KERN ALJ 160-4A User manual

KERN & Sohn GmbH
Ziegelei 1
D-72336 Balingen
email: [e-mail]
Phone: +49-[0]7433- 9933-0
Fax: +49-[0]7433-9933-149
Internet: www.kern-sohn.com
Operating Manual
Analytical and precision balances
KERN ALJ/ALS/PLJ/PLS
Version 3.5
10/2011
GB
ALJ/ALS/PLJ/PLS-BA-e-1135

ALJ/ALS/PLJ/PLS-BA-e-1135
2
GB KERN
ALJ/ALS/PLJ/PLS
Version 3.510/2011
Operating Manual
Analytical and precision balances
Table of Contents
1Technical Data ............................................................................................... 4
2Explanation of graphical symbols.............................................................. 13
3Basic Information (General)........................................................................ 13
3.1 Proper use................................................................................................................13
3.2 Improper Use............................................................................................................13
3.3 Warranty...................................................................................................................13
3.4 Monitoring of Test Resources...................................................................................13
4Basic Safety Precautions............................................................................ 14
4.1 Pay attention to the instructions in the Operation Manual.........................................14
4.2 Personnel training.....................................................................................................14
5Transportation & Storage............................................................................ 14
5.1 Testing upon acceptance..........................................................................................14
5.2 Packaging / return transport .....................................................................................14
6Unpacking, Setup and Commissioning ..................................................... 15
6.1 Installation Site, Location of Use...............................................................................15
6.2 Unpacking / erection.................................................................................................16
6.2.1 Placing...................................................................................................................................... 16
6.2.2 Scope of delivery / serial accessories....................................................................................... 18
6.3 Appliance overview...................................................................................................18
6.3.1 Front side of the balance.......................................................................................................... 18
6.3.2 Back and bottom side of the balance ....................................................................................... 19
6.4 Controls....................................................................................................................20
6.4.1 Overview of display................................................................................................................... 20
6.4.2 Keyboard overview ................................................................................................................... 20
6.5 Connect and switch-on power supply........................................................................21
6.6 Rechargeable battery operation (depends on model, see chp.1)..............................21
6.7 Connection of peripheral devices..............................................................................22
6.8 Initial Commissioning................................................................................................22
6.8.1 Stability display......................................................................................................................... 22
6.8.2 Balance zero display................................................................................................................. 22
7Adjustment ................................................................................................... 22
7.1 Models with external weight (KERN ALS/PLS)..........................................................23
7.1.1 Adjustment with recommended adjustment weight (factory setting)........................................ 23
7.1.2 Adjustment with weights of other nominal values..................................................................... 24
7.2 Models with internal weight (KERN ALJ/PLJ)............................................................26
7.2.1 Overwrite internal adjustment weight........................................................................................ 28
7.3 Verification................................................................................................................29
8Basic Operation........................................................................................... 31
8.1 Underfloor weighing..................................................................................................32
9User menu.................................................................................................... 33
9.1 Weighing unit............................................................................................................36

ALJ/ALS/PLJ/PLS-BA-e-1135 3
9.2 Data output type .......................................................................................................37
9.3 Baud rate..................................................................................................................38
9.4 Auto Zero..................................................................................................................39
9.5 Filter .........................................................................................................................41
9.6 Standstill control display ...........................................................................................42
9.7 Setting the contrast of the display.............................................................................43
9.8 Display background illumination................................................................................45
9.9 Automatic switch-off function „AUTO OFF“ in stand-by mode...................................46
10 User menu.................................................................................................... 47
10.1 Parts counting...........................................................................................................48
10.1.1 Switching over between quantity and weight display............................................................ 50
10.1.2 Automatic reference optimization......................................................................................... 50
10.1.3 Numeric entering of the reference weight............................................................................ 51
10.2 Density determination (Hydrostatic weighing)...........................................................52
10.2.1 Density determination of solids ............................................................................................ 52
10.2.2 Determining density of liquids .............................................................................................. 54
10.3 Adding function.........................................................................................................56
10.4 Checkweighing .........................................................................................................58
10.5 Percent determination...............................................................................................60
10.5.1 Entering the reference weight by weighing........................................................................... 60
10.5.2 Numeric entering of the reference weight............................................................................ 61
10.6 Animal weighing function..........................................................................................62
10.7 Peak value function ..................................................................................................64
11 Data output RS 232C ................................................................................... 65
11.1 Technical Data..........................................................................................................65
11.2 Pin allocation of balance output plug ........................................................................65
11.3 Interface ...................................................................................................................66
11.4 Data transfer.............................................................................................................66
11.5 Format for data transmission....................................................................................67
11.6 Remote control instructions ......................................................................................69
11.7 Printer mode.............................................................................................................69
12 Error messages............................................................................................ 72
13 Service, maintenance, disposal.................................................................. 73
13.1 Cleaning ...................................................................................................................73
13.2 Service, maintenance ...............................................................................................73
13.3 Disposal....................................................................................................................73
14 Instant help................................................................................................... 74
15 Declaration of Conformity........................................................................... 75

ALJ/ALS/PLJ/PLS-BA-e-1135
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1 Technical Data
KERN ALJ 160-4A ALJ 250-4A ALJ 310-4A
Weighing range (max) 160 g 250 g 310 g
Readability (d) 0.1 mg 0.1 mg 0.1 mg
Reproducibility 0.1 mg 0.1 mg 0.1 mg
Linearity ± 0.3 mg ± 0.3 mg ± 0.3 mg
Stabilization time (typical) 4 sec. 4 sec. 4 sec.
Minimum unit weight at
piece counting > 0,5 mg > 0,5 mg > 0,5 mg
Warm-up time 8 hours
Adjustment weight internal
Reference quantities at
piece counting 10, 25, 50, 100 freely selectable
Weighing Units ct, g, gn, lb, mo, oz, ozt,
tl (HK), tl (Singap. Malays), tl (Tw), pen
Electric Supply 24 V AC, 500mA
Operating temperature + 5° C …. + 35° C
Humidity of air max. 80 % (not condensing)
Housing (B x D x H) mm 210 x 340 x 330
Dimensions of windshield
(B x D x H) mm 160 x 140 x 205 (inside) 190 x 195 x 225 (outside)
Weighing plate (stainless
steel) Ø 80 mm
Weight kg (net) 6.5 kg
Interface RS 232C

ALJ/ALS/PLJ/PLS-BA-e-1135 5
KERN ALS 160-4A ALS 250-4A
Weighing range (max) 160 g 250 g
Readability (d) 0.1 mg 0.1 mg
Reproducibility 0.1 mg 0.1 mg
Linearity ± 0.3 mg ± 0.3 mg
Stabilization time (typical) 4 sec. 4 sec.
Minimum unit weight at
piece counting > 0,5 mg > 0,5 mg
Warm-up time 8 hours
Recommended adjustment weight,
not added (class) 150 g (E2) 200 g (E2)
Reference quantities at
piece counting 10, 25, 50, 100 freely selectable
Weighing Units ct, g, gn, lb, mo, oz, ozt,
tl (HK), tl (Singap. Malays), tl (Tw), pen
Electric Supply 24 V AC, 500mA
Operating temperature + 5° C …. + 35° C
Humidity of air max. 80 % (not condensing)
Housing (B x D x H) mm 210 x 340 x 330
Dimensions of windshield
(B x D x H) mm 160 x 140 x 205 (inside) 190 x 195 x 225 (outside)
Weighing plate (stainless steel) Ø 80 mm
Weight kg (net) 5.7 kg
Interface RS 232C

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KERN PLJ 310-3F PLJ 420-3F PLJ 720-3A
Weighing range (max) 310 g 420 g 720 g
Readability (d) 0.001 g 0.001 g 0.001 g
Reproducibility 0.001 g 0.001 g 0.001 g
Linearity ± 0.003 g ± 0.003 g ± 0.002 g
Stabilization time (typical) 3 sec. 2 sec. 2 sec.
Minimum unit weight at
piece counting > 5 mg > 5 mg > 5 mg
Warm-up time 2 hours 4 hours 4 hours
Adjustment weight internal
Reference quantities at
piece counting 10, 25, 50, 100 freely selectable
Weighing Units ct, g, gn, lb, mo, oz, ozt,
tl (HK), tl (Singap. Malays), tl (Tw), pen
Electric Supply 230V/50 Hz
(Euro) 9V DC 230V/50 Hz (Euro) 9V DC 230V/50 Hz (Euro) 24V AC
Operating temperature + 5° C / + 35° C
Humidity of air max. 80 % (not condensing)
Underfloor weighing - - Clevis type
eyelet, standard
Housing (B x D x H) mm 210 x 340 x 160
Windshield mm
inside Ø 150, 60 high
outside Ø 160, 70 high yes yes yes
Weighing plate
(stainless steel) Ø 11 cm Ø 11 cm Ø 11 cm
Weight kg (net) 4 kg 4.5 kg
Interface RS 232C

ALJ/ALS/PLJ/PLS-BA-e-1135 7
KERN PLJ 1200-3A PLJ 1200-3DA PLJ 3100-2F
Weighing range (max) 1200 g 720 g/1200 g 3100 g
Readability (d) 0.001 g 0.001 g/0.01 g 0.01 g
Reproducibility 0.001 g 0.001 g/0,01 g 0.01 g
Linearity ± 0.003 g ± 0.003 g/0.03 g
± 0.03 g
Stabilization time (typical) 2 sec. 2 sec. 2 sec.
Minimum unit weight at
piece counting > 5 mg > 5 mg > 50 mg
Warm-up time 8 hours 4 hours 4 hours
Adjustment weight internal
Reference quantities at
piece counting 10, 25, 50, 100 freely selectable
Weighing Units ct, g, gn, lb, mo, oz, ozt,
tl (HK), tl (Singap. Malays), tl (Tw), pen
Electric Supply 230V/50 Hz (Euro)24 V AC 230V/50 Hz
(Euro)9 V DC
Operating temperature + 5° C …. + 35° C
Humidity of air max. 80 % (not condensing)
Underfloor weighing
Clevis type eyelet,
standard
Clevis type eyelet,
standard -
Housing (B x D x H) mm 210 x 340 x 160
Windshield mm
inside Ø 150, 60 high
outside Ø 160, 70 high yes yes no
Weighing plate
(stainless steel) Ø 11 cm Ø 11 cm Ø 16 cm
Weight kg (net) 4.5 kg
Interface RS 232C

ALJ/ALS/PLJ/PLS-BA-e-1135
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KERN PLJ 4200-2F PLJ 6200-2A PLJ 6200-2DA
Weighing range (max) 4200 g 6200 g 4200 g /6200 g
Readability (d) 0.01 g 0.01 g 0.01 g /0.1 g
Reproducibility 0.02 g 0.01 g 0.01 g /0.1 g
Linearity ± 0.04 g ± 0.03 g ± 0.03 g / 0.3 g
Stabilization time (typical) 2 sec. 2 sec. 2 sec.
Minimum unit weight at
piece counting > 50 mg > 50 mg > 50 mg
Warm-up time 4 hours
Adjustment weight internal
Reference quantities at
piece counting 10, 25, 50, 100, freely selectable
Weighing Units ct, g, gn, lb, mo, oz, ozt,
tl (HK), tl (Singap. Malays), tl (Tw), pen
Electric Supply 230V/50 Hz
(Euro)9V DC 230V/50 Hz (Euro)24V AC
Operating temperature + 5° C …. + 35° C
Humidity of air max. 80 % (not condensing)
Underfloor weighing - Clevis type
eyelet, standard Clevis type eyelet, standard
Housing (B x D x H) mm 210 x 340 x 100 210 x 340 x 100 210 x 340 x 100
Windshield mm
inside Ø 150, 60 high
outside Ø 160, 70 high no no no
Weighing plate
(stainless steel) Ø 16 cm Ø 16 cm Ø 16 cm
Weight kg (net) 4.5 kg 5 kg 5.0 kg
Interface RS 232C

ALJ/ALS/PLJ/PLS-BA-e-1135 9
KERN PLS 310-3F PLS 420-3F PLS 510-3A
Weighing range (max) 310 g 420 g 510 g
Readability (d) 0.001 g 0.001 g 0.001 g
Reproducibility 0.002 g 0.002 g 0.001 g
Linearity ± 0.003 g ± 0.004 g ± 0.002 g
Stabilization time (typical) 3 sec. 3 sec. 2 sec.
Minimum unit weight at
piece counting > 5 mg > 5 mg > 5 mg
Warm-up time 2 hours 2 hours 4 hours
Recommended adjustment
weight, not added (class) 300 g (E2) 400 g (E2) 500 g (E2)
Reference quantities at
piece counting 10, 25, 50, 100, freely selectable
Weighing Units ct, g, gn, lb, mo, oz, ozt,
tl (HK), tl (Singap. Malays), tl (Tw), pen
Electric Supply 230V/50 Hz (Euro)9V DC 230V/50 Hz
(Euro)24V AC
Operating temperature Operation period 30 h
Loading time 10 h -
Humidity of air + 5° C …. + 35° C
Underfloor weighing max. 80 % (not condensing)
Housing (B x D x H) mm Clevis type eyelet, standard
Windshield mm
inside Ø 150, 60 high
outside Ø 160, 70 high 210 x 340 x 160
Weighing plate
(stainless steel)
Weight kg (net)
inside Ø 150, 60 high
outside Ø 160, 70 high
Interface Ø 11 cm
Weighing range (max) 4 kg 4.5 kg
Readability (d) RS 232C

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KERN PLS 720-3A PLS 1200-3A PLS 1200-3DA
Weighing range (max) 720 g 1200 g 720 g /1,200 g
Readability (d) 0.001 g 0.001 g 0.001 g /0.01 g
Reproducibility 0.001 g 0.001 g 0.001 g /0.01 g
Linearity ± 0.002 g ± 0.003 g ± 0.002 g / 0.02 g
Stabilization time (typical) 2 sec. 2 sec. 2 sec.
Minimum unit weight at
piece counting > 5 mg > 5 mg > 5 mg
Warm-up time 4 hours 8 hours 4 hours
Recommended adjustment
weight, not added (class) 600 g (E2) 1 kg (E2) 1 kg (E2)
Reference quantities at
piece counting 10, 25, 50, 100, freely selectable
Weighing Units ct, g, gn, lb, mo, oz, ozt,
tl (HK), tl (Singap. Malays), tl (Tw), pen
Electric Supply 230V/50 Hz (Euro)24V AC
Rechargeable battery - - -
Operating temperature + 5° C …. + 35° C
Humidity of air max. 80 % (not condensing)
Underfloor weighing Clevis type eyelet, standard
Housing (B x D x H) mm 210 x 340 x 160 210 x 340 x 160 210 x 340 x 160
Windshield mm
inside Ø 150, 60 high
outside Ø 160, 70 high yes yes yes
Weighing plate
(stainless steel) Ø 11 cm Ø 11 cm Ø 11 cm
Weight kg (net) 4.5 kg 4.5 kg 4.5 kg
Interface RS 232C

ALJ/ALS/PLJ/PLS-BA-e-1135 11
KERN PLS 3100-2F PLS 4200-2F PLS 4200-2A
Weighing range (max) 3100 g 4200 g 4200 g
Readability (d) 0.01 g 0.01 g 0.01 g
Reproducibility 0.02 g 0.02 g 0.01 g
Linearity ± 0.03 g ± 0.04 g ± 0.02 g
Stabilization time (typical) 3 sec. 3 sec. 2 sec.
Minimum unit weight at
piece counting > 50 mg > 50 mg > 50 mg
Warm-up time 2 hours 2 hours 4 hours
Recommended adjustment
weight, not added (class) 3 kg (E2) 4 kg (E2) 4 kg (E2)
Reference quantities at
piece counting 10, 25, 50, 100 freely selectable
Weighing Units ct, g, gn, lb, mo, oz, ozt,
tl (HK), tl (Singap. Malays), tl (Tw), pen
Electric Supply 230V/50 Hz (Euro)9V DC 230V/50 Hz
(Euro)24V AC
Rechargeable battery Operation period 30 h
Loading time 10 h no
Operating temperature + 5° C …. + 35° C
Humidity of air max. 80 % (not condensing)
Underfloor weighing Clevis type eyelet, standard
Housing (B x D x H) mm 210 x 340 x 160 210 x 340 x 100 210 x 340 x 100
Windshield mm
inside Ø 150, 60 high
outside Ø 160, 70 high no no no
Weighing plate
(stainless steel) Ø 16 cm Ø 16 cm Ø 16 cm
Weight kg (net) 4 kg 4 kg 4.5 kg
Interface RS 232C

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KERN PLS 6200-2A PLS 6200-2DA PLS 20000-1F
Weighing range (max) 6200 g 4200 g/6200 g 20 kg
Readability (d) 0.01 g 0.01 g/0.1 g 0.1 g
Reproducibility 0.01 g 0.01 g/0.1 g 0.1 g
Linearity ± 0.03 g ± 0.02 g / 0.2 g ± 0.4 g
Stabilization time (typical) 2 sec. 2 sec. 3 sec.
Minimum unit weight at
piece counting > 50 mg > 50 mg > 500 mg
Warm-up time 4 hours 2 hours 2 hours
Recommended adjustment
weight, not added (class) 5 kg (E2) 5 kg (E2) 20 kg (E2)
Reference quantities at
piece counting 10, 25, 50, 100, freely selectable
Weighing Units ct, g, gn, lb, mo, oz, ozt,
tl (HK), tl (Singap. Malays), tl (Tw), pen
Electric Supply 230V/50 Hz (Euro)24V AC 230V/50 Hz
(Euro)9V DC
Operating temperature + 5° C …. + 35° C
Humidity of air max. 80 % (not condensing)
Underfloor weighing Clevis type eyelet, standard
Housing (B x D x H) mm 210 x 340 x 100 210 x 340 x 100 210 x 340 x 100
Windshield mm no no no
Weighing plate
(stainless steel) Ø 16 cm Ø 16 cm 200 x 175 mm
Weight kg (net) 4.5 kg 4.5 kg 4 kg
Interface RS 232C

ALJ/ALS/PLJ/PLS-BA-e-1135 13
2 Explanation of graphical symbols
Note: follow the directions included
in the attached document or
Follow the Operating Instructions
3 Basic Information (General)
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
plate. 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 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.
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
3.4 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.

ALJ/ALS/PLJ/PLS-BA-e-1135
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4 Basic Safety Precautions
4.1 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.
4.2 Personnel training
The appliance may only be operated and maintained by trained personnel.
5 Transportation & 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.
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.

ALJ/ALS/PLJ/PLS-BA-e-1135 15
6 Unpacking, Setup and Commissioning
6.1 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 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, vapors 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 or 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.

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6.2 Unpacking / erection
Carefully remove the balance from the packaging, remove plastic cover and setup
balance at the intended workstation.
6.2.1 Placing
Design layout of weighing balance:
Models ALS/ALJ Models PLS/PLJ, d = 1 mg

ALJ/ALS/PLJ/PLS-BA-e-1135 17
Models PLS/PLJ, d = 100 mg Models PLS/PLJ, d = 10 mg
Level balance with foot screws until the air bubble of the
water balance is in the prescribed circle.

ALJ/ALS/PLJ/PLS-BA-e-1135
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6.2.2 Scope of delivery / serial accessories
•Balance (See chpt. 6.2.1)
•Mains power supply
•Operating Manual
6.3 Appliance overview
6.3.1 Front side of the balance
1
Cover windshield
2
Bubble level
3
Windshield
4
LCD display
5
Function keys
6
Adjustable feet

ALJ/ALS/PLJ/PLS-BA-e-1135 19
6.3.2 Back and bottom side of the balance
1. Weighing plate
2. RS232C interface
3. Foot screws
4. Mains adapter
connection
5. Housing screws
(in models with four feet
first screw out the two
rear feet)
6. Underfloor weighing
device
2
3
1
4
5
6
5

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6.4 Controls
6.4.1 Overview of display
6.4.2 Keyboard overview
Key Designation Short key pressing longtime pressed button
until the acoustic signal
gets mute
MENU button/
•Call-up application
menu
•Select menu items –
scroll forward
•Call-up user menu
•Exit user menu
•Switch-over display
Arrow button •numerical input – scroll backward
ON/OFF switch •Turn on/off
•Exit user menu
CAL button/
•Adjustment
•Select menu items – scroll backward
Arrow button •Numerical input – scroll forward
PRINT button
•Calculate weighing data via interface
•Confirm / store settings
Arrow button
•Numerical input – cipher selection
TARE button •Taring
•Zeroing