14.3 Acoustic signal for key operation ......................................................................................... 83
14.4 Backlight and brightness control for display ...................................................................... 84
14.5 Date .......................................................................................................................................... 85
14.6 Time ......................................................................................................................................... 86
14.7 Date format .............................................................................................................................. 87
14.8 Time format ............................................................................................................................. 88
22 Declaration of conformity ......................................................................... 119
4 AEJ-C/AES-C/PLJ-C-BA-e-1412
1 Technical data
KERN AEJ 100-4CM AEJ 200-4CM AEJ 200-5CM
Readability (d) 0.1 mg 0.1 mg 0.01 mg; 0.1 mg
Weighing range (max) 160 g 220 g 80 g; 220 g
Minimum load (Min) 10 mg 10 mg 1 mg
Verification value (e) 1 mg 1 mg 1 mg; 1 mg
Verification class I I I
Reproducibility 0.2 mg 0.2 mg 0.04 mg; 0.1 mg
Linearity ± 0.3 mg ± 0.3 mg ± 0.1 mg; 0.2 mg
Stabilization time 4 sec. 4 sec. 6 sec; 3.5sec.
Adjustment weight internal internal internal
Warm-u p time 8 h 8 h 8 h; 8 h
Weighing Units g, mg, ct g, mg, ct g, mg, ct
Smallest part weight for
piece counting
Reference quantities at
piece counting
Weighing plate, stainless
steel [cm]
Net weight (kg) 5.4 5.4 5.4
Permissible
ambient condition
Humidity of air
Input voltage 110 - 230 V AC, 110 - 230 V AC, 110 - 230 V AC,
Power pack
secondary voltage
Interface RS 232C; USB RS 232C; USB RS 232C; USB
Underfloor weighing device Hooks Hooks Hooks
0.1 mg 0.1 mg 0.1 mg
10, 20, 50,
freely selectable
Ø 8.5 Ø 8.5 Ø 8.5
+10° C to +40° C +10° C to +40° C +10° C to +40° C
80 % relative
(not condensing)
13.5 V – 16 V 13.5 V – 16 V 13.5 V – 16 V
10, 20, 50,
freely selectable
80 % relative
(not condensing)
10, 20, 50,
freely selectable
80 % relative
(not condensing)
AEJ-C/AES-C/PLJ-C-BA-e-1412 5
KERN AES 100-4C AES 200-4C
Readability (d) 0.1 mg 0.1 mg
Weighing range (max) 160 g 220 g
Reproducibility 0.2 mg 0.2 mg
Linearity ± 0.2 mg ± 0.2 mg
Stabilization time 4 sec. 4 sec.
Recommended adjusting
weight not supplied (class)
Warm-u p time 8 h 8 h
Weighing Units ct, dwt, g, gn, m g , oz ct, dwt, g, gn, m g , oz
Smallest part weight for
piece counting
Reference quantities at
piece counting
Weighing plate, stainless
steel [cm]
Net weight (kg) 5.4 5.4
Permissible
ambient condition
Humidity of air
Input voltage 110 - 230 V AC, 110 - 230 V AC,
150 g (E2) 200 g (E2)
0.5 mg 0.5 mg
10, 20, 50,
freely selectable
Ø 8.5 Ø 8.5
+18° C to +30° C +18° C to +30° C
80 % relative
(not condensing)
10, 20, 50,
freely selectable
80 % relative
(not condensing)
Power pack
secondary voltage
Interface RS 232C; USB RS 232C; USB
Underfloor weighing device Hooks Hooks
13.8 V 13.8 V
6 AEJ-C/AES-C/PLJ-C-BA-e-1412
KERN PLJ 300-3CM PLJ 600-3CM
Readability (d) 1 mg 1 mg
Weighing range (max) 360 g 600 g
Minimum load (Min) 20 mg 20 mg
Verification value (e) 10 mg 10 mg
Verification class II II
Reproducibility 1 mg 2 mg
Linearity ± 4 mg ± 4 mg
Stabilization time 4 sec. 4 sec.
Adjustment weight internal internal
Warm-u p time 2 h 4 h
Weighing Units ct, g, kg ct, g, kg
Smallest part weight for
piece counting
Reference quantities at
piece counting
Weighing plate, stainless
steel [mm]
Net weight (kg) 4.6 4
Permissible
ambient condition
Humidity of air
Input voltage 100 - 240 V 100 - 240 V
Power pack
secondary voltage
Interface RS 232C; USB RS 232C; USB
Underfloor weighing device Hooks Hooks
freely selectable
+10° C bis +40° C +10° C bis +40° C
5 mg 5 mg
10, 20, 50,
128 x 128 128 x 128
80 % relative
(not condensing)
13.5 V – 16 V 13.5 V – 16 V
10, 20, 50,
freely selectable
80 % relative
(not condensing)
AEJ-C/AES-C/PLJ-C-BA-e-1412 7
KERN PLJ 700-3CM PLJ 3000-2CM
Readability (d) 1 mg 10 mg
Weighing range (max) 750 g 3500 g
Minimum load (Min) 20 mg 500 mg
Verification value (e) 10 mg 100 mg
Verification class II II
Reproducibility 2 mg 10 mg
Linearity ± 4 mg ± 40 mg
Stabilization time 4 sec. 4 sec.
Adjustment weight internal
Warm-u p time 4 h 2 h
Weighing Units ct, g, kg
Smallest part weight for
piece counting
Reference quantities at
piece counting
Weighing plate, stainless
steel [mm]
Net weight (kg) 3.5 4.4
Permissible
ambient condition
Humidity of air
Input voltage 100 - 240 V
Power pack
secondary voltage
Interface RS 232C; USB
Underfloor weighing device Hooks
128 x 128 195 x 195
freely selectable
+10° C bis +40° C
5 mg
10, 20, 50,
80 % relative
(not condensing)
13.5 V – 16 V
8 AEJ-C/AES-C/PLJ-C-BA-e-1412
1.1 Dimensions
AEJ-C/AES-C:
PLJ-C:
AEJ-C/AES-C/PLJ-C-BA-e-1412 9
2 Appliance overview
KERN AEJ/AES-C:
1. Glass wind screen
2. Weighing pan
3. Display
4. Keyboard
5. Levelling screw
10 AEJ-C/AES-C/PLJ-C-BA-e-1412
KERN PLJ-C:
1. Glass wind screen
2. Weighing pan
3. Display
4. Keyboard
5. Levelling screw
AEJ-C/AES-C/PLJ-C-BA-e-1412 11
Connections (all models):
1. Mains connection
2. COM 2 connection
3. COM 1 connection
4. USB 2 connection
5. USB 1 connection
12 AEJ-C/AES-C/PLJ-C-BA-e-1412
2.1 Display and Keyboard Sum m ary
Example AEJ-C:
1. Stability display
2. Zero indicator
3. Information line
4. The non-verified value is given in brackets in verified scales.
5. Weighing unit “g“
AEJ-C/AES-C/PLJ-C-BA-e-1412 13
Button
Function
• Turn on/off
• Invoke data bases
• Function key
• Selection of operating mode
• Invoke adjustment
• Call up menu
• Taring
• Switch-over weighing unit
• In menu: Return to weighing mode
• Scroll backwards in menu
• Scroll forward in menu
• Navigation keys see chap. 2.1.1
• Calculate weighing data via interface
• Confirm/save in menu
• Zeroing
• Delete entry in data base
14 AEJ-C/AES-C/PLJ-C-BA-e-1412
2.1.1 Navigation buttons / numeric input
Button Designation Function
Navigation button
Navigation button
Navigation button
Navigation button
Navigation button
ESC Cancel input
Increase flashing dig i t
Decrease flashing digi t
Digit selection to the right
Digit selection to the left
Confirm entry
AEJ-C/AES-C/PLJ-C-BA-e-1412 15
3 Basic instructions
3.1 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.
3.2 Improper Use
Do not use balance for dynamic add-on weighing procedures, if small amounts of
goods to be weighed are removed or added. The “stability compensation“ installed in
the balance may result in displaying an incorrect measuring value! (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 f ault s and des tr uc ti on o f the bala nce.
The balance may only be used according to the described conditions. Other areas of
use must be released by KERN in writing.
3.3 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
16 AEJ-C/AES-C/PLJ-C-BA-e-1412
3.4 Monitoring of Test Resource s
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.
4 Basic Safety Precautions
4.1 Pay attention to the instr uc t ions in the Operation Manual
Carefully read this operation manual before setup and
commissioning, even if you are already familiar with KERN balances.
All language versions contain a non-binding translation.
The original German is binding.
4.2 Personnel training
The appliance may only be operated and maintained by trained personnel.
5 Transport and storage
5.1 Testing upon acceptance
When receiving the appliance, please check packaging immediately, and the
appliance itself when unpacking for possible visible damage.
5.2 Packaging / return transport
Keep all parts of the original packaging for a possibly required return.
Only use original packaging for returning.
AEJ-C/AES-C/PLJ-C-BA-e-1412 17
Prior to dispatch disconnect all cables and remove loose/mobile
parts.
Figure example KERN AEJ/AES-C
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.
18 AEJ-C/AES-C/PLJ-C-BA-e-1412
AEJ-C/AES-C/PLJ-C-BA-e-1412 19
6 Unpacking, Setup and Commissioning
6.1 Installation Site, Locat ion 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 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 ndensation of air humidity on the ap pli anc e)
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.
6.2 Unpacking and checking
Remove device and accessories carefully from packaging, remove packaging
material and place device at the planned work place. Verify that there has been no
damage and that all packing items are present.
Scope of delivery / serial accessories:
• Balance, see chap. 2
• Mains adapter
• Operating manual
• Protective cover
• Flush-mounted hook
• Transport locking device (models AEJ-C and PLJ-C)
20 AEJ-C/AES-C/PLJ-C-BA-e-1412
6.3 Placing
Remove transportation lock (only models AEJ-C and PLJ-C)
• Level balance with foot screws until the air bubble of the water balance is in the
prescribed circle
• Check levelling regularly
To detach transport locking device, unscrew locking screw.
For transportation screw in locking screw carefully right up to the limit stop.
AEJ-C/AES-C/PLJ-C-BA-e-1412 21
Models AEJ/AES-C
• Open glass wind screen on all sides
• Place protection sheet (1) into the weighing chamber
• Place centring ring (2) on the protection sheet
• Put weighing plate (3) on the centring ring
• Place wind protection ring (4) into the weighing chamber
22 AEJ-C/AES-C/PLJ-C-BA-e-1412
Models PLJ-C:
10 mg models
• Remove adhesive tape from the rubber element (1)
• Place weighing pan (2) on the rubber elements
1 mg models
• Remove adhesive tape from the rubber element (1)
• Place weighing pan (2) on the rubber elements
• Place wind shield (3)
AEJ-C/AES-C/PLJ-C-BA-e-1412 23
6.4 Mains connection
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.
6.4.1 Turning On the Power
• Supply balance with power via the mains adapter. The display unit lights up and
shown the software version. The weighing scale carries out a self-test and
automatically moves into weighing mode.
When „CAL“ appears on the display, an automatic adjustment will take place
(only models AEJ-C and PLJ-C).
6.5 Connection of periphera l de vi c e s
Before connecting or disconnecting of additional devices (printer, PC) to the data
interface, always disconnect the balance from the power supply.
With your balance, only use accessories and peripheral devices by KERN, as they
are ideally tuned to your balance.
6.6 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).
To adapt the balance to ambient conditions, open wind screen doors.
The accuracy of the balance depends on the local acceleration of gravity.
Strictly observe hints in chapter Adjustment.
24 AEJ-C/AES-C/PLJ-C-BA-e-1412
7 Adjustment
• Adjustment can only be carried out when the weighing pan is free of objects.
• You can cancel the adjustment by pressing the UNIT-key.
As the acceleration value due to gravity is not the same at every location on earth,
each balance must be coordinated - 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 must be carried out for the first commissioning, 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.
• Manual adjustment by internal weight is triggered by pressing CAL
• Adjustment with external weight, see chap. 7.2.2
Any loads remaining on the weighing pan will be indicated by error message
Er1Hi.
AEJ-C/AES-C/PLJ-C-BA-e-1412 25
7.1 Automatic adjustment with internal weight (only AEJ-C and
In weighing scales with type approval certificate
PLJ-C)
With the internal adjustment weight, the weighing accuracy can be checked and readjusted at any time.
The automatic adjustment function is always enabled. You can start adjustment at
any time by pressing the CAL-key manually.
If a load is present on the weighing plate, the message LIMIT EXCEEDED will
appear on the display. If the weight on the weighing plate is below 4% of max, the
weighing scale nevertheless will be adjusted.
Automatic adjustment is carried out:
• When balance was disconnected from the mains.
• When the temperature is changing
The moment a change in temperature of 3°C is detected by the temperature
sensor, the weighing scale will carry out a fully automatic adjustment. The °C
symbol indicates the pending adjustment.
•at the end of a time interval
After the time interval (selectable 1-12 h) specified in the menu has passed.
•Adjustment takes place every 3 hours
26 AEJ-C/AES-C/PLJ-C-BA-e-1412
•Ensure that there are no objects on the weighing pan.
the menu item. To return to weighing mode, press UNIT.
7.2 Menu settings
Menu item „P1 ADJUSTMENT“ [Adjustment]
AEJ-C / PLJ-C AES-C
P1.1 INT.JUST. -
- P1.2 EXT.JUST.
- P1.3 BE.JUST.
P1.4 TEST JUST. -
* = Locked in weighing scales with type approval certificate [Er 9 lock].
Internal adjustment, ILJ-C only
External adjustment *
User adjustment
Adjustment test
Carry out adjustment with the help of the recommended adjustment weight (see
chapter 1 “Technical Specifications”).
Observe stable environmental conditions. A warming up time (see chapter 1) is
required for stabilization.
weighing pan. Press PRINT-key,
CALIBRATION (JUSTAGE) will be shown.
•This function is locked in weighing scales with type approval certificate.
required adjustment weight appears.
(Example)
Place the required adjustment weight
carefully in the centre of the weighing plate
and press the PRINT key.
The display is showing CALIBRATION,
adjustment is starting.
Adjustment is completed when the
message REMOVE MASS appears;
remove adjustment weight. After
successful adjustment the weighing scale
will return automatically to sub-menu item
P 1.2.
To return to weighing mode, press the
28 AEJ-C/AES-C/PLJ-C-BA-e-1412
Start the process in weighing mode
repeatedly pressing UNIT
7.2.3 P1.3 BE.JUST. User adjustment (model AES-C only)
This function allows the user to select a test weight of an arbitrary weight value.
Having said this, the test weight should not amount to less than 30% of the maximum range.
This function is not accessible in calibrated weighing scales!
as shown on the picture.
Digits will appear on the display, with
the digit on the left flashing. Use the
arrow keys to enter your desired
adjustment weight and confirm by
pressing PRINT.
Care should be taken to ensure that
there are no objects on the weighing
plate, then confirm by pressing
PRINT.
Wait until the weighed value for the
set adjustment weight appears.
Place the required adjustment
weight carefully in the centre of the
weighing plate and press the PRINT
key. The display is showing
CALIBRATION, adjustment is
starting.
Adjustment is completed when the
message REMOVE MASS appears;
remove adjustment weight. After
successful adjustment the weighing
scale will automatically r et ur n to submenu item P 1.3.
Return to weighing mode by
AEJ-C/AES-C/PLJ-C-BA-e-1412 29
7.2.4 P1.4 TEST JUST.
This function is applied to compare the internal adjustment weight with the saved
value. The test is carried out automatical l y. The result will be shown on the display
and issued via the interface if an optional printer is connected.