The measuring system is overloaded
2.4 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 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.
6 EMS-BA-e-1514
3 Basic Safety Precautions
3.1 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.
3.2 Personnel training
The appliance may only be operated and maintained by trained personnel.
4 Transportation & Storage
4.1 Testing upon acceptance
When receiving the appliance, please check packaging immediately, and the
appliance itself when unpacking for possible visible damage.
4.2 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.
EMS-BA-e-1514 7
5 Unpacking, Setup and Commissioning
5.1 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.
Therefore, observe the following for the installation site:
• Place scales on a stable, even 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 (condensation of air humidity 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 and weighing container.
Major display deviations (incorrect weighing results) may be experienced should
electromagnetic fields (e.g. due to mobile phones or radio equipment), static
electricity accumulations or instable power supply occur. Change location or remove
source of interference.
5.2 Unpacking/installation
Carefully remove the balance from the packaging, remove plastic cover and setup
balance at the intended workstation.
The balance must be installed in a way that the weighing plate is exactly in horizontal
position.
8 EMS-BA-e-1514
Scope of delivery / serial accessories
• Balance
• Weighing plate
• Mains power supply
• Windshield, only EMS 300-3
• Instruction Manual
5.3 Mains conne ction
Power is supplied via the external mains adapter. The stated voltage value must be
the same as the local voltage. Only use original KERN mains adapters. Using other
makes requires consent by KERN.
5.4 Operation us ing a (rechargeable) battery (optional)
Lift-off the battery cover on the lower side of the balance. Connect 9 V compound
battery.
Replace the battery compartment cover.
For battery operation the balance has an automatic switch-off function which can be
activated or deactivated in the menu (see chapter 9.3).
In weighing mode keep the UNIT key pressed until „AF“ appears.
Use the SET key to confirm.
Use the MODE key to choose between the two following settings:
„AF on“:
In order to save the battery, the balance switches automatically
off after 3 minutes without weighing.
„AF off“:
Switch-off function deactivated.
Use the SET key to confirm selection. The balance returns to weighing mode.
EMS-BA-e-1514 9
If the batteries are run down, "LO" appears in the display. Press ON/OFF-key and
replace the batteries immediately.
If the balance is not used for a longer time, take out the batteries and store them
separately. Leaking battery liquid could damage the balance.
If there exists an optional rechargeable battery, it has to be connected in the battery
compartment via a separate plug-in socket. Now the mains adapter delivered with
the rechargeable battery must be applied.
5.5 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. 1). During this
warming up time the balance must be connected to the power supply (mains,
accumulator or battery).
The accuracy of the balance depends on the local acceleration of gravity.
Strictly observe hints in chapter Adjustment.
10 EMS-BA-e-1514
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